Engineering muck recycling device with multi-section screening and material separation functions

Abstract

The invention relates to the technical field of muck recycling treatment, and discloses a multi-section type screening and material separating engineering muck recycling device which comprises a first supporting frame, a second supporting frame and a plurality of annularly-distributed connecting rods installed between the first supporting frame and the second supporting frame. A first screening barrel is rotationally arranged on the inner walls of the first supporting frame and the second supporting frame, a plurality of connecting blocks are installed on the outer wall of the first screening barrel, and the connecting blocks are fixedly connected with a second screening barrel attached to the side walls of the first supporting frame and the second supporting frame; muck blocked in screen holes of the first screening barrel and the second screening barrel can be cleaned through the high-pressure air injection assembly, and the reciprocating flow dividing assembly can intermittently divide high-pressure air flow in the reciprocating swing process, so that the impact assembly can be intermittently driven by the high-pressure air flow; and the impact assembly can intermittently impact and crush the muck, so that the bonded small muck can be crushed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slag recycling, and particularly relates to a multi-section screening and material separation engineering slag recycling device. BACKGROUND

[0002] Engineering slag is mixed waste generated in engineering construction, demolition and reconstruction, road construction and other activities, and in order to realize resource recycling and reduce environmental pollution, the engineering slag needs to be recycled and processed.

[0003] In the engineering slag recycling process, the slag is first crushed to a specified particle size by a crusher, and then different specifications of recycled aggregates are separated by a screening mechanism. These recycled aggregates of different particle sizes can be adapted to various application scenarios such as roadbed filling and building material production according to their own performance.

[0004] However, in the actual screening process, due to incomplete crushing of the slag, part of the slag remains in the form of bonded small groups. Such bonded small slag not only interferes with the particle size grading accuracy, causing different specifications of aggregates to be mixed, affecting the quality of subsequent recycling, but also easily gets stuck in the screen holes of the screening mechanism, causing screen hole blockage, thereby reducing the effective screening area and the overall screening efficiency, and increasing the frequency of equipment cleaning and maintenance.

[0005] Therefore, the present application provides a multi-section screening and material separation engineering slag recycling device to solve the problems in the above background. SUMMARY

[0006] The present application aims to provide a multi-section screening and material separation engineering slag recycling device to solve the problems in the above background.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0008] A multi-section screening and material separation engineering slag recycling device, comprising a first support frame, a second support frame and a plurality of connection rods arranged in a ring shape and installed between the first support frame and the second support frame, wherein the inner wall of the first support frame and the second support frame is rotatably provided with a first screening cylinder, the outer wall of the first screening cylinder is provided with a plurality of connection blocks, the connection blocks are fixedly connected with a second screening cylinder which is attached to the side wall of the first support frame and the second support frame, and a fixed cylinder located in the first screening cylinder is installed between the first support frame and the second support frame, further comprising:

[0009] An impact assembly is arranged on the fixed cylinder and used for impact crushing of the slag in the first screening cylinder.

[0010] The impact assembly comprises a sliding cavity formed in the fixed cylinder, a sliding plate is slidably arranged in the sliding cavity, the sliding plate is connected with the sliding cavity through a first elastic element, the top of the sliding plate is provided with two top rods which are symmetrically distributed and are in sliding fit with the fixed cylinder, the top end of the top rod is provided with an arc-shaped plate, the bottom of the sliding plate is provided with a bottom rod which is in sliding fit with the fixed cylinder, and the bottom of the fixed cylinder is provided with an inner cavity, and an impact plate connected with the bottom rod is slidably arranged in the inner cavity.

[0011] A high-pressure jet assembly is arranged between the first support frame and the second support frame and is in fit with the outer wall of the second screening cylinder, and is used for generating a high-pressure impact air flow.

[0012] A reciprocating shunt assembly is arranged on the fixed cylinder and is used for reciprocating shunting the high-pressure impact air flow generated by the high-pressure jet assembly.

[0013] A rotating assembly is arranged on the first support frame and is used for driving the first screening cylinder and the second screening cylinder to rotate.

