Multistage crushing device for engineering waste and method of use

Abstract

The application relates to a multi-stage crushing device for engineering waste, which comprises a base, a support rod vertically arranged on the base, a feeding hopper arranged at the top of the support rod, a rolling roller for crushing the engineering waste rotatably arranged in the feeding hopper, a feeding port arranged at the top of the feeding hopper, a discharging port arranged at the bottom of the feeding hopper and communicated with the outside, a crushing mechanism slidably arranged through the support rod, the crushing mechanism arranged below the discharging port, two crushing tooth plates oppositely and vertically arranged on the crushing mechanism, the two crushing tooth plates capable of being close to each other to extrude the engineering waste, a first screening element arranged below the crushing tooth plates and connected with the crushing tooth plates, and a grinding mechanism arranged below the first screening element, the grinding mechanism being provided with a grinding lower pressing plate connected with the crushing mechanism and vertically moved synchronously, and the second screening element being vertically arranged on the two sides of the grinding lower pressing plate. The engineering waste is crushed by the feeding mechanism, the crushing mechanism and the grinding mechanism in three stages, so that the engineering waste can be fully crushed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of foundation pit construction engineering, in particular to a multi-stage engineering waste crushing device and a use method thereof. BACKGROUND

[0002] With the progress of society and the development of technology, more and more buildings are built, and more and more construction waste is generated at the same time. Construction waste refers to concrete blocks, discarded materials and other waste generated during the construction of various buildings. These construction wastes are not helpful to the construction itself, but are substances generated during the construction process. Some construction wastes are large in size and extremely inconvenient to transport and store. The existing construction waste is usually crushed in one step, which cannot completely crush the construction waste and is not conducive to the transportation and storage of the construction waste. SUMMARY

[0003] The present application aims to overcome the defects of the prior art and provide a multi-stage engineering waste crushing device and a use method thereof, which solves the problem that existing construction waste is generated at the same time as the construction of buildings. Construction waste refers to concrete blocks, discarded materials and other waste generated during the construction of various buildings. These construction wastes are not helpful to the construction itself, but are substances generated during the construction process. Some construction wastes are large in size and extremely inconvenient to transport and store. The existing construction waste is usually crushed in one step, which cannot completely crush the construction waste and is not conducive to the transportation and storage of the construction waste.

[0004] The technical solution to achieve the above-mentioned purpose is:

[0005] The present application provides a multi-stage engineering waste crushing device, characterized in that it comprises:

[0006] a base, the base vertically supports a support rod;

[0007] a feed hopper provided at the top of the support rod, the feed hopper internally rotates a rolling roller for crushing the engineering waste, the top of the feed hopper is provided with a feed port, and the bottom of the feed hopper is provided with a discharge port in communication with the outside;

[0008] a crushing mechanism slidably penetrating the support rod, the crushing mechanism is arranged below the discharge port, the crushing mechanism is vertically provided with two opposite crushing tooth plates, the two crushing tooth plates can press the engineering waste towards each other, a first screening element is arranged below the crushing tooth plate, and the first screening element is connected with the crushing tooth plate;

[0009] a grinding mechanism arranged below the first screening element, the grinding mechanism is provided with a grinding lower pressing plate connected with the crushing mechanism and vertically moving synchronously, and second screening elements are vertically arranged on both sides of the grinding lower pressing plate.

[0010] The further improvement of the multi-stage crushing device for engineering waste lies in that a part of the outer periphery of the rolling roller is provided with rotating crushing teeth.

[0011] The further improvement of the multi-stage crushing device for engineering waste lies in that the driving mechanism for driving the rolling roller is arranged on the side wall of the feeding hopper.

[0012] The further improvement of the multi-stage crushing device for engineering waste lies in that the driving mechanism comprises a motor, a sector gear, a contact block, a rotating protrusion, a limiting plate and a first spring.

[0013] The sector gear is coaxially connected with the rolling roller on the outer side wall of the feeding hopper, and the two sector gears are meshed with each other.

[0014] The limiting plate is fixedly arranged on the outer side wall of the feeding hopper close to the sector gear.

[0015] The first spring is connected between the limiting plate and the sector gear.

[0016] The contact block is arranged on the outer side of the sector gear.

