Machine-made sand classification screening device

Abstract

The utility model relates to the technical field of machine-made sand preparation, in particular to a machine-made sand classifying and screening device which comprises a vertical cylinder, a quantitative feeding mechanism, a driving mechanism, a sound insulation mechanism, a classifying screen mechanism, a supporting mechanism and a finished product machine-made sand recycling mechanism. A sound insulation mechanism is arranged on the outer wall of the vertical cylinder, the vertical cylinder is connected with the ground through a supporting mechanism, the classifying screen mechanism comprises screen meshes which are sequentially arranged in the vertical cylinder from top to bottom, a finished product machine-made sand recycling mechanism is connected to the outer wall, where one end of each screen mesh is located, of the vertical cylinder, and the mesh number of the screen meshes is sequentially increased from top to bottom. The top end of the vertical cylinder is connected with a feeding pipe, and the feeding pipe is provided with a quantitative feeding mechanism. The vertical space can be fully utilized, environmental pollution is reduced, the automation level of the device is provided, the screening quality is guaranteed, and multi-level grading screening can be achieved.

Description

Technical Field

[0001] This invention relates to the field of manufactured sand preparation technology, specifically to a manufactured sand grading and screening device. Background Technology

[0002] Manufactured sand typically refers to artificial sand produced by repeatedly crushing and processing crushed stone and gravel into particles smaller than 4.75mm using a sand making machine; it is also known as crushed sand. The grading and screening equipment for manufactured sand usually uses a vibrating screen. Its principle is that the screen plate vibrates continuously under the drive of a vibrator, causing relative movement in the material pile to achieve the purpose of screening. A vibrating screen consists of a vibrating motor, screen mesh, support frame, and vibration isolation devices, and its structure is relatively simple. This type of equipment has the following drawbacks:

[0003] 1. Because the equipment generates vibrations during operation, the foundation requirements are relatively high. The foundation needs to have a certain bearing capacity and stability to ensure the normal operation and safety of the equipment. Additionally, due to vibration, this type of equipment often generates significant noise, affecting environmental comfort.

[0004] 2. Existing manufactured sand screening equipment typically occupies a large area of ​​the ground, while the vertical space utilization rate is not high. For example, the external dimensions of the DZSF quartz sand linear vibrating screen are 2420*1320*1160mm. If the utilization rate of the vertical space of the screening equipment can be improved, it will help save production space for enterprises and enable the screening of manufactured sand with more graded particle sizes.

[0005] 3. Most existing screening equipment uses conveyor belts for feeding, which makes it impossible to accurately control the feed rate, thus hindering the improvement of the automation level of screening equipment. Utility Model Content

[0006] This invention discloses a machine-made sand grading and screening device, the purpose of which is to solve the problems described in 1-3 of the prior art.

[0007] To achieve the above objectives, the technical solution of this invention is as follows:

[0008] A manufactured sand grading and screening device includes a vertical cylinder, a quantitative feeding mechanism, a driving mechanism, a sound insulation mechanism, a grading screen mechanism, a support mechanism, and a finished manufactured sand recovery mechanism. The vertical cylinder is connected to the driving mechanism and rotates under the drive of the driving mechanism. The outer wall of the vertical cylinder is provided with a sound insulation mechanism. The vertical cylinder is connected to the ground through the support mechanism. The grading screen mechanism includes screens arranged sequentially from top to bottom inside the vertical cylinder. The finished manufactured sand recovery mechanism is connected to the outer wall of the vertical cylinder at one end of the screen. The mesh size of the screens increases sequentially from top to bottom. A feed pipe is connected to the top of the vertical cylinder, and the feed pipe is equipped with a quantitative feeding mechanism.

[0009] Preferably, the sound insulation layer on the outer wall of the vertical cylinder is a sound insulation material layer disposed within the sound insulation layer.

