Screening device and method for recycled concrete sand making

Abstract

The invention relates to a screening device and method for recycled concrete sand making in the technical field of sand making screening, the screening device comprises a vibration screening chamber, a subdivision chamber, a material detection mechanism and a screening intelligent controller, and an inner cavity of the vibration screening chamber is rotationally connected with multiple layers of inclined screening nets; the subdivision chamber is arranged between the output end of the screening net and the separated material outlet; the material detection mechanism comprises a screen detection mechanism matched with the screening net and a receiving plate detection mechanism matched with the material receiving plate, and the screen detection mechanism comprises an adjusting plate connected with the screening net, a telescopic piece and an adjusting shaft abutting against the adjusting plate; the intelligent screening controller comprises a screening analysis module, a screen regulation and control module and a subdivision module, by the adoption of the structure, the amount and the specification of materials entering the screen can be judged, the materials are controlled to enter the smashing assembly to be smashed and screened again according to requirements, and the amount and the specification of the materials screened out through 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 making recycled concrete sand, which are applied in the technical field of sand making screening. Background Art

[0002] Waste concrete is a type of construction waste. A large amount of waste concrete is generated during new construction, reconstruction, expansion or demolition. If these wastes are not handled properly, they will not only occupy land resources, but also pollute the environment. Through sand making, waste concrete can be converted into sand of different specifications and reused in construction projects, thereby reducing the mining 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 for building concrete slabs, including a box body, on which a sieve plate for screening materials is arranged; the device for preparing recycled sand for building concrete slabs also includes a vibrator for vibrating the box body, and a cleaning device for cleaning the material covered on the sieve plate is arranged on the box body. The damaged concrete material is put into the vibrating box body, and the material is screened through the sieve plate by the vibration of the vibrating box body, and the material is screened into materials of different specifications for use in different types of construction.

[0004] When the above scheme is implemented, the vibration of the vibration box is used to screen the materials into different specifications through the screen plate. When the materials are dumped onto the screen plate, if there are too many materials, they are easy to accumulate at the dumping place, and the materials cannot be screened in time. Moreover, since the uses of materials of different specifications are different, when there are too many materials of a certain specification during the screening process, they cannot be sold or used up in time, which will take up more storage space and affect the recycling efficiency of recycled concrete. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that when materials are dumped onto the screen plate, if there are a lot of materials, they are easily accumulated at the dumping place, and the materials cannot be screened in time. Moreover, since materials of different specifications have different uses, when there are a lot of materials of a certain specification during the screening process, they cannot be sold or used up in time, which will take up more storage space and affect the recycling efficiency of recycled concrete.

[0006] In order to solve the above problems, the present invention provides a screening device for recycled concrete sand making, comprising: A vibration screening chamber, a feeding port is arranged on one side of the top of the vibration screening chamber, a plurality of inclined screening nets are 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 arranged below one end of each screening net close to the feeding port, 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; 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. 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; The screening intelligent controller is installed on the vibration screening chamber. The screening intelligent controller 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 one, the detection component two, 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.

[0007] In the above-mentioned screening device for recycled concrete sand making, the amount and specification of materials entering the screening net can be judged, and the materials can be controlled to enter the crushing component for further crushing and screening according to demand, so that the amount and specification of materials screened by the equipment can meet the engineering requirements.

[0008] As a further improvement of the present application, the inner cavity of the subdivision chamber is provided with a transition chamber located above the crushing chamber, one end of the transition chamber is connected with the material distribution outlet, and the other end of the transition chamber is connected with the inner cavity of the vibration screening chamber through the material distribution inlet, and an adjustable bottom plate is rotatably connected between the top of the crushing chamber and the transition chamber, and 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.

[0009] As a further improvement of the present application, 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.

[0010] As a further improvement of the present application, a detection component 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 is abutted 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 the end of the detection rod. The input end of the screening analysis module is connected to the upper distance sensor signal.

