Crushing, grading and screening device for construction waste

Abstract

The invention relates to the technical field of crushing devices, and particularly discloses a crushing, grading and screening device for construction waste, which comprises a crushing box and a feeding cylinder, and is characterized in that the impact end of a power impact mechanism is positioned in an inner cavity of the crushing box; the sieve plate mechanism is arranged on a discharge port in the bottom end of the crushing box, and the sieving size of the sieve plate mechanism is non-fixed; the counterattack lining plate is rotatably arranged in an inner cavity of the crushing box; the counterattack lining plate is rotatably arranged in an inner cavity of the crushing box; the distances between the two ends of the impact lining plate and the impact end of the power impact mechanism in the first state are equal, and the distances between the impact lining plate and the impact end of the power impact mechanism in the second state are gradually reduced from the feeding direction to the discharging direction. The one-way elastic damper is fixedly arranged in the inner cavity of the feeding cylinder and connected to the back of the impact lining plate, and the one-way elastic damper is used for applying thrust to the impact lining plate so as to keep the impact lining plate in the first state by default. The main purpose of the invention is to improve the crushing efficiency and smoothness.

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 prior art, 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 for maintenance. This makes the prior art 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-mentioned purpose, the embodiment of the present application provides a construction waste crushing, grading and screening device, including a crushing box and a feeding cylinder, and also including: A power impact mechanism, wherein the impact end of the power impact mechanism is located in the inner cavity of the crushing box; 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 non-fixed; The impact liner is rotatably arranged in the inner cavity of the crushing box; the distances between the two ends of the impact liner and the impact end of the power impact mechanism are equal in the first state, and 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 in the second state; 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.

[0005] 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, 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 movably arranged in the inner cavity of the snap-fit ​​plate in a linear direction, and the two rack plates are meshed and connected with 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 is 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, which is used to drive the impact liner to switch from a first state to a second state.

[0006] In a feasible embodiment, the opening and closing assembly includes an outer shell that is snapped onto the outer wall of the upper half of the crushing box, and also includes: a rotating shaft that can be rotatably arranged in the inner cavity of the outer shell; a push rod is sleeved on the outer wall of the rotating shaft; two connecting columns can be movably clamped on both ends of the push rod, and the two connecting columns are respectively connected to the moving rod and the impact liner.

[0007] In a feasible embodiment, the power impact mechanism includes a driving 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 driving 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 intervals along the circumferential direction.

[0008] In a feasible implementation manner, 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 position of the rotating axis of the rotating seat is lower than the bottom end of the impact liner.

[0009] In a feasible embodiment, the screen plate mechanism includes: an outer frame, which is generally arc-shaped and 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.

[0010] 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 arranged 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 meshed on the teeth of the adjustment plate.

[0011] In a feasible implementation manner, a replaceable steel plate is further provided on the outer wall of the baffle facing outward.

[0012] In a feasible implementation manner, a return conveyor belt is further provided below the screen plate mechanism, and an output end of the return conveyor belt is located in the feed barrel.

[0013] The present application provides a crushing, grading and screening device for construction waste. The present application provides a crushing, grading and screening device for construction waste, which 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

[0014] Figure 1 A schematic diagram of the structure of a construction waste crushing, grading and screening device provided in an embodiment of the present application is shown; Figure 2 A schematic diagram of the internal structure of the feed barrel provided in an embodiment of the present application is shown; Figure 3 A schematic diagram of the structure of the counterattack liner provided in an embodiment of the present application is shown; Figure 4 A schematic diagram of the structure of a rack plate provided in an embodiment of the present application is shown; Figure 5 A schematic diagram of the structure of a crushing roller and a crushing lug provided in an embodiment of the present application is shown; Figure 6 Shows Figure 5 A local enlarged structural diagram of the part; Figure 7 A schematic diagram of the structure of a rotating seat provided in an embodiment of the present application is shown; Figure 8 A schematic diagram of the structure of a one-way elastic damper provided in an embodiment of the present application is shown; Fig. 9 A schematic structural diagram of a sieve plate mechanism provided in an embodiment of the present application is shown; Fig.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.