[0010] Preferably, the support mechanism includes a workbench, the vertical cylinder is coaxially disposed on the top of the workbench, the bottom end of the vertical cylinder is coaxially provided with an annular slider, the top of the workbench opposite to the annular slider is provided with an annular slide rail, the annular slider and the annular slide rail are slidably connected, the top outer wall surface of the vertical cylinder is coaxially fixedly connected with an annular fixing plate, an annular support plate is provided opposite to the annular fixing plate below the annular fixing plate, the bottom end of the annular fixing plate is rotatably connected to the annular support plate through a thrust bearing, and the bottom of the annular support plate is fixedly connected to the top of the workbench through a support frame.

[0011] Preferably, the support frame includes multiple support plates arranged around the axis of the vertical cylinder, the bottom end of the support plate is fixedly connected to the top end of the workbench, and the top end of the support plate is provided with a cantilever structure arranged radially along the vertical cylinder, the top end of the cantilever structure is fixedly connected to the bottom end of the annular support plate.

[0012] Preferably, the drive mechanism includes a variable frequency servo motor fixedly mounted at the center of the bottom end of the workbench, and the output shaft of the servo motor rotatably passes through the upper surface of the workbench and is fixedly connected to the center of the bottom end of the vertical cylinder.

[0013] Preferably, the screen is an inclined screen structure, and a discharge port is provided on the side wall of the vertical cylinder where the lower end of the screen is located. The finished manufactured sand recycling mechanism includes a discharge pipe located outside the discharge port. The upper end of the discharge pipe is connected to the outer end of the discharge port, and the lower end of the discharge pipe extends vertically downward. A guide pipe passes through the workbench opposite to the lower end of the discharge pipe. The upper end of the guide pipe is provided with a first receiving hopper, and the lower end of the guide pipe is connected to the finished manufactured sand recycling box located on the ground below the workbench.

[0014] Preferably, the outer port of the discharge port is provided with an electric door, which includes an electric push rod fixedly mounted longitudinally on the outer wall of the vertical cylinder. The telescopic end of the electric push rod is fixedly connected to a door panel, which passes through a pre-set through groove on the upper edge of the discharge pipe and is used in conjunction with the discharge port.

[0015] Preferably, the feed pipe is arranged vertically and fixedly connected to the top plate of the vertical cylinder, and a second receiving hopper is provided at the top of the feed pipe.

[0016] Preferably, the quantitative feeding mechanism includes a first insert plate and a second insert plate arranged alternately, one above the other. The feed tube has a rectangular cross-section. The same-side ends of the first and second insert plates are fixedly connected by a U-shaped rod. The length of the arm of the U-shaped rod connected to the first insert plate is greater than the length of the other arm connected to the second insert plate. An electric cylinder is also arranged laterally on the outer wall of the feed tube. The fixed end of the electric cylinder is fixedly connected to the outer wall of the feed tube, and the telescopic end is fixedly connected to the bottom of the U-shaped rod. A first strip groove is formed on the tube wall of the feed tube on the side away from the electric cylinder. The first insert plate is slidably connected to the first strip groove. A second strip groove is formed on the tube wall of the feed tube on the side closer to the electric cylinder. The second insert plate is slidably connected to the second strip groove. Driven by the electric cylinder, when the first insert plate closes the upper part of the feed tube, the second insert plate opens the lower channel of the feed tube. When the second insert plate closes the lower part of the feed tube, the first insert plate opens the upper channel of the feed tube.

[0017] Preferably, the inner or outer wall of the feed pipe is further provided with a guide plate structure for guiding the first or second insert plate. The guide plate structure is composed of two plates arranged opposite each other. The opposite surfaces of the two plates slide in cooperation with the outer surface of the first or second insert plate, and the top of the upper plate forms a ramp structure.

[0018] Preferably, the vertical cylinder has a discharge gate on the side wall below the bottom screen, and the screens are arranged evenly around the axis of the vertical cylinder with different inclination directions.

[0019] The beneficial effects of this novel manufactured sand grading and screening device:

[0020] 1. This new type of device is driven by a servo motor, and the addition of a sound-insulating material layer significantly reduces operating noise and environmental pollution. Furthermore, the screening process is entirely within the vertical cylinder, unlike some open vibrating screens, thus greatly reducing dust pollution; accumulated dust can be periodically removed through the discharge gate.

