Foldable sand screening device

Abstract

The utility model discloses a foldable sand screening device which comprises a screening frame, a screening net, a bottom output assembly, a first connecting shaft, a supporting frame, a second connecting shaft and a connecting rod. The screening frame is of a frame type structure, and the screening net is detachably embedded in the screening frame. The two sides of one end of the screening frame are rotationally connected with one ends of the pair of supporting frames through first connecting shafts correspondingly, the two sides of the other end of the screening frame are rotationally connected with one ends of the pair of connecting rods through second connecting shafts correspondingly, and the other ends of the pair of supporting frames are detachably connected with the other ends of the pair of connecting rods correspondingly. The screening frame, the pair of supporting frames and the pair of connecting rods form a triangular support structure, so that the screening net is obliquely arranged. The bottom output assembly is installed at the lower end of the screening frame, and a feeding port of the bottom output assembly faces the lower end of the screening net. The utility model relates to the technical field of civil engineering, and can solve the problem that a gravel screening device in the prior art is large and heavy.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering, in particular to a foldable sand screening device. Background Art

[0002] Reinforced concrete is the main material in civil engineering. Among them, sand and gravel are indispensable raw materials in the composition of concrete. For concretes with different design strengths, the graded sand and gravel have different particle sizes, and it is necessary to screen the sand and gravel correspondingly before preparing the concrete slurry to ensure that the prepared concrete can meet the usage requirements.

[0003] Chinese Utility Model Patent CN214132653U discloses a sand and gravel screening device, which includes a frame. A drum rotatably connected to the frame is provided on the frame. A plurality of first screening holes are formed in the side wall of the drum. A receiving tray located below the frame is provided on the frame. A screening cylinder provided on the frame is communicated with the bottom of the receiving tray. A rotating cylinder rotatably connected to the screening cylinder is coaxially provided in the screening cylinder. A communicating component communicated with the receiving tray is provided on the rotating cylinder. A plurality of second screening holes with diameters smaller than the first screening holes are formed in the rotating cylinder. An outlet is formed below the axis of the screening cylinder. A driving component for driving the drum to rotate and a power component for driving the rotating cylinder to rotate are also provided on the frame.

[0004] The existing sand and gravel screening devices are large in volume and heavy in weight, which are very inconvenient for handling and transportation, and also occupy a relatively large space in storage. Therefore, it is necessary to provide a foldable sand screening device that can solve the problems of large size and heavy weight of the existing sand and gravel screening devices. Summary of the Invention

[0005] The purpose of the utility model is to provide a foldable sand screening device that can solve the problems of large size and heavy weight of the existing sand and gravel screening devices.

[0006] The utility model is realized as follows:

[0007] A foldable sand screening device includes a screening frame, a screening net, a bottom output component, a first connecting shaft, a support frame, a second connecting shaft and a connecting rod; the screening frame is of a frame structure, and the screening net is detachably installed in the screening frame; both sides at one end of the screening frame are rotatably connected to one end of a pair of support frames through the first connecting shaft respectively, both sides at the other end of the screening frame are rotatably connected to one end of a pair of connecting rods through the second connecting shaft respectively, the other ends of the pair of support frames are detachably connected to the other ends of the pair of connecting rods respectively, and the screening frame, the pair of support frames and the pair of connecting rods form a triangular support structure, so that the screening net is inclined; the bottom output component is installed at the low end of the screening frame, and the feed inlet of the bottom output component faces the low end of the screening net.

[0008] The described bottom output component includes a conveying pipe, a driving motor, and a screw conveyor shaft; the conveying pipe is a hollow tubular structure with openings at both ends, the screw conveyor shaft is coaxially arranged inside the conveying pipe, the driving motor is installed at one opening of the conveying pipe, and the output shaft of the driving motor is coaxially and fixedly connected to one end of the screw conveyor shaft. The other end of the conveying pipe serves as the discharge port of the bottom output component.

[0009] An opening is formed in the upper part of the described conveying pipe, and the opening serves as the feed port of the bottom output component and is arranged facing the lower end of the screening mesh.

[0010] The described opening is arranged along the length direction of the conveying pipe, and the length of the opening is not less than the width of the screening mesh.

[0011] On each of the described support frames, several fixed shafts are formed at intervals on the side close to the connecting rod, and several card slots are formed at intervals on the side of the connecting rod close to the support frame. The diameter of the fixed shaft is smaller than the width of the card slot, so that one of the fixed shafts can be clamped in one of the card slots, and the other end of the connecting rod is detachably connected to the other end of the support frame.

[0012] The described card slot is in an inverted U-shaped structure and penetrates downward through the connecting rod, so that the connecting rod is placed on one of the fixed shafts of the support frame.