[0011] As another improvement of the present application, detection component two includes a U-shaped elastic pressure measuring chamber two, a pressure regulating tube two installed at one end of the elastic pressure measuring chamber two, and a detection rod two plugged into the other end of the elastic pressure measuring chamber two, the bottom of the pressure shaft abuts against the middle of the elastic pressure measuring chamber two, and a lower distance sensor is provided below the end of the detection rod two away from the elastic pressure measuring chamber two, which is used to detect the position of the two ends of the detection rod, and the input end of the screening analysis module is connected to the lower distance sensor signal.

[0012] As another improved supplement of the present application, 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.

[0013] As another improved supplement of the present application, the bottoms of the elastic pressure measuring chamber 1 and the elastic pressure measuring chamber 2 are fixed to the outer wall of the vibration screening chamber through a supporting bottom plate.

[0014] As another improvement of the present application, 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 an 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.

[0015] As a further improvement and supplement of the present application, a mid-range 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-range sensor signal.

[0016] A screening method of a screening device for regenerated concrete sand making, comprising the following steps: 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 is large and exceeds the engineering requirements, the subdivision module controls the crushing component to work, and 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.

[0017] To summarize, before the large particles of material screened out by the screening net flow into the material distribution outlet, it can be controlled to enter the crushing component for re-crushing. When there are too many large particles of material screened out by the corresponding screening net, the material can be controlled to enter the crushing component for re-crushing and screening, so as to analyze and judge the proportion of the material specifications entering the screening net, and adjust the inclination angle of the screening net accordingly, so as to improve the screening efficiency and the screening effect, and screen out materials of corresponding specifications according to the needs to meet the corresponding construction material needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an overall schematic diagram of the first and second implementation modes of the present application; Figure 2 Schematic diagram of the interior of the screening chamber of the first and second embodiments of the present application; Figure 3 A schematic diagram of another perspective of the interior of the screening chamber of the first and second embodiments of the present application; Figure 4 This is a control principle diagram of the screening intelligent controller according to the first embodiment of the present application; Figure 5 Schematic cross-sectional view of the screening chamber of the first and second embodiments of the present application; Figure 6 Schematic cross-sectional view of the subdividing chamber of the first and second embodiments of the present application; Figure 7 This is a schematic diagram of the adjustable bottom plate after flipping over the first and second embodiments of the present application; Figure 8 This is a schematic diagram of the structure of the screen detection mechanism and the connecting plate detection mechanism of the first and second embodiments of the present application; Fig. 9 This is a control principle diagram of the screening intelligent controller according to the second embodiment of the present application.

[0019] Description of the numbers in the figure: 1. Vibrating screening chamber; 2. Feeding port; 3. Subdividing chamber; 4. Distributing outlet; 5. Screen detection mechanism; 6. Connecting plate detection mechanism; 7. Cam assembly; 8. Crushing spindle; 9. Screening intelligent controller; 10. Screening net; 11. Connecting plate; 12. Guide plate; 13. Distributing inlet; 14. Return outlet; 15. Adjusting plate; 16. Adjusting shaft; 17. Telescopic member; 18. Elastic pressure measuring chamber 1; 19. Supporting bottom plate; 20. Detection chamber; 21. Connecting plate detection plate; 22. Pressing shaft; 23. Elastic pressure measuring chamber 2; 24. Crushing chamber; 25. Pressure measuring liquid; 26. Adjustable bottom plate; 27. Pressure regulating pipe 1; 28. Pressure regulating pipe 2; 29. ​​Detection rod 1; 30. Upper plate; 31. Upper distance sensor; 32. Lower distance sensor; 33. Lower plate; 34. Middle distance sensor; 35. Detection rod 2. DETAILED DESCRIPTION