[0017] The rotating protrusion is rotatably connected with the outer side wall of the feeding hopper, and the rotating protrusion can abut against the contact block when rotating.

[0018] The motor is arranged in the interior of the feeding hopper, and the motor is driven by a driving shaft, the driving shaft penetrates the outer side wall of the feeding hopper, and the rotating protrusion is coaxially rotatable with the driving shaft.

[0019] The further improvement of the multi-stage crushing device for engineering waste lies in that the crushing mechanism further comprises a rotating disc fixedly connected with the driving shaft, a first connecting rod hingedly connected with the rotating disc and a baffle hingedly connected with the other end of the first connecting rod.

[0020] The driving disc is arranged on the outer side wall of the feeding hopper.

[0021] The first connecting rod is vertically arranged.

[0022] The baffle is provided with two baffle plates arranged on both sides of the two crushing tooth plates, and two second connecting rods are hingedly arranged on each baffle plate, and the second connecting rods are arranged in an inclined manner.

[0023] The side away from the other side of the two crushing tooth plates is connected with a sliding rod, the sliding rod penetrates and slides on the supporting rod, and the sliding rod is hingedly connected with the end of the corresponding second connecting rod.

[0024] The further improvement of the multi-stage crushing device for engineering waste lies in that the first screening member comprises a third connecting rod, a fixed cylinder, a screening plate, a stop block and a second spring.

[0025] The third connecting rod is coaxially hinged to the slide rod with the second connecting rod, and the other end of the third connecting rod is hinged to the grinding mechanism, and the two third connecting rods are symmetrically arranged about the baffle plate.

[0026] The fixed cylinder is horizontally fixed to the third connecting rod.

[0027] The screening plate is slidably arranged in the fixed cylinder, and the two screening plates abut each other below the crushing tooth plate, and one end of the screening plate close to the outer side is connected with the stop block.

[0028] The second spring is connected between the stop block and the fixed cylinder.

[0029] The further improvement of the multi-stage crushing device for engineering waste lies in that the grinding mechanism comprises a grinding base and a grinding plate.

[0030] The grinding lower pressing plate is hinged to the third connecting rod, the bottom of the grinding lower pressing plate is provided with a grinding feeding port, the second screening members are fixedly connected to the two sides of the grinding lower pressing plate respectively, the grinding base is connected to the bottom of the two second screening members, the grinding plate is arranged on the base, the grinding plate is arranged below the grinding lower pressing plate, and the grinding lower pressing plate can be in grinding contact with the grinding plate when the grinding lower pressing plate moves downward.

[0031] The further improvement of the multi-stage crushing device for engineering waste lies in that the base is provided with a limiting member, and the limiting member is embedded in the bottom of the grinding plate.

[0032] The further improvement of the multi-stage crushing device for engineering waste lies in that the second screening member comprises a plurality of vertical rods, one end of the vertical rod is fixedly connected with the grinding lower pressing plate, the other end of the vertical rod is fixedly connected with the grinding base, and a screening gap is left between the vertical rods.

[0033] The further improvement of the multi-stage crushing device for engineering waste lies in that the grinding mechanism further comprises a third spring.

[0034] One end of the third spring is fixedly connected with the bottom of the grinding plate, and the other end of the third spring is fixedly connected to the grinding base, and the limiting member and the grinding plate leave a gap in the vertical direction.

[0035] The beneficial effects of the present application are: the engineering waste is poured into the feeding mechanism, the engineering waste is primary crushed by the rolling roller, and due to the fact that the outer peripheral part of the rolling roller is not provided with rotating crushing teeth, when the rolling roller rotates, the part without rotating crushing teeth will block the engineering waste from entering the discharge port, so the intermittent feeding effect can be achieved, and the engineering waste is crushed by three stages of the feeding mechanism, the crushing mechanism and the grinding mechanism, so that the engineering waste can be fully crushed. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a front view of the engineering waste multi-stage crushing device of the present application.

[0037] Figure 2 It is a front view of the feeding mechanism in the engineering waste multi-stage crushing device of the present application.

[0038] Figure 3 It is a front view of the crushing mechanism in the engineering waste multi-stage crushing device of the present application.

