Sand screening device for building construction

Abstract

The application discloses a sand screening device for building construction, which comprises a shell, a box door hinged to the surface of the shell, a controller fixedly installed on the side wall of the shell, a protective cover hinged to the periphery of the shell, limit plates fixedly and symmetrically installed on the side wall of the shell, the two limit plates being located above the controller, a blocking piece fixedly and symmetrically installed on the upper end of each protective cover, and a first fixed seat fixedly installed on the shell and located above the limit plates.

Description

Technical Field

[0001] This invention relates to the field of building construction, and more particularly to a sand screening device for building construction. Background Technology

[0002] Sand screening devices used in construction are primarily designed to select sand of the appropriate particle size for use in construction projects. Different applications require different sand particle sizes, necessitating a device capable of quickly and accurately selecting the target particle size. Common sand screening devices for construction can be categorized into manual and automatic types. Highly automated devices utilize electrical control systems for automated screening and can be adjusted as needed, offering great convenience. Manual sand screening devices, on the other hand, require manual operation and necessitate a relatively large workforce, but are less expensive and suitable for small-scale construction projects.

[0003] Disadvantages: (1) Existing sand screening devices are often vertical to the bottom surface when in use, and are usually set above the sand screening device. When the sand screening device is conveying materials, it is often difficult to observe.

[0004] (2) In the existing sand screening device, the protective cover is often fixed to the sand screening device with screws. Since each one needs to be tightened, the installation and disassembly are relatively troublesome.

[0005] (3) Existing sand screening devices usually transport all the sand to the screen at once, which can easily damage the screen.

[0006] (4) In the construction industry, materials are often pushed to the ground, which can easily become damp and clump together over time, making them easy to clog during filtration.

[0007] (5) When collecting sand, the existing sand screening device often requires lifting the collection box out of the sand screening device and then using tools to take out the sand in the collection box and place it on a cart. Since there is a lot of sand in the collection box and the mass is relatively dense, it is more tiring to move it, which reduces efficiency. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of existing technologies, such as difficulty in observing the feed inlet when conveying materials to sand screening devices, cumbersome installation and removal of protective covers on sand screening devices, easy damage to the screen when sand is uniformly conveyed into the sand screening device, easy clumping of damp sand causing blockage, and laborious handling of sand collection boxes that reduces efficiency. Therefore, this invention proposes a sand screening device for construction.

[0009] To address the shortcomings of existing sand screening devices, such as difficulty in observing the feed inlet during material transport, cumbersome installation and removal of protective covers, potential damage to the screen when sand is transported directly into the device, clogging caused by damp sand, and laborious and inefficient handling of the sand collection box, this invention adopts the following technical solution: A sand screening device for construction, comprising a shell, a door hinged to the surface of the shell, a controller fixedly installed on the side wall of the shell, protective covers hinged around the perimeter of the shell, and limit plates symmetrically fixedly installed on the side wall of the shell. The limiting plates are all located above the controller. Each protective cover has a blocking block symmetrically fixedly installed on its upper end. Each blocking block has a first spring symmetrically fixedly installed on its upper end. Each set of first springs has a locking block fixedly installed on its upper end. The upper end of the housing has a first fixing seat symmetrically fixedly installed. Each first fixing seat has a blocking groove on its surface. Each blocking groove is adapted to the blocking block. Each blocking groove has a locking slot on its inner wall. Each locking slot is adapted to the locking block. The upper end of the housing has a first motor fixedly installed. The output shaft of the first motor has a first gear fixedly installed. The upper end of the housing has a first fixing frame symmetrically fixedly installed.

[0010] Each of the first fixed frames in each group is rotatably equipped with a meshing mechanism;

[0011] The meshing mechanism includes a second gear, and a first fixing block is fixedly installed on the circumferential surface of each of the two second gears. A conveying box is fixedly installed on the upper end of each of the two first fixing blocks. A side box is fixedly installed on the side wall of the conveying box. A base is fixedly installed on the lower end of the side box. A first placement groove is opened inside the base. A partition is fixedly installed inside the first placement groove. A first sliding groove is symmetrically opened inside the partition.

