A screening device and method for making sand from recycled concrete

Abstract

The present invention relates to a screening device and method for recycled concrete sand making applied to the technical field of sand making and screening. The screening device includes a vibration screening chamber, a fine division chamber, a material detection mechanism, and a screening intelligent controller. A multi-layer inclined screening mesh is rotatably connected to the inner cavity of the vibration screening chamber; the fine division chamber is arranged between the output end of the screening mesh and the material distribution outlet; the material detection mechanism includes a screen detection mechanism matching the screening mesh and a connecting plate detection mechanism matching the receiving plate. The screen detection mechanism includes an adjusting plate connected to the screening mesh, a telescopic member, and an adjusting shaft abutted against the adjusting plate; the screening intelligent controller includes a screening analysis module, a screen control module, and a fine division module. With the above structure, it is possible to judge the amount and specifications of the material entering the screening mesh, and control the material to enter the crushing component for re-crushing and screening according to the demand, so that the amount and specifications of the material screened by the equipment can meet the engineering requirements.

Description

Technical Field

[0001] The present invention relates to a screening device, in particular to a screening device and method for recycled concrete sand making applied to the technical field of sand making and screening technology. Background Art

[0002] Waste concrete is a kind of construction waste, and a large amount of waste concrete will be generated during the processes of new construction, renovation, expansion or demolition. If these waste materials are not properly treated, they will not only occupy land resources, but also may cause environmental pollution. Through sand making processing, waste concrete can be transformed into sands of different specifications and reused in construction projects, thereby reducing the exploitation of natural aggregates, reducing the consumption of natural resources and reducing environmental pollution.

[0003] The patent with the publication number CN213825834U discloses a device for preparing recycled sand material of building concrete slab, including a box body, and a sieve plate for screening materials is arranged on the box body; the device for preparing recycled sand material of building concrete slab further includes a vibrator for vibrating the box body, and a cleaning device for cleaning the sieve plate covered on the box body is also arranged. By putting the damaged concrete materials into the vibrating box body, the materials are screened through the sieve plate by the vibration of the box body, and are screened into materials of different specifications for use in different types of building construction.

[0004] When the above scheme is implemented, through the vibration of the box body, materials are screened out in different specifications through the sieve plate. When the materials are poured onto the sieve plate, when there are more materials, they are likely to accumulate at the pouring place and cannot be screened in time. And because the uses of materials of different specifications are different, when there are more materials of a certain specification during the screening process, they cannot be sold out or used up in time, which will occupy more storage space and affect the recycling efficiency of recycled concrete. Summary of the Invention

[0005] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is that when the materials are poured onto the sieve plate, when there are more materials, they are likely to accumulate at the pouring place and cannot be screened in time. And because the uses of materials of different specifications are different, when there are more materials of a certain specification during the screening process, they cannot be sold out or used up in time, which will occupy more storage space and affect the recycling efficiency of recycled concrete.

[0006] To solve the above problems, the present invention provides a screening device for recycled concrete sand making, including:

[0007] Vibration screening chamber, a feed inlet is provided on one side of the top of the vibration screening chamber. A multi-layer inclined screening mesh is rotatably connected to the inner cavity of the vibration screening chamber. A receiving plate vertically slidably connected to the inner wall of the vibration screening chamber is provided below one end of each screening mesh close to the feed inlet. A diversion plate inclined towards the receiving plate is provided below each screening mesh. A material distribution outlet is provided at the output end of each screening mesh.

[0008] Subdivision chamber, the subdivision chamber is arranged between the output end of the screening mesh and the material distribution outlet. A crushing chamber is correspondingly arranged between the subdivision chamber and the output end of each screening mesh. A crushing component for crushing the material is installed in the crushing chamber. The output end of the crushing chamber is matched with the input end of the corresponding diversion plate through a return material outlet.

[0009] Material detection mechanism, the material detection mechanism includes a screen detection mechanism matched with the screening mesh and a receiving plate detection mechanism matched with the receiving plate. The screen detection mechanism includes an adjusting plate connected to the screening mesh, a telescopic member, and an adjusting shaft abutted against the adjusting plate. The adjusting shaft is installed at the output end of the telescopic member. The telescopic member is used to control the movement of the adjusting shaft. A detection component I is arranged at the bottom of the mounting seat of the telescopic member. The detection component I is used to detect the force state of the telescopic member. The receiving plate detection mechanism includes a receiving plate detection plate connected to the receiving plate and a pressing shaft fixed to the receiving plate detection plate. A detection component II is arranged at the bottom of the pressing shaft. The detection component II is used to detect the force state of the pressing shaft.