[0039] Figure 4 It is a sectional view of the engineering waste multi-stage crushing device of the present application.

[0040] Figure 5 It is a sectional view of the engineering waste multi-stage crushing device of the present application.

[0041] 21, base; 212, support rod;

[0042] 31, feeding mechanism; 311, feeding hopper; 312, fan-shaped gear; 313, limiting plate; 314, first spring; 315, abutting block; 316, rotating protrusion; 317, rolling roller; 318, rotating crushing teeth; 319, motor;

[0043] 41, crushing mechanism; 411, crushing tooth plate; 412, crushing tooth; 413, sliding rod; 414, baffle; 415, first connecting rod; 416, second connecting rod; 417, third connecting rod; 418, fixed cylinder; 419, stop block; 420, second spring; 421, screening plate; 422, first screening element;

[0044] 51, grinding mechanism; 511, grinding lower pressing plate; 512, grinding plate; 513, second screening element; 514, vertical rod; 515, third spring; 516, limiting element. DETAILED DESCRIPTION

[0045] The engineering waste multi-stage crushing device disclosed by the application solves the problem that the construction waste is increasing while the construction is being carried out, the construction waste refers to the concrete blocks, discarded materials and other waste generated in the process of constructing various buildings, the construction waste is not helpful for the construction itself, but is the material generated in the construction process, and part of the construction waste has a large size, and the transportation and storage are extremely inconvenient, the existing construction waste is usually crushed in one step, the construction waste cannot be completely crushed, and the transportation and storage of the construction waste are not facilitated. The engineering waste is poured into the feeding mechanism, the engineering waste is crushed in one stage through the rolling roller, and the outer peripheral part of the rolling roller is not provided with a rotary crushing tooth, when the rolling roller rotates, the part without the rotary crushing tooth blocks the engineering waste from entering the discharge port, so that the intermittent feeding effect can be achieved, and the engineering waste is crushed in three stages through the feeding mechanism, the crushing mechanism and the grinding mechanism, so that the engineering waste can be fully crushed.

[0046] The application will be further described in combination with the drawings and specific embodiments.

[0047] Referring to Figure 1 , a front view of the engineering waste multi-stage crushing device is shown. As Figure 1 shown, the engineering waste multi-stage crushing device comprises a base 21, a feeding mechanism 31, a crushing mechanism 41 and a grinding mechanism 51.

[0048] The base 21 is placed on the working plane, and the support rod 212 is vertically arranged on the base; the feeding mechanism 31 is arranged above the base 21 and is arranged at the top of the support rod 212, the top of the feeding mechanism 31 is open, the feeding mechanism 31 is provided with a rolling roller 317 for crushing engineering waste, a discharge port is arranged at the bottom of the feeding mechanism 31 and is communicated with the outside, and the engineering waste is discharged from the discharge port to the crushing mechanism 41 after the first crushing by the feeding mechanism 31; the crushing mechanism 41 is arranged above the base 21 and directly below the discharge port, and the crushing mechanism 41 is vertically provided with two opposite crushing tooth plates 411, the two crushing tooth plates 411 can press the engineering waste, the first screening element 422 is arranged below the crushing tooth plate 411 and is arranged on the base 21, the engineering waste enters the crushing mechanism 41 through the feeding mechanism 31, the engineering waste is secondarily crushed by the two crushing tooth plates 411, and then the engineering waste is screened by the first screening element 422 and enters the grinding mechanism 51; the grinding mechanism 51 is arranged directly below the first screening plate and is connected with the crushing mechanism 41, the grinding mechanism 51 is provided with a grinding lower pressing plate 511 which is connected with the crushing mechanism and vertically moves synchronously, the second screening element 513 is vertically arranged on the two sides of the grinding lower pressing plate 511, the engineering waste is output after being secondarily screened by the second screening element 513, and the engineering waste meeting the specification requirements is obtained.

[0049] In another preferred embodiment of the engineering waste multi-stage crushing device, the feeding mechanism 31 is supported by a plurality of support rods 212, which simplifies the structure and reduces the manufacturing cost.