[0014] As a preferred technical scheme of the present application, the high-pressure jet assembly comprises a jet frame which is arranged between the first support frame and the second support frame and is in fit with the outer wall of the second screening cylinder, the jet frame is located at the top of the first support frame and the second support frame, the bottom of the jet frame is provided with a jet port, a plurality of jet holes are arranged in the jet port, and an air pump is arranged on the jet frame and is in communication with the jet holes.

[0015] As a preferred technical scheme of the present application, the rotating assembly comprises a gear ring which is arranged on the first screening cylinder and is located at one end of the first support frame, a plurality of rotating shafts are rotatably arranged on the first support frame and are in annular distribution, a gear is arranged on the rotating shaft and is in meshing fit with the gear ring, a driving frame is arranged at the bottom of the first support frame, and a driving element is arranged on the driving frame and is connected with the rotating shaft.

[0016] As a preferred technical scheme of the present application, the reciprocating shunt assembly comprises a movable shaft which is rotatably arranged on the fixed cylinder and is in coincidence with the axis of the first screening cylinder, movable frames are arranged at both ends of the movable shaft, a shunt plate is arranged between the two movable frames and is located in the first screening cylinder, an oscillation groove is formed at the top of the movable frame, an oscillation column is slidably arranged in the oscillation groove, the oscillation column is fixedly connected with one end of an oscillation frame, and the other end of the oscillation frame is connected with the rotating shaft.

[0017] As a preferred technical scheme of the present application, the bottom of the fixed cylinder is provided with a baffle on both sides.

[0018] As a preferred technical scheme of the present application, a plurality of protrusions are arranged on the arc-shaped plate.

[0019] As a preferred technical scheme of the present application, the bottom of the movable frame is provided with friction assemblies on both sides, including a friction frame, a plurality of mounting shafts are rotatably arranged on the friction frame, and friction rollers are mounted on the mounting shafts.

[0020] As a preferred technical scheme of the present application, the first support frame and the second support frame are connected with support assemblies, including a base, two symmetrically distributed support seats are mounted on the base, a first support shaft connected with the first support frame is rotatably arranged on the top of the support seat, second support shafts are mounted on both sides of the second support frame, one end of the second support shaft is hingedly connected with a telescopic piece, and the other end of the telescopic piece is hingedly connected with a fixed seat mounted on the base.

[0021] As a preferred technical scheme of the present application, the second support frame is provided with a first material guide frame and a second material guide frame respectively aligned with the bottom of the first screening drum and the second screening drum.

[0022] The present application has the following advantages: the high-pressure air jet assembly can clean the muck blocked in the screen holes of the first screening drum and the second screening drum, thereby ensuring the screening effect, and the reciprocating flow distribution assembly can intermittently distribute the high-pressure airflow during reciprocating swing, thereby driving the impact assembly intermittently by the intermittent high-pressure airflow, so that the impact assembly can intermittently impact and crush the muck, thereby crushing the small muck, and the reciprocating flow distribution assembly also drives the friction assembly to roll along the inner wall of the first screening drum during reciprocating swing, thereby rubbing with the muck on the inner wall of the first screening drum, thereby improving the crushing effect of the muck and reducing the phenomenon of small muck adhesion. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of a multi-section screening and material separation engineering muck recycling device.

[0024] Figure 2 It is a structural schematic view of a rotating assembly in a multi-section screening and material separation engineering muck recycling device.

[0025] Figure 3 It is a structural schematic view of the inside of a first screening drum and a second screening drum in a multi-section screening and material separation engineering muck recycling device.

[0026] Figure 4 It is a structural schematic view of a reciprocating flow distribution assembly in a multi-section screening and material separation engineering muck recycling device.

[0027] Figure 5 It is a structure diagram of an impact assembly in a multi-section screening and material separation engineering sludge recycling device.

[0028] Figure 6 It is a sectional view diagram of the inside of a fixed cylinder in a multi-section screening and material separation engineering sludge recycling device.

[0029] Figure 7 It is a structure diagram of a high-pressure air jet assembly in a multi-section screening and material separation engineering sludge recycling device.