[0010] Screening intelligent controller, the screening intelligent controller is installed on the vibration screening chamber. The screening intelligent controller includes a screening analysis module, a screen regulation module, and a subdivision module. The input end of the screening analysis module is respectively connected to the detection component I, the detection component II, the screen regulation module, and the subdivision module by signals. The output end of the screen regulation module is connected to the telescopic member by signal. The output end of the subdivision module is connected to the crushing component by signal.

[0011] In the above-mentioned screening device for recycled concrete sand making, it can judge the amount and specifications of the material entering the screening mesh, and control the material to enter the crushing component for re-crushing and screening according to the requirements, so that the amount and specifications of the material screened by the equipment can meet the engineering requirements.

[0012] As a further improvement of the present application, a transition cavity located above the crushing chamber is opened in the inner cavity of the subdivision chamber. One end of the transition cavity is communicated with the material distribution outlet, and the other end of the transition cavity is communicated with the inner cavity of the vibration screening chamber through a material distribution inlet. A rotatable adjustable bottom plate is connected between the top of the crushing chamber and the transition cavity. A driving member is installed at one end of the adjustable bottom plate. The driving member is used to drive the adjustable bottom plate to rotate. The output end of the subdivision module is connected to the driving member by signal.

[0013] As a further improvement of the present application, the crushing assembly includes a crushing roller installed in the crushing chamber, a crushing main shaft connected in series with a plurality of crushing rollers, and a cam assembly installed at the top of the crushing main shaft. The cam assembly is used to drive the crushing main shaft to move up and down, and the output end of the subdivision module is signal-connected to the cam assembly.

[0014] As a further improvement of the present application, the first detection assembly includes a U-shaped elastic pressure measuring chamber one, a pressure regulating pipe one installed at one end of the elastic pressure measuring chamber one, and a detection rod one inserted into the other end of the elastic pressure measuring chamber one. The bottom of the telescopic member mounting seat abuts against the middle part of the elastic pressure measuring chamber one. Above one end of the detection rod one away from the elastic pressure measuring chamber one, there is an upper distance sensor for detecting the position of the end of the detection rod one. The input end of the screening analysis module is signal-connected to the upper distance sensor.

[0015] As another improvement of the present application, the second detection assembly includes a U-shaped elastic pressure measuring chamber two, a pressure regulating pipe two installed at one end of the elastic pressure measuring chamber two, and a detection rod two inserted into the other end of the elastic pressure measuring chamber two. The bottom of the pressing shaft abuts against the middle part of the elastic pressure measuring chamber two. Below one end of the detection rod two away from the elastic pressure measuring chamber two, there is a lower distance sensor for detecting the position of the end of the detection rod two. The input end of the screening analysis module is signal-connected to the lower distance sensor.

[0016] As a supplementary improvement of the present application, both ends of the elastic pressure measuring chamber one and the elastic pressure measuring chamber two are vertically arranged. The inner cavities of the elastic pressure measuring chamber one and the elastic pressure measuring chamber two are filled with pressure measuring liquid, and sealing baffles are arranged at both ends of the pressure measuring liquid.

[0017] As a supplementary improvement of the present application, the bottoms of the elastic pressure measuring chamber one and the elastic pressure measuring chamber two are fixed to the outer wall of the vibrating screening chamber through support bottom plates.

[0018] As another improvement of the present application, a detection chamber is arranged on one side of the elastic pressure measuring chamber one. The upper end of the inner cavity of the detection chamber is vertically slidably connected with an upper plate fixed to the end of the detection rod one. The upper distance sensor is installed at the top of the detection chamber at a position corresponding to the upper plate. The lower end of the inner cavity of the detection chamber is vertically slidably connected with a lower plate fixed to the end of the detection rod two. The lower distance sensor is installed at the bottom of the detection chamber at a position corresponding to the lower plate.

[0019] As a supplementary improvement of the present application, a middle distance sensor corresponding to the upper plate is installed at the top of the lower plate. The input end of the screening analysis module is signal-connected to the middle distance sensor.

[0020] A screening method for a screening device for making sand from recycled concrete includes the following steps:

[0021] S1. Screening: Pour the material into the inner cavity of the vibration screening chamber through the feed inlet, and screen the material through the screening mesh. The material larger than the mesh size of the screening mesh rolls along the screening mesh towards the material distribution outlet, while the material smaller than the mesh size of the screening mesh falls onto the receiving plate and the guiding plate, and then falls onto the lower-layer screening mesh along the inclined guiding plate for re-screening;

[0022] S2. Regulation: Analyze the amount of material falling onto the screening mesh and the amount of material on the receiving plate through the screening analysis module, judge the content of particles of different specifications in the material poured onto the screening mesh, and adjust the inclination angle of the screening mesh by controlling the operation of the telescopic member;

[0023] S3. Subdivision: When the screening analysis module determines that the content of the corresponding specification material rolling along the screening mesh is relatively large and exceeds the project requirements, the subdivision module controls the crushing component to work, finely crush some of the material rolling along the screening mesh. The finely crushed material flows back into the inner cavity of the vibration screening chamber through the return material outlet and is screened by the lower-layer screening mesh;

[0024] S4. Discharge and storage: The materials screened by different layers of screening meshes are discharged through the material distribution outlet and transported to the corresponding storage bins for storage.

