Machine-made sand preparation method capable of synchronously performing crushing and classified screening

Abstract

The invention discloses a machine-made sand processing method capable of synchronously performing crushing and classified screening, which comprises sand making equipment and a preparation method, and the sand making equipment comprises a workbench, a bottom cover, a top cover, a support cylinder and a crushing and classified screening synchronizing mechanism, the synchronizing mechanism comprises a shell, a crushing unit, a first annular framework, a filtering unit, a sealing plate, a driving motor, a grading filter screen and a finished product bin. The method comprises the steps that crushing is conducted through the crushing unit, and meanwhile the shell and the grading filter screen are driven by the driving motor to conduct grading screening. The crushing process and the grading screening process of the machine-made sand are simultaneously realized through one set of equipment, so that the working efficiency is improved, the production cost is saved, the occupancy rate of a construction site is reduced, high-quality machine-made sand is prepared, and particle size mixing of finished product particles of the machine-made sand is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of manufactured sand processing, and particularly relates to a method for preparing manufactured sand in which crushing and classification screening are carried out simultaneously. Background Art

[0002] Manufactured sand refers to sand processed by sand making machines and other auxiliary equipment. The finished product is more regular and can be processed into sand of different rules and sizes according to different process requirements, which can better meet daily needs. Professional equipment is required to produce qualified and applicable sand and gravel, and different particle size sands are classified through classification screening equipment.

[0003] Generally, the steps of sand and gravel crushing and the steps of classification screening are separated, and the equipment used for the two is also different, which results in low preparation efficiency and greatly occupies the site, and is not suitable for small and medium-sized enterprises to apply; on the other hand, the cost of purchasing two sets of equipment by enterprises is very high, and at the same time, more labor needs to be configured, which is further allocated to the price of the manufactured sand finished product, and will significantly reduce the competitiveness of the manufactured sand product. Summary of the Invention

[0004] The present invention discloses a method for processing manufactured sand in which crushing and classification screening are carried out simultaneously, and a set of equipment is used to simultaneously realize the crushing process and the classification screening process of manufactured sand, so as to improve work efficiency, save production costs, reduce the occupancy rate of the construction site, and be used to prepare high-quality manufactured sand.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] A method for processing manufactured sand in which crushing and classification screening are carried out simultaneously, including a sand making device and a preparation method. The sand making device includes a workbench, a bottom cover, a top cover, and a synchronous mechanism for crushing and classification screening. A bottom cover is provided at the top of the workbench, and a plurality of coaxially arranged frustum-shaped support cylinders are provided on the upper end of the workbench where the inner side of the bottom cover is located;

[0007] The synchronous mechanism includes an inverted frustum-shaped housing, the housing is coaxially arranged inside the support cylinder, and the housing is configured with a crushing unit;

[0008] The crushing unit is connected to the bottom cover through the top cover. The outer wall of the housing is divided into a plurality of filtering units by a first annular skeleton from bottom to top, and the mesh numbers of the plurality of filtering units decrease in sequence from bottom to top. A sealing plate is provided at the bottom end of the housing;

[0009] The sealing plate is rotationally connected to the top of the workbench through a driving motor, and a plurality of annular classification filter meshes are coaxially connected to the outer periphery of the housing from bottom to top;

[0010] The inner edge of the graded filter screen is fixedly connected to the outer wall of the housing, and the outer edge is slidably connected to the top end of the corresponding support cylinder. Between adjacent support cylinders, between the support cylinder and the side wall of the bottom cover, and inside the innermost support cylinder, finished product bins for sand and gravel of different particle sizes are formed; the preparation method uses the above-mentioned sand making equipment.

[0011] Preferably, a cylindrical motor protection shell is provided at the top end of the workbench, the driving motor is fixedly arranged inside the motor protection shell, and the sealing plate is rotatably connected to the top end of the motor protection shell through a thrust bearing;

[0012] The output shaft of the driving motor extends upward through the through hole at the top end of the motor protection shell, passes through the inner hole of the thrust bearing, and is fixedly connected to the middle part of the bottom end of the sealing plate;

[0013] A frustum-shaped slide plate is connected between the top edge of the motor protection shell and the edge of the sealing plate, and a finished product bin one for accommodating the sand made by the largest mesh number is formed between the motor protection shell and the side wall of the innermost support cylinder.