[0050] Referring to Figure 2 , a front view of the feeding mechanism 31 in the engineering waste multi-stage crushing device is shown. Referring to Figure 4 , a sectional view of the engineering waste multi-stage crushing device is shown. In combination with Figure 2 and Figure 4 , the feeding mechanism 31 in the engineering waste multi-stage crushing device comprises a feeding hopper 311 and a rolling roller 317.

[0051] The feeding hopper 311 is arranged on the base 21 by the support rod 212, the top of the feeding hopper 311 is open, a discharge port for the engineering waste to enter the crushing mechanism 41 is arranged at the bottom of the feeding hopper 311, and the rolling roller 317 is arranged in the feeding hopper 311, a rotating crushing tooth is arranged on the outer periphery of the rolling roller 317, so that the rolling roller 317 can realize the functions of partial rolling and partial blocking when rotating, and the effect of intermittent discharging is realized.

[0052] The rolling roller in the engineering waste multi-stage crushing device is driven by a driving mechanism, and the driving mechanism comprises a motor 319, a sector gear 312 and a rotating protrusion 316.

[0053] The motor 319 is arranged in the interior of the feeding hopper 311, and is arranged at the middle position of the upper portion of the feeding hopper 311. The motor 319 drives a driving shaft which penetrates through the side surface of the feeding hopper 311. The rotating protrusion 316 is arranged on the outside of the side wall of the feeding hopper 311 in a rotating manner. The rotating protrusion 316 is fixedly connected with the driving shaft. The two fan-shaped gears 312 are arranged on the outside wall of the feeding hopper 311 in a meshing manner. The outside of each of the two fan-shaped gears 312 is provided with a limiting plate 313. The limiting plate 313 and the fan-shaped gear 312 are fixedly connected with the two ends of the same first spring 314. The first spring 314 is kept in a compressed state. The fan-shaped gear 312 is provided with a contact block 315 which is arranged on the outside of the fan-shaped gear 312. The rotating protrusion 316 is driven to rotate by the motor. When the rotating protrusion 316 rotates, the contact block 315 can be pushed towards the first spring 314. The contact block 315 drives the fan-shaped gear 312 to press the first spring 314. When the rotating protrusion 316 rotates to be separated from the contact block 315, the first spring 314 pushes the fan-shaped gear 312 to reset. The rolling and crushing roller 317 is arranged in the interior of the feeding hopper 311 and is coaxially connected with the fan-shaped gear 312. The outer peripheral portion of the rolling and crushing roller 317 is provided with rotating crushing teeth 318. The rotation of the fan-shaped gear 312 on the outside of the feeding hopper 311 drives the rotating gear to rotate in the same direction. Since the outer peripheral portion of the rolling and crushing roller 317 is only partially provided with the rotating crushing teeth 318, when the rolling and crushing roller 317 rotates and crushes the engineering waste, the outer peripheral portion provided with the rotating crushing teeth 318 crushes the engineering waste, and the outer peripheral portion not provided with the rotating crushing teeth 318 blocks the engineering waste to discharge, so as to realize the intermittent discharging of the engineering waste, control the discharging speed of the engineering waste, and improve the crushing rate of the engineering waste.

[0054] In another preferable embodiment of the engineering waste multi-stage crushing device, a partition plate is arranged in the interior center of the feeding hopper 311. The motor 319 is arranged on the partition plate. The rolling and crushing rollers 317 are arranged on the two sides of the partition plate. The partition plate strengthens the structural stability of the feeding hopper 311.