[0025] In summary, before the large-particle material screened out by the screening mesh flows into the material distribution outlet, it can be controlled to enter the crushing component for re-crushing. When the amount of large-particle material screened out by the corresponding screening mesh is excessive, the material can be controlled to enter the crushing component for re-crushing and screening, realizing the analysis and judgment of the specification ratio of the material entering the screening mesh, and correspondingly adjusting the inclination angle of the screening mesh, improving the screening efficiency while enhancing the screening effect, and screening out the corresponding specification materials according to the requirements to meet the corresponding building material requirements. Brief Description of the Drawings

[0026] Figure 1 It is the overall schematic diagram of the first and second embodiments of this application;

[0027] Figure 2 It is the internal schematic diagram of the screening chamber of the first and second embodiments of this application;

[0028] Figure 3 It is the schematic diagram of another perspective of the inside of the screening chamber of the first and second embodiments of this application;

[0029] Figure 4 It is the control principle diagram of the screening intelligent controller of the first embodiment of this application;

[0030] Figure 5 It is the sectional schematic diagram of the screening chamber of the first and second embodiments of this application;

[0031] Figure 6Schematic cross-sectional view of the subdivision chamber for the first and second embodiments of the present application;

[0032] Figure 7 Schematic diagram after the adjustable bottom plate is flipped for the first and second embodiments of the present application;

[0033] Figure 8 Schematic structural diagram of the screen detection mechanism and the connecting plate detection mechanism for the first and second embodiments of the present application;

[0034] Figure 9 Schematic control principle diagram of the screening intelligent controller for the second embodiment of the present application.

[0035] Explanation of the reference numerals in the figure:

[0036] 1. Vibration screening chamber; 2. Feed inlet; 3. Subdivision chamber; 4. Discharge outlet; 5. Screen detection mechanism; 6. Connecting plate detection mechanism; 7. Cam assembly; 8. Crushing main shaft; 9. Screening intelligent controller; 10. Screening mesh; 11. Receiving plate; 12. Deflector; 13. Feed inlet for material distribution; 14. Return material outlet; 15. Adjusting plate; 16. Adjusting shaft; 17. Telescopic member; 18. First elastic pressure chamber; 19. Support bottom plate; 20. Detection chamber; 21. Connecting plate detection plate; 22. Pressing shaft; 23. Second elastic pressure chamber; 24. Crushing chamber; 25. Pressure measuring liquid; 26. Adjustable bottom plate; 27. First pressure regulating pipe; 28. Second pressure regulating pipe; 29. First detection rod; 30. Upper plate; 31. Upper distance sensor; 32. Lower distance sensor; 33. Lower plate; 34. Middle distance sensor; 35. Second detection rod. Specific embodiments

[0037] The following describes the two embodiments of the present application in detail with reference to the accompanying drawings.

[0038] The first embodiment:

[0039] Figures 1 - 8A screening device for making sand from recycled concrete is shown, including a vibration screening chamber 1, a fine division chamber 3, a material detection mechanism and a screening intelligent controller 9. One side of the top of the vibration screening chamber 1 is provided with a feed inlet 2. Inside the cavity of the vibration screening chamber 1, there are multiple layers of inclined screening meshes 10 rotatably connected. Below one end of each screening mesh 10 close to the feed inlet 2, there is a receiving plate 11 vertically and slidably connected to the inner wall of the vibration screening chamber 1. Below each screening mesh 10, there is a guide plate 12 inclined towards the receiving plate 11. At the output end of each screening mesh 10, there is a material distribution outlet 4. The screened materials are transported to a storage bin for storage through the material distribution outlet 4. The materials enter the cavity of the vibration screening chamber 1 through the feed inlet 2 and fall onto the screening mesh 10. The vibration of the vibration screening chamber 1 drives the screening mesh 10 to screen the materials. After screening, the small-sized materials fall onto the bottom receiving plate 11 and the guide plate 12 and flow into the next layer of screening mesh 10 for re-screening. The materials larger than the mesh size of the screening mesh 10 are discharged through the inclined screening mesh 10 via the material distribution outlet 4.