[0020] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0021] The first implementation method: Figure 1-Figure 8 A screening device for recycled concrete sand making is shown, comprising a vibrating screening chamber 1, a subdividing chamber 3, a material detection mechanism and a screening intelligent controller 9. A feed port 2 is arranged on one side of the top of the vibrating screening chamber 1. A multi-layer inclined screening net 10 is rotatably connected to the inner cavity of the vibrating screening chamber 1. A receiving plate 11 vertically slidably connected to the inner wall of the vibrating screening chamber 1 is arranged below one end of each screening net 10 close to the feed port 2. A guide plate 12 inclined toward the receiving plate 11 is arranged below each screening net 10. The output of each screening net 10 A material distribution outlet 4 is provided at each end, through which the screened material is transported to the storage bin for storage, the material enters the inner cavity of the vibrating screening chamber 1 through the feed port 2, and falls onto the screening net 10, and the vibrating screening chamber 1 vibrates to drive the screening net 10 to screen the material, and the small-sized material after screening falls onto the receiving plate 11 and the guide plate 12 at the bottom, and flows into the next layer of the screening net 10 for screening again, and the material larger than the mesh size of the screening net 10 is discharged through the material distribution outlet 4 along the inclined screening net 10.

[0022] In addition, the subdivision chamber 3 is arranged between the output end of the screening net 10 and the material distribution outlet 4. The subdivision chamber 3 and the output end of each screening net 10 are respectively provided with a crushing chamber 24. A crushing assembly for crushing the material is installed in 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 the return material outlet 14. The material with large particles screened out by the screening net 10 can be controlled to enter the crushing assembly for re-crushing before flowing into the material distribution outlet 4. When the amount of material screened out by the corresponding screening net 10 is too much, part of the material can be controlled to enter the crushing assembly and be crushed and screened again, so that the amount and specification of the material screened by the equipment can meet the engineering requirements.

[0023] It is worth mentioning that see Figure 2 , Figure 5 and Figure 8 The material detection mechanism includes a screen detection mechanism 5 matched with the screening net 10 and a receiving plate detection mechanism 6 matched with the receiving plate 11. The screen detection mechanism 5 includes an adjusting plate 15 connected to the screening net 10, a telescopic member 17, and an adjusting shaft 16 abutting against the adjusting plate 15. The adjusting 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 adjusting shaft 16. The telescopic member 17 is preferably a telescopic motor or a pneumatic cylinder. The adjusting shaft 16 is controlled to move up and down by the telescopic member 17, thereby controlling the adjusting plate 15 to move up and down, thereby adjusting the inclination angle of the screening net 10. The larger the inclination angle of the screening net 10, the higher the screening efficiency, which can reduce the amount of material falling on the screening net. The accumulation degree of materials at one end of the net 10 will be reduced, and the screening effect will be reduced. Smaller particles of materials will flow into the material distribution outlet 4 along the screening net 10 with a larger inclination angle; on the contrary, the smaller the inclination angle of the screening net 10, the lower the screening efficiency, and the better the screening effect. A detection component 1 is provided at the bottom of the mounting seat of the telescopic member 17. The detection component 1 is used to detect the stress state of the telescopic member 17. The material entering the screening net 10 through the feed port 2 will accumulate at its end, and the weight of the material will be transmitted to the detection component 1 through the adjusting plate 15, the adjusting shaft 16 and the telescopic member 17. The amount of material falling into the end of the screening net 10 through the feed port 2 at this time can be detected by the detection component 1.

[0024] In addition, the connecting plate detection mechanism 6 includes a connecting plate detection plate 21 connected to the material connecting plate 11, a pressure shaft 22 fixed to the connecting plate detection plate 21, and a detection component 2 is arranged at the bottom of the pressure shaft 22. The detection component 2 is used to detect the stress state of the pressure shaft 22. When the material falls into the end of the screening net 10, the vibration effect causes more material to be screened through the screening net 10 and quickly fall onto the connecting plate 11 at the bottom. The weight of the material is transmitted to the detection component 2 through the connecting plate detection plate 21 and the pressure shaft 22. The detection component 2 can detect the amount of material falling onto the connecting plate 11, that is, the amount of material falling onto the screening net 10 after screening. By analyzing the amount of material falling onto the connecting plate 11 and the amount of material falling onto the screening net 10, the amount of material falling onto the screening net 10 can be detected. , it is possible to preliminarily judge the distribution data of the particle specifications of the corresponding material. When a large amount of material falls on the screening net 10, it is necessary to adjust the inclination angle of the screening net 10. At the same time, the amount of material after preliminary filtration through the screening net 10 is judged by 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 net 10 can be slightly increased accordingly; conversely, when the amount of material after preliminary filtration through the screening net 10 is judged by 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 net 10, they roll along the surface to the material distribution outlet 4. The inclination angle of the screening net 10 can be increased accordingly, thereby improving the screening efficiency of the corresponding screening net 10 for the large amount of incoming material, and improving the corresponding screening effect.