[0012] Preferably, a first cylinder is fixedly installed on the upper end of the partition, and a second fixing bracket is symmetrically fixedly installed on the output shaft of the first cylinder. Both second fixing brackets are slidably installed with the first sliding groove. A first baffle is slidably installed inside the first placement groove. The first baffle is fixedly installed with the second fixing bracket. A feed pipe is fixedly installed on the upper end of the housing.

[0013] Preferably, a first rotating rod is rotatably installed inside the housing, a lever is fixedly installed on the side wall of the first rotating rod, a hollow column is fixedly installed on the circumferential surface of the first rotating rod, a feed groove is opened inside the hollow column, and a second fixing seat is fixedly installed on the side wall of the housing.

[0014] Preferably, a second motor is fixedly installed on the upper end of the second fixed base, a disc is rotatably installed on the side wall of the housing, the disc is fixedly installed with the output shaft of the second motor, a first fixed column is fixedly installed on the side wall of the disc, a shaped block is fixedly installed on the side wall of the first rotating rod away from the lever, and a second placement groove is symmetrically opened on the inner wall of the housing.

[0015] Preferably, multiple second springs are symmetrically fixedly installed inside each of the two second placement slots, and a placement frame is fixedly installed at the upper end of each set of second springs. A first fixing plate is hinged to the surface of each of the two placement frames, and screws are threaded into the interior of each of the two first fixing plates. Multiple second sliding grooves are provided on the side wall of the housing, and a second fixing plate is slidably installed inside each of the second sliding grooves.

[0016] Preferably, each of the second fixing plates is fixedly installed with the placement frame, a second fixing post is fixedly installed at the upper end of each of the second fixing plates, a third fixing plate is fixedly installed at the upper end of each of the second fixing posts, a transmission plate is fixedly installed at the upper end of the third fixing plate, the transmission plate is adapted to the toggle block, and a sieve box is slidably installed between the two placement frames.

[0017] Preferably, a screen is fixedly installed inside the screen box, and threaded holes are symmetrically opened on the surface of the screen box. Both threaded holes are threaded with screws. A second cylinder is symmetrically fixedly installed inside the housing. A transmission box is provided at the upper end of each of the two second cylinders. A second rotating rod is rotatably installed inside each of the two transmission boxes. Both second rotating rods are rotatably installed with the second cylinder.

[0018] Preferably, a rotating component is rotatably mounted on the upper end of each of the two transmission boxes, and a third sliding groove is symmetrically opened on the inner wall of the housing. Both of the third sliding grooves are located below the second placement groove. A slider is slidably mounted inside each of the two third sliding grooves, and a collection box is fixedly mounted between the two sliders. A U-shaped frame is symmetrically fixedly mounted on the lower end of the collection box, and a third rotating rod is rotatably mounted inside each of the two U-shaped frames.

[0019] Preferably, a fourth rotating rod is rotatably mounted on the circumferential surface of each of the two third rotating rods, and both fourth rotating rods are rotatably mounted with the rotating component. A fifth rotating rod is rotatably mounted inside the housing and is rotatably mounted with the collection box. A U-shaped groove is provided at the lower end of the collection box, and a third motor is fixedly mounted on the inner wall of the U-shaped groove.

[0020] Preferably, a sixth rotating rod is fixedly installed on the output shaft of the third motor, and multiple blades are fixedly installed on the circumferential surface of the sixth rotating rod. A fourth sliding groove is opened inside the collection box, and a third cylinder is fixedly installed inside the fourth sliding groove. A discharge chute is opened inside the collection box, and a second baffle is provided inside the discharge chute. The second baffle is fixedly installed with the output shaft of the third cylinder.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The controller controls the first motor to make the first gear mesh with the second gear, thereby adjusting the angle of the conveyor box and the side box when conveying sand, making it easier to observe the feeding process and also saving labor.

