A screening device for waste recycling concrete and a method of using the same

Abstract

The application relates to the technical field of waste regeneration, in particular to a screening device for waste regeneration concrete and a use method thereof, which comprises a screening cylinder, the top of the screening cylinder is provided with an inlet. The screening device for waste regeneration concrete and the use method thereof have the advantages that the top edge of the rotating inner cylinder is separated by ring plates and a cylinder wall, concrete is prevented from directly contacting the top of the inner cylinder when being poured into the screening cylinder, and part of the gravel is broken out, the use safety is better, the concrete blocks are blocked by the three-pronged rods during the falling process, and fall to the next layer of three-pronged rods through the gaps between the three-pronged rods until falling to the bottom, the falling concrete blocks collide with the three-pronged rods in disorder in the above process, part of the coagulated concrete and the stone blocks are scattered, different wastes can be separated by the user, fine recycling can be carried out, and the concrete blocks can be better broken and crushed along the sharp edges of the three-pronged rods.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste recycling, in particular to a screening device for waste recycling concrete and a use method thereof. BACKGROUND

[0002] The recycled concrete is a new concrete prepared by adding cement and gravel in a certain proportion after the waste concrete blocks are crushed, screened and washed. The use of recycled concrete formed by recycling the waste concrete blocks can reduce the exploitation of natural stone and the damage to the natural environment, and can also treat the construction waste formed after the building is demolished. The use of recycled concrete can achieve the effects of energy saving and environmental protection.

[0003] The existing patent (publication number: CN114570634A) discloses an energy-saving and environment-friendly waste recycling concrete screening device, which comprises a rack, a screening barrel is rotatably installed on the rack through a rotating shaft, a first through hole is formed in the side wall of the screening barrel, a synchronous barrel is rotatably connected to the rack, the synchronous barrel is sleeved outside the screening barrel, and a second through hole corresponding to the first through hole is formed in the side wall of the synchronous barrel; the diameter of the screening barrel is smaller than that of the synchronous barrel, and the screening barrel and the synchronous barrel are eccentrically arranged, one side of the screening barrel forms a screening zone, and the inner wall of the synchronous barrel is attached to the lower part of the one side of the screening barrel; the first through hole at the lower part of the screening zone intersects with the corresponding second through hole on the synchronous barrel; the screening barrel and the synchronous barrel rotate at the same angular velocity. The above-mentioned screening device mainly uses a horizontal and perforated screening cylinder to screen the treated concrete waste during rolling. However, it can only be screened into two categories according to a single standard during operation, has great use limitations, and is not convenient for rapid treatment of concrete blocks of different sizes.

[0004] In view of this, a waste recycling concrete screening device and a use method thereof are provided. SUMMARY

[0005] The present application aims to provide a waste recycling concrete screening device and a use method thereof to solve the problem of being able to only be screened into two categories according to a single standard during operation, having great use limitations, and being inconvenient for rapid treatment of concrete blocks of different sizes. To achieve the above-mentioned purpose, the present application provides the following technical scheme: a waste recycling concrete screening device, comprising a screening cylinder, the top of the screening cylinder is provided with an inlet, and the left side of the screening cylinder is provided with a conveyor belt corresponding to the inlet, the lower side of the screening cylinder is provided with a base, and the screening cylinder and the conveyor belt are both installed on the base through a support.

[0006] The bottom of the screening cylinder is fixedly installed with a motor, and a screening device is arranged in the screening cylinder and driven by the motor.

[0007] Preferably, the sizer comprises a frustum fixedly arranged on the inner bottom wall of the screening drum, the axis of the frustum is rotationally connected with a shaft column, the bottom end of the shaft column penetrates the frustum and the screening drum and is connected with the rotating shaft of the motor, the surface of the shaft column is fixedly connected with a plurality of groups of triangular rods, and each group of triangular rods is three, and the adjacent two groups of triangular rods are staggered.