[0014] Preferably, the housing is made of steel plate material, and a number of horizontally arranged first annular skeletons are distributed on the outer wall of the housing from bottom to top, and a number of first longitudinal skeletons intersecting the first annular skeletons are evenly distributed around the axis of the outer wall of the housing;

[0015] The outer wall of the housing forms a filter screen structure by punching. A filter unit one for filtering the sand made by the largest mesh number is formed between the sealing plate and the lowermost first annular skeleton and between adjacent first longitudinal skeletons. Filter units with gradually decreasing mesh numbers are formed between adjacent first annular skeletons above the filter unit one and between the uppermost first annular skeleton and the top end of the housing;

[0016] A top plate is fixedly provided at the top end of the housing. The bottom cover is a cylindrical cover body with an open bottom end. The bottom end of the cylindrical cover body is hermetically and fixedly connected to the upper end of the work platform, and a round hole is opened at the top end. The edge of the top plate extends outward to form an extension part. A first annular slider is coaxially provided at the bottom end of the extension part, and a first annular chute is coaxially provided at the edge of the upper port of the round hole. The first annular slider is slidably matched with the first annular chute.

[0017] Preferably, the crushing unit includes a rotating shaft longitudinally arranged at the central axis of the housing. The rotating shaft passes through the top plate and is rotatably connected to the top plate. The top cover is a cylindrical shell structure with an open bottom end;

[0018] A crushing motor is fixedly provided at the top inside the cylindrical shell structure. The output shaft of the crushing motor is fixedly connected to the top end of the rotating shaft. The lower edge of the top cover is fixedly connected to the top end of the bottom cover. A number of crushing rods are evenly distributed on the outer wall of the rotating shaft;

[0019] The top plate is penetrated with a feed hole, a first hopper is provided at the top of the feed hole, a feeding hole is provided at the top of the top cover, a conveying pipe penetrates through the feeding hole, and a second hopper is provided at the top end of the conveying pipe.

[0020] Preferably, it further includes a controller. A photoelectric sensor is provided on the inner wall of the top cover, a detection plate cooperating with the photoelectric sensor is provided at the upper edge of the top plate, and the controller is electrically connected to the power supply module, the crushing motor, the photoelectric sensor, and the driving motor through wires respectively.

[0021] Preferably, the cross-section of the grading filter screen is V-shaped, and includes a plurality of second annular skeletons and second longitudinal skeletons that intersect horizontally and vertically. A first annular plate is integrally connected to the bottom of the grading filter screen. The second annular skeleton at the innermost side of the grading filter screen is fixedly connected to the corresponding first annular skeleton on the outer wall of the housing. One second annular skeleton on the outside of the grading filter screen is slidably connected to the top end of the corresponding support cylinder;

[0022] An annular cover plate with a V-shaped cross-section is further provided at the top end of the grading filter screen. A second annular plate is provided at the bottom of the cover plate. A plurality of sand inlet holes are evenly distributed around the axis on the second annular plate. A plurality of discharge ports are evenly distributed at the outer edge of the cover plate. Electric doors are arranged at the discharge ports. The mesh number of the grading filter screen is the same as that of the corresponding filtering unit.

[0023] Preferably, a second annular chute is coaxially and fixedly provided at the top end of the support cylinder;

[0024] A second annular slider is coaxially provided at the bottom end of one second annular skeleton on the outside of the grading filter screen. The second annular chute is slidably engaged with the second annular slider.

[0025] Preferably, the electric door includes a door plate covering the upper end of the discharge port;

[0026] The inner end of the door plate is connected with an electric push rod. The fixed end of the electric push rod is fixedly connected to the upper surface of the cover plate, and the telescopic end is fixedly connected to the inner end of the door plate. The electric push rod is electrically connected to the controller.

[0027] Preferably, support legs are provided at the bottom of the workbench. A plurality of discharge pipes for discharging the finished manufactured sand are distributed around the axis on the workbench corresponding to the bottom of the finished product bin;

[0028] The discharge pipe is provided with a solenoid valve, and the solenoid valve is electrically connected to the controller; a V-shaped diversion plate is provided at the bottom of the cover plate between adjacent discharge ports.