[0013] A limiting block is formed at the end of the fixed shaft away from the support frame. The diameter of the limiting block is larger than the width of the card slot, and the axial length of the fixed shaft is larger than the thickness of the connecting rod, so that the connecting rod is clamped between the support frame and the limiting block.

[0014] Compared with the prior art, the present utility model has the following beneficial effects:

[0015] 1. Since the present utility model is provided with a screening frame, a first connecting shaft, a support frame, a second connecting shaft, and a connecting rod, a triangular support structure is formed by connecting the screening frame, a pair of support frames, and a pair of connecting rods through a pair of first connecting shafts and second connecting shafts. The screening mesh is inclined, and the inclination angle of the screening mesh can be flexibly adjusted by rotating a pair of support frames and a pair of connecting rods to meet the screening use requirements of sand and gravel; at the same time, the screening frame, a pair of support frames, and a pair of connecting rods can be flexibly rotated and folded through a pair of first connecting shafts and second connecting shafts, minimizing the volume of the entire device to a great extent and making it more convenient for storage, transportation, and handling.

[0016] 2. The whole of the present utility model adopts a frame structure, with a small volume, simple structure, light weight, more time-saving and labor-saving during transportation and handling, and high placement stability on the ground. It can be applied to the screening of materials such as sand and gravel in fields such as civil engineering, and has a wide range of applications.

[0017] 3. Since the utility model is provided with a fixed shaft and a clamping groove, the support frame and the connecting rod are connected through the clamping connection between the clamping groove and the fixed shaft, so that the erection of the triangular support structure is simpler, more efficient, convenient to disassemble and assemble, and easy to use.

[0018] 4. Since the utility model is provided with a bottom output component, the sand and gravel screened by the screening net fall onto the bottom surface inside the triangular support structure, and the remaining sand and gravel slide to the low end of the screening net and enter the conveying pipe through the opening. The driving motor drives the spiral conveying shaft to rotate to output the sand and gravel, which greatly facilitates the manual collection of sand and gravel with different particle sizes and makes the sand and gravel screening operation more time-saving and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the left axonometric view of the foldable sand screening device of the utility model;

[0020] Figure 2 is the right axonometric view of the foldable sand screening device of the utility model;

[0021] Figure 3 is the perspective view of the foldable sand screening device of the utility model from the side view angle;

[0022] Figure 4 is the side sectional view of the foldable sand screening device of the utility model;

[0023] Figure 5 is the perspective view of the connecting rod in the foldable sand screening device of the utility model.

[0024] In the figure, 1. Screening frame; 2. Screening net; 3. Conveying pipe; 4. Driving motor; 5. Spiral conveying shaft; 6. Opening; 7. First connecting shaft; 8. Support frame; 9. Fixed shaft; 10. Limiting block; 11. Second connecting shaft; 12. Connecting rod; 13. Clamping groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following further describes the utility model in conjunction with the drawings and specific embodiments.

[0026] Please refer to Attached Figure 1 to Attached Figure 4, A foldable sand screening device, comprising a screening frame 1, a screening mesh 2, a bottom output component, a first connecting shaft 7, a support frame 8, a second connecting shaft 11 and a connecting rod 12; the screening frame 1 is of a frame structure, and the screening mesh 2 is detachably embedded in the screening frame 1; both sides of one end of the screening frame 1 are rotatably connected to one end of a pair of support frames 8 through the first connecting shaft 7 respectively, both sides of the other end of the screening frame 1 are rotatably connected to one end of a pair of connecting rods 12 through the second connecting shaft 11 respectively, the other ends of the pair of support frames 8 are detachably connected to the other ends of the pair of connecting rods 12 respectively, and the screening frame 1, the pair of support frames 8 and the pair of connecting rods 12 form a triangular support structure, making the screening mesh 2 inclined; the bottom output component is installed at the low end of the screening frame 1, and the feed inlet of the bottom output component faces the low end of the screening mesh 2.

[0027] The screening frame 1, the support frame 8 and the connecting rod 12 can be made of materials such as lightweight and high-strength aluminum alloy. The frame-type lightweight structure makes the handling and transportation of the entire device more labor-saving. The triangular support structure formed by the screening frame 1, the pair of support frames 8 and the pair of connecting rods 12 has high structural stability and can ensure the placement stability of the entire device when screening sand and gravel.

[0028] Preferably, plug-in sharp corners can be detachably screwed at the ends of the screening frame 1 and the support frame 8 placed on the ground, so that the plug-in sharp corners can be inserted into the ground soil after installation, further improving the placement stability of the entire device and being applicable to soft ground. If the device is used on hard ground such as concrete, anti-slip pads can be provided at the ends of the screening frame 1 and the support frame 8 placed on the ground to play an anti-slip role.

[0029] The first connecting shaft 7 and the second connecting shaft 11 can meet the 360° flexible rotation between the screening frame 1, the support frame 8 and the connecting rod 12, and can be unfolded to form triangular support structures