[0055] Referring to Figure 3 , a front view of the crushing mechanism 41 in the engineering waste multi-stage crushing device is shown. In combination with Figure 3 and Figure 4As shown, the crushing mechanism 41 in the engineering waste multi-stage crushing device comprises a crushing tooth plate 411, a baffle 414, a first connecting rod 415, a second connecting rod 416, a third connecting rod 417 and a first screening element 422. Two crushing tooth plates 411 are arranged vertically opposite to each other, and the opposite sides of the two crushing tooth plates 411 are provided with crushing teeth 412. One sliding rod 413 is fixedly connected to the side of the crushing tooth plate 411 away from the crushing teeth 412, and the sliding rod 413 is slidably arranged on the supporting rod 212. Two baffles 414 are attached to the two sides of the two crushing tooth plates 411, and the middle part of the baffle 414 is hingedly connected to the first connecting rod 415. A rotating disc is arranged on the driving shaft, and the other end of the first connecting rod 415 is hingedly connected to the rotating disc coaxial with the rotating lug 316. The left and right sides of the baffle 414 are respectively hingedly connected to a second connecting rod 416, and the other end of the second connecting rod 416 is respectively hingedly connected to the sliding rod 413 on the same side. The two second connecting rods 416 are symmetrically arranged about the middle part of the baffle 414. When the motor 319 drives the rotating disc to rotate, the first connecting rod 415 makes a circular motion about the shaft of the motor 319, driving the baffle 414 to move up and down. Since the baffle 414 is hingedly connected to the left and right two second connecting rods 416 through the left and right two sliding rods 413, when the baffle 414 moves upward, it will drive the left and right two sliding rods 413 to move obliquely upward. Since the sliding rod 413 is slidably arranged on the side wall of the base 21, the movement of the sliding rod 413 in the vertical direction is limited, so that the sliding rod 413 can only move horizontally to the center, driving the two crushing tooth plates 411 to move to the center, so that the two crushing tooth plates 411 crush the engineering waste clamped in the middle, realizing the secondary crushing of the engineering waste.

[0056] In another preferred embodiment of the engineering waste multi-stage crushing device, the crushing tooth plate 411 is L-shaped, which can increase the entering area of the engineering waste and prevent the engineering waste from entering from the discharge port and exposing the crushing mechanism 41.

[0057] Further, in another preferred embodiment of the engineering waste multi-stage crushing device, the side of the crushing tooth plate 411 away from the crushing teeth 412 is fixedly connected to a sleeve, and the sliding rod 413 is slidably arranged in the sleeve. When the baffle 414 moves up and down, it drives the sleeve to move horizontally, and the sleeve is sleeved on the sliding rod 413 to move horizontally, improving the stability of the horizontal movement of the crushing tooth plate 411.

[0058] Referring to Figure 5 , a cross-sectional view of the engineering waste multi-stage crushing device in operation is shown. In combination with Figure 4 and Figure 5As shown, further, the first screening member 422 in the engineering waste multi-stage crushing device comprises a third connecting rod 417 coaxially hinged to the slide rod 413 with the second connecting rod 416, the other end of the third connecting rod 417 is hinged to the grinding mechanism 51, two third connecting rods 417 are symmetrically arranged about the baffle 414, the fixed cylinder 418 is horizontally fixed to the third connecting rod 417, the screening plates 421 arranged in the two fixed cylinders 418 abut against each other, the end of the screening plate 421 close to the outer side is connected with the stop block 419, the second spring 420 is sleeved on the screening plate 421, and the second spring 420 is connected between the stop block 419 and the fixed cylinder 418, when the slide rod 413 moves in the horizontal direction, since the other end of the third connecting plate is hinged to the crushing mechanism 41, the third connecting rod 417 will be offset inward or outward with the slide rod 413, so that the screening of the first screening member 422 can be realized.

[0059] In a preferred embodiment of the engineering waste multi-stage crushing device, further, the grinding mechanism 51 comprises a grinding lower pressing plate 511, a grinding plate 512 and a second screening member 513.

[0060] The grinding lower pressing plate 511 is arranged below the crushing mechanism 41, the grinding lower pressing plate 511 is connected to the other end of the third connecting rod 417, the bottom of the grinding lower pressing plate 511 is provided with a grinding feeding port, the second screening member 513 is fixedly connected to the two sides of the grinding lower pressing plate 511 respectively, a grinding base is connected to the bottom of the two second screening members 513, the grinding plate 512 is arranged below the grinding lower pressing plate 511 and on the base 21, and the grinding lower pressing plate 511 can be in grinding contact with the grinding plate 512 when moving downward.

[0061] After the engineering waste is crushed by the crushing mechanism 41, it falls to the grinding lower pressing plate 511 through the first screening member 422, and reaches the grinding plate 512 below through the grinding feeding port, the grinding lower pressing plate 511 moves vertically synchronously with the crushing mechanism through the transmission of the third connecting rod 417, and approaches the grinding plate 512 to crush the engineering waste in three stages.

