A construction site sand screening device and sand screening method thereof

Abstract

The present invention provides a construction site sand screening device and a sand screening method thereof, comprising a shell, a pair of first annular plates arranged in parallel are fixedly connected to the left and right sides of the shell, the left and right side walls of the shell are each provided with a first through hole for the pair of first annular plates to pass through, a pair of second annular plates arranged in parallel are fixedly connected to the front and back sides of the shell, the front and rear side walls of the shell are each provided with a second through hole for the pair of second annular plates to pass through, an arc-shaped screen mesh that can rotate circumferentially is installed between the pair of first annular plates, the arc-shaped screen mesh is composed of three screen meshes with different apertures butted head to tail, and a discharge port is provided at the butt joint, a roller that can rotate circumferentially is installed between the pair of second annular plates, and a plurality of receiving boxes are fixedly connected to the circumferential side walls of the roller. The device can quickly switch screen meshes with different apertures to realize a graded sand screening process, and can automatically complete the sand receiving and sand loading processes.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a construction site sand screening device and a sand screening method thereof. Background Art

[0002] Sand is an essential basic raw material in the construction field. There are many impurities in the sand, such as gravel, garbage, etc., and the sand particles in the sand are also divided into different grades. Different uses require different sand particle sizes. Therefore, the sand needs to be screened before use.

[0003] The sand screening machines in the prior art are not convenient for replacing screens with different screen holes according to the purpose, and the sand after screening can only be poured on the ground. When in use, it is manually shoveled into a cart or a sand bucket or sandbag, and transported to the corresponding construction site for use, which greatly reduces the construction efficiency. Summary of the invention

[0004] In view of the above problems, the present invention provides a construction site sand screening device, which can quickly switch screens with different apertures to achieve a graded sand screening process and can automatically complete the sand receiving and loading processes.

[0005] To solve the above problems, the technical solution adopted by the present invention is:

[0006] 14. The foldable conveyor belt according to claim 13, wherein the first and second side walls of the housing are provided with a plurality of first and second through-holes for passing the first and second through-holes, respectively.

[0007] Preferably, an upper hopper is fixedly connected to the inner top of the shell above the arc-shaped screen, and a discharge hopper is fixedly connected to the shell below the arc-shaped screen. The mouth of the upper hopper is a front-to-back rectangular mouth, and the mouth of the discharge hopper is a round mouth.

[0008] Preferably, arc-shaped guard plates are fixedly connected to the front and rear sides of the arc-shaped screen.

[0009] Preferably, the opposite side walls of the pair of first annular plates are circumferentially connected to the first gear ring, and the front and rear two arc-shaped guard plates are fixedly connected to the first gear rings on the corresponding sides, and a first motor is fixedly installed on the outer side of one of the first annular plates, and the output end of the first motor is fixedly connected to the first gear, and the first gear is meshed with the first gear ring.

[0010] Preferably, a second gear ring is fixedly connected to the rear circumferential edge of the drum, a second motor is fixedly installed on the second annular plate at the rear side, a second gear is fixedly connected to the end of the output shaft of the second motor, and the second gear is meshed with the second gear ring.

[0011] Preferably, the bottom of the receiving box is open, and the opening and closing mechanism includes an opening and closing door elastically installed at the opening, and also includes a liftable magnetic attraction component installed at the bottom of the shell.

[0012] Preferably, arc grooves are provided on both sides of the opening, sliders are elastically installed in the arc grooves through springs, the opening and closing door is fixedly connected between the two sliders, and a strip opening for the opening and closing door to pass through is provided on one side of the bottom of the material receiving box.

[0013] Preferably, the magnetic attraction assembly includes a cylinder installed at the bottom of the shell, the telescopic end of the cylinder is fixedly connected to a first magnetic block, and the bottom of the end of the opening and closing door away from the strip-shaped opening is fixedly connected to a second magnetic block that cooperates with the first magnetic block.

[0014] Preferably, a loading slide is installed on the rear side of the shell, and a loading end of the loading slide is fixedly connected to a third magnetic block that cooperates with the second magnetic block.