[0021] 2. This new type of structure improves the overall utilization of vertical space, enabling the screening of more graded manufactured sand particles.

[0022] 3. The quantitative feeding mechanism set in this new type can control the amount of manufactured sand entering the vertical cylinder relatively accurately. Then, the time required for each full screening can be determined through experiments. After the time is met, the electric door can be opened to realize timed processing and timed discharge, effectively improving the automation level of the device. Attached Figure Description

[0023] To more clearly illustrate the technical solution of this invention, the accompanying drawings used in the embodiments are briefly described below, which constitute a part of the specification and are used together with the embodiments of this invention to explain this invention, but do not constitute a limitation on this invention.

[0024] Figure 1 This is a schematic diagram of the cross-sectional structure of this novel invention.

[0025] Figure 2 This is a schematic diagram of a partial cross-sectional structure of this novel invention.

[0026] Figure 3 This is a top view schematic diagram of the structure of this novel invention.

[0027] Figure 4 This is a partial structural diagram of part A of the novel invention.

[0028] Figure 5 This is a partial structural diagram of point C in this novel invention.

[0029] Figure 6 This is a partial structural diagram of part B of the novel structure.

[0030] 1. Workbench; 2. Vertical cylinder; 3. Screen; 4. Support frame; 401. Cantilever structure; 5. Discharge pipe; 6. Guide pipe; 7. Finished manufactured sand recovery box; 8. Servo motor; 9. Second receiving hopper; 10. Annular fixed plate; 11. Thrust bearing; 12. Annular support plate; 13. Annular slide rail; 14. Annular slider; 15. Electric push rod; 16. Discharge port; 17. Door panel; 18. Feed pipe; 19. First insert plate; 20. Second insert plate; 21. U-shaped rod; 22. Electric cylinder; 23. Sloping structure; 24. Guide plate structure; 25. Lower side plate. Detailed Implementation

[0031] The technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0032] The following embodiments can be understood as explaining a partial structure of the present invention individually, or as explaining a larger structure of the present invention through a combination of multiple embodiments.

[0033] Example 1

[0034] A manufactured sand grading and screening device, such as Figure 1-6As shown, the system includes a vertical cylinder 2, a quantitative feeding mechanism, a drive mechanism, a sound insulation mechanism, a grading screen mechanism, a support mechanism, and a finished manufactured sand recovery mechanism. The vertical cylinder 2 is connected to the drive mechanism and rotates under the drive of the drive mechanism. The outer wall of the vertical cylinder 2 is provided with a sound insulation mechanism (a common structure, not shown in the figure). The vertical cylinder 2 is connected to the ground through the support mechanism. The grading screen mechanism includes screens 3 arranged sequentially from top to bottom inside the vertical cylinder. The finished manufactured sand recovery mechanism is connected to the outer wall of the vertical cylinder 2 at one end of the screens 3. The mesh size of the screens 3 increases sequentially from top to bottom. The top of the vertical cylinder 2 is connected to a feed pipe 18, which is equipped with a quantitative feeding mechanism.

[0035] Example 2

[0036] Based on Example 1, such as Figure 1-6 As shown in the figure, this embodiment discloses: the outer wall sound insulation layer of the vertical cylinder 2 (not shown in the figure), and the sound insulation mechanism is a sound insulation material layer disposed within the sound insulation layer. By setting the sound insulation material layer, the noise of the device operation can be significantly reduced, thus reducing environmental pollution. At the same time, the screening process of this novel device is all within the vertical cylinder 2, which differs from the open screening of some vibrating screens, and dust pollution is also greatly reduced.