[0040] In addition, the fine division chamber 3 is arranged between the output end of the screening mesh 10 and the material distribution outlet 4. A crushing chamber 24 is correspondingly arranged between the fine division chamber 3 and the output end of each screening mesh 10. A crushing assembly for crushing the materials is installed inside the crushing chamber 24. The output end of the crushing chamber 24 is matched with the input end of the corresponding guide plate 12 through a return material outlet 14. Before the large-particle materials screened out by the screening mesh 10 flow into the material distribution outlet 4, it can be controlled to enter the crushing assembly for re-crushing. When the amount of materials screened out by the corresponding screening mesh 10 is too large, part of the materials can be controlled to enter the crushing assembly for re-crushing and screening, so that the amount and specifications of the materials screened out by the equipment can meet the engineering requirements.

[0041] It is worth mentioning that please refer to Figure 2 、 Figure 5 and Figure 8, the material detection mechanism includes a screen detection mechanism 5 that matches the screening mesh 10 and a receiving plate detection mechanism 6 that matches the receiving plate 11. The screen detection mechanism 5 includes an adjustment plate 15 connected to the screening mesh 10, a telescopic member 17, and an adjustment shaft 16 that abuts against the adjustment plate 15. The adjustment shaft 16 is installed at the output end of the telescopic member 17. The telescopic member 17 is used to control the movement of the adjustment shaft 16. The telescopic member 17 is preferably a telescopic motor or a pneumatic cylinder. By controlling the telescopic member 17 to move the adjustment shaft 16 up and down, the adjustment plate 15 can be controlled to move up and down, thereby adjusting the inclination angle of the screening mesh 10. The larger the inclination angle of the screening mesh 10, the higher its screening efficiency, which can reduce the accumulation degree of the material falling at one end of the screening mesh 10. At the same time, its screening effect will decrease, and the smaller particle material will flow into the material distribution outlet 4 along the screening mesh 10 with a larger inclination angle; on the contrary, the smaller the inclination angle of the screening mesh 10, the lower the screening efficiency, and at the same time its screening effect is good. A detection component one is provided at the bottom of the mounting seat of the telescopic member 17. The detection component one is used to detect the force state of the telescopic member 17. The material entering the screening mesh 10 through the feed inlet 2 will accumulate at its end, and the weight of the material will be transmitted to the detection component one through the adjustment plate 15, the adjustment shaft 16, and the telescopic member 17. Through the detection component one, the amount of material falling at the end of the screening mesh 10 through the feed inlet 2 can be detected at this time.

[0042] In addition, the receiving plate detection mechanism 6 includes a receiving plate detection plate 21 connected to the receiving plate 11 and a pressing shaft 22 fixed to the receiving plate detection plate 21. A detection component two is provided at the bottom of the pressing shaft 22. The detection component two is used to detect the force state of the pressing shaft 22. When the material falls to the end of the screening mesh 10, at this time, the vibration causes more material to be screened through the screening mesh 10 and quickly fall onto the bottom receiving plate 11. The weight of the material is transmitted to the detection component two through the receiving plate detection plate 21 and the pressing shaft 22. Through the detection component two, the amount of material falling onto the receiving plate 11 can be detected, that is, the amount of material falling after screening on the screening mesh 10 can be detected. By analyzing the amount of material falling onto the receiving plate 11 and the amount of material falling onto the screening mesh 10, the distribution data of the particle specifications of the corresponding material can be initially judged. When the amount of material falling onto the screening mesh 10 is large, the inclination angle of the screening mesh 10 needs to be adjusted. At the same time, the amount of material passing through the preliminary filtration of the screening mesh 10 is judged through the receiving plate 11. When the amount of material is large, it is judged that there are fewer large particles in the incoming material, and the inclination angle of the screening mesh 10 can be increased slightly correspondingly; on the contrary, when judging the amount of material passing through the preliminary filtration of the screening mesh 10 through the receiving plate 11, when the amount of material is small, it is judged that there are more large particles in the incoming material, and after being screened by the screening mesh 10, they roll along its surface to the material distribution outlet 4. The inclination angle of the corresponding screening mesh 10 can be increased more, improving the screening efficiency of the corresponding screening mesh 10 for the large amount of incoming material and improving the corresponding screening effect.