[0029] Preferably, the preparation method includes the following steps:

[0030] (1) The device is in its initial state. Mechanism sand raw materials are fed into the second hopper, and the mechanism sand raw materials enter the first hopper via the conveying pipe and then enter the interior of the housing through the feed hole.

[0031] (2) Start the crushing motor, and crush the mechanism sand raw materials with the crushing rods. After a set time, start the driving motor intermittently. Driven by the driving motor, the housing rotates. The mechanism sand raw materials being crushed rise due to centrifugal force, causing the mechanism sand particles moving along the inner wall of the housing to be screened by the filtering units with different mesh numbers. The mechanism sand particles passing through the filtering units enter the covers of the corresponding grading filter screens and then enter the grading filter screens through the sand inlet holes on the covers. The mechanism sand filtered by the lowermost filtering unit directly enters the first finished product bin.

[0032] (3) Among the mechanism sand particles entering the grading filter screens, those with suitable particle sizes are intercepted in the grading filter screens, while those with smaller particle sizes pass through the grading filter screens and enter the covers of the lower grading filter screens, and then enter the corresponding grading filter screens through the sand inlet holes on the covers, and so on, until they are intercepted by the suitable grading filter screens or finally enter the first finished product bin.

[0033] (4) During the rotation of the housing, the grading filter screens rotate with it. Due to inertia, the mechanism sand moves on the surface of the grading filter screens, causing the mechanism sand with suitable particle sizes to remain and screening out the mechanism sand with smaller particle sizes. Classify the mechanism sand with smaller particle sizes into the corresponding grading filter screens or enter the first finished product bin as described in step (3).

[0034] (5) After a set first time, the crushing motor stops. At the same time, open the discharge port through the electric push rod, increase the rotation speed of the driving motor, and throw the matching mechanism sand particles in the grading filter screens into the corresponding finished product bins. Then, the electric push rod extends and the discharge port closes. The crushing motor starts, and repeat steps (2)-(4).

[0035] (6) After a set second time, the driving motor decelerates and the crushing motor stops. When the photoelectric sensor detects the signal of the detection plate, the driving motor stops, and mechanism sand raw materials are added again from the second hopper.

[0036] (7) Repeat steps (1)-(6) to complete the crushing and grading screening of all the mechanism sand.

[0037] The beneficial effects of the mechanism sand preparation device and method for simultaneous crushing and grading screening of the present invention are as follows:

[0038] The present invention realizes the crushing process and the grading screening process of mechanism sand simultaneously through a set of equipment, so as to improve work efficiency, save production costs, reduce the occupancy rate of the construction site, and is used to prepare high-quality mechanism sand, avoiding the mixing of the particle sizes of the finished mechanism sand particles. Description of the Drawings

[0039] Figure 1 It is a front view structural schematic diagram of the present invention.

[0040] Figure 2 It is a sectional view structural schematic diagram of the present invention.

[0041] Figure 3 It is a top view schematic diagram of the structural relationship between the housing and the grading filter screen of the present invention.

[0042] Figure 4 It is a top view schematic diagram of the structural relationship between the housing and the cover plate of the grading filter screen of the present invention.

[0043] Figure 5 It is a top view structural schematic diagram after the electric door on the cover plate of the grading filter screen of the present invention is opened.

[0044] Figure 6 It is a structural schematic diagram of the present invention with a V-shaped flow guide plate provided at the bottom of the cover plate.

[0045] Figure 7 It is a top view structural schematic diagram of the positional relationship between the housing and the support cylinder of the present invention.

[0046] As shown in the figure: 1-bottom cover, 2-workbench, 3-top cover, 4-second hopper, 5-conveying pipe, 6-discharge pipe, 7-crushing motor, 8-rotating shaft, 9-crushing rod, 10-first hopper, 11-optical sensor, 12-detection plate, 13-top plate, 14-first annular slider, 15-round hole, 16-stiffening rib, 17-support cylinder, 18-second annular slider, 19-electric push rod, 20-first annular framework, 21-grading filter screen, 211-first annular plate, 212-second annular framework, 213-second longitudinal framework, 22-cover plate, 221-second annular plate, 222-sand inlet hole, 223-discharge port, 224-V-shaped flow guide plate, 23-finished product bin, 24-electromagnetic valve, 25-motor protective housing, 26-driving motor, 27-thrust bearing, 28-sealing plate, 29-housing, 291-filter unit, 292-first longitudinal framework. Detailed implementation manners

[0047] The following description is only for the preferred embodiments of the present invention and is not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

[0048] The following embodiments can be understood as separately expressing a part of the local structure or method of the present invention, or can also be understood that the embodiments are combined with each other to explain the connotation of the structure or method of a larger scope of the present invention.