[0037] Example 3

[0038] Based on embodiment 2, such as Figure 1-6 As shown, this embodiment discloses that the support mechanism includes a workbench 1, a vertical cylinder 2 coaxially disposed on the top of the workbench 1, an annular slider 14 coaxially disposed at the bottom end of the vertical cylinder 2, an annular slide rail 13 disposed at the top end of the workbench 1 opposite to the annular slider 14, the annular slider 14 and the annular slide rail 13 being slidably connected, an annular fixing plate 10 being coaxially fixedly connected to the outer wall surface of the top end of the vertical cylinder 2, an annular support plate 12 being disposed opposite to the annular fixing plate 10, the bottom end of the annular fixing plate 10 being rotatably connected to the annular support plate 12 through a thrust bearing 11, and the bottom of the annular support plate 12 being fixedly connected to the top end of the workbench 1 through a support frame 4.

[0039] like Figure 1-4 As shown, the support frame 4 includes multiple support plates arranged around the axis of the vertical cylinder. The bottom end of the support plate is fixedly connected to the top end of the workbench 1. The top end of the support plate is provided with a cantilever structure 401 arranged radially along the vertical cylinder 2. The top end of the cantilever structure 401 is fixedly connected to the bottom end of the annular support plate 12.

[0040] In this embodiment, although the workbench and support frame also occupy a certain amount of ground space, a finished manufactured sand recycling box is set under the workbench, and the vertical cylinder can make full use of the longitudinal space, thereby improving the overall utilization rate of the longitudinal space and enabling the screening of more graded manufactured sand particles.

[0041] Example 4

[0042] Based on Example 3, such as Figure 1 , 2 As shown in the embodiment, the driving mechanism includes a variable frequency servo motor 8 fixedly disposed at the bottom center of the workbench 1. The output shaft of the servo motor 8 rotatably passes through the upper surface of the workbench 1 and is fixedly connected to the bottom center of the vertical cylinder 2.

[0043] like Figure 1-4 As shown, the screen 3 is an inclined screen structure. The lower end of the screen 3 is provided with a discharge port 16 on the side wall of the vertical cylinder 2. The finished manufactured sand recycling mechanism includes a discharge pipe 5 located outside the discharge port 16. The upper end of the discharge pipe 5 is connected to the outer end of the discharge port 16. The lower end of the discharge pipe 5 extends vertically downward. A guide pipe 6 passes through the workbench 1 opposite to the lower end of the discharge pipe 5. The upper end of the guide pipe 6 is provided with a first receiving hopper (not marked in the figure). The lower end of the guide pipe 6 is connected to the finished manufactured sand recycling box 7 located on the ground below the workbench 1.

[0044] like Figure 1-4 As shown, the outer port of the discharge port 16 is equipped with an electric door. The electric door includes an electric push rod 15 fixedly mounted on the outer wall of the vertical cylinder 2 along the longitudinal direction. The telescopic end of the electric push rod 15 is fixedly connected to a door panel 17. The door panel 17 passes through a pre-set through groove on the upper edge of the discharge pipe 5 and is used in conjunction with the discharge port 16.

[0045] In this embodiment, the servo motor can be driven by instantaneous start-up to rotate the vertical cylinder by a certain angle. At this time, the manufactured sand climbs up the inclined filter screen due to its own inertia and then slides down due to its own gravity, repeating this process to achieve the screening of manufactured sand. Of course, the servo motor can also be selected to rotate at a constant speed. After screening for a certain period of time, the electric push rod retracts, the door plate 17 moves upward, the discharge port opens, and the screened manufactured sand particles enter the finished manufactured sand recycling box 7 along the discharge pipe and guide pipe.

[0046] Example 5

[0047] Based on the above embodiments, such as Figure 4-6 As shown, this embodiment discloses that: the feed pipe 18 is arranged vertically and fixedly connected to the top plate of the vertical cylinder 2, and the top end of the feed pipe 18 is provided with a second receiving hopper 9, which is used to receive the manufactured sand material conveyed by the conveyor belt.