[0062] Preferably, the second screening member 513 is arranged on both sides of the grinding plate 512, the middle of the grinding plate 512 is high and the two sides are low, the engineering waste moves from the middle to both sides after three-stage crushing, and is output from the second screening member 513 until the requirement is met.

[0063] Further, in a preferred embodiment of the engineering waste multi-stage crushing device, the second screening member 513 is a plurality of vertical rods 514, the plurality of vertical rods 514 are arranged on both sides of the grinding plate 512 at intervals according to the requirement of the engineering waste, and the engineering waste meeting the requirement can roll out of the engineering waste multi-stage crushing device from the screening gap.

[0064] Preferably, in another preferred embodiment of the multi-stage crushing device for engineering waste of the present application, the bottom of the grinding plate 512 is embedded with a limiting piece 516, which is fixed on the base 21, and the limiting piece 516 and the grinding plate 512 are left with a gap in the vertical direction.

[0065] Further, the multi-stage crushing device for engineering waste of the present application is further provided with a third spring 515, one end of which is fixedly connected with the bottom of the grinding plate 512, and the other end is fixedly connected with the bottom of the grinding base. At this time, small pieces of engineering waste can fall through the gaps between the vertical rods 514, while large pieces of engineering waste can be blocked on the grinding plate 512 by the vertical rods 514. Then, in the process of crushing on the grinding plate 512, the repeated deflection of the third connecting rod 417 drives the grinding lower pressing plate 511 to move up and down, and in the process of moving up and down of the grinding lower pressing plate 511, it is convenient to crush the engineering waste falling on the grinding plate 512. After crushing, the grinding plate 512 is bounced up by the third spring 515, so that the crushed engineering waste on the grinding plate 512 is jolted, which facilitates the small particles of engineering waste to fall through the gaps between the vertical rods 514, and the large particles of engineering waste continue to be crushed by the up-and-down movement of the grinding lower pressing plate 511.

[0066] The use method of the multi-stage crushing device for engineering waste of the present application is further described below.

[0067] The engineering waste multi-stage crushing device is placed on the operation platform, the engineering waste is poured into the feeding hopper 311, the engineering waste is crushed by the crushing roller 317 with the rotating crushing teeth 318 in the feeding mechanism 31, and then the engineering waste is intermittently rolled into the discharge port by the rotation of the crushing roller 317, the engineering waste enters the crushing mechanism 41, the rotating disc is driven by the motor 319, the first connecting rod 415 is driven by the rotating disc, the baffle 414 is driven to move up and down, the sliding rod 413 connected with the baffle 414 through the second connecting rod 416 is driven to move horizontally, so as to drive the two opposite crushing tooth plates 411 to move close to and away from each other, and the engineering waste is crushed in two stages, and then the engineering waste is screened by the first screening element 422, the engineering waste with appropriate size is sent into the grinding mechanism 51, the engineering waste enters the second accommodating chamber formed by the grinding plate 512 and the plurality of vertical rods 514 through the grinding lower pressing plate 511, the engineering waste is located on the grinding plate 512, the grinding lower pressing plate 511 is hinged with the sliding rod 413 through the third connecting rod 417, and the engineering waste on the grinding plate 512 is crushed downward by the grinding lower pressing plate 511 due to the inclination of the second connecting rod 416 and the third connecting rod 417, when the engineering waste is crushed, the grinding plate 512 is instantly bounced up due to the arrangement of the third spring 515, and the engineering waste on the grinding plate 512 is also shaken, the engineering waste crushed in three stages and with appropriate size rolls to the plurality of vertical rods 514 on both sides of the grinding plate 512, and then rolls out of the engineering waste multi-stage crushing device through the gaps between the plurality of vertical rods 514, and the multi-stage crushing of the engineering waste is completed.

[0068] The above embodiment of the present application is described in detail in combination with the drawings, and those skilled in the art can make various changes to the present application according to the above description. Therefore, some details in the embodiment should not constitute a limitation on the present application, and the scope of protection of the present application is defined by the appended claims.