[0015] 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

[0016] 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.

[0017] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0018] Example 1

[0019] 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 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 handling construction waste and difficult to adapt to the characteristics of different materials, resulting in low processing efficiency and increased costs. Therefore, a new type of construction waste crushing, grading and screening device is urgently needed to improve crushing efficiency and reduce maintenance costs.

[0020] 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.

[0021] like Figures 1 to 10 As shown, the embodiment of the present application provides a crushing, grading and screening device for construction waste, including a crushing box 10 and a feed barrel 20, and also includes: a power impact mechanism 30, a screen plate mechanism 40, an impact lining 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 lining 50 can be rotatably arranged in the inner cavity of the crushing box 10; the distance between the two ends of the impact lining 50 and the impact end of the power impact mechanism 30 is equal in the first state, and the distance between the impact lining 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 lining 50, and the one-way elastic damper 60 is used to apply thrust to the impact lining 50 to keep the impact lining 50 in the first state by default.

[0022] The equipment provided in the present application is improved on the basis of 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 will cause 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 load on the motor. In common cases, the machine needs to be shut down for processing. Therefore, the crusher in the prior art has a certain difficulty in breaking the difficult-to-crush material into fine particles at one time, or has certain conditions for the input material.

[0023] 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-stage type, such as an upper stage and a lower stage, wherein the upper stage can be disassembled from the lower stage, thereby facilitating the maintenance of the equipment, and the feed barrel 20 is connected to the upper stage 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, 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 is arc-shaped. 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 of the impact liner 50 close to the feed port and the impact end 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 to be processed, and has a wider range of practical applications.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Fig.10As shown, in some examples, further, the feed barrel 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 fixedly connected to the top of the baffle 23; the two rack plates 25 are both movable in the inner cavity of the snap-fit ​​plate 22 in a linear direction, 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, which is used to drive the impact liner 50 to switch from the first state to the second state.

[0025] 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, which 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, which is used 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, and 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, so as to flexibly respond to this large volume of material.

[0026] In the present process, specifically, 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 moving 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 moving rod 26, and can switch the impact liner 50 between the first and second states by driving the movement of the moving 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 practicability and reliability of the equipment.

[0027] 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.

[0028] like Figure 5 , Figure 6 and Fig.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 on 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.

[0029] 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 rotates freely 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 two ends of the push rod 272 are driven to move forward and backward through the rotation of the rotating shaft 271; 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 pushes 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 cope 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.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Fig.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 can be 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.

[0031] In this example, the power impact mechanism 30 is used to achieve efficient material crushing effect; as the power system in this device, it mainly includes a drive motor, which is fixed on 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 equidistantly 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, so that the crushing protrusions 33 rotate at a high speed and continuously impact the construction waste entering the crushing box 10; Figure 1As shown, the transmission component 31 can adopt a transmission method of a pulley and a belt, so that the continuous rotation and impact action effectively crushes large pieces of material into small pieces, thereby improving the crushing efficiency of construction waste.

[0032] 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 .

[0033] It is understandable that the purpose of adjusting the impact liner 50 in the present device is to expand the processing space of the material in the crushing box 10. When the rotating end of the impact liner 50 is located within the range of the impact liner 50, the top of the impact liner 50 will be moved outward, but the bottom of the impact liner 50 is closer to the impact end of the power impact mechanism 30; instead, the processing space is reduced. In order to be able to expand the processing space of the material in all aspects, and thus further improve the processing fluency of the material, in this example, the rotating seat 51 is set at a position significantly lower than the impact liner 50. In this way, after the impact liner 50 is pushed by the opening and closing assembly 27, it can move in a way that the impact liner 50 moves outward as a whole, and the moving span of the upper half of the impact liner 50 after the movement is larger, and the span of the lower part is smaller than the moving span of the upper half, forming a processing channel that gradually narrows from top to bottom to ensure the particle diameter size of the final processed material, and also to ensure the fluency of the crushing process.