[0048] like Figure 4-6As shown, the quantitative feeding mechanism includes a first insert plate 19 and a second insert plate 20 arranged alternately, one above the other. The feed pipe 18 has a rectangular cross-section. The ends of the first insert plate 19 and the second insert plate 20 on the same side are fixedly connected by a U-shaped rod 21. The length of the arm of the U-shaped rod 21 connected to the first insert plate 19 is greater than the length of the other arm connected to the second insert plate 20. An electric cylinder 22 is also arranged laterally on the outer wall of the feed pipe 18. The fixed end of the electric cylinder 22 is fixedly connected to the outer wall of the feed pipe 18, and the telescopic end is fixedly connected to the bottom of the U-shaped rod 21. The feed pipe 18 is further... A first slot (not shown in the figure) is formed on the pipe wall on the side away from the electric cylinder 22. The first insert plate 19 is slidably connected to the first slot, and enters the feed pipe through the first slot to close the feed pipe. A second slot (not shown in the figure) is formed on the pipe wall of the feed pipe 18 near the electric cylinder 22. The second insert plate 20 is slidably connected to the second slot, and enters the feed pipe through the second slot to close the feed pipe. Under the action of the electric cylinder, when the first insert plate 19 closes the upper part of the feed pipe 18, the second insert plate 20 opens the lower channel of the feed pipe 18 (e.g., ...). Figure 6 As shown), when the first insert plate 19 closes the upper part of the feed pipe 18, the feed pipe achieves quantitative feeding control into the vertical cylinder; when the second insert plate 20 closes the lower part of the feed pipe, the first insert plate 19 opens the upper channel of the feed pipe 18, as shown. Figure 5 As shown, the feed pipe is in the receiving state at this time.

[0049] like Figure 4-6 As shown, the inner or outer wall of the feed pipe 18 is also provided with a guide plate structure 24 for guiding the first insert plate 19 or the second insert plate 20. The guide plate structure 24 is composed of two plates arranged opposite each other. The opposite surfaces of the two plates slide in cooperation with the outer surface of the first insert plate or the second insert plate. The top of the upper plate forms a ramp structure 23. The vertical cylinder 2 is provided with a discharge gate on the side wall below the bottom screen 3. The inclination direction of each screen 3 is different and they are evenly arranged around the axis of the vertical cylinder 2.

[0050] In this embodiment, the guide plate structure 24 provides guidance for the first or second insert plate and also has a supporting effect. The sloping structure 23 can guide the manufactured sand particles to avoid them remaining on the top of the lower side plate 25. By setting a quantitative feeding mechanism, the amount of manufactured sand entering the vertical cylinder can be controlled relatively precisely. Furthermore, the time required for each thorough screening can be determined experimentally, and the electric door can be opened after the time is met to achieve timed processing and timed discharge. Since the mesh size of the screen increases from top to bottom, the finest manufactured sand is intercepted by the screen located at the bottom, while the powder mixed in the manufactured sand can accumulate at the bottom of the vertical cylinder. After a certain period of time, the discharge door (not shown in the figure) at the bottom of the side wall of the vertical cylinder can be opened to remove the powder.

Claims

1. A mechanism sand classifying and screening device, characterized by: The system includes a vertical cylinder, a quantitative feeding mechanism, a drive mechanism, a sound insulation mechanism, a grading screen mechanism, a support mechanism, and a finished manufactured sand recovery mechanism. The vertical cylinder is connected to the drive mechanism and rotates under the drive of the drive mechanism. The outer wall of the vertical cylinder is equipped with a sound insulation mechanism. The vertical cylinder is connected to the ground through the support mechanism. The grading screen mechanism includes screens arranged sequentially from top to bottom inside the vertical cylinder. The finished manufactured sand recovery mechanism is connected to the outer wall of the vertical cylinder at one end of the screen. The mesh size of the screens increases sequentially from top to bottom. The top of the vertical cylinder is connected to a feed pipe, and the feed pipe is equipped with a quantitative feeding mechanism. The feed pipe is arranged vertically and fixedly connected to the top plate of the vertical cylinder, and a second receiving hopper is provided at the top of the feed pipe; The quantitative feeding mechanism includes a first insert plate and a second insert plate arranged alternately, one above the other. The feed tube has a rectangular cross-section. The same-side ends of the first and second insert plates are fixedly connected by a U-shaped rod. The length of the arm of the U-shaped rod connected to the first insert plate is greater than the length of the other arm connected to the second insert plate. An electric cylinder is also arranged laterally on the outer wall of the feed tube. The fixed end of the electric cylinder is fixedly connected to the outer wall of the feed tube, and the telescopic end is fixedly connected to the bottom of the U-shaped rod. A first strip groove is formed on the tube wall of the feed tube on the side away from the electric cylinder. The first insert plate is slidably connected to the first strip groove. A second strip groove is formed on the tube wall of the feed tube on the side closer to the electric cylinder. The second insert plate is slidably connected to the second strip groove. Driven by the electric cylinder, when the first insert plate closes the upper part of the feed tube, the second insert plate opens the lower channel of the feed tube. When the second insert plate closes the lower part of the feed tube, the first insert plate opens the upper channel of the feed tube.