[0015] The present invention also discloses a method for screening sand at a construction site, comprising the following specific steps:

[0016] S1. To select a screen with a desired aperture, simply start the first motor to drive the first gear to rotate, drive the arc-shaped guard plate to rotate through the first gear ring, and then drive the arc-shaped screen to rotate, and move the screen with the desired aperture into the housing;

[0017] S2, start the second motor to drive the second gear to rotate, and then drive the roller to rotate through the second gear ring, and then drive the receiving box to rotate counterclockwise through the feeding slide. Under the action of magnetic attraction, the third magnetic block and the second magnetic block pull the opening and closing door open, and the sand is poured into the corresponding receiving box through the feeding slide. When it turns to the top, the sand falls into the shell through the discharge port and falls onto the corresponding screen through the upper hopper;

[0018] S3, the first motor rotates back and forth quickly, thereby driving the arc-shaped screen to rotate back and forth in a small range, and the screened fine sand is discharged through the discharge hopper and falls into the empty receiving box at the bottom for collection;

[0019] S4. Start the cylinder to drive the first magnetic block to rise, so that it is attached to the second magnetic block located at the bottom of the receiving box directly below. Under the action of magnetic attraction, the receiving box rotates to automatically open the door. At this time, the receiving trolley can be pushed into the bottom of the shell through the inlet and outlet to complete the receiving process.

[0020] The beneficial effects of the present invention are:

[0021] 1. By installing the arc screen, the arc screen is composed of three screens with different apertures connected head to tail. When switching, you only need to start the first motor, drive the first gear ring to rotate through the first gear, and then drive the arc screen to rotate through the arc guard plate. The screen with the required aperture can be transferred to the inside of the shell. The conversion is convenient, and the first motor can also realize a fast forward and reverse rotation process, thereby driving the arc screen to rotate left and right in a small range to realize the sand screening process.

[0022] 2. By setting a discharge port at the joint of the three screens, after screening the sand several times, turn the adjacent discharge port to the bottom, and the screened stones or larger gravel can be automatically discharged through the discharge port without manual cleaning.

[0023] 3. By installing the drum and multiple receiving boxes, starting the second motor, the drum can be driven to rotate circumferentially through the second gear and the second gear ring, thereby driving multiple receiving boxes to intermittently rotate into the shell to receive sand. After receiving the sand, the receiving box can continue to rotate to the top, and an arc-shaped baffle plate is provided to prevent the sand in the receiving box from leaking. When it is rotated to the discharge port, the sand can be graded and screened by converting the arc-shaped screen.

[0024] 4. By installing the opening and closing mechanism, the cylinder is started to drive the first magnetic block to rise, so that it is close to the second magnetic block located at the bottom of the receiving box directly below. Under the action of magnetic attraction, the receiving box rotates to automatically open the opening and closing door. At this time, the receiving trolley can be pushed into the bottom of the shell through the inlet and outlet to complete the material receiving process. This process can also pull the screened stones and other impurities out of the shell. When the receiving box is turned to the upper rear position, the opening and closing door is automatically opened under the action of the magnetic attraction of the third and second magnetic blocks. At this time, sand can be poured into the receiving box through the loading slide, and then the receiving box is turned to the top to complete the automatic loading process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 is a cross-sectional view of the present invention;

[0027] Figure 3 A front view of the first annular plate at the rear side proposed by the present invention;

[0028] Figure 4 It is the cross-sectional view at AA proposed by the present invention;

[0029] Figure 5 A front view of a second annular plate provided by the present invention;

[0030] Figure 6 This is a schematic diagram of the internal structure of the arc groove proposed in the present invention.

[0031] In the figure: 1 first annular plate, 2 housing, 3 inlet and outlet, 4 second annular plate, 5 first motor, 6 second motor, 7 second gear, 8 roller, 9 receiving box, 10 second gear ring, 11 second through-hole, 12 arc screen, 13 first gear, 14 first gear ring, 15 arc guard plate, 16 discharge port, 17 loading hopper, 18 discharge hopper, 19 first through-hole, 20 cylinder, 21 first magnetic block, 22 opening and closing door, 23 second magnetic block, 24 arc-shaped baffle plate, 25 discharge port, 26 loading slide, 27 third magnetic block, 28 arc groove, 29 spring, 30 slider. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0034] Reference Figure 1-6 A construction site sand screening device comprises a shell 2, a pair of first annular plates 1 arranged in parallel are fixedly connected to the left and right sides of the shell 2 upward, the left and right side walls of the shell 2 are each provided with a first through-hole 19 for the pair of first annular plates 1 to pass through, a pair of second annular plates 4 arranged in parallel are fixedly connected to the front and rear sides of the shell 2 upward, the front and rear side walls of the shell 2 are each provided with a second through-hole 11 for the pair of second annular plates 4 to pass through, a circumferentially rotatable arc screen 12 is installed between the pair of first annular plates 1, and the front and rear sides of the arc screen 12 are fixedly connected with arc guard plates 15 to prevent sand from leaving the screen during the screening process.