[0043] In this embodiment, the screening intelligent controller 9 is installed on the vibration screening chamber 1. The screening intelligent controller 9 includes a screening analysis module, a screen regulating module, and a subdivision module. The input end of the screening analysis module is respectively connected to the first detection component, the second detection component, the screen regulating module, and the subdivision module in a signal connection. The output end of the screen regulating module is connected to the telescopic member 17 in a signal connection. The output end of the subdivision module is connected to the crushing component in a signal connection. When screening, the material is input into the vibration screening chamber 1 through the feed inlet 2 and gradually accumulates at one end of the screening mesh 10. The vibration screening chamber 1 drives the screening mesh 10 to vibrate to screen the material. The first detection component detects the force data at the bottom of the telescopic member 17 and feeds it back to the screening analysis module. The screening analysis module judges the amount of material falling onto the screening mesh 10 based on the force data. When it judges that the amount of material is large, it will give a judgment signal to increase the inclination angle of the screening mesh 10. At the same time, the first detection component feeds back the force data of the pressure shaft 22 detected to the screening analysis module. The screening analysis module judges the amount of material falling onto the receiving plate 11 based on the force data. When it judges that the amount of material is large, the screening analysis module judges that the proportion of smaller particles in the particles falling onto the screening mesh 10 is relatively large. The screening analysis module sends a signal to slightly increase the inclination angle to the screen regulating module, controls the telescopic member 17 to work to slightly increase the height of the adjusting plate 15, thereby slightly increasing the inclination angle of the screening mesh 10. When the screening analysis module judges that the amount of material falling onto the receiving plate 11 is small based on the force data, it judges that the proportion of smaller particles in the particles falling onto the screening mesh 10 is relatively small. At this time, more large particles roll along the screening mesh 10 towards the material distribution outlet 4. The screening analysis module sends a signal to greatly increase the inclination angle to the screen regulating module, controls the telescopic member 17 to work to greatly increase the height of the adjusting plate 15, thereby greatly increasing the inclination angle of the screening mesh 10. At the same time, the screening analysis module compares the amount of material on the receiving plate 11 with the minimum amount of material on the preset receiving plate 11 (the minimum amount of material on the receiving plate 11 is preset in the screening analysis module). When it judges that it is less than the minimum amount of material, it analyzes that there are more large-particle materials in the material and they exceed the demand. The screening analysis module will send a subdivision signal to the subdivision module, control the crushing component to work, refine and crush some of the materials passing through the subdivision chamber 3. The crushed materials enter the bottom guide plate 12 through the return material outlet 14 and roll along the guide plate 12 to the bottom screening mesh 10 for screening again, realizing the analysis and judgment of the specification ratio of the materials entering the screening mesh 10, adjusting the inclination angle of the screening mesh 10, improving the screening efficiency while enhancing the screening effect, and screening out the corresponding specification materials according to the demand to meet the corresponding building material requirements.

[0044] In addition, please refer to Figure 6 and Figure 7, a transition cavity is provided in the inner cavity of the sub-chamber 3 above the crushing chamber 24. One end of the transition cavity is communicated with the material distribution outlet 4, and the other end of the transition cavity is communicated with the inner cavity of the vibration screening chamber 1 through the material distribution inlet 13. A rotatable bottom plate 26 is rotatably connected between the top of the crushing chamber 24 and the transition cavity. A driving member is installed at one end of the rotatable bottom plate 26 for driving the rotatable bottom plate 26 to rotate. The driving member is preferably an electric motor or a pneumatic motor. The output end of the sub-module is signal-connected to the driving member. When the sub-module controls the crushing of some materials, some materials passing through the transition cavity will enter the crushing chamber 24. At this time, the sub-module controls the driving member to work, and the driving member controls the rotatable bottom plate 26 to turn over, so that some materials passing through the transition cavity fall into the crushing chamber 24 and are crushed by the crushing assembly. The part of the material that does not enter the crushing chamber 24 is discharged through the material distribution outlet 4, achieving the purpose of finely crushing some materials.

[0045] Moreover, the crushing assembly includes a crushing roller installed in the crushing chamber 24, a crushing main shaft 8 connected in series with a plurality of crushing rollers, and a cam assembly 7 installed at the top of the crushing main shaft 8. The cam assembly 7 is used to drive the crushing main shaft 8 to move up and down. The output end of the sub-module is signal-connected to the cam assembly 7. The cam assembly 7 is a common cam mechanism in the prior art and can automatically drive the crushing main shaft 8 to move up and down. When the sub-module controls the crushing assembly to work, it will control the cam assembly 7 to work, drive the crushing main shaft 8 to move up and down, and drive a plurality of crushing rollers to move up and down in the crushing chamber 24 to crush the materials entering the crushing chamber 24. The crushed materials flow back to the deflector 12 through the return material outlet 14 at the bottom and are conveyed to the screening mesh 10 of the next layer for screening again, so that the specifications of the screened materials meet the corresponding building material requirements.