[0008] The inner wall of the inner cylinder is fixedly connected with the triangular rods, the top edge of the screening drum is fixedly installed with a ring plate, and the ring plate is arranged towards the inside of the screening drum, the bottom of the ring plate is fixedly connected with a cylinder surrounding corresponding to the inner cylinder, and the cylinder surrounding is arranged in an annular structure matched with the inner cylinder.

[0009] A primary leakage hole is formed in the bottom of the screening drum.

[0010] A plurality of multi-stage leakage devices are arranged on the inner cylinder and the screening drum.

[0011] Preferably, the multi-stage leakage device comprises four wall grooves formed on the inner side wall of the screening drum, the four wall grooves are vertically arranged and arranged in an annular array along the screening drum, the groove depths of the four wall grooves are 1:2:3:4, and the four wall grooves are progressively arranged according to the groove depths.

[0012] A secondary leakage opening is formed on the upper side of the wall groove, and the secondary leakage opening penetrates the screening drum and communicates with the outside.

[0013] The side surface of the inner cylinder is fixedly connected with a steel sheet matched with the wall groove, and the steel sheet is arranged in a spiral structure.

[0014] The screening drum, the ring plate and the cylinder surrounding are provided with a reflux device matched with the steel sheet.

[0015] Preferably, the reflux device comprises four reflux grooves formed on the inner side wall of the screening drum, and the four reflux grooves are arranged at intervals between the four wall grooves.

[0016] The groove depth ratio between the reflux groove and the deepest wall groove is 5:4.

[0017] A clamping groove is formed in the bottom of the reflux groove, and the clamping groove is arranged in a U-shaped structure, a triangular shell is slidably connected in the clamping groove, a spring is arranged in the triangular shell, the two ends of the spring are respectively connected to the inner wall of the triangular shell and the bottom wall of the reflux groove, and the spring pushes the triangular shell upward.

[0018] A notch corresponding to the reflux groove is formed in the cylinder surrounding, and a guide plate is fixedly installed at the top end of the reflux groove, and the plate surface of the guide plate relative to one side of the reflux groove is arranged as an inclined surface corresponding to the notch.

[0019] Preferably, the face of the triangular rod towards the upper side is a prismatic face.

[0020] Preferably, the frustum is connected with the screening cylinder by bolts.

[0021] Preferably, the bottom edge of the steel sheet is rounded.

[0022] A method for using a waste recycling concrete screening device, comprising the following steps:

[0023] S1, starting the motor to drive the shaft column, the three-pronged rod and the inner cylinder to rotate, and using the conveyor belt to pour the processed concrete into the inlet at the top of the screening cylinder;

[0024] S2, the concrete enters the inner cylinder through the ring plate and the cylinder wall, and is scattered by the rotating three-pronged rod, wherein the powder and slag directly pass through the three-pronged rod and fall to the bottom of the screening cylinder, and are scattered to the surrounding along the frustum, and are discharged through the first leakage hole, wherein the concrete blocks are blocked by the three-pronged rod during falling and fall to the next layer of three-pronged rod along the gap of the three-pronged rod, until falling to the bottom, and the falling concrete blocks collide with each other in disorder by the staggered three-pronged rod, so that part of the coagulated concrete and stone are scattered;

[0025] S3, after the concrete blocks and stones that cannot be broken fall to the bottom of the inner cylinder, they roll to the space between the inner cylinder and the screening cylinder along the frustum, and are driven to move in a circle by the steel sheet on the inner cylinder, when the wall groove corresponding to the size of the concrete blocks and stones is rotated, the materials accumulated on the frustum are pushed into the wall groove, and cannot move in a circle, at this time, with the movement of the steel sheet, the steel sheet gradually cuts into the concrete blocks and stones along one side, and pushes the concrete blocks and stones along the wall groove upward by the track formed by the steel sheet, until the concrete blocks and stones are aligned with the second leakage hole and are discharged;

[0026] S4, during the screening process, the concrete blocks larger than the receiving range of all wall grooves are pushed into larger reflux grooves, with the movement of the steel sheet, the steel sheet gradually cuts into the concrete blocks along one side, and pushes the concrete blocks along the reflux groove upward by the track formed by the steel sheet, until the concrete blocks contact the guide plate and enter the gap and the inner cylinder again, and are collided with the three-pronged rod again, so that the too large concrete blocks are broken by reflux.