[0035] Furthermore, the opposite side walls of a pair of first annular plates 1 are connected to the first gear ring 14 in a circumferentially rotatable manner, and the front and rear arc-shaped guard plates 15 are fixedly connected to the first gear ring 14 on the corresponding side. A first motor 5 is fixedly installed on the outer side of one of the first annular plates 1, and the output end of the first motor 5 is fixedly connected to the first gear 13. The first gear 13 is meshed with the first gear ring 14. The first motor 5 is started to drive the first gear 13 to rotate, and the arc-shaped guard plate 15 is driven to rotate through the first gear ring 14, and then the arc-shaped screen 12 is driven to rotate, and the screen with the required aperture is transferred into the shell 2.

[0036] The arc screen 12 is made of three screens with different apertures butted end to end, and each joint is provided with a discharge port 16. After the arc screen 12 screens sand multiple times, the adjacent discharge port 16 is turned to the bottom, and the screened stones or larger gravel can be automatically discharged through the discharge port without manual cleaning.

[0037] A circumferentially rotatable roller 8 is installed between a pair of second annular plates 4, a plurality of material receiving boxes 9 are fixedly connected to the circumferential side walls of the roller 8, a second gear ring 10 is fixedly connected to the rear circumferential edge of the roller 8, a second motor 6 is fixedly installed on the rear second annular plate 4, a second gear 7 is fixedly connected to the end of the output shaft of the second motor 6, the second gear 7 is meshed with the second gear ring 10, and the second motor 6 is started to drive the second gear 7 to rotate, and then the roller 8 is driven to rotate through the second gear ring 10.

[0038] An opening and closing mechanism is installed at the bottom of the material receiving box 9, and the bottom of the material receiving box 9 is open. The opening and closing mechanism includes an opening and closing door 22 elastically installed at the opening, and also includes a liftable magnetic attraction component installed at the bottom of the shell 2. Arc grooves 28 are provided on both sides of the opening, and sliders 30 are elastically installed in the arc grooves 28 through springs 29. The opening and closing door 22 is fixedly connected between the two sliders 30. A strip opening for the opening and closing door 22 to pass through is provided on one side of the bottom of the material receiving box 9. The magnetic attraction component includes a cylinder 20 installed at the bottom of the shell 2, and a first magnetic block 21 is fixedly connected to the telescopic end of the cylinder 20. A second magnetic block 23 cooperating with the first magnetic block 21 is fixedly connected to the bottom of the end of the opening and closing door 22 away from the strip opening. The opening and closing process of the opening and closing door 22 during the rotation process can be controlled by magnetic attraction, thereby realizing the automatic sand receiving and sand loading process.

[0039] The front and rear side walls of the shell 2 are fixedly connected with an arc-shaped material baffle plate 24 that spans the top of the shell 2. The arc-shaped material baffle plate 24 is located on the inner side of multiple material receiving boxes 9 and is used to seal the box opening of the material receiving box 9 that is rotated out of the shell 2. A discharge port 25 is provided at the top of the arc-shaped material baffle plate 24, and an inlet and outlet 3 is provided on the bottom front side of the shell 2.

[0040] Furthermore, an upper hopper 17 is fixedly connected to the inner top of the shell 2 above the arc-shaped screen 12, and a discharge hopper 18 is fixedly connected to the shell 2 below the arc-shaped screen 12. The mouth of the upper hopper 17 is a front-to-back rectangular mouth, which allows sand to fall onto the screen in the front-to-back direction, and cooperates with the left and right movement of the screen to achieve a uniform screening process. The mouth of the discharge hopper 18 is a round mouth.

[0041] Furthermore, a loading chute 26 is installed on the rear side of the shell 2, and the loading end of the loading chute 26 is fixedly connected to the third magnetic block 27 that cooperates with the second magnetic block 23. The receiving box 9 rotates counterclockwise through the loading chute 26, and the third magnetic block 27 and the second magnetic block 23 pull the opening and closing door 22 out of the strip mouth under the action of magnetic attraction, thereby opening the bottom of the receiving box 9. At this time, the sand is poured into the corresponding receiving box 9 through the loading chute 26.