[0030] Figure 8 It is Figure 3 It is a local enlarged view of A in the middle.

[0031] Figure 9 It is a structure diagram of a friction assembly in a multi-section screening and material separation engineering sludge recycling device.

[0032] Figure 10 It is a structure diagram of a support assembly in a multi-section screening and material separation engineering sludge recycling device.

[0033] In the figure: 101, first support frame; 102, second support frame; 103, connecting rod; 104, first screening cylinder; 105, second screening cylinder; 106, connecting block; 107, fixed cylinder; 108, first material guide frame; 109, second material guide frame; 2, rotating assembly; 201, gear ring; 202, rotating shaft; 203, gear; 204, driving piece; 205, driving frame; 3, impact assembly; 301, sliding cavity; 302, sliding plate; 303, top rod; 304, arc plate; 305, protrusion; 306, first elastic piece; 307, inner cavity; 308, bottom rod; 309, impact plate; 310, baffle; 4, reciprocating shunt assembly; 401, movable shaft; 402, movable frame; 403, swing groove; 404, swing column; 405, swing frame; 406, shunt plate; 5, friction assembly; 501, friction frame; 502, mounting shaft; 503, friction roller; 504, guide groove; 505, guide rod; 506, second elastic piece; 6, high-pressure air jet assembly; 601, air jet frame; 602, air jet port; 603, air jet hole; 604, air pump; 7, support assembly; 701, support seat; 702, first support shaft; 703, second support shaft; 704, telescopic piece; 705, fixed seat; 706, base. DETAILED DESCRIPTION

[0034] The technical solutions of the present application will be further described in detail below in combination with specific embodiments.

[0035] Please refer to Figures 1-10The utility model provides a kind of multi-section screening and material separation engineering muck recovery device, including first support frame 101, second support frame 102 and install between first support frame 101 and second support frame 102 several ring distribution connecting rod 103, the inner wall of the first support frame 101 and second support frame 102 is rotationally arranged with first screening cylinder 104, the outer wall of first screening cylinder 104 is installed with several connecting blocks 106, connecting block 106 is fixedly connected with the second screening cylinder 105 that is attached with the side wall of first support frame 101 and second support frame 102, the fixed cylinder 107 in first screening cylinder 104 is installed between the first support frame 101 and second support frame 102, further include:

[0036] Impact assembly 3 is arranged on fixed cylinder 107, for impacting and crushing muck in first screening cylinder 104;

[0037] High-pressure air jet assembly 6 is arranged between first support frame 101 and second support frame 102 and is attached with the outer wall of second screening cylinder 105, for generating high-pressure impact airflow;

[0038] Reciprocating flow splitting assembly 4 is arranged on fixed cylinder 107, for reciprocating flow splitting of high-pressure impact airflow generated by high-pressure air jet assembly 6;

[0039] Rotary assembly 2 is arranged on first support frame 101, for driving first screening cylinder 104 and second screening cylinder 105 to rotate.

[0040] In one case of the embodiment, please refer to Figures 3-6 Impact assembly 3 includes slide cavity 301 opened in fixed cylinder 107, slide plate 302 is slidably arranged in slide cavity 301, slide plate 302 is connected with slide cavity 301 by first elastic member 306, the top of slide plate 302 is provided with two symmetrical top rods 303 that are slidably connected with fixed cylinder 107, the top end of top rod 303 is provided with arc plate 304, the bottom of slide plate 302 is provided with bottom rod 308 that is slidably connected with fixed cylinder 107, and the bottom of fixed cylinder 107 is provided with inner cavity 307, impact plate 309 is slidably arranged in inner cavity 307 and connected with bottom rod 308.

[0041] First elastic member 306 is located between the bottom end of slide cavity 301 and slide plate 302, and first elastic member 306 is in compression state, under the elastic force of first elastic member 306, slide plate 302 is located at the top end of slide cavity 301, at this time, top rod 303 is in the state of extension, and impact plate 309 is also completely located in inner cavity 307.