2. A machine-made sand sizing and sorting device as claimed in claim 1, characterized in that: The sound insulation layer on the outer wall of the vertical cylinder, and the sound insulation mechanism is a layer of sound insulation material disposed within the sound insulation layer.

3. A machine-made sand sizing and sorting device as claimed in claim 2, characterized in that: The support mechanism includes a workbench, with the vertical cylinder coaxially mounted on top of the workbench. A ring-shaped slider is coaxially mounted at the bottom of the vertical cylinder, and a ring-shaped slide rail is mounted at the top of the workbench opposite to the ring-shaped slider. The ring-shaped slider and the ring-shaped slide rail are slidably connected. A ring-shaped fixing plate is coaxially fixed to the outer wall surface of the top of the vertical cylinder. A ring-shaped support plate is positioned opposite the ring-shaped fixing plate below it. The bottom of the ring-shaped fixing plate is rotatably connected to the ring-shaped support plate via a thrust bearing. The bottom of the ring-shaped support plate is fixedly connected to the top of the workbench via a support frame. The support frame includes multiple support plates arranged around the axis of the vertical cylinder. The bottom of the support plates is fixedly connected to the top of the workbench. A cantilever structure is provided at the top of the support plates, arranged radially along the vertical cylinder. The top of the cantilever structure is fixedly connected to the bottom of the ring-shaped support plate.

4. A manufactured sand sizing and sorting apparatus as claimed in claim 3, characterised in that: The drive mechanism includes a variable frequency servo motor fixedly mounted at the bottom center of the workbench. The output shaft of the servo motor rotatably passes through the upper surface of the workbench and is fixedly connected to the bottom center of the vertical cylinder.

5. A manufactured sand sizing and sorting apparatus as claimed in claim 4, characterised in that: The screen is an inclined screen structure. A discharge port is provided on the side wall of the vertical cylinder where the lower end of the screen is located. The finished manufactured sand recycling mechanism includes a discharge pipe located outside the discharge port. The upper end of the discharge pipe is connected to the outer end of the discharge port. The lower end of the discharge pipe extends vertically downward. A guide pipe passes through the worktable opposite to the lower end of the discharge pipe. The upper end of the guide pipe is provided with a first receiving hopper. The lower end of the guide pipe is connected to the finished manufactured sand recycling box located on the ground below the worktable.

6. A manufactured sand sizing and sorting apparatus as claimed in claim 5, characterised in that: The discharge port is equipped with an electric door. The electric door includes an electric push rod fixedly mounted on the outer wall of the vertical cylinder along the longitudinal direction. The telescopic end of the electric push rod is fixedly connected to a door panel. The door panel passes through a pre-set through groove on the upper edge of the discharge pipe and is used in conjunction with the discharge port.

7. A machine-made sand sizing and sorting device as claimed in claim 1, characterized in that: The inner or outer wall of the feed pipe is also provided with a guide plate structure for guiding the first or second insert plate. The guide plate structure is composed of two plates arranged opposite each other. The opposite surfaces of the two plates slide in cooperation with the outer surface of the first or second insert plate, and the top of the upper plate forms a ramp structure.

8. A manufactured sand sizing and sorting device as claimed in claim 1, characterized in that: The vertical cylinder has a discharge gate on its side wall below the bottom screen. The screens are inclined in different directions and are evenly arranged around the axis of the vertical cylinder.

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