[0025] In this embodiment, the screening intelligent controller 9 is installed on the vibrating screening chamber 1. The screening intelligent controller 9 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 member 17 signal. The output end of the subdivision module is connected to the crushing component signal. When screening, the material is input into the vibrating screening chamber 1 through the feed port 2 and gradually accumulated at one end of the screening net 10. The vibrating screening chamber 1 drives the screening net 10 to vibrate to screen the material. The detection component 1 detects the bottom of the telescopic member 17. The force data is fed back to the screening analysis module, and the screening analysis module determines the amount of material falling on the screening net 10 according to the force data. When it is judged that the amount of material is large, a judgment signal for increasing the inclination angle of the screening net 10 is given. At the same time, the detection component 1 feeds back the force data of the pressing shaft 22 detected to the screening analysis module, and the screening analysis module determines the amount of material falling on the receiving plate 11 according to the force data. When it is judged that the amount of material is large, the screening analysis module determines that the smaller particles in the particles falling on the screening net 10 account for a large proportion, and the screening analysis module sends a signal to slightly increase the inclination angle to the screen control module, and controls the telescopic member 17 to work and slightly increase the adjustment plate 15 , thereby slightly increasing the inclination angle of the screening mesh 10; when the screening analysis module determines, based on the force data, that the amount of material falling onto the receiving plate 11 is small, it determines that the smaller particles among the particles falling onto the screening mesh 10 account for a small proportion, and at this time, more large particles roll along the screening mesh 10 toward the material distribution outlet 4, and the screening analysis module sends a signal to significantly increase the inclination angle to the screen mesh control module, controls the telescopic member 17 to work and significantly increases the height of the adjusting plate 15, thereby significantly increasing the inclination angle of the screening mesh 10, and at the same time, the screening analysis module compares the amount of material on the receiving plate 11 with the preset minimum amount of material on the receiving plate 11 (the screening analysis module presets the minimum amount of material on the receiving plate 11). When it is judged that the amount of material is less than the minimum amount, it is analyzed that there are more large particles in the material and it exceeds the demand. The screening analysis module will send a segmentation signal to the segmentation module to control the operation of the crushing component to refine and crush part of the material passing through the segmentation chamber 3. The crushed material enters the guide plate 12 at the bottom through the return material outlet 14, and rolls along the guide plate 12 to the screening net 10 at the bottom for screening again, so as to analyze and judge the proportion of the material specifications entering the screening net 10, and adjust the inclination angle of the screening net 10 to improve the screening efficiency and the screening effect, and screen out materials of corresponding specifications according to the demand to meet the corresponding construction material requirements.

[0026] Also, see Figure 6 and Figure 7The inner cavity of the subdivision chamber 3 is provided with a transition chamber located above the grinding chamber 24, one end of the transition chamber is connected with the distribution outlet 4, and the other end of the transition chamber is connected with the inner cavity of the vibration screening chamber 1 through the distribution inlet 13. An adjustable bottom plate 26 is rotatably connected between the top of the grinding chamber 24 and the transition chamber, and a driving member is installed at one end of the adjustable bottom plate 26. The driving member is used to drive the adjustable bottom plate 26 to rotate. The driving member is preferably an electric motor or a pneumatic motor. The output end of the subdivision module is connected with the driving member signal. When the subdivision module controls the grinding of part of the material, part of the material passing through the transition chamber will enter the grinding chamber 24. At this time, the subdivision module controls the driving member to work, and the driving member controls the adjustable bottom plate 26 to flip, so that part of the material passing through the transition chamber falls into the grinding chamber 24 and is crushed by the grinding assembly. Part of the material that has not entered the grinding chamber 24 is discharged through the distribution outlet 4, thereby achieving the purpose of fine grinding of part of the material.