[0023] 2. The protective cover is flipped over to allow the blocking block and the locking block to engage with the blocking groove and the locking groove. Both the locking block and the locking groove have rounded corners, so the protective cover can be fixed on the first fixing seat simply by flipping it clockwise or counterclockwise, making installation and disassembly convenient.

[0024] 3. By controlling the second motor, the first fixed column on the disc rotates the irregular block. Since the irregular block is driven only by the first fixed column, the irregular block drives the first rotating rod to move intermittently, so that the feed chute on the hollow column stops in the direction of the feed pipe and the screen respectively, thereby intermittently transferring sand and avoiding sand from entering the shell at the same time, causing blockage and damage to the screen and screen box;

[0025] 4. The rotation of the first rotating rod drives the paddle block to press the transmission plate, which causes the second spring under the screen box to vibrate up and down, thereby preventing the sand in the screen from clogging the screen due to clumping, thus improving efficiency;

[0026] 5. By starting the second cylinder, the collection box rotates around the fifth rotating rod as the center, thus tilting the collection box at a certain angle. By starting the third motor, the sixth rotating rod drives the blades to rotate, allowing the sand to be transported through the discharge chute more easily, thereby improving efficiency. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation. In the drawings:

[0028] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0029] Figure 2 This is a three-dimensional exploded view of the present invention;

[0030] Figure 3 This is an exploded view of the first gear connection of the present invention;

[0031] Figure 4 This is an exploded view of the side box connection of the present invention;

[0032] Figure 5 This is an exploded view of the hollow column connection of the present invention;

[0033] Figure 6 This is an exploded view of the second fixing column connection of the present invention;

[0034] Figure 7 This is an exploded view of the rotating component connection of the present invention;

[0035] Figure 8 This is an exploded view of the sixth rotating rod connection of the present invention.

[0036] In the diagram, the following components are listed: 11. Shell; 12. Door; 13. Controller; 14. Protective cover; 15. Limiting plate; 16. Block; 17. First spring; 18. Locking block; 19. First fixed seat; 21. Blocking groove; 22. Locking groove; 23. First motor; 24. First gear; 25. First fixed frame; 26. Second gear; 27. First fixed block; 28. Conveying box; 29. ​​Side box; 31. Base; 32. First placement groove; 33. Partition plate; 34. First sliding groove; 35. First cylinder; 36. Second fixed frame; 37. First baffle; 38. Feed pipe; 39. First rotating rod; 41. Pulley; 42. Hollow column; 43. Feed groove; 44. Second fixed seat; 45. Second motor; 46. Disc; 47. First fixed column ; 48. Irregularly shaped block; 49. Second placement groove; 51. Second spring; 52. Placement frame; 53. First fixing plate; 54. Screw; 55. Second sliding groove; 56. Second fixing plate; 57. Second fixing column; 58. Third fixing plate; 59. Transmission plate; 61. Screen box; 62. Screen mesh; 63. Threaded hole; 64. Second cylinder; 65. Transmission box; 66. Second rotating rod; 67. Rotating component; 68. Third sliding groove; 69. Sliding block; 71. Collection box; 72. U-shaped frame; 73. Third rotating rod; 74. Fourth rotating rod; 75. Fifth rotating rod; 76. U-shaped groove; 77. Third motor; 78. Sixth rotating rod; 79. Blade; 81. Fourth sliding groove; 82. Third cylinder; 83. Discharge chute; 84. Second baffle. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0038] Example 1: To achieve the goals of adjusting the angle of the conveyor box and side box, facilitating the installation and removal of the protective cover, and preventing sand from entering the housing at the same time and causing blockages and damage to the screen and screen box, this example provides a sand screening device for construction. See [link to example]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 Specifically, a sand screening device for construction includes a housing 11, a door 12 hinged to the surface of the housing 11, a controller 13 fixedly installed on the side wall of the housing 11, protective covers 14 hinged around the perimeter of the housing 11, limit plates 15 symmetrically fixedly installed on the side wall of the housing 11, both limit plates 15 being located above the controller 13, a blocking block 16 symmetrically fixedly installed on the upper end of each protective cover 14, and a first spring 17 symmetrically fixedly installed on the upper end of each blocking block 16. The upper end of each set of first springs 17... Each part is fixedly installed with a locking block 18. The upper end of the housing 11 is symmetrically fixedly installed with a first fixing seat 19. Each first fixing seat 19 has a blocking groove 21 on its surface. Each blocking groove 21 is adapted to the blocking block 16. Each blocking groove 21 has a locking groove 22 on its inner wall. Each locking groove 22 is adapted to the locking block 18. The upper end of the housing 11 is fixedly installed with a first motor 23. The output shaft of the first motor 23 is fixedly installed with a first gear 24. The upper end of the housing 11 is symmetrically fixedly installed with a first fixing frame 25.