[0042] The present invention also discloses a method for screening sand at a construction site, comprising the following specific steps:

[0043] S1. Select the screen with the required aperture. Just start the first motor 5 to drive the first gear 13 to rotate, drive the arc guard plate 15 to rotate through the first gear ring 14, and then drive the arc screen 12 to rotate, and move the screen with the required aperture into the housing 2;

[0044] S2, start the second motor 6 to drive the second gear 7 to rotate, and then drive the roller 8 to rotate through the second gear ring 10, and then drive the receiving box 9 to rotate counterclockwise through the feeding chute 26. The third magnetic block 27 and the second magnetic block 23 open the opening and closing door 22 under the action of magnetic attraction, and the sand is poured into the corresponding receiving box 9 through the feeding chute 26. When it turns to the top, the sand falls into the housing 2 through the discharge port 25, and falls onto the corresponding screen through the upper hopper 17;

[0045] S3, the first motor 5 rotates back and forth quickly, thereby driving the arc-shaped screen 12 to rotate back and forth in a small range, and the screened fine sand is discharged through the discharge hopper 18 and falls into the empty receiving box 9 at the bottom for collection;

[0046] S4, start the cylinder 20 to drive the first magnetic block 21 to rise, so that it is close to the second magnetic block 23 located at the bottom of the material receiving box 9 directly below. Under the action of magnetic attraction, the material receiving box 9 rotates to automatically open the door. At this time, the material receiving trolley can be pushed into the bottom of the shell 2 through the inlet and outlet 3 to complete the material receiving process.

[0047] To select a screen with a desired aperture, it is only necessary to start the first motor 5 to drive the first gear 13 to rotate, drive the arc guard plate 15 to rotate through the first gear ring 14, and then drive the arc screen 12 to rotate, so as to transfer the screen with the desired aperture into the housing 2.

[0048] The second motor 6 is started to drive the second gear 7 to rotate, and then the drum 8 is driven to rotate through the second gear ring 10, thereby driving the receiving box 9 to rotate counterclockwise through the feeding chute 26. The third magnetic block 27 and the second magnetic block 23 pull the opening and closing door 22 out of the strip mouth under the action of magnetic attraction, and then open the bottom of the receiving box 9. At this time, the sand is poured into the corresponding receiving box 9 through the feeding chute 26. The arc-shaped baffle plate 24 provided blocks the box mouth of the receiving box 9 to prevent sand leakage. When it is turned to the top, the sand falls into the shell 2 through the discharge port 25 and falls onto the corresponding screen through the upper hopper 17. At this time, the first motor 5 (servo motor) rotates back and forth quickly, thereby driving the arc-shaped screen 12 to rotate back and forth left and right in a small range (the rotation range will not exceed the discharge ports 16 on both sides), and the sieved fine sand is discharged through the discharge hopper 18 and falls into the empty receiving box 9 at the bottom for collection.

[0049] The sieved sand can be further sieved by simply turning to the top again to load the material and turning the sieve with a smaller aperture into the housing 2 to complete the multi-stage sieving process.

[0050] After the curved screen 12 has screened the sand for many times, the adjacent discharge port 16 is turned to the bottom, and the screened stones or larger gravels can be automatically discharged through the discharge port without manual cleaning.

[0051] When the sieved sand is selected for use, it is only necessary to start the cylinder 20 to drive the first magnetic block 21 to rise, so that it is close to the second magnetic block 23 located at the bottom of the receiving box 9 directly below. Under the action of magnetic attraction, the receiving box 9 rotates to automatically open the opening and closing door. At this time, the receiving trolley can be pushed into the bottom of the shell 2 through the inlet and outlet 3 to complete the material receiving process. This process can also pull the sieved stones and other impurities out of the shell 2.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction site sand screening device, comprising a housing (2), characterized in that: A pair of first annular plates (1) arranged in parallel are fixedly connected to the left and right sides of the shell (2) upwardly, and the left and right side walls of the shell (2) are each provided with a first through-hole (19) for the pair of first annular plates (1) to pass through. A pair of second annular plates (4) arranged in parallel are fixedly connected to the front and rear sides of the shell (2) upwardly, and the front and rear side walls of the shell (2) are each provided with a second through-hole (11) for the pair of second annular plates (4) to pass through. The bottoms of the pair of first annular plates (1) pass through the pair of second annular plates (4). The pair of first annular plates (1) and the pair of second annular plates (4) are in a cross-shaped buckling state. A circumferentially rotatable arcuate screen (12) is installed between the pair of first annular plates (1). The arcuate screen (12) Three screens with different apertures are butted end to end, and a discharge port (16) is provided at each butt joint. A circumferentially rotatable roller (8) is installed between the pair of second annular plates (4). A plurality of receiving boxes (9) are fixedly connected to the circumferential side walls of the roller (8). An opening and closing mechanism is installed at the bottom of the receiving box (9). An arc-shaped material baffle plate (24) spanning the top of the shell (2) is fixedly connected to the front and rear side walls of the shell (2). The arc-shaped material baffle plate (24) is located on the inner side of the plurality of receiving boxes (9) and is used to block the box opening of the receiving box (9) that is rotated out of the shell (2). A discharge port (25) is provided at the top of the arc-shaped material baffle plate (24). An inlet and outlet (3) is provided at the front side of the bottom of the shell (2). The bottom of the receiving box (9) is open, and the opening and closing mechanism includes an opening and closing door (22) elastically mounted at the opening, and also includes a liftable magnetic attraction component mounted at the bottom of the housing (2). Both sides of the open portion are provided with arc-shaped grooves (28), a slide block (30) is elastically mounted in the arc-shaped groove (28) via a spring (29), the opening and closing door (22) is fixedly connected between the two slide blocks (30), and a strip opening for the opening and closing door (22) to pass through is provided on one side of the bottom of the material receiving box (9). The magnetic attraction assembly comprises a cylinder (20) mounted on the bottom of the housing (2); a first magnetic block (21) is fixedly connected to the telescopic end of the cylinder (20); a second magnetic block (23) cooperating with the first magnetic block (21) is fixedly connected to the bottom of the end of the opening and closing door (22) away from the strip-shaped opening; A loading slideway (26) is installed on the rear side of the housing (2), and a third magnetic block (27) that cooperates with the second magnetic block (23) is fixedly connected to a loading end of the loading slideway (26).