[0027] In addition, the crushing assembly includes a crushing roller installed in the crushing chamber 24, a crushing main shaft 8 connected in series with multiple crushing rollers, and a cam assembly 7 installed on 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 subdivision module is connected to the cam assembly 7 signal. The cam assembly 7 is a common cam mechanism in the prior art, which can automatically drive the crushing main shaft 8 to move up and down. When the subdivision module controls the crushing assembly to work, it will control the cam assembly 7 to work, and drive the crushing main shaft 8 to move up and down, and drive multiple crushing rollers to move up and down in the crushing chamber 24 to crush the material entering the crushing chamber 24. The crushed material flows back to the guide plate 12 through the return material outlet 14 at the bottom, and is transported to the next layer of the screening net 10 for screening again, so that the specifications of the screened materials meet the corresponding construction material requirements.

[0028] The second implementation method: Figure 1-Figure 3 and Figure 8-Figure 9A screening device for recycled concrete sand making is shown, which is different from the first embodiment in that the detection component includes a U-shaped elastic pressure measuring chamber 18, a pressure regulating tube 27 installed at one end of the elastic pressure measuring chamber 18, and a detection rod 29 plugged into the other end of the elastic pressure measuring chamber 18. The bottom of the mounting seat of the telescopic member 17 is in contact with the middle of the elastic pressure measuring chamber 18, and an upper distance sensor 31 is provided above the end of the detection rod 29 away from the elastic pressure measuring chamber 18, which is used to detect the position of the end of the detection rod 29. The input end of the screening analysis module is connected to the signal of the upper distance sensor 31. When the stress state of the bottom of the telescopic member 17 is detected by the detection component, the force applied to the telescopic member 17 will be transmitted to the elastic pressure measuring chamber 18 at the bottom. The outer wall of the elastic pressure measuring chamber 18 is squeezed to compress the inner cavity of the elastic pressure measuring chamber 18, thereby pushing the detection rod 29 to move, and detecting the change in the distance from the upper plate 30 through the upper distance sensor 31, so as to judge the stress state of the telescopic member 17, thereby judging the weight of the material falling on the screening net 10. By setting a 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 to adjust the gas pressure in the inner cavity of the elastic pressure measuring chamber 18, thereby adjusting the degree of change of the elastic pressure measuring chamber 18 after being squeezed by the telescopic member 17, so as to adjust the degree of data change detected by the upper distance sensor 31 and the sensitivity of the detection according to different specifications or amounts of materials.

[0029] Also, see Figure 8 The detection component 2 includes a U-shaped elastic pressure measuring chamber 23, a pressure regulating tube 28 installed at one end of the elastic pressure measuring chamber 23, and a detection rod 35 plugged 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. A lower distance sensor 32 is arranged below one end of the detection rod 35 away from the elastic pressure measuring chamber 23, which is used to detect the position of the end of the detection rod 35. The input end of the screening analysis module is connected to the signal of the lower distance sensor 32. When the stress state of the bottom of the pressing shaft 22 is detected by the detection component 1, the force exerted on the pressing shaft 22 will be transmitted to the elastic pressure measuring chamber 23 at the bottom, squeezing the outer wall of the elastic pressure measuring chamber 23, compressing the elastic The inner cavity of the elastic pressure measuring chamber 23 is formed by the pressure regulating tube 28, thereby pushing the detection rod 23 to move, and detecting the change in the distance from the detection rod 23 to the detection rod 23 is detected by the lower distance sensor 32, so as to judge the stress state of the pressing shaft 22, and thus judge the weight of the material dropped on the receiving plate 11. By setting the pressure regulating tube 28, different amounts of compressed gas can be filled into the end of the elastic pressure measuring chamber 23 away from the detection rod 23 through the pressure regulating tube 28, and the gas pressure in the inner cavity of the elastic pressure measuring chamber 23 can be adjusted, so as to adjust the degree of change of the elastic pressure measuring chamber 23 after being squeezed by the pressing shaft 22, so as to adjust the degree of data change detected by the lower distance sensor 32 and the sensitivity of detection according to different specifications or material quantities of the materials.