[0042] During the process of rotary screening of the first screening drum 104 and the second screening drum 105, the high-pressure airflow generated by the high-pressure impact assembly 3 blows into the first screening drum 104 and the second screening drum 105, when the reciprocating shunt assembly 4 deviates from the airflow position, the high-pressure airflow pushes the arc-shaped plate 304 to descend, the arc-shaped plate 304 drives the sliding plate 302 to slide down along the sliding cavity 301 through the top rod 303, so as to drive the impact plate 309 to descend through the bottom rod 308 and impact and crush the slag at the bottom of the first screening drum 104, and when the reciprocating shunt assembly 4 is opposite to the airflow position, the shunt plate 406 disperses the blown airflow to both sides, so that the arc-shaped plate 304 is not impacted by the airflow, under the action of the first elastic member 306, the sliding plate 302 resets, and the arc-shaped plate 304 and the impact plate 309 are reset through the top rod 303 and the bottom rod 308 respectively, so that the above process can be repeated, that is, the impact plate 309 can reciprocally impact and crush the small slag bonded together.

[0043] It should be noted that the specific structure of the first elastic member 306 is not limited, in the embodiment, the first elastic member 306 is provided as a spring.

[0044] Further, the bottom of the fixed drum 107 is provided with a baffle 310 on both sides.

[0045] The baffle 310 and the inner wall of the first screening drum 104 are spaced apart, so that when the slag in the first screening drum 104 rolls to the bottom of the fixed drum 107 (that is, the impact crushing area of the impact plate 309), the slag can be limited, so that too much slag enters the impact crushing area and affects the crushing effect.

[0046] Further, the arc-shaped plate 304 is provided with a plurality of protrusions 305.

[0047] Due to the rolling of the first screening drum 104, part of the slag is thrown up and falls on the arc-shaped plate 304 under the action of friction and centrifugal force, and the slag can be crushed by colliding with the protrusions 305 on the arc-shaped plate 304.

[0048] In one case of the embodiment, please refer to Figure 1 and Figure 7 The high-pressure jet assembly 6 includes a jet frame 601 installed between the first support frame 101 and the second support frame 102 and attached to the surface wall of the second screening drum 105, the jet frame 601 is located at the top of the first support frame 101 and the second support frame 102, the bottom of the jet frame 601 is provided with a jet opening 602, a plurality of jet holes 603 are arranged in the jet opening 602, and a gas pump 604 is arranged on the jet frame 601 and communicates with the jet holes 603.

[0049] In the process of rolling screening of the slag by the first screening drum 104 and the second screening drum 105, the air pump 604 continuously generates the high-pressure airflow which is sprayed from the air injection hole 603 and is blown to the axis direction of the first screening drum 104 through the air injection port 602, wherein the screen holes on the first screening drum 104 and the second screening drum 105 are correspondingly arranged, so that when the screen holes on the first screening drum 104 and the second screening drum 105 rotate to the position of the air injection port 602, the high-pressure airflow can sequentially pass through the second screening drum 105, the first screening drum 104 and then enter the inside of the first screening drum 104, so as to facilitate the cleaning of the slag blocked on the first screening drum 104 and the second screening drum 105, and the sprayed high-pressure airflow can also drive the impact assembly 3.

[0050] In one case of the embodiment, referring to Figure 2 , the rotating assembly 2 comprises a gear ring 201 which is installed on the first screening drum 104 and located at one end of the first support frame 101, a plurality of rotating shafts 202 which are annularly arranged and are rotatably installed on the first support frame 101, a gear 203 which is installed on the rotating shaft 202 and is engaged with the gear ring 201, and a driving frame 205 which is installed at the bottom of the first support frame 101 and is connected with the driving member 204.

[0051] In the process of screening the slag, the rotating shaft 202 connected with the driving member 204 is driven to rotate by the driving member 204, so as to drive the gear 203 on the rotating shaft 202 to synchronously rotate, so that the gear 203 can drive the gear ring 201 to rotate, thereby driving the first screening drum 104 to rotate, and the second screening drum 105 will also synchronously rotate under the action of the connecting block 106, thereby facilitating the rolling screening of the slag.

[0052] It should be noted that the specific structure of the driving member 204 is not limited, and in the embodiment, the driving member 204 is set as a servo motor.