[0049] Embodiment 1

[0050] A preparation device for machine-made sand in which crushing and classification screening are carried out simultaneously, as Figures 1-7 shown, including a workbench 2, a bottom cover 1, a top cover 3, and a mechanism for simultaneous crushing and classification screening. A bottom cover 1 is provided at the top end of the workbench 2, and several coaxial frustum-shaped support cylinders 17 are provided on the upper end of the workbench 2 where the inner side of the bottom cover 1 is located.

[0051] The synchronous mechanism includes an inverted frustum-shaped housing 29, which is coaxially arranged inside the support cylinder 17. The housing 29 is configured with a crushing unit, and the crushing unit is connected to the bottom cover 1 through the top cover 3. The outer wall of the housing 29 is divided into several filtering units 291 from bottom to top by a first annular skeleton 20. The mesh numbers of the several filtering units 291 decrease sequentially from bottom to top. A sealing plate 28 is provided at the bottom end of the housing 29.

[0052] The sealing plate 28 is rotatably connected to the top end of the workbench 2 through a driving motor 26. A plurality of annular classification filter meshes 21 are coaxially connected to the outer periphery of the housing 29 from bottom to top. The inner edge of the classification filter mesh 21 is fixedly connected to the outer wall of the housing 29, and the outer edge is slidably connected to the top end of the corresponding support cylinder 17. Finished product bins 23 for sand and gravel of different particle sizes are formed between adjacent support cylinders 17, between the support cylinder 17 and the side wall of the bottom cover 1, and inside the innermost support cylinder 17.

[0053] In this embodiment, the mesh numbers of the several filtering units 291 decrease sequentially from bottom to top. When the driving motor rotates, due to the centrifugal force, the machine-made sand particles during crushing move upward along the inner wall of the housing. During the movement, they are filtered and screened through the filtering units. In this screening step, except for the lowermost filtering unit, other filtering units may screen out machine-made sand with a suitable particle size and mixed machine-made sand with a particle size smaller than this machine-made sand. These mixed machine-made sands are further screened through several classification filter meshes and are finally intercepted by the classification filter mesh with a particle size suitable for them or finally enter the interior of the first finished product bin. As the crushing process is carried out, the classification screening is carried out simultaneously, which can greatly improve the efficiency of machine-made sand preparation.

[0054] Embodiment 2

[0055] As Figure 2As shown, a cylindrical motor protective housing 25 is provided at the top of the workbench 2. The driving motor 26 is fixedly arranged inside the motor protective housing 25. The sealing plate 28 is rotatably connected to the top of the motor protective housing 25 through a thrust bearing 27. The output shaft of the driving motor 26 extends upward through the through hole at the top of the motor protective housing 25, passes through the inner hole of the thrust bearing 27, and is fixedly connected to the middle of the bottom end of the sealing plate 28. A frustum-shaped slide plate (not marked in the figure for facilitating the diversion of the filtered manufactured sand particles) is connected between the edge of the top of the motor protective housing 25 and the edge of the sealing plate 28. A finished product bin one for accommodating the manufactured sand with the largest mesh number is formed between the motor protective housing 25 and the side wall of the innermost support cylinder 17.

[0056] Embodiment 3

[0057] As Figure 2 、 Figure 3 shown, the housing 29 is made of steel plate material. A plurality of horizontally arranged first annular frameworks 20 are distributed on the outer wall of the housing 29 from bottom to top. A plurality of first longitudinal frameworks 292 intersecting with the first annular frameworks 20 are evenly distributed around the axis on the outer wall of the housing 29.

[0058] The outer wall of the housing 29 forms a filter mesh structure by punching. A first filtering unit for filtering the manufactured sand with the largest mesh number is constituted between the sealing plate and the lowermost first annular framework 20 and between adjacent first longitudinal frameworks 292. Filtering units with gradually decreasing mesh numbers are formed between adjacent first annular frameworks 20 above the first filtering unit and between the uppermost first annular framework 20 and the top of the housing 29.