[0039] Each set of first fixed frames 25 is rotatably equipped with a meshing mechanism;

[0040] The meshing mechanism includes second gears 26. First fixing blocks 27 are fixedly mounted on the circumferential surfaces of both second gears 26. Conveyor boxes 28 are fixedly mounted on the upper ends of both first fixing blocks 27. Side boxes 29 are fixedly mounted on the side walls of the conveyor boxes 28. A base 31 is fixedly mounted on the lower end of the side boxes 29. A first placement groove 32 is formed inside the base 31. A partition 33 is fixedly mounted inside the first placement groove 32. First sliding grooves 34 are symmetrically formed inside the partition 33. A first cylinder 35 is fixedly mounted on the upper end of the partition 33. Second fixing brackets 36 are symmetrically fixedly mounted on the output shaft of the first cylinder 35. Both second fixing brackets 36 are slidably mounted with the first sliding grooves 34. A first baffle 37 is slidably mounted inside the first placement groove 32. The first baffle 37 is slidably mounted with the second fixing bracket. The frame 36 is fixedly installed. The feed pipe 38 is fixedly installed at the upper end of the housing 11. The first rotating rod 39 is rotatably installed inside the housing 11. The paddle block 41 is fixedly installed on the side wall of the first rotating rod 39. The hollow column 42 is fixedly installed on the circumferential surface of the first rotating rod 39. The feed groove 43 is opened inside the hollow column 42. The second fixed seat 44 is fixedly installed on the side wall of the housing 11. The second motor 45 is fixedly installed at the upper end of the second fixed seat 44. The disc 46 is rotatably installed on the side wall of the housing 11. The disc 46 is fixedly installed with the output shaft of the second motor 45. The first fixed column 47 is fixedly installed on the side wall of the disc 46. The irregular block 48 is fixedly installed on the side wall of the first rotating rod 39 away from the paddle block 41. The second placement groove 49 is symmetrically opened on the inner wall of the housing 11.