[0053] In one case of the embodiment, referring to Figure 3 , Figure 4 and Figure 8 , the reciprocating shunt assembly 4 comprises a movable shaft 401 which is rotatably arranged on the fixed drum 107 and coincides with the axis of the first screening drum 104, movable frames 402 which are installed at both ends of the movable shaft 401, a shunt plate 406 which is arranged between the two movable frames 402 and is located in the first screening drum 104, an oscillation groove 403 which is formed at the top of the movable frame 402, an oscillation column 404 which is slidably arranged in the oscillation groove 403, an oscillation frame 405 which is fixedly connected with one end of the oscillation column 404, and the other end of the oscillation frame 405 is connected with the rotating shaft 202.

[0054] In the process of driving the first screening cylinder 104 and the second screening cylinder 105 to rotate by the rotating assembly 2, the rotating gear ring 201 and the gear 203 can drive the rotating shaft 202 at the top of the first support frame 101 to rotate, so that the rotating shaft 202 can drive the swing frame 405 to rotate, and the swing column 404 and the swing groove 403 can drive the movable frame 402 to reciprocating swing around the movable shaft 401, so as to drive the flow distribution plate 406 to reciprocating swing left and right.

[0055] When the movable frame 402 is at the leftmost end of the reciprocating swing, the movable frame 402 is in a vertical state, and the flow distribution plate 406 is located at the top of the arc-shaped plate 304, that is, between the arc-shaped plate 304 and the air jet 602, so as to block the high-pressure airflow jetted from the air jet 602, so that the high-pressure airflow entering the first screening cylinder 104 is distributed to both sides of the flow distribution plate 406. When the movable frame 402 is at the rightmost end of the reciprocating swing, the movable frame 402 is in an inclined state, and the flow distribution plate 406 deviates from the high-pressure airflow, so that the high-pressure airflow jetted from the air jet 602 directly blows to the arc-shaped plate 304, so as to drive the arc-shaped plate 304 to move, and further drive the impact assembly 3 to impact and crush the slag.

[0056] With the reciprocating swing of the flow distribution plate 406, the high-pressure airflow can intermittently impact the arc-shaped plate 304, so as to drive the impact assembly 3 to intermittently impact and crush the slag.

[0057] In one case of the embodiment, please refer to Figure 3 、 Figure 4 and Figure 9 , the bottom of the movable frame 402 is provided with a friction assembly 5, which includes a friction frame 501, a plurality of installation shafts 502 rotatably arranged on the friction frame 501, and a plurality of friction rollers 503 mounted on the installation shafts 502. The bottom of the movable frame 402 is provided with a guide groove 504, the guide groove 504 is slidably connected with a guide rod 505, the guide rod 505 is connected with the friction frame 501, and the guide groove 504 is provided with a second elastic member 506 connected with the guide rod 505.

[0058] In the process of reciprocating swing of the movable frame 402 around the movable shaft 401, the movable frame 402 also drives the guide rod 505 in the guide groove 504 to swing in an arc shape, so that the friction rollers 503 on the friction frame 501 roll along the inner wall of the first screening cylinder 104, so as to roll and rub with the slag rolling in the first screening cylinder 104, thereby improving the crushing effect of the slag and reducing the phenomenon of small slag adhesion. Through the elastic force of the second elastic member 506 on the guide rod 505, the friction rollers 503 can maintain a certain extrusion force with the slag on the inner wall of the first screening cylinder 104, so as to ensure the friction force between the slag and the friction rollers 503, thereby facilitating the friction crushing.

[0059] It should be noted that the specific structure of the second elastic member 506 is not limited, and in the embodiment, the second elastic member 506 is provided as a spring.

[0060] In one case of the embodiment, referring to Figure 1 and Figure 10 , the first support frame 101 and the second support frame 102 are connected with a support assembly 7, which includes a base 706, two symmetrical support seats 701 are installed on the base 706, a first support shaft 702 connected with the first support frame 101 is rotatably arranged on the top of the support seat 701, a second support shaft 703 is installed on the two sides of the second support frame 102, one end of the second support shaft 703 is hingedly connected with a telescopic member 704, and the other end of the telescopic member 704 is hingedly connected with a fixed seat 705, which is installed on the base 706.