[0027] Compared with the prior art, the present application has the following advantages:

[0028] In the present application, the top edge of the rotating inner cylinder is separated by the ring plate and the cylinder wall, so that the concrete poured into the screening cylinder does not directly contact the top of the inner cylinder, and part of the gravel is broken out, which has better use safety.

[0029] In the application, the concrete blocks are blocked by the three-pronged rods during falling, and fall to the next layer of three-pronged rods through the gaps between the three-pronged rods until falling to the bottom. During the above process, the falling concrete blocks collide with each other in disorder by using the staggered three-pronged rods, so as to scatter part of the coagulated concrete and stones, which facilitates the user to separate different waste materials and recycle them finely. The concrete blocks impact on the edges of the three-pronged rods, and can be better broken and crushed along the sharp edges.

[0030] In the application, the soil blocks and stone blocks are extruded into the wall groove, so that they cannot perform circumferential movement. At this time, with the movement of the steel sheet, the steel sheet gradually cuts into the concrete blocks and stone blocks along one side, and pushes the concrete blocks and stone blocks upward along the wall groove by using the track formed by itself, until they are aligned with the secondary leakage hole and are discharged. In this way, the steel sheet performing circumferential movement lifts the concrete blocks and stone blocks, separates them from the powder and slag, and discharges them. Different depths of the wall groove also separate different sizes of the concrete blocks and stone blocks. Compared with the common single hole leakage screen, the screening device can finely and variously screen, which facilitates the user to separately process or utilize different sizes of waste materials.

[0031] In the application, the concrete blocks larger than the receiving range of all wall grooves are extruded into a larger reflux groove. With the movement of the steel sheet, the steel sheet gradually cuts into the concrete blocks along one side, and pushes the concrete blocks upward along the reflux groove by using the track formed by itself, until the concrete blocks contact the guide plate, are guided into the notch and the inner cylinder, and are again subjected to the collision process with the three-pronged rods. In this way, the oversized concrete blocks are refluxed and crushed until they are broken into pieces that can be discharged through the primary leakage hole or the secondary leakage hole, so as to avoid that the oversized concrete blocks are accumulated in the equipment and affect the normal screening effect. The cyclic processing process does not need manual intervention, and the convenience of screening concrete by using the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a perspective structural schematic view of the application;

[0033] Figure 2 It is a perspective structural schematic view of the screening cylinder of the application;

[0034] Figure 3 It is a bottom view of the screening cylinder of the application;

[0035] Figure 4 It is a perspective structural sectional view of the screening cylinder of the application;

[0036] Figure 5 It is a perspective structural sectional view of the screening cylinder, the ring plate and the cylinder wall of the application;

[0037] Figure 6 It is an enlarged view of A in the application; Figure 5

[0038] ​Figure 7 Structure diagram of the screen cylinder and the inner cylinder of the application;

[0039] Figure 8 Structure diagram of the screen cylinder and the inner cylinder of the application;

[0040] Figure 9 Sectional view of the upper wall groove and the reflux groove of the screen cylinder of the application;

[0041] Figure 10 Structure diagram of the wall groove and the reflux groove of the application.