[0041] In use, firstly, the controller 13 can be controlled to start the first motor 23 to rotate forward. The starting of the first motor 23 will drive the first gear 24 to rotate, which will then mesh with the second gear 26. The rotation of the second gear 26 will cause the conveyor box 28 to rotate counterclockwise, as the conveyor box 28 is fixedly mounted on the second gear 26 via the first fixing block 27. When the conveyor box 28 rotates counterclockwise to 45 degrees to the second motor, the controller 13 stops controlling the first motor 23. Then, workers can use a shovel to feed sand into the conveyor box 28. After the sand is fed in, the controller 13 can be controlled to start the first motor 23 in reverse, directly... When the second gear 26 rotates clockwise to 60 degrees, the controller 13 will stop controlling the first motor 23. Then, the protective cover 14 can be rotated counterclockwise until the block 16 on the protective cover 14 is in contact with the surface of the first fixed seat 19. At this point, the locking block 18 will retract. Because the locking block 18 is fixed to the block 16 by the first spring 17, and the first spring 17 has a stretching characteristic, the protective cover 14 can be rotated counterclockwise further. When the locking block 18 contacts the slot 22, the first spring 17 will reset, causing the locking block 18 to engage inside the slot 22, thus fixing the protective cover 14 to the first fixed seat 19. To release the fixation, simply rotate the block clockwise... Block 16, because both the locking block 18 and the locking slot 22 have rounded corners, allows the first spring 17 to retract again, thereby releasing the protective cover 14 from fixing the first fixed seat 19. Then, the controller 13 can be controlled to open the retraction of the first cylinder 35. At this time, since the first baffle 37 is fixedly installed on the output shaft of the first cylinder 35 via the second fixing bracket 36, the first baffle 37 will slide within the first sliding groove 34 until the first fixing block 27 completely enters the first placement groove 32. At this time, the sand will fall downwards into the feed pipe 38 due to gravity and enter the feed trough 43 opened within the hollow column 42. At this time, the controller 13 can control the second motor 45 to rotate forward. The rotation of the second motor 45 will cause the first rotating rod 39 to move intermittently. This is because the irregularly shaped block 48 fixedly installed on the first rotating rod 39 is driven by the first fixed column 47 on the disc 46. When the disc 46 rotates once, the first fixed block 27 will contact the irregularly shaped block 48 and push it to rotate. The rotation of the irregularly shaped block 48 will cause the first rotating rod 39 to rotate inside the housing 11. Every time the disc 46 rotates once, the irregularly shaped block 48 will rotate half a turn, thereby causing the hollow column 42 on the first rotating rod 39 to stop at two positions in the direction of the feed pipe 38 and the screen box 61, thus intermittently conveying the sand conveyed in the feed pipe 38.

[0042] In the specific implementation process, such as Figure 1 and Figure 3As shown, the controller 13 controls the first motor 23 to make the first gear 24 mesh with the second gear 26, thereby adjusting the angle of the conveyor box 28 and the side box 29 when conveying sand. This makes it easier to observe the sand filling status during feeding and also saves more effort.

[0043] In the specific implementation process, such as Figure 1 and Figure 2 As shown, by flipping the protective cover 14, the blocking block 16 and the locking block 18 are engaged into the blocking groove 21 and the locking groove 22. Both the locking block 18 and the locking groove 22 are rounded, so the protective cover 14 can be fixed on the first fixing seat 19 simply by flipping it clockwise and counterclockwise, which makes installation and disassembly convenient.

[0044] In the specific implementation process, such as Figure 1 and Figure 5 As shown, by controlling the second motor 45, the first fixed column 47 on the disc 46 rotates the irregular block 48. Since the irregular block 48 is driven only by the first fixed column 47, the irregular block 48 drives the first rotating rod 39 to move intermittently. This causes the feed chute 43 on the hollow column 42 to stop in the direction of the feed pipe 38 and the screen 62, thereby intermittently transferring sand. This avoids sand from entering the shell 11 at the same time, causing blockage and damage to the screen 62 and the screen box 61. Example

[0045] In Example 1, there is also the problem that damp sand easily clogs the screen. See [link to example]. Figure 6 , Figure 7 and Figure 8 Therefore, based on Embodiment 1, this embodiment also includes a second placement slot 49. Multiple second springs 51 are symmetrically fixedly installed inside each of the two second placement slots 49. A placement frame 52 is fixedly installed at the upper end of each set of second springs 51. A first fixing plate 53 is hinged to the surface of each of the two placement frames 52. Screws 54 are threaded into the interior of each of the two first fixing plates 53. Multiple second sliding grooves 55 are provided on the side wall of the housing 11. A second fixing plate 56 is slidably installed inside each second sliding groove 55. Plates 56 are fixedly installed to the placement frames 52. A second fixing post 57 is fixedly installed on the upper end of each second fixing plate 56. A third fixing plate 58 is fixedly installed on the upper end of each second fixing post 57. A transmission plate 59 is fixedly installed on the upper end of the third fixing plate 58. The transmission plate 59 is compatible with the lever block 41. A sieve box 61 is slidably installed between the two placement frames 52. A sieve screen 62 is fixedly installed inside the sieve box 61. Threaded holes 63 are symmetrically opened on the surface of the sieve box 61. Both threaded holes 63 are threaded with screws 54.