[0059] A top plate 13 is fixedly provided at the top of the housing 29. The bottom cover 1 is a cylindrical cover body with an open bottom end. The bottom end of the cylindrical cover body is hermetically and fixedly connected to the upper end of the work platform 2, and a circular hole 15 is provided at the top end. The edge of the top plate 13 extends outward to form an extension part. A first annular slider 14 is coaxially provided at the bottom end of the extension part. A first annular sliding groove (not shown in the figure) is coaxially provided at the edge of the upper port of the circular hole. The first annular slider 14 is in sliding fit with the first annular sliding groove.

[0060] Embodiment 4

[0061] As Figure 2 shown, the crushing unit includes a rotating shaft 8 longitudinally arranged at the central axis of the housing 29. The rotating shaft 8 penetrates through the top plate 13 and is rotatably connected to the top plate 13. The top cover 3 is a cylindrical housing structure with an open bottom end. A crushing motor 7 is fixedly provided at the top inside the cylindrical housing structure.

[0062] The output shaft of the crushing motor 7 is fixedly connected to the top end of the rotating shaft 8. The lower edge of the top cover 3 is fixedly connected to the top end of the bottom cover 1. A plurality of crushing rods 9 (used to crush the manufactured sand raw materials, which can also be replaced by crushing tools or hammering methods) are evenly distributed on the outer wall of the rotating shaft 8. A feeding hole penetrates through the top plate 13, and a first hopper 10 is provided at the top of the feeding hole. A feeding hole is provided at the top of the top cover 3, and a conveying pipe 5 penetrates through the feeding hole. A second hopper 4 is provided at the top end of the conveying pipe 5.

[0063] As Figure 2 shown, it further includes a controller. A photoelectric sensor 11 is provided on the inner wall of the top cover 3, and a detection plate 12 cooperating with the photoelectric sensor 11 is provided at the upper edge of the top plate 13. The controller is electrically connected to the power supply module, the crushing motor 7, the photoelectric sensor 11, and the driving motor 26 through wires respectively.

[0064] Embodiment 5

[0065] As Figures 2-7 shown, the cross-section of the grading filter screen 21 is V-shaped, including a plurality of second annular skeletons 212 and second longitudinal skeletons 213 that intersect horizontally and vertically. A first annular plate 211 is integrally connected to the bottom of the grading filter screen 21. The innermost second annular skeleton 212 of the grading filter screen 21 is fixedly connected to the corresponding first annular skeleton 20 on the outer wall of the housing 29. One second annular skeleton 212 outside the grading filter screen 21 is slidably connected to the top end of the corresponding support cylinder 17. The top end of the grading filter screen 21 is further provided with an annular cover plate 22 with a V-shaped cross-section. A second annular plate 221 is provided at the bottom of the cover plate 22. A plurality of sand inlet holes 222 are evenly distributed around the axis on the second annular plate 221. A plurality of discharge ports 223 are evenly distributed on the outer edge of the cover plate 22. Electric doors are arranged at the discharge ports 223. The mesh number of the grading filter screen is the same as that of the corresponding filtering unit (i.e., this filtering unit conveys the manufactured sand particles into this grading filter screen).

[0066] As Figure 2 shown, a second annular sliding groove is coaxially and fixedly provided at the top end of the support cylinder 17. A second annular slider 18 is coaxially provided at the bottom end of one second annular skeleton 212 outside the grading filter screen 21. The second annular sliding groove is slidably matched with the second annular slider 18.

[0067] As Figure 2 、 Figure 4 shown, the electric door includes a door panel (not marked in the figure) covering the upper end of the discharge port 223. The inner end of the door panel is connected with an electric push rod 19. The fixed end of the electric push rod 19 is fixedly connected to the upper surface of the cover plate 22, and the telescopic end is fixedly connected to the inner end of the door panel. The electric push rod 19 is electrically connected to the controller and controls the opening and closing of the discharge port when telescoping.