[0042] In the figure: 1, screen cylinder; 2, inlet; 3, conveying belt; 4, base; 5, support; 6, motor; 7, screen separator; 71, frustum; 72, shaft column; 73, three-pronged rod; 74, inner cylinder; 75, ring plate; 76, cylinder wall; 77, primary leakage hole; 78, multi-stage leakage separator; 781, wall groove; 782, secondary leakage hole; 783, steel sheet; 784, reflux device; 7841, reflux groove; 7842, clamping groove; 7843, triangular shell; 7844, spring; 7845, notch; 7846, guide plate. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0044] Please refer to Figures 1 to 10 The application provides a technical solution: a screening device for waste regeneration concrete, comprising a screen cylinder 1, the top of the screen cylinder 1 is provided with an inlet 2, and the left side of the screen cylinder 1 is provided with a conveying belt 3 corresponding to the inlet 2, the lower side of the screen cylinder 1 is provided with a base 4, and the screen cylinder 1 and the conveying belt 3 are both installed on the base 4 through supports 5.

[0045] A motor 6 is fixedly installed at the bottom of the screen cylinder 1, and a screen separator 7 driven by the motor 6 is arranged in the screen cylinder 1. In use, the treated concrete is poured into the screen cylinder 1 through the inlet 2 at the top of the screen cylinder 1 by the conveying belt 3, and the waste is screened by the screen separator 7.

[0046] In the embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 10As shown, the sieve classifier 7 includes a conical frustum 71 fixedly arranged on the inner bottom wall of the sieve cylinder 1, the axis of the conical frustum 71 is rotatably connected with a shaft column 72, the bottom end of the shaft column 72 penetrates the conical frustum 71 and the sieve cylinder 1 and is connected with the rotating shaft of the motor 6, the surface of the shaft column 72 is fixedly connected with a plurality of groups of triangular rods 73, and each group of triangular rods 73 is provided with three triangular rods, and the adjacent two groups of triangular rods 73 are staggered;

[0047] The sieve cylinder 1 is movably provided with an inner cylinder 74, and the inner wall of the inner cylinder 74 is fixedly connected with the triangular rods 73. The motor 6 is started to drive the shaft column 72, the triangular rods 73 and the inner cylinder 74 to rotate. The top edge of the sieve cylinder 1 is fixedly provided with a ring plate 75, and the ring plate 75 is arranged towards the inside of the sieve cylinder 1. The bottom of the ring plate 75 is fixedly connected with a cylinder 76 corresponding to the inner cylinder 74, and the cylinder 76 is provided in an annular structure matched with the inner cylinder 74;

[0048] The bottom of the sieve cylinder 1 is provided with a primary leakage hole 77. The concrete enters the inner cylinder 74 through the ring plate 75 and the cylinder 76, and is scattered by the rotating triangular rods 73. The powder and slag directly pass through the triangular rods 73 and fall to the bottom of the sieve cylinder 1, and are scattered to the surrounding along the conical frustum 71 and are discharged through the primary leakage hole 77. The concrete blocks fall along the gaps between the triangular rods 73 to the next layer of triangular rods 73 until they fall to the bottom, and are blocked by the triangular rods 73;

[0049] The inner cylinder 74 and the sieve cylinder 1 are provided with a plurality of multi-stage leakage classifiers 78.

[0050] In this embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 10 The multi-stage leakage classifier 78 includes four wall grooves 781 provided on the inner side wall of the sieve cylinder 1, and the four wall grooves 781 are vertically arranged and arranged in an annular array along the sieve cylinder 1. The groove depths of the four wall grooves 781 are 1:2:3:4, and the four wall grooves 781 are arranged in progression according to the groove depths;

[0051] The upper side of the wall groove 781 is provided with a secondary leakage opening 782, and the secondary leakage opening 782 penetrates the sieve cylinder 1 and communicates with the outside;

[0052] The side surface of the inner cylinder 74 is fixedly connected with a steel sheet 783 matched with the wall groove 781, and the steel sheet 783 is in a spiral structure. When the concrete blocks and stones that cannot be broken fall to the bottom of the inner cylinder 74, they roll to the space between the inner cylinder 74 and the screening cylinder 1 along the frustum 71, and are driven to move in a circle by the steel sheet 783 on the inner cylinder 74. When the blocks and stones are rotated to the wall groove 781 corresponding to the size of the blocks and stones, the materials accumulated on the frustum 71 will push the blocks and stones into the wall groove 781, and the blocks and stones cannot move in a circle. At this time, with the movement of the steel sheet 783, the steel sheet 783 gradually cuts into the blocks and stones along one side, and pushes the blocks and stones to move upwards along the wall groove 781 by using the track formed by itself.