[0061] In the process of screening the slag, the inclination angle of the first screening drum 104 and the second screening drum 105 can be adjusted by the telescopic movement of the telescopic member 704 and the cooperation of the support seat 701, so as to facilitate the adjustment of the moving speed of the slag and ensure that the slag is fully screened.

[0062] It should be noted that the specific structure of the telescopic member 704 is not limited, and in the embodiment, the telescopic member 704 is provided as a hydraulic rod.

[0063] In one case of the embodiment, referring to Figure 10 , the second support frame 102 is installed with a first material guide frame 108 and a second material guide frame 109, which are respectively aligned with the bottom of the first screening drum 104 and the second screening drum 105.

[0064] The slag screened by the first screening drum 104 enters the second screening drum 105 for screening, the residual slag in the first screening drum 104 is discharged from the first material guide frame 108, the residual slag in the second screening drum 105 is discharged from the second material guide frame 109, and the slag screened by the second screening drum 105 is discharged downward from the screen hole, wherein the aggregate of each particle size discharged is collected and stored by the placed aggregate tank.

[0065] The first screening drum 104 and the second screening drum 105 are supported by the support assembly 7, and the screening inclination angle of the first screening drum 104 and the second screening drum 105 can be adjusted, which facilitates the movement and screening of the slag. In the process of screening the slag, the slag is poured into the first screening drum 104 from the right end of the first screening drum 104, then the first screening drum 104 and the second screening drum 105 are driven to rotate synchronously by the rotating assembly 2, so as to roll and screen the slag, until the slag is discharged from the left end of the first screening drum 104 and the second screening drum 105, and the screening process is completed.

[0066] During the screening process, the high-pressure air jet assembly 6 continuously sprays high-pressure air flow towards the axis direction of the first screening drum 104, and the high-pressure air flow pushes the slag clogging in the screen holes of the first screening drum 104 and the second screening drum 105 out, so as to avoid the clogging and affect the screening effect, and the rotating assembly 2 also drives the reciprocating shunting assembly 4 to reciprocate, when the reciprocating shunting assembly 4 deviates from the air flow, the high-pressure air flow pushes the impact assembly 3, so that the impact assembly 3 impacts the slag at the bottom of the first screening drum 104, so that the small slag clogging together can be broken during the screening process, so as to improve the screening classification accuracy of the slag, and when the reciprocating shunting assembly 4 is opposite to the high-pressure air jet assembly 6, the shunting plate 406 diffuses the high-pressure air flow to both sides, and the impact assembly 3 is automatically reset, so that the impact assembly 3 can reciprocate the slag by shunting the high-pressure air flow, and during the reciprocating of the reciprocating shunting assembly 4, the friction assembly 5 also rubs with the slag on the inner wall of the first screening drum 104, so as to improve the breaking effect of the slag and reduce the clogging phenomenon of the small slag.

[0067] The power supply and control of the electrical equipment in the present application are all prior art, and will not be described in detail here. The control of each component can be realized by using the PLC controller disclosed in the prior art, and the model and circuit connection of each component are not specifically limited. The electrical equipment involved is all prior art, and those skilled in the art can realize it without further description. The content protected by the present application does not involve the improvement of software and method.