[0030] Preferably, both ends of the elastic pressure measuring chamber 18 and the elastic pressure measuring chamber 23 are vertically arranged, and the inner cavities of the elastic pressure measuring chamber 18 and the elastic pressure measuring chamber 23 are filled with pressure measuring fluid 25. Sealing plates are arranged at both ends of the pressure measuring fluid 25. The pressure changing degree of the cavity at both ends of the elastic pressure measuring chamber 18 and the elastic pressure measuring chamber 23 is increased by squeezing the pressure measuring fluid 25, and the detection rod 1 29 and the detection rod 2 35 are pushed to move more sensitively. The sealing plates can limit the flow range of the end of the pressure measuring fluid 25 and reduce its leakage. The bottom of the elastic pressure measuring chamber 18 and the elastic pressure measuring chamber 23 are fixed to the outer wall of the vibration screening chamber 1 through the supporting bottom plate 19, and the elastic pressure measuring chamber 18 and the elastic pressure measuring chamber 23 are installed and fixed.

[0031] In this embodiment, a detection chamber 20 is provided on one side of the elastic pressure measuring chamber 18, and the upper end of the inner cavity of the detection chamber 20 is vertically slidably connected to an upper plate 30 fixed to the end of a detection rod 29, an upper distance sensor 31 is installed at the top of the detection chamber 20 and at a position corresponding to the upper plate 30, and the lower end of the inner cavity of the detection chamber 20 is vertically slidably connected to a lower plate 33 fixed to the end of a detection rod 35, and a lower distance sensor 32 is installed at the bottom of the detection chamber 20 and at a position corresponding to the lower plate 33. After the cavity of the elastic pressure measuring chamber 18 is compressed, the end of the detection rod 29 is driven to move upward, and the other end of the detection rod 29 synchronously drives the upper plate 30 to move upward, and the upper distance sensor 31 can detect the displacement distance of the upper plate 30, thereby accurately analyzing the weight of the material on the screening net 10. Similarly, the displacement of the lower plate 33 at the end of the detection rod 35 is detected by the lower distance sensor 32, thereby accurately analyzing the weight of the material on the receiving plate 11.

[0032] It is worth mentioning that a mid-distance sensor 34 corresponding to the upper plate 30 is installed on the top of the lower plate 33, and the input end of the screening analysis module is connected to the signal of the mid-distance sensor 34. The mid-distance sensor 34 can detect the distance difference between the upper plate 30 and the lower plate 33, so that the difference between the amount of material falling on the screening net 10 and the amount of material falling on the receiving plate 11 after screening by the screening net 10 can be intuitively judged. A large difference (exceeding the preset value in the screening analysis module) indicates that the proportion of small particles in the material is large, and more small particles fall on the receiving plate 11; a small difference (less than the preset value in the screening analysis module) indicates that the proportion of small particles in the material is small, and more large particles roll along the screening net 10 to the material outlet 4, so that the screening analysis module can quickly judge the content of the material falling on the screening net 10 through the distance data received by the mid-distance sensor 34.

[0033] A screening method of a screening device for regenerated concrete sand making, comprising the following steps: S1. Screening: Pour the material into the inner cavity of the vibrating screening chamber 1 through the feed port 2, and screen the material through the screening net 10. The material with a mesh size larger than the mesh size of the screening net 10 rolls along the screening net 10 toward the material outlet 4, and the material with a mesh size smaller than the mesh size of the screening net 10 falls onto the receiving plate 11 and the guide plate 12, and falls onto the screening net 10 of the lower layer along the inclined guide plate 12 for further screening; S2. Control: Analyze the amount of material falling onto the screening net 10 and the amount of material on the receiving plate 11 through the screening analysis module, determine the content of particles of different specifications in the material poured onto the screening net 10, and adjust the inclination angle of the screening net 10 by controlling the telescopic member 17 to work; S3, subdivision: when the screening analysis module determines that the content of the corresponding specification material rolling along the screening net 10 is large and exceeds the engineering requirements, the subdivision module controls the crushing component to work, and finely crushes part of the material rolling along the screening net 10. The finely crushed material flows back to the inner cavity of the vibration screening chamber 1 through the return outlet 14, and is screened by the next layer of the screening net 10; S4, material discharge storage: the materials screened by the different layers of screening nets 10 are discharged through the material distribution outlet 4 and transported to the corresponding storage bin for storage.