[0053] The screening cylinder 1, the ring plate 75 and the cylinder wall 76 are provided with a reflux device 784 matched with the steel sheet 783.

[0054] In the embodiment, as shown in Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 10 The reflux device 784 includes four reflux grooves 7841 opened on the inner side wall of the screening cylinder 1, and the four reflux grooves 7841 are spaced apart from the four wall grooves 781.

[0055] The groove depth ratio between the reflux groove 7841 and the deepest wall groove 781 is 5:4.

[0056] The bottom of the reflux groove 7841 is provided with a clamping groove 7842 in a U-shaped structure. The inside of the clamping groove 7842 is slidably connected with a triangular shell 7843, and the inside of the triangular shell 7843 is provided with a spring 7844. The two ends of the spring 7844 are connected to the inner wall of the triangular shell 7843 and the bottom wall of the reflux groove 7841, respectively. The spring 7844 pushes the triangular shell 7843 to move upwards. When the concrete blocks that fit the size of the reflux groove 7841 enter, the triangular shell 7843 can push the spring 7844 to move downwards. The waste that is too small to fit the wall groove 781 is not enough to drive the weight of the triangular shell 7843, that is, it cannot enter the reflux groove 7841, avoiding the discharge process of the smaller waste that cannot enter the wall groove 781.

[0057] The inner wall of the barrel 76 is provided with a notch 7845 corresponding to the backflow groove 7841, and the top end of the backflow groove 7841 is fixedly provided with a guide plate 7846. The plate surface on one side of the backflow groove 7841 is provided as an inclined surface corresponding to the notch 7845. The concrete block larger than the receiving range of all the wall grooves 781 is squeezed into the larger backflow groove 7841. With the movement of the steel sheet 783, the steel sheet 783 gradually cuts into the concrete block on one side, and pushes the concrete block along the backflow groove 7841 upward by using the track formed by itself, until the concrete block contacts the guide plate 7846, and is guided into the notch 7845 and the inner barrel 74, and then enters the collision process with the three-pronged rod 73 again.

[0058] As shown in the embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 10 The surface of the three-pronged rod 73 facing upward is a prismatic surface. When the falling concrete block contacts the prismatic surface, the concrete block can be better broken and fragmented along the acute edge, and compared with a flat surface, the concrete block will not be temporarily retained.

[0059] As shown in the embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 10 The conical frustum 71 and the screening barrel 1 are connected by bolts. The bolts can realize quick disassembly and assembly of the conical frustum 71, the shaft column 72, the inner barrel 74, the motor 6 and other components.

[0060] As shown in the embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 10 Figure 1 Figure 2 Figure 3 Figure 4 Figures 5 to 10 The bottom edge of the steel sheet 783 is provided with a rounded corner. The rounded corner can make the steel sheet 783 better cut into the concrete block, and compared with a flat corner, the steel sheet 783 is not easy to bend and deform under stress.

[0061] A use method of the waste recycling concrete screening device, comprising the following steps:

[0062] S1, start the motor 6 to drive the shaft column 72, the three-pronged rod 73 and the inner barrel 74 to rotate, and use the conveying belt 3 to pour the processed concrete into the inlet 2 at the top of the screening barrel 1;