[0068] Example 6

[0069] As Figure 1 、 Figure 2 shown, support legs are provided at the bottom of the workbench 2. A number of discharge pipes 6 for discharging finished manufactured sand are distributed around the axis on the workbench 2 corresponding to the bottom of the finished product bin 23. The discharge pipe 6 is provided with an electromagnetic valve 24 (when taking materials, the electromagnetic valve is opened), and the electromagnetic valve 24 is electrically connected to the controller; As Figure 6 shown, a V-shaped deflector 224 is provided at the bottom of the cover plate 22 between adjacent discharge ports 223. When discharging through the discharge port 223, the V-shaped deflector 224 is used to deflect the manufactured sand particles towards the discharge port.

[0070] Example 7

[0071] As Figures 1-7 shown, this embodiment provides a preparation method for a manufactured sand preparation device that synchronizes crushing and classification screening, including the following steps:

[0072] (1) The device is in an initial state. The manufactured sand raw material is put into the second hopper, and the manufactured sand raw material enters the first hopper through the conveying pipe, and then enters the interior of the housing through the feed hole; The manufactured sand raw material can be a semi-finished product of manufactured sand or a sand and gravel raw material with a larger particle size;

[0073] (2) Start the crushing motor, and crush the manufactured sand raw material with the crushing rod. After a set time, start the driving motor intermittently. Driven by the driving motor, the housing rotates, and the manufactured sand raw material being crushed rises due to centrifugal force (on the one hand, it can achieve a filtering effect, and on the other hand, the rising manufactured sand raw material contacts the crushing rod, improving the crushing efficiency), so that the manufactured sand particles moving along the inner wall of the housing pass through the filtering units with different mesh numbers for screening. The manufactured sand particles passing through the filtering unit enter the cover plate of the corresponding classification filter screen, and then enter the classification filter screen through the sand inlet hole on the cover plate (the purpose of setting the cover plate is to prevent the manufactured sand in the classification filter screen from being discharged prematurely, ensuring that the qualified particle size of the manufactured sand enters the corresponding finished product bin after sufficient screening, and avoiding the mixing of the particle sizes of the screened finished manufactured sand); The manufactured sand filtered by the lowermost filtering unit directly enters the first finished product bin;

[0074] (3) Among the manufactured sand particles entering the classification filter screen, those with a suitable particle size are intercepted in the classification filter screen, and those with a smaller particle size pass through the classification filter screen and enter the cover plate of the lower classification filter screen, and then enter the corresponding classification filter screen through the sand inlet hole on the cover plate, and so on, until they are intercepted by the appropriate classification filter screen or finally enter the first finished product bin; In this step, driven by the driving motor, the rapid separation and screening of the manufactured sand in the classification filter screen can be quickly realized, ensuring that the finished manufactured sand with a particle size meeting the requirements is screened out;

[0075] (4) During the rotation of the housing, the grading filter screen rotates accordingly. Due to inertia, the manufactured sand moves on the surface of the grading filter screen, allowing the manufactured sand with appropriate particle sizes to remain and screening out the manufactured sand with smaller particle sizes. As described in step (3), the manufactured sand with smaller particle sizes is classified into the corresponding grading filter screen or enters the first finished product bin;

[0076] (5) After a set first time, the crushing motor stops. At the same time, the discharge port is opened by the electric push rod, and the driving motor speeds up (the optimal speed can be obtained through experiments), and the matching manufactured sand particles in the grading filter screen are thrown out into the corresponding finished product bin. Then, the electric push rod extends, the discharge port closes, and the crushing motor starts, repeating steps (2)-(4);

[0077] (6) After a set second time (the second time is the time when the crushing of the manufactured sand in the housing is completed), the driving motor decelerates and the crushing motor stops. When the photoelectric sensor detects the signal of the detection plate, the driving motor stops, and the manufactured sand raw material is added again from the second hopper;

[0078] (7) Repeat steps (1)-(6) to complete the crushing and grading screening of all the manufactured sand.