[0046] The sieve box 61 can then be slid inward within the placement frame 52. When the rear surface of the sieve box 61 slides into the inner wall of the placement frame 52, the first fixing plate 53 can be reversed upward. Then, the screw 54 can be turned clockwise in the threaded hole 63 of the first fixing plate 53 to fix the sieve box 61 onto the placement frame 52. At this time, due to the rotation of the first rotating rod 39, the lever 41 on the first rotating rod 39 will also rotate. Since the lever 41 is compatible with the transmission plate 59, the rotation of the lever 41 will generate a pushing force on the transmission plate 59, causing the sieve box 61 to vibrate up and down within the second placement groove 49. At this time, it is fixed on the placement frame 52, which is fixedly installed in the second placement groove 49 by the second spring 51. Since the second fixing plate 56 is fixedly installed on the side wall of the placement frame 52 on the same side as the first fixing plate 53, and the second fixing plate 56, the second fixing column 57 and the third fixing plate 58 are fixedly installed, the rotation of the toggle block 41 will cause the sieve box 61 to vibrate up and down in the second placement groove 49. At the same time, the second fixing plate 56 will slide up and down in the second sliding groove 55. At this time, the sand remaining on the sieve 62 will be screened due to the vibration of the sieve box 61, and then the sand will fall into the collection box 71.

[0047] In the specific implementation process, such as Figure 1 and Figure 6 As shown, the rotation of the first rotating rod 39 drives the paddle block 41 to squeeze the transmission plate 59, thereby causing the second spring 51 below the sieve box 61 to vibrate up and down, thus preventing the sand in the sieve 62 from clogging the sieve 62 due to clumping, thereby improving efficiency.

[0048] Example 3: In Example 2, there is still a problem that the sand in the collection box is not easy to transfer. Specifically, the working principle and operation method of the present invention are as follows: It includes a second cylinder 64, and a transmission box 65 is provided at the upper end of each of the two second cylinders 64. A second rotating rod 66 is rotatably installed inside each of the two transmission boxes 65. The two second rotating rods 66 are rotatably installed with the second cylinder 64. A rotating component 67 is rotatably installed at the upper end of each of the two transmission boxes 65. A third sliding groove 68 is symmetrically opened on the inner wall of the housing 11. The two third sliding grooves 68 are located below the second placement groove 49. A slider 69 is slidably installed inside each of the two third sliding grooves 68. A collection box 71 is fixedly installed between the two sliders 69. A U-shaped frame 72 is symmetrically fixedly installed at the lower end of the collection box 71. A third sliding component 67 is rotatably installed inside each of the two U-shaped frames 72. A rotating rod 73 is rotatably mounted on the circumferential surface of two third rotating rods 73. Both fourth rotating rods 74 are rotatably mounted with rotating component 67. A fifth rotating rod 75 is rotatably mounted inside the housing 11. The fifth rotating rod 75 is rotatably mounted with the collection box 71. A U-shaped groove 76 is opened at the lower end of the collection box 71. A third motor 77 is fixedly mounted on the inner wall of the U-shaped groove 76. A sixth rotating rod 78 is fixedly mounted on the output shaft of the third motor 77. Multiple blades 79 are fixedly mounted on the circumferential surface of the sixth rotating rod 78. A fourth sliding groove 81 is opened inside the collection box 71. A third cylinder 82 is fixedly mounted inside the fourth sliding groove 81. A discharge groove 83 is opened inside the collection box 71. A second baffle 84 is set inside the discharge groove 83. The second baffle 84 is fixedly mounted with the output shaft of the third cylinder 82.