2. A construction site sand screening device according to claim 1, characterized in that: An upper hopper (17) is fixedly connected to the inner top of the shell (2) above the arc-shaped screen (12), and a discharge hopper (18) is fixedly connected to the inner top of the shell (2) below the arc-shaped screen (12). The hopper opening of the upper hopper (17) is a front-to-back rectangular opening, and the hopper opening of the discharge hopper (18) is a round opening.

3. A construction site sand screening device according to claim 2, characterized in that: The front and rear sides of the arc-shaped screen (12) are both fixedly connected with arc-shaped guard plates (15).

4. A construction site sand screening device according to claim 3, characterized in that: The opposite side walls of the pair of first annular plates (1) are both circumferentially connected to a first gear ring (14); the front and rear arc-shaped guard plates (15) are both fixedly connected to the first gear ring (14) on the corresponding side; a first motor (5) is fixedly mounted on the outer side of one of the first annular plates (1); an output end of the first motor (5) is fixedly connected to a first gear (13); and the first gear (13) is meshed with the first gear ring (14).

5. A construction site sand screening device according to claim 4, characterized in that: A second gear ring (10) is fixedly connected to the rear circumferential edge of the roller (8), a second motor (6) is fixedly mounted on the second annular plate (4) at the rear, a second gear (7) is fixedly connected to the end of the output shaft of the second motor (6), and the second gear (7) is meshed with the second gear ring (10).

6. A sand screening method based on the construction site sand screening device according to claim 5, characterized in that: The specific steps include: S1. To select a screen with a desired aperture, the first motor (5) is started to drive the first gear (13) to rotate, which in turn drives the arc-shaped guard plate (15) to rotate through the first gear ring (14), and then drives the arc-shaped screen (12) to rotate, so that the screen with the desired aperture is transferred into the housing (2); S2, start the second motor (6) to drive the second gear (7) to rotate, and then drive the roller (8) to rotate through the second gear ring (10), thereby driving the receiving box (9) to rotate counterclockwise through the feeding slide (26), and the third magnetic block (27) and the second magnetic block (23) open the opening and closing door (22) under the action of magnetic attraction, and the sand is poured into the corresponding receiving box (9) through the feeding slide (26). When it rotates to the top, the sand falls into the housing (2) through the discharge port (25), and falls onto the corresponding screen through the feeding hopper (17); S3, the first motor (5) rotates rapidly back and forth, thereby driving the arc-shaped screen (12) to rotate back and forth in a small range, and the screened fine sand is discharged through the discharge hopper (18) and falls into the empty receiving box (9) at the bottom for collection; S4, the air cylinder (20) is started to drive the first magnetic block (21) to rise, so that it is attached to the second magnetic block (23) located at the bottom of the material receiving box (9) directly below. Under the action of magnetic attraction, the material receiving box (9) rotates to automatically open the door. At this time, the material receiving trolley can be pushed into the bottom of the shell (2) through the inlet and outlet (3), and the material receiving process can be completed.

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