[0063] S2, the concrete enters the inner cylinder 74 through the ring plate 75 and the cylinder wall 76, and is scattered by the rotating three-pronged rod 73, wherein the powder and slag directly pass through the three-pronged rod 73 and fall to the bottom of the screening cylinder 1, and are scattered to the periphery along the frustum 71, and are discharged through the first leakage hole 77, wherein the concrete blocks fall and are blocked by the three-pronged rod 73, and fall to the next layer of three-pronged rod 73 along the gap of the three-pronged rod 73, until falling to the bottom, and the falling concrete blocks collide with each other in disorder by the staggered three-pronged rod 73, and part of the coagulated concrete and stone are scattered;

[0064] S3, after the concrete blocks and stones that cannot be broken fall to the bottom of the inner cylinder 74, they roll along the frustum 71 between the inner cylinder 74 and the screening cylinder 1, and are driven to move in a circle by the steel sheet 783 on the inner cylinder 74, when the size of the wall groove 781 corresponding to the concrete blocks and stones, the materials accumulated on the frustum 71 are pushed into the wall groove 781, and cannot move in a circle, at this time, with the movement of the steel sheet 783, the steel sheet 783 gradually cuts into the concrete blocks and stones along one side, and pushes the concrete blocks and stones along the wall groove 781 by using the track formed by itself, until the concrete blocks and stones are aligned with the second leakage hole 782 and are discharged;

[0065] S4, during the screening process, the concrete blocks larger than the receiving range of all wall grooves 781 are pushed into the larger reflux groove 7841, with the movement of the steel sheet 783, the steel sheet 783 gradually cuts into the concrete blocks along one side, and pushes the concrete blocks along the reflux groove 7841 by using the track formed by itself, until the concrete blocks contact the guide plate 7846, and are guided into the notch 7845 and the inner cylinder 74, and are again subjected to the collision process with the three-pronged rod 73, so as to reflux and break the oversized concrete blocks.

[0066] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application, and are not intended to limit the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A screening device for waste recycling concrete, comprising a screening cylinder (1), a top of the screening cylinder (1) is provided with an inlet (2), and a left side of the screening cylinder (1) is provided with a conveying belt (3) corresponding to the inlet (2), characterized in that: The lower side of the screening cylinder (1) is provided with a base (4), and the screening cylinder (1) and the conveying belt (3) are both installed on the base (4) through a support (5); The bottom of the screening cylinder (1) is fixedly installed with a motor (6), and the screening cylinder (1) is provided with a screening device (7) driven by the motor (6); The screening device (7) comprises a frustum (71) fixedly arranged on the inner bottom wall of the screening cylinder (1), a shaft column (72) rotatably connected to the center of the frustum (71), and the bottom end of the shaft column (72) penetrates the frustum (71) and the screening cylinder (1) and is connected with the rotating shaft of the motor (6), a plurality of groups of triangular rods (73) fixedly connected to the surface of the shaft column (72), and each group of triangular rods (73) is provided with three triangular rods (73), and the adjacent two groups of triangular rods (73) are staggered; The inner cylinder (74) is movably arranged in the screening cylinder (1), and the inner wall of the inner cylinder (74) is fixedly connected with the triangular rods (73), the top edge of the screening cylinder (1) is fixedly installed with a ring plate (75), and the ring plate (75) is arranged towards the inner side of the screening cylinder (1), the bottom of the ring plate (75) is fixedly connected with a cylinder (76) corresponding to the inner cylinder (74), and the cylinder (76) is provided in an annular structure matched with the inner cylinder (74); A first leakage hole (77) is formed in the bottom of the screening cylinder (1); The inner cylinder (74) and the screening cylinder (1) are provided with a plurality of multi-stage leakage devices (78); The multi-stage leakage device (78) comprises four wall grooves (781) formed in the inner side wall of the screening cylinder (1), the four wall grooves (781) are vertically arranged and arranged in an annular array along the screening cylinder (1), the groove depths of the four wall grooves (781) are 1:2:3:4, and the four wall grooves (781) are progressively arranged according to the groove depths; The upper side of the wall groove (781) is provided with a second leakage hole (782), and the second leakage hole (782) penetrates the screening cylinder (1) and communicates with the outside; The side surface of the inner cylinder (74) is fixedly connected with a steel sheet (783) matched with the wall groove (781), and the steel sheet (783) is provided in a spiral structure; The screening cylinder (1), the ring plate (75) and the cylinder (76) are provided with a reflux device (784) matched with the steel sheet (783); The reflux device (784) comprises four reflux grooves (7841) formed in the inner side wall of the screening cylinder (1), and the four reflux grooves (7841) are arranged at intervals between the four wall grooves (781); The groove depth ratio between the reflux groove (7841) and the deepest wall groove (781) is 5:4; The bottom of the reflux groove (7841) is provided with a clamping groove (7842) in a U-shaped structure, a triangular shell (7843) is slidably connected in the clamping groove (7842), a spring (7844) is arranged in the triangular shell (7843), the two ends of the spring (7844) are connected to the inner wall of the triangular shell (7843) and the bottom wall of the reflux groove (7841), and the spring (7844) pushes the triangular shell (7843) to move upwards; The cylinder (76) is provided with a notch (7845) corresponding to the backflow groove (7841), and the top end of the backflow groove (7841) is fixedly provided with a guide plate (7846), and the plate surface on one side of the guide plate (7846) is provided as an inclined surface corresponding to the notch (7845).