[0046] The second implementation mode:

[0047] Figures 1 - 3 and Figures 8 - 9A screening device for making sand from recycled concrete shown, different from the first embodiment, the first detection component includes a U-shaped elastic pressure measuring chamber 18, a pressure regulating pipe 27 installed at one end of the elastic pressure measuring chamber 18, and a detection rod 29 inserted into the other end of the elastic pressure measuring chamber 18. The bottom of the mounting seat of the telescopic member 17 abuts against the middle of the elastic pressure measuring chamber 18. Above the end of the detection rod 29 away from the elastic pressure measuring chamber 18, there is an upper distance sensor 31 for detecting the position of the end of the detection rod 29. The input end of the screening analysis module is signal-connected to the upper distance sensor 31. When detecting the force state received by the bottom of the telescopic member 17 through the first detection component, the force received by the telescopic member 17 will be transmitted to the bottom elastic pressure measuring chamber 18, squeezing the outer wall of the elastic pressure measuring chamber 18, compressing the inner cavity of the elastic pressure measuring chamber 18, thereby pushing the detection rod 29 to move, and detecting the change in its distance from the upper plate 30 through the upper distance sensor 31, which can judge the force state of the telescopic member 17, and thus judge the weight of the material falling onto the screening mesh 10. By setting the pressure regulating pipe 27, different amounts of compressed gas can be filled into the end of the elastic pressure measuring chamber 18 away from the detection rod 29 through the pressure regulating pipe 27, adjusting the gas pressure in the inner cavity of the elastic pressure measuring chamber 18, thereby adjusting the change degree of the elastic pressure measuring chamber 18 after being squeezed by the telescopic member 17, facilitating adjusting the change degree of the data detected by the upper distance sensor 31 according to different specifications or amounts of materials, and adjusting the sensitivity of the detection.

[0048] In addition, please refer to Figure 8 , the second detection component includes a U-shaped elastic pressure measuring chamber 23, a pressure regulating pipe 28 installed at one end of the elastic pressure measuring chamber 23, and a detection rod 35 inserted into the other end of the elastic pressure measuring chamber 23. The bottom of the pressing shaft 22 abuts against the middle of the elastic pressure measuring chamber 23. Below the end of the detection rod 35 away from the elastic pressure measuring chamber 23, there is a lower distance sensor 32 for detecting the position of the end of the detection rod 35. The input end of the screening analysis module is signal-connected to the lower distance sensor 32. When detecting the force state of the bottom of the pressing shaft 22 through the first detection component, the force received by the pressing shaft 22 will be transmitted to the bottom elastic pressure measuring chamber 23, squeezing the outer wall of the elastic pressure measuring chamber 23, compressing the inner cavity of the elastic pressure measuring chamber 23, thereby pushing the detection rod 35 to move, and detecting the change in its distance from the detection rod 35 through the lower distance sensor 32, which can judge the force state of the pressing shaft 22, and thus judge the weight of the material falling onto the receiving plate 11. By setting the pressure regulating pipe 28, different amounts of compressed gas can be filled into the end of the elastic pressure measuring chamber 23 away from the detection rod 35 through the pressure regulating pipe 28, adjusting the gas pressure in the inner cavity of the elastic pressure measuring chamber 23, thereby adjusting the change degree of the elastic pressure measuring chamber 23 after being squeezed by the pressing shaft 22, facilitating adjusting the change degree of the data detected by the lower distance sensor 32 according to different specifications or amounts of materials, and adjusting the sensitivity of the detection.

[0049] Preferably, both ends of the first elastic pressure chamber 18 and the second elastic pressure chamber 23 are vertically arranged. The inner cavities of the first elastic pressure chamber 18 and the second elastic pressure chamber 23 are filled with a pressure-measuring liquid 25. Sealing baffles are arranged at both ends of the pressure-measuring liquid 25. By squeezing the pressure-measuring liquid 25, the pressure change degree of the cavities at both ends of the first elastic pressure chamber 18 and the second elastic pressure chamber 23 is increased, and the first detection rod 29 and the second detection rod 35 are pushed to move more sensitively. The sealing baffles can limit the flow range of the end of the pressure-measuring liquid 25 and reduce its leakage. The bottoms of the first elastic pressure chamber 18 and the second elastic pressure chamber 23 are fixed to the outer wall of the vibration screening chamber 1 through support bottom plates 19 to install and fix the first elastic pressure chamber 18 and the second elastic pressure chamber 23.

[0050] In this embodiment, a detection chamber 20 is arranged on one side of the first elastic pressure chamber 18. An upper plate 30 fixed to the end of the first detection rod 29 is vertically slidably connected to the upper end of the inner cavity of the detection chamber 20. An upper distance sensor 31 is installed at the top of the detection chamber 20 at a position corresponding to the upper plate 30. A lower plate 33 fixed to the end of the second detection rod 35 is vertically slidably connected to the lower end of the inner cavity of the detection chamber 20. A lower distance sensor 32 is installed at the bottom of the detection chamber 20 at a position corresponding to the lower plate 33. After the cavity of the first elastic pressure chamber 18 is compressed, the end of the first detection rod 29 is driven to move upward, and the other end of the first detection rod 29 synchronously drives the upper plate 30 to move upward. The displacement distance of the upper plate 30 can be detected by the upper distance sensor 31, so as to accurately analyze the weight of the material on the screening mesh 10. Similarly, the displacement of the lower plate 33 at the end of the second detection rod 35 is detected by the lower distance sensor 32, so as to accurately analyze the weight of the material on the receiving plate 11.