Claims

1. A method for processing manufactured sand in which crushing and classification screening are carried out simultaneously, characterized in that, Including sand-making equipment and a preparation method, the sand-making equipment includes a workbench, a bottom cover, a top cover, and a synchronous mechanism for crushing and grading and screening. A bottom cover is provided at the top end of the workbench. At the upper end of the workbench where the inner side of the bottom cover is located, there are several coaxially arranged frustum-shaped support cylinders; The synchronous mechanism includes an inverted frustum-shaped housing, the housing is coaxially arranged inside the support cylinder, and the housing is configured with a crushing unit; The crushing unit is connected to the bottom cover through the top cover. The outer wall of the housing is divided into several filtering units by a first annular framework from bottom to top. The mesh numbers of the several filtering units decrease in sequence from bottom to top. A sealing plate is provided at the bottom end of the housing; The sealing plate is rotationally connected to the top end of the workbench through a driving motor. A plurality of annular grading filter meshes are coaxially connected to the outer periphery of the housing from bottom to top; The inner edge of the grading filter mesh is fixedly connected to the outer wall of the housing, and the outer edge is slidably connected to the top end of the corresponding support cylinder. Finished product bins for sands of different particle sizes are formed between adjacent support cylinders, between the support cylinder and the side wall of the bottom cover, and inside the innermost support cylinder; The preparation method uses the above-mentioned sand-making equipment.

2. The method for processing manufactured sand with synchronous crushing and classification screening according to claim 1, characterized in that, A cylindrical motor protection housing is provided at the top end of the workbench. The driving motor is fixedly arranged inside the motor protection housing. The sealing plate is rotationally connected to the top end of the motor protection housing through a thrust bearing; The output shaft of the driving motor extends upward through the through hole at the top end of the motor protection housing, passes through the inner hole of the thrust bearing, and is fixedly connected to the middle part of the bottom end of the sealing plate; A frustum-shaped slide plate is connected between the top edge of the motor protection housing and the edge of the sealing plate. A finished product bin one for accommodating the mechanism-made sand with the largest mesh number is formed between the motor protection housing and the side wall of the innermost support cylinder; 3. The mechanism sand processing method for simultaneous crushing and classification screening according to claim 2, characterized in that, The housing is made of steel plate material. A number of horizontally arranged first annular frameworks are distributed on the outer wall of the housing from bottom to top. A number of first longitudinal frameworks intersecting with the first annular frameworks are evenly distributed around the axis of the outer wall of the housing; The outer wall of the housing forms a filter mesh structure by punching. The area between the sealing plate and the lowermost first annular framework and between adjacent first longitudinal frameworks constitutes a first filtering unit for filtering the mechanism-made sand with the largest mesh number. Filtering units with sequentially decreasing mesh numbers are formed between adjacent first annular frameworks above the first filtering unit and between the uppermost first annular framework and the top end of the housing; A top plate is fixedly provided at the top end of the housing. The bottom cover is a cylindrical cover body with an open lower end. The bottom end of the cylindrical cover body is hermetically and fixedly connected to the upper end of the work platform, and a round hole is opened at the top end. The edge of the top plate extends outward to form an extension part. A first annular slider is coaxially provided at the bottom end of the extension part. A first annular sliding groove is coaxially provided at the edge of the upper port of the round hole. The first annular slider is slidably matched with the first annular sliding groove; 4. The mechanism sand processing method for synchronous crushing and grading screening according to claim 3, characterized in that The crushing unit includes a rotating shaft longitudinally arranged at the central axis of the housing. The rotating shaft penetrates through the top plate and is rotationally connected to the top plate. The top cover is a cylindrical housing structure with an open lower end; A crushing motor is fixedly provided at the top inside the cylindrical housing structure. The output shaft of the crushing motor is fixedly connected to the top end of the rotating shaft. The lower end edge of the top cover is fixedly connected to the top end of the bottom cover. A number of crushing rods are evenly distributed on the outer wall of the rotating shaft; The top plate is penetrated with a feed hole, and a first hopper is provided at the top of the feed hole. A feeding hole is provided at the top of the top cover, and a conveying pipe penetrates through the feeding hole. A second hopper is provided at the top end of the conveying pipe.

5. The mechanism sand processing method for simultaneous crushing and classification screening as described in claim 4, characterized in that, It further includes a controller. A photoelectric sensor is provided on the inner wall of the top cover, and a detection plate cooperating with the photoelectric sensor is provided at the upper edge of the top plate. The controller is electrically connected to the power supply module, the crushing motor, the photoelectric sensor, and the driving motor through wires respectively.