[0034] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A screening device for recycled concrete sand making, characterized in that: include: A vibrating screening chamber (1), wherein a feed inlet (2) is arranged on one side of the top of the vibrating screening chamber (1), a plurality of inclined screening nets (10) are rotatably connected to the inner cavity of the vibrating screening chamber (1), a receiving plate (11) vertically slidably connected to the inner wall of the vibrating screening chamber (1) is arranged below one end of each of the screening nets (10) close to the feed inlet (2), a guide plate (12) inclined toward the receiving plate (11) is arranged below each of the screening nets (10), and a material distribution outlet (4) is arranged at the output end of each of the screening nets (10); a subdivision chamber (3), the subdivision chamber (3) being arranged between the output end of the screening net (10) and the material distribution outlet (4), the subdivision chamber (3) and the output end of each screening net (10) being provided with a crushing chamber (24) correspondingly, a crushing assembly for crushing materials being installed in the crushing chamber (24), the output end of the crushing chamber (24) being matched with the input end of the corresponding guide plate (12) through the return material outlet (14); A material detection mechanism, the material detection mechanism comprising a screen detection mechanism (5) matched with the screen mesh (10), and a connecting plate detection mechanism (6) matched with the material connecting plate (11); the screen detection mechanism (5) comprising an adjustment plate (15) connected with the screen mesh (10), a telescopic member (17), and an adjustment shaft (16) abutting against the adjustment plate (15); the adjustment shaft (16) is mounted at the output end of the telescopic member (17); the telescopic member (17) is used to control the movement of the adjustment shaft (16); a detection component 1 is arranged at the bottom of a mounting seat of the telescopic member (17); the detection component 1 is used to detect the stress state of the telescopic member (17); the connecting plate detection mechanism (6) comprises a connecting plate detection plate (21) connected with the material connecting plate (11), and a pressing shaft (22) fixed to the connecting plate detection plate (21); a detection component 2 is arranged at the bottom of the pressing shaft (22); the detection component 2 is used to detect the stress state of the pressing shaft (22); A screening intelligent controller (9), the screening intelligent controller (9) being installed on the vibration screening chamber (1), the screening intelligent controller (9) comprising a screening analysis module, a screen control module and a subdivision module, the input end of the screening analysis module being respectively connected to detection component one, detection component two, the screen control module and the subdivision module signals, the output end of the screen control module being connected to the telescopic member (17) signals, and the output end of the subdivision module being connected to the crushing component signals.

2. A screening device for recycled concrete sand making according to claim 1, characterized in that: The inner cavity of the subdividing chamber (3) is provided with a transition chamber located above the pulverizing chamber (24); one end of the transition chamber is connected to the material distribution outlet (4); the other end of the transition chamber is connected to the inner cavity of the vibration screening chamber (1) through the material distribution inlet (13); an adjustable bottom plate (26) is rotatably connected between the top of the pulverizing chamber (24) and the transition chamber; a driving member is installed at one end of the adjustable bottom plate (26); the driving member is used to drive the adjustable bottom plate (26) to rotate; and the output end of the subdividing module is connected to the driving member signal.

3. A screening device for recycled concrete sand making according to claim 1, characterized in that: The pulverizing assembly comprises a pulverizing roller installed in a pulverizing chamber (24), a pulverizing main shaft (8) connected in series with the plurality of pulverizing rollers, and a cam assembly (7) installed on the top of the pulverizing main shaft (8), wherein the cam assembly (7) is used to drive the pulverizing main shaft (8) to move up and down, and the output end of the subdividing module is connected to the cam assembly (7) by signal.