[0051] It is worth mentioning that a middle distance sensor 34 corresponding to the upper plate 30 is installed on the top of the lower plate 33. The input end of the screening analysis module is signal-connected to the middle distance sensor 34. The distance difference between the upper plate 30 and the lower plate 33 can be detected by the middle distance sensor 34, so as to intuitively judge the gap between the amount of material falling onto the screening mesh 10 and the amount of material falling onto the receiving plate 11 after being screened by the screening mesh 10. A large gap (exceeding the preset value in the screening analysis module) indicates that the proportion of small particle sizes in the material is relatively large, and more small particle materials fall onto the receiving plate 11; a small gap (less than the preset value in the screening analysis module) indicates that the proportion of small particle sizes in the material is relatively small, and more large particle materials roll along the screening mesh 10 towards the material distribution outlet 4, so that the screening analysis module can quickly judge the material content falling onto the screening mesh 10 through the distance data received by the middle distance sensor 34.

[0052] A screening method for a screening device for making sand from recycled concrete includes the following steps:

[0053] S1. Screening: Pour the material into the inner cavity of the vibration screening chamber 1 through the feed inlet 2, and screen the material through the screening mesh 10. The material larger than the mesh of the screening mesh 10 rolls along the screening mesh 10 towards the material distribution outlet 4, and the material smaller than the mesh of the screening mesh 10 falls onto the receiving plate 11 and the diversion plate 12, and then falls onto the lower-layer screening mesh 10 along the inclined diversion plate 12 for re-screening;

[0054] S2. Regulation: Analyze the amount of material falling onto the screening mesh 10 and the amount of material on the receiving plate 11 through the screening analysis module, judge the content of particles of different specifications in the material poured onto the screening mesh 10, and adjust the inclination angle of the screening mesh 10 by controlling the operation of the telescopic member 17;

[0055] S3. Subdivision: When the screening analysis module determines that the content of the corresponding specification material rolling along the screening mesh 10 is relatively large and exceeds the project requirements, the subdivision module controls the crushing component to work, refine and crush some of the material rolling along the screening mesh 10. The refined and crushed material flows back into the inner cavity of the vibration screening chamber 1 through the return material outlet 14 and is screened by the lower-layer screening mesh 10;

[0056] S4. Discharging and storage: The materials screened by different layers of screening meshes 10 are discharged through the material distribution outlet 4 and transported to the corresponding storage bins for storage.

[0057] Combined with the current actual requirements, the above implementation manner adopted in this application, the protection scope is not limited to this. Within the knowledge scope of those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A screening device for recycled concrete sand making, characterized in that: include: A vibration screening chamber, wherein a feed port is arranged on one side of the top of the vibration screening chamber, and a plurality of inclined screening nets are rotatably connected to the inner cavity of the vibration screening chamber, and a receiving plate vertically slidably connected to the inner wall of the vibration screening chamber is arranged below one end of each screening net close to the feed port, and a guide plate inclined toward the receiving plate is arranged below each screening net, and a material distribution outlet is arranged at the output end of each screening net; A subdivision chamber, the subdivision chamber is arranged between the output end of the screening net and the material distribution outlet, the subdivision chamber and the output end of each screening net are respectively provided with a crushing chamber, a crushing assembly for crushing the material is installed in the crushing chamber, and the output end of the crushing chamber is matched with the corresponding guide plate input end through the return material outlet; A material detection mechanism, the material detection mechanism includes a screen detection mechanism matched with the screening mesh and a connecting plate detection mechanism matched with the material connecting plate, the screen detection mechanism includes an adjustment plate connected with the screening mesh, a telescopic member, and an adjustment shaft abutting against the adjustment plate, the adjustment shaft is installed at the output end of the telescopic member, the telescopic member is used to control the movement of the adjustment shaft, a detection component 1 is arranged at the bottom of the mounting seat of the telescopic member, the detection component 1 is used to detect the stress state of the telescopic member, the connecting plate detection mechanism includes a connecting plate detection plate connected with the material connecting plate, and a pressing shaft fixed with the connecting plate detection plate, a detection component 2 is arranged at the bottom of the pressing shaft, and the detection component 2 is used to detect the stress state of the pressing shaft; A screening intelligent controller, which is installed on the vibration screening chamber, and includes a screening analysis module, a screen control module and a subdivision module. The input end of the screening analysis module is respectively connected to the detection component 1, the detection component 2, the screen control module and the subdivision module signal, the output end of the screen control module is connected to the telescopic part signal, and the output end of the subdivision module is connected to the crushing component signal; The detection component 1 includes a U-shaped elastic pressure measuring chamber, a pressure regulating tube installed at one end of the elastic pressure measuring chamber, and a detection rod connected to the other end of the elastic pressure measuring chamber. The bottom of the telescopic member mounting seat abuts against the middle of the elastic pressure measuring chamber. An upper distance sensor is provided above the end of the detection rod away from the elastic pressure measuring chamber, which is used to detect the position of one end of the detection rod. The input end of the screening analysis module is connected to the upper distance sensor signal. The detection component 2 includes a U-shaped elastic pressure measuring chamber, a pressure regulating tube installed at one end of the elastic pressure measuring chamber, and a detection rod connected to the other end of the elastic pressure measuring chamber. The bottom of the pressure shaft abuts against the middle of the elastic pressure measuring chamber. A lower distance sensor is provided below the end of the detection rod away from the elastic pressure measuring chamber, which is used to detect the position of the second end of the detection rod. The input end of the screening analysis module is connected to the lower distance sensor signal.