2. A screening device for recycled concrete from waste material according to claim 1, characterized in that The surface of the three-pronged rod (73) towards the upper side is a prismatic surface.

3. A screening apparatus for recycling concrete waste according to claim 2, characterized in that: The frustum (71) and the screening cylinder (1) are connected by bolts.

4. A screening apparatus for recycling concrete waste according to claim 3, wherein: The bottom edge of the steel sheet (783) is provided as a rounded corner.

5. A method for using the waste recycling concrete screening device according to claim 4, comprising the following steps: S1, start the motor (6) to drive the shaft column (72), the three-pronged rod (73) and the inner cylinder (74) to rotate, and use the conveyor belt (3) to pour the processed concrete into the inlet (2) at the top of the screening cylinder (1); S2, the concrete enters the inner cylinder (74) through the ring plate (75) and the cylinder (76), and is scattered by the rotating three-pronged rod (73), wherein the dust and slag directly pass through the three-pronged rod (73) and fall to the bottom of the screening cylinder (1), and are scattered to the surrounding along the frustum (71), and are discharged through the first leakage hole (77), wherein the concrete blocks are blocked by the three-pronged rod (73) during falling, and fall to the next layer of three-pronged rod (73) along the gap of the three-pronged rod (73), until falling to the bottom, and the falling concrete blocks collide with each other in disorder by the staggered three-pronged rods (73), and part of the coagulated concrete and stones are scattered; S3, after the concrete blocks and stones that cannot be broken fall to the bottom of the inner cylinder (74), they roll along the frustum (71) between the inner cylinder (74) and the screening cylinder (1), and are driven to move in a circle by the steel sheet (783) on the inner cylinder (74), when they rotate to the wall groove (781) corresponding to the size of the concrete blocks and stones, the materials accumulated on the frustum (71) push the above-mentioned soil blocks and stones into the above-mentioned wall groove (781), and cannot move in a circle, at this time, with the movement of the steel sheet (783), the steel sheet (783) gradually cuts into the concrete blocks and stones along one side, and pushes the concrete blocks and stones along the wall groove (781) by using the track formed by itself, until they are aligned with the second leakage hole (782) and are discharged; S4, during the screening process, the concrete blocks larger than the receiving range of all wall grooves (781) are pushed into the larger backflow groove (7841), with the movement of the steel sheet (783), the steel sheet (783) gradually cuts into the concrete blocks along one side, and pushes the concrete blocks along the backflow groove (7841) by using the track formed by itself, until they contact the guide plate (7846), are guided into the notch (7845) and the inner cylinder (74), and are again subjected to the collision process with the three-pronged rod (73), so as to backflow and break the oversized concrete blocks.

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