Claims

1. An engineered waste material multi-stage crushing device, characterized by, The utility model provides a kind of engineering waste crushing device, including: Base, the support pole is vertically supported on the base; Feed hopper is arranged on the top of the support pole, the inside of the feed hopper is rotatably provided with a rolling roller for crushing the engineering waste, the top of the feed hopper is provided with a feed inlet, and the bottom of the feed hopper is provided with a discharge outlet communicated with the outside; The crushing mechanism is slid through the support pole, the crushing mechanism is arranged below the discharge outlet, the crushing mechanism is vertically provided with two opposite crushing tooth plates, the two crushing tooth plates can press the engineering waste by approaching each other, the first screening element is arranged below the crushing tooth plate, and the first screening element is connected with the crushing tooth plate; The grinding mechanism is arranged below the first screening element, the grinding mechanism is provided with a grinding lower pressing plate connected with the crushing mechanism and synchronous vertical movement, and second screening elements are vertically arranged on both sides of the grinding lower pressing plate; A part of the outer periphery of the rolling roller is provided with a rotary crushing tooth; Further comprising: a driving mechanism for driving the rolling roller, the driving mechanism comprises: a motor, a sector gear, a contact block, a rotating protrusion, a limiting plate, a first spring; The sector gear is coaxially connected with the rolling roller on the outside wall of the feed hopper, and the two sector gears are engaged with each other; The limiting plate is fixedly arranged on the outside wall of the feed hopper close to the sector gear; The first spring is connected between the limiting plate and the sector gear; The contact block is arranged on the outside of the sector gear; The rotating protrusion is rotatably connected to the outside wall of the feed hopper, and the rotating protrusion can abut against the contact block when rotating; The motor is arranged in the inside of the feed hopper, the motor is driven by a driving shaft, the driving shaft penetrates the outside wall of the feed hopper, the rotating protrusion is coaxially rotatable with the driving shaft, the crushing mechanism further comprises a rotating disc fixedly connected with the driving shaft, a first connecting rod hinged with the rotating disc, and a baffle hinged with the other end of the first connecting rod; The rotating disc is arranged on the outside wall of the feed hopper; The first connecting rod is vertically arranged; The baffle is provided with two, and is arranged on both sides of the two crushing tooth plates, two second connecting rods are hinged on each baffle, and the second connecting rods are arranged in an inclined manner; The side away from each other between the two crushing tooth plates is connected with a slide rod, the slide rod penetrates and slides on the support pole, and the end of the corresponding second connecting rod is hinged with the slide rod; The first screening element comprises a third connecting rod, the third connecting rod is coaxially hinged with the second connecting rod on the slide rod, the other end of the third connecting rod is hinged with the grinding mechanism, and the two third connecting rods are symmetrically arranged about the baffle;The grinding mechanism comprises a grinding base and a grinding plate; The grinding lower pressing plate is hinged with the third connecting rod, the bottom of the grinding lower pressing plate is provided with a grinding inlet, the second screening elements are fixedly connected with the two sides of the grinding lower pressing plate respectively, the grinding base is connected with the bottom of the two second screening elements, the grinding plate is arranged on the base, the grinding plate is arranged below the grinding lower pressing plate, and the grinding lower pressing plate can be in grinding contact with the grinding plate when moving downward. ​ 2. The engineered waste multi-stage shredder of claim 1, wherein, The driving mechanism is arranged on the sidewall of the feeding hopper.

3. The engineered waste multi-stage shredder of claim 1, wherein, The first screening member further comprises a fixed cylinder, a screening plate, a stopper and a second spring. The fixed cylinder is horizontally fixed on the third connecting rod. The screening plate is slidably arranged in the fixed cylinder, and two screening plates abut each other below the crushing tooth plate. The second spring is connected between the stopper and the fixed cylinder.

4. The engineered waste multi-stage shredder of claim 1, wherein, A limiting member is arranged on the base and embedded in the bottom of the grinding plate.

5. The engineered waste material multi-stage crushing device of claim 1, wherein, The second screening member comprises a plurality of vertical rods, one end of each vertical rod is fixedly connected with the grinding lower pressing plate, and the other end is fixedly connected with the grinding base.

6. The engineered waste multi-stage shredder of claim 4, wherein, The grinding mechanism further comprises a third spring. One end of the third spring is fixedly connected with the bottom of the grinding plate, and the other end is fixedly connected with the grinding base. The limiting member and the grinding plate leave a gap in the vertical direction.

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