[0049] After the sand screening is completed, the box door 12 can be flipped outwards, and then the controller 13 can be used to open the second cylinder 64. At this time, the slider 69 will slide in the third slide groove 68, and the collection box 71 will rotate around the fifth rotating rod 75. As the second cylinder 64 is opened, the output shaft of the second cylinder 64 and the transmission box 65 are rotatably mounted through the second rotating rod 66, and the transmission box 65 and the fourth rotating rod 74 are rotatably mounted through the rotating part 67. The second cylinder 64 is rotatably mounted on the U-shaped frame 72. Through multiple rotational installations, the collection box 71 can drive the slider 69 to slide in the third slide groove 68. Then, the staff can place the cart on the second baffle 84 of the collection box 71, and then open the collection box 71. At this time, the opening of the collection box 71 will cause the blade 79 on the sixth rotating rod 78 to rotate. Due to the installation angle of the blade 79, it will continuously push the filtered sand in the collection box 71 towards the second baffle 84. At this time, the controller 13 can be controlled to open the third cylinder 82 to rise. At this time, the third cylinder 82 will drive the second baffle 84 to slide in the discharge chute 83. Then, due to the rotation of the blade 79, the sand will be conveyed along the U-shaped chute 76 to the discharge chute 83, and the sand will fall into the cart.

[0050] In the specific implementation process, such as Figure 1 and Figure 7 and Figure 8 As shown, by starting the second cylinder 64, the collection box 71 is driven to rotate around the fifth rotating rod 75 as the center, thereby tilting the collection box 71 at a certain angle. Furthermore, by starting the third motor 77, the sixth rotating rod 78 drives the blade 79 to rotate, so that the sand can be easily transported through the discharge chute 83, thereby improving efficiency.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art based on the technical solution and concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sand screening device for construction, comprising a housing (11), wherein a door (12) is hinged to the surface of the housing (11), a controller (13) is fixedly installed on the side wall of the housing (11), a protective cover (14) is hinged around the perimeter of the housing (11), limit plates (15) are symmetrically fixedly installed on the side wall of the housing (11), both limit plates (15) are located above the controller (13), a blocking block (16) is symmetrically fixedly installed at the upper end of each protective cover (14), a first spring (17) is symmetrically fixedly installed at the upper end of each blocking block (16), a locking block (18) is fixedly installed at the upper end of each set of first springs (17), and a first fixing seat (19) is symmetrically fixedly installed at the upper end of the housing (11), characterized in that, Each of the first fixing seats (19) has a blocking groove (21) on its surface, each blocking groove (21) is adapted to the blocking block (16), each blocking groove (21) has a slot (22) on its inner wall, each slot (22) is adapted to the slot block (18), a first motor (23) is fixedly installed on the upper end of the housing (11), a first gear (24) is fixedly installed on the output shaft of the first motor (23), and a first fixing frame (25) is symmetrically fixedly installed on the upper end of the housing (11). Each of the first fixed frames (25) in each group is rotatably mounted with an engagement mechanism; The meshing mechanism includes a second gear (26), and a first fixing block (27) is fixedly installed on the circumferential surface of each of the two second gears (26). A conveyor box (28) is fixedly installed on the upper end of each of the two first fixing blocks (27). A side box (29) is fixedly installed on the side wall of the conveyor box (28). A base (31) is fixedly installed on the lower end of the side box (29). A first placement groove (32) is opened inside the base (31). A partition (33) is fixedly installed inside the first placement groove (32). A first sliding groove (34) is symmetrically opened inside the partition (33). A first cylinder (35) is fixedly installed on the upper end of the partition (33). A second fixing bracket (36) is symmetrically fixedly installed on the output shaft of the first cylinder (35). Both second fixing brackets (36) are slidably installed with the first sliding groove (34). A first baffle (37) is slidably installed inside the first placement groove (32). The first baffle (37) and the second fixing bracket are slidably installed with each other. (36) Fixed installation: A feed pipe (38) is fixedly installed at the upper end of the housing (11). A first rotating rod (39) is rotatably installed inside the housing (11). A lever (41) is fixedly installed on the side wall of the first rotating rod (39). A hollow column (42) is fixedly installed on the circumferential surface of the first rotating rod (39). A feed groove (43) is opened inside the hollow column (42). A second fixed seat (44) is fixedly installed on the side wall of the housing (11). A second motor (45) is fixedly installed at the upper end of the second fixed seat (44). A disc (46) is rotatably installed on the side wall of the housing (11). The disc (46) is fixedly installed with the output shaft of the second motor (45). A first fixed column (47) is fixedly installed on the side wall of the disc (46). A shaped block (48) is fixedly installed on the side wall of the first rotating rod (39) away from the lever (41). A second placement groove (49) is symmetrically opened on the inner wall of the housing (11).