[0034] 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 in sequence and equidistantly; the inner frame 43 can move along the curved direction of the outer frame 41 and be clamped under the outer frame 41; the plurality of second screen bars 44 are arranged in the inner frame 43 in sequence and equidistantly and can fit 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.

[0035] 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 conventional 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. In other words, 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, a dynamic screening mechanism is used to release these particles slightly larger than conventional materials outside 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.

[0036] In the specific implementation process, a plurality of 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 bar 44 is located below the first screen bar 42, and the positions of the two overlap. At this time, the gap of the screen body that can leak out is the largest, and a larger volume of building particles can pass through, so as to deal with the debris of large pieces of construction waste that have not been completely crushed at one time, and they can be slowly put into the equipment again for secondary treatment.

[0037] like Fig. 9 and Fig.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 arranged 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 meshed on the teeth of the adjustment plate 45.

[0038] Based on the previous example, this example provides a dynamic response mechanism that can automatically adjust the gap of the screen body following the impact liner 50, thereby eliminating the need for manual or active adjustment. The overall equipment has an adaptive active adjustment response function after a large volume of 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.

[0039] In some examples, further, the damping direction of the one-way elastic damper 60 is during the process of the counter-attack 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 counter-attack lining 50 recovering from the second state to the first state.

[0040] In this example, the setting of the one-way elastic damper 60 ensures that when a large piece of construction waste enters the baffle 23, the counter-attack liner 50 is finally pushed to the second state through the above-mentioned mechanical action. However, the large piece of construction waste will then break away from the baffle 23 and enter the crushing box 10. In order to prevent the counter-attack 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 counter-attack liner 50, so that the counter-attack liner 50 is also in a position other than the first state during the crushing process of the large piece of construction waste. After the large piece of construction waste has been processed, when the small volume of construction waste continues to be processed, the counter-attack liner 50 can automatically return to the first state from the second state. The damper is applied elastically in the direction of slow resetting with the help of elastic force. Since this structure is a mature technology in the prior art, it will not be described in detail in this example.

[0041] In some examples, further, a replaceable steel plate is provided on the outer wall of the baffle 23 facing outward.

[0042] 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 after a period of use if the steel plate is severely damaged, thereby simplifying the maintenance process and reducing maintenance costs.

[0043] In some examples, further, a reflux conveyor belt (not shown) is provided below the screen plate mechanism 40 , and an output end of the reflux conveyor belt is located in the feed barrel 20 .

[0044] It can also be understood that the return conveyor belt arranged below the screen plate mechanism 40 has its output end located in the feed barrel 20, forming a closed-loop material processing system. When the incompletely crushed parts of the screened construction waste fall into the return conveyor belt through the screen plate, these materials will be transported back to the feed barrel 20 and put into the crushing box 10 again for multi-stage processing, thereby ensuring the crushing processing quality of the equipment.

[0045] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or electronic device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or electronic device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or electronic device including the elements.

[0046] 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 adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0047] The above are only 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 modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should 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) is fixedly arranged in the inner cavity of the feed barrel (20) and connected to the back of the impact lining (50). The one-way elastic damper (60) is used to apply a thrust to the impact lining (50) to keep the impact lining (50) in the first state by default.

2. The construction waste crushing, grading and screening device according to claim 1 is characterized in that: 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.

3. The construction waste crushing, grading and screening device according to claim 2 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).

4. The construction waste crushing, grading and screening device according to claim 2, 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.

5. The construction waste crushing, grading and screening device according to claim 4 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).

6. The construction waste crushing, grading and screening device according to claim 5, 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).

7. The construction waste crushing, grading and screening device according to claim 6, 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).

8. The device for crushing, grading and screening construction waste according to claim 6, characterized in that: A replaceable steel plate is also provided on an outer wall of the baffle (23) facing outward.

9. The device for crushing, grading and screening construction waste according to claim 6, 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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