6. The method for processing manufactured sand with synchronous crushing and classification screening according to claim 5, characterized in that The cross-section of the grading filter screen is V-shaped, and includes a plurality of second annular skeletons and second longitudinal skeletons that intersect horizontally and vertically. A first annular plate is integrally connected to the bottom of the grading filter screen. The innermost second annular skeleton of the grading filter screen is fixedly connected to the corresponding first annular skeleton on the outer wall of the housing. One second annular skeleton on the outside of the grading filter screen is slidably connected to the top end of the corresponding support cylinder; An annular cover plate with a V-shaped cross-section is further provided at the top end of the grading filter screen. A second annular plate is provided at the bottom of the cover plate. A plurality of sand inlet holes are evenly distributed around the axis on the second annular plate. A plurality of discharge ports are evenly distributed at the outer edge of the cover plate. Electric doors are arranged at the discharge ports. The mesh number of the grading filter screen is the same as that of the corresponding filtering unit.

7. The method for processing manufactured sand with simultaneous crushing and classification screening as described in claim 6, characterized in that, A second annular chute is coaxially and fixedly provided at the top end of the support cylinder; A second annular slider is coaxially provided at the bottom end of one second annular skeleton on the outside of the grading filter screen. The second annular chute is slidably matched with the second annular slider.

8. A method for processing manufactured sand with synchronous crushing and classification screening as claimed in claim 7, characterized in that, The electric door includes a door plate covering the upper end of the discharge port; The inner end of the door plate is connected with an electric push rod. The fixed end of the electric push rod is fixedly connected to the upper surface of the cover plate, and the telescopic end is fixedly connected to the inner end of the door plate. The electric push rod is electrically connected to the controller.

9. The mechanism sand processing method for simultaneous crushing and classification screening according to claim 8, characterized in that, Support legs are provided at the bottom of the workbench. A plurality of discharge pipes for discharging the finished machine-made sand are distributed around the axis on the workbench corresponding to the bottom of the finished product bin; The discharge pipe is provided with a solenoid valve, and the solenoid valve is electrically connected to the controller; a V-shaped diversion plate is provided at the bottom of the cover plate between adjacent discharge ports.

10. A method for processing manufactured sand with synchronous crushing and classification screening as described in claim 9, characterized in that, The preparation method includes the following steps: (1) When the equipment is in the initial state, the machine-made sand raw material is put into the second hopper. The machine-made sand raw material enters the first hopper through the conveying pipe, and then enters the interior of the housing through the feed hole; (2) Start the crushing motor, and crush the machine-made sand raw material with the crushing rod. After a set time, start the driving motor intermittently. Driven by the driving motor, the housing rotates, and the machine-made sand raw material being crushed rises due to centrifugal force, so that the machine-made sand particles moving along the inner wall of the housing are screened by the filtering units with different mesh numbers. The machine-made sand particles passing through the filtering units enter the cover plate of the corresponding grading filter screen, and enter the grading filter screen through the sand inlet holes on the cover plate; the machine-made sand filtered by the lowermost filtering unit directly enters the finished product bin one; (3) Among the machine-made sand particles entering the grading filter screen, those with suitable particle sizes are intercepted in the grading filter screen, and those with smaller particle sizes pass through the grading filter screen and enter the cover plate of the lower grading filter screen, and enter the corresponding grading filter screen through the sand inlet holes on the cover plate, and so on, until they are intercepted by the suitable grading filter screen or finally enter the finished product bin one; (4) During the rotation of the housing, the grading filter screen rotates accordingly. Due to inertia, the manufactured sand moves on the surface of the grading filter screen, allowing the manufactured sand with appropriate particle size to remain and screening out the manufactured sand with smaller particle size. As described in step (3), the manufactured sand with smaller particle size is classified into the corresponding grading filter screen or enters the first finished product bin; (5) After a set first time, the crushing motor stops. Meanwhile, the discharge port is opened by the electric push rod, the driving motor speeds up, and the matching manufactured sand particles in the grading filter screen are thrown out into the corresponding finished product bin. After that, the electric push rod extends, the discharge port closes, and the crushing motor starts, repeating steps (2)-(4); (6) After a set second time, the driving motor decelerates and the crushing motor stops. When the photoelectric sensor detects the signal of the detection plate, the driving motor stops, and the manufactured sand raw material is added again from the second hopper; (7) Repeat steps (1)-(6) to complete the crushing and grading screening of all the manufactured sand.

Images