2. The sand screening device for construction as described in claim 1, characterized in that: Multiple second springs (51) are symmetrically fixedly installed inside the two second placement slots (49). A placement frame (52) is fixedly installed at the upper end of each set of second springs (51). A first fixing plate (53) is hinged to the surface of each of the two placement frames (52). Screws (54) are threaded inside the two first fixing plates (53). Multiple second sliding grooves (55) are opened on the side wall of the housing (11). A second fixing plate (56) is slidably installed inside each second sliding groove (55).

3. A sand screening device for construction as described in claim 2, characterized in that: Each of the second fixing plates (56) is fixedly installed with the placement frame (52). A second fixing post (57) is fixedly installed at the upper end of each of the second fixing plates (56). A third fixing plate (58) is fixedly installed at the upper end of each of the second fixing posts (57). A transmission plate (59) is fixedly installed at the upper end of the third fixing plate (58). The transmission plate (59) is adapted to the lever (41). A sieve box (61) is slidably installed between the two placement frames (52).

4. A sand screening device for construction as described in claim 3, characterized in that: A screen (62) is fixedly installed inside the sieve box (61). Threaded holes (63) are symmetrically opened on the surface of the sieve box (61). Both threaded holes (63) are threaded with screws (54). A second cylinder (64) is symmetrically fixedly installed inside the housing (11). A transmission box (65) is provided at the upper end of each of the two second cylinders (64). A second rotating rod (66) is rotatably installed inside each of the two transmission boxes (65). Both second rotating rods (66) are rotatably installed with the second cylinder (64).

5. A sand screening device for construction as described in claim 4, characterized in that: Rotating components (67) are rotatably mounted on the upper ends of both transmission boxes (65). The inner wall of the housing (11) is symmetrically provided with third sliding grooves (68). Both third sliding grooves (68) are located below the second placement groove (49). Sliding blocks (69) are slidably mounted inside both third sliding grooves (68). A collection box (71) is fixedly mounted between the two sliding blocks (69). A U-shaped frame (72) is symmetrically fixedly mounted on the lower end of the collection box (71). A third rotating rod (73) is rotatably mounted inside both U-shaped frames (72).

6. A sand screening device for construction as described in claim 5, characterized in that: Two third rotating rods (73) are rotatably mounted with fourth rotating rods (74) on their circumferential surfaces. Both fourth rotating rods (74) are rotatably mounted with rotating parts (67). A fifth rotating rod (75) is rotatably mounted inside the housing (11). The fifth rotating rod (75) is rotatably mounted with the collection box (71). A U-shaped groove (76) is provided at the lower end of the collection box (71). A third motor (77) is fixedly mounted on the inner wall of the U-shaped groove (76).

7. A sand screening device for building construction as described in claim 6, characterized in that: A sixth rotating rod (78) is fixedly installed on the output shaft of the third motor (77). Multiple blades (79) are fixedly installed on the circumferential surface of the sixth rotating rod (78). A fourth sliding groove (81) is provided inside the collection box (71). A third cylinder (82) is fixedly installed inside the fourth sliding groove (81). A discharge chute (83) is provided inside the collection box (71). A second baffle (84) is provided inside the discharge chute (83). The second baffle (84) is fixedly installed on the output shaft of the third cylinder (82).

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