2. A screening device for recycled concrete sand making according to claim 1, characterized in that: The inner cavity of the subdivision chamber is provided with a transition chamber located above the grinding chamber, one end of the transition chamber is connected with the distribution outlet, and the other end of the transition chamber is connected with the inner cavity of the vibration screening chamber through the distribution inlet. An adjustable bottom plate is rotatably connected between the top of the grinding chamber and the transition chamber, a driving member is installed at one end of the adjustable bottom plate, and the driving member is used to drive the adjustable bottom plate to rotate, and the output end of the subdivision module is connected with the driving member signal.

3. A screening device for recycled concrete sand making according to claim 1, characterized in that: The crushing assembly includes a crushing roller installed in a crushing chamber, a crushing main shaft connected in series with multiple crushing rollers, and a cam assembly installed on the top of the crushing main shaft. The cam assembly is used to drive the crushing main shaft to move up and down, and the output end of the subdivision module is connected to the cam assembly signal.

4. A screening device for recycled concrete sand making according to claim 1, characterized in that: Both ends of the elastic pressure measuring chamber 1 and the elastic pressure measuring chamber 2 are vertically arranged, the inner cavities of the elastic pressure measuring chamber 1 and the elastic pressure measuring chamber 2 are filled with pressure measuring fluid, and sealing plates are arranged at both ends of the pressure measuring fluid.

5. A screening device for recycled concrete sand making according to claim 4, characterized in that: The bottoms of the first elastic pressure measuring chamber and the second elastic pressure measuring chamber are fixed to the outer wall of the vibration screening chamber through a supporting bottom plate.

6. A screening device for recycled concrete sand making according to claim 5, characterized in that: A detection chamber is provided on one side of the elastic pressure measuring chamber, and the upper end of the inner cavity of the detection chamber is vertically slidably connected to an upper plate fixed to one end of a detection rod, and the upper distance sensor is installed at the top of the detection chamber and at a position corresponding to the upper plate, and the lower end of the inner cavity of the detection chamber is vertically slidably connected to a lower plate fixed to two ends of the detection rod, and the lower distance sensor is installed at the bottom of the detection chamber and at a position corresponding to the lower plate.

7. A screening device for recycled concrete sand making according to claim 6, characterized in that: A mid-distance sensor corresponding to the upper plate is installed on the top of the lower plate, and the input end of the screening analysis module is connected to the mid-distance sensor signal.

8. A screening method for a screening device for making recycled concrete sand according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Screening: Pour the material into the inner cavity of the vibrating screening chamber through the feed port, and screen the material through the screening net. The material larger than the mesh size of the screening net rolls along the screening net to the material outlet, and the material smaller than the mesh size of the screening net falls onto the receiving plate and the guide plate, and falls onto the screening net of the lower layer along the inclined guide plate for further screening; S2. Control: Analyze the amount of material falling on the screening net and the amount of material on the receiving plate through the screening analysis module, determine the content of particles of different specifications in the material poured on the screening net, and adjust the inclination angle of the screening net by controlling the telescopic part; S3, subdivision: When the screening analysis module determines that the content of the corresponding specification material rolling along the screening net exceeds the engineering requirements, the subdivision module controls the crushing component to finely crush part of the material rolling along the screening net. The finely crushed material flows back to the inner cavity of the vibration screening chamber through the return outlet and is screened by the next layer of the screening net; S4. Material discharging storage: The materials screened by different layers of screening nets are discharged through the material distribution outlet and transported to the corresponding storage bin for storage.

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