[0068] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0069] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A multi-section screening and material separation engineering sludge recycling device, comprising a first support frame, a second support frame and a plurality of connecting rods arranged in a ring shape and installed between the first support frame and the second support frame, characterized in that, The inner wall of the first support frame and the second support frame is rotationally provided with a first screening cylinder, the outer wall of the first screening cylinder is provided with a plurality of connecting blocks, the connecting blocks are fixedly connected with a second screening cylinder which is attached to the side wall of the first support frame and the second support frame, a fixed cylinder located in the first screening cylinder is arranged between the first support frame and the second support frame, and the fixed cylinder further comprises: An impact assembly is arranged on the fixed cylinder and used for impacting and crushing the muck in the first screening cylinder. The impact assembly comprises a sliding cavity formed in the fixed cylinder, a sliding plate is slidably arranged in the sliding cavity, the sliding plate is connected with the sliding cavity through a first elastic member, the top of the sliding plate is provided with two top rods which are symmetrically distributed and are in sliding cooperation with the fixed cylinder, the top end of each top rod is provided with an arc-shaped plate, the bottom of the sliding plate is provided with a bottom rod which is in sliding cooperation with the fixed cylinder, and the bottom of the fixed cylinder is provided with an inner cavity, an impact plate connected with the bottom rod is slidably arranged in the inner cavity. A high-pressure air jet assembly is arranged between the first support frame and the second support frame and is attached to the outer wall of the second screening cylinder, and is used for generating a high-pressure impact air flow. A reciprocating flow distribution assembly is arranged on the fixed cylinder and is used for reciprocally distributing the high-pressure impact air flow generated by the high-pressure air jet assembly. A rotating assembly is arranged on the first support frame and is used for driving the first screening cylinder and the second screening cylinder to rotate.

2. A multi-stage screening and material separation engineered sludge recovery device according to claim 1, wherein, The high-pressure air jet assembly comprises an air jet frame which is arranged between the first support frame and the second support frame and is attached to the surface wall of the second screening cylinder, the air jet frame is located at the top of the first support frame and the second support frame, the bottom of the air jet frame is provided with an air jet opening, a plurality of air jet holes are arranged in the air jet opening, and an air pump which is in communication with the air jet holes is arranged on the air jet frame.

3. A multi-stage screening and material separation engineered sludge recovery device according to claim 2, wherein, The rotating assembly comprises a gear ring which is arranged on the first screening cylinder and is located at one end of the first support frame, a plurality of rotating shafts which are arranged in a ring shape are rotationally arranged on the first support frame, a gear which is in engagement with the gear ring is arranged on each rotating shaft, and a driving frame is arranged at the bottom of the first support frame, a driving member which is connected with the rotating shafts is arranged on the driving frame.

4. A multi-stage screening and material separation engineered sludge recovery device according to claim 3, wherein, The reciprocating flow distribution assembly comprises a movable shaft which is rotationally arranged on the fixed cylinder and is coincident with the axis of the first screening cylinder, movable frames are arranged at both ends of the movable shaft, a flow distribution plate which is located in the first screening cylinder is arranged between the two movable frames, an oscillation groove is formed at the top of each movable frame, an oscillation column is slidably arranged in each oscillation groove, one end of the oscillation column is fixedly connected with an oscillation frame, and the other end of the oscillation frame is connected with the rotating shaft.

5. The multi-stage screening and material separating engineered sludge recycling device according to claim 1, characterized in that, The bottom of the fixed cylinder is provided with baffles on both sides.

6. A multi-stage screening and material separation engineered sludge recycling device according to claim 1, characterized in that, A plurality of protrusions are arranged on the arc-shaped plate.

7. A multi-stage screening and material separation engineered sludge recovery device according to claim 4, wherein, The bottom of each movable frame is provided with a friction assembly, the friction assembly comprises a friction frame, a plurality of mounting shafts are rotationally arranged on the friction frame, a friction roller is arranged on each mounting shaft, guide grooves are formed at the bottom of each movable frame on both sides, guide rods are slidably connected with the guide grooves, the guide rods are connected with the friction frame, and a second elastic member which is connected with the guide rods is arranged in each guide groove.

8. The multi-stage screening and material separating engineered sludge recycling device according to claim 1, characterized in that, The first support frame and the second support frame are connected with a support assembly, which comprises a base, two symmetrically distributed support seats mounted on the base, a first support shaft connected with the first support frame and rotatably arranged on the top of the support seat, and a second support shaft mounted on the two sides of the second support frame, one end of which is hingedly connected with a telescopic piece, and the other end of the telescopic piece is hingedly connected with a fixing seat mounted on the base.

9. The multi-stage screening and material separating engineered sludge recycling device according to claim 1, characterized in that, First and second material guide frames are mounted on the second support frame and respectively aligned with the bottom of the first and second screening drums.

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