4. A screening device for recycled concrete sand making according to claim 1, characterized in that: The detection component comprises a U-shaped elastic pressure measuring chamber (18), a pressure regulating tube (27) installed at one end of the elastic pressure measuring chamber (18), and a detection rod (29) plugged 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); an upper distance sensor (31) is provided above the end of the detection rod (29) away from the elastic pressure measuring chamber (18) for detecting the position of the end of the detection rod (29); and the input end of the screening analysis module is connected to the upper distance sensor (31) for signal connection.

5. A screening device for recycled concrete sand making according to claim 4, characterized in that: The second detection component comprises a second elastic pressure measuring chamber (23) in a U-shaped shape, a second pressure regulating tube (28) installed at one end of the second elastic pressure measuring chamber (23), and a second detection rod (35) plugged into the other end of the second elastic pressure measuring chamber (23). The bottom of the pressure shaft (22) abuts against the middle of the second elastic pressure measuring chamber (23). A lower distance sensor (32) is provided below one end of the second detection rod (35) away from the second elastic pressure measuring chamber (23) for detecting the position of the end of the second detection rod (35). The input end of the screening analysis module is connected to the signal of the lower distance sensor (32).

6. A screening device for recycled concrete sand making according to claim 5, characterized in that: Both ends of the elastic pressure measuring chamber 1 (18) and the elastic pressure measuring chamber 2 (23) are arranged vertically, and the inner cavities of the elastic pressure measuring chamber 1 (18) and the elastic pressure measuring chamber 2 (23) are filled with pressure measuring fluid (25), and sealing plates are arranged at both ends of the pressure measuring fluid (25).

7. A screening device for recycled concrete sand making according to claim 6, characterized in that: The bottoms of the first elastic pressure measuring chamber (18) and the second elastic pressure measuring chamber (23) are fixed to the outer wall of the vibration screening chamber (1) via a supporting bottom plate (19).

8. A screening device for recycled concrete sand making according to claim 5, characterized in that: A detection chamber (20) is provided on one side of the elastic pressure measuring chamber (18); the upper end of the inner cavity of the detection chamber (20) is vertically slidably connected to an upper plate (30) fixed to the end of the detection rod (29); the upper distance sensor (31) is installed at the top of the detection chamber (20) at a position corresponding to the upper plate (30); the lower end of the inner cavity of the detection chamber (20) is vertically slidably connected to a lower plate (33) fixed to the end of the detection rod (35); and the lower distance sensor (32) is installed at the bottom of the detection chamber (20) at a position corresponding to the lower plate (33).

9. A screening device for recycled concrete sand making according to claim 8, characterized in that: A mid-distance sensor (34) corresponding to the upper plate (30) is installed on the top of the lower plate (33), and the input end of the screening analysis module is connected to the mid-distance sensor (34) signal.

10. A screening method for a screening device for making recycled concrete sand according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Screening: pouring the material into the inner cavity of the vibrating screening chamber (1) through the feed inlet (2), and screening the material through the screening net (10). The material with a mesh size larger than the mesh size of the screening net (10) rolls along the screening net (10) toward the material outlet (4), and the material with a mesh size smaller than the mesh size of the screening net (10) falls onto the receiving plate (11) and the guide plate (12), and falls along the inclined guide plate (12) onto the screening net (10) at the lower layer, and is screened again. S2, control: analyzing the amount of material falling onto the screening net (10) and the amount of material on the receiving plate (11) through the screening analysis module, determining the content of particles of different specifications in the material poured onto the screening net (10), and adjusting the inclination angle of the screening net (10) by controlling the operation of the telescopic member (17); S3, subdivision: when the screening analysis module determines that the content of the corresponding specification material rolling along the screening net (10) exceeds the engineering requirement, the subdivision module controls the crushing component to operate, and finely crushes part of the material rolling along the screening net (10). The finely crushed material flows back to the inner cavity of the vibration screening chamber (1) through the return outlet (14) and is screened by the screening net (10) of the next layer; S4, material discharge storage: the materials screened by the different layers of screening nets (10) are discharged through the material distribution outlet (4) and transported to the corresponding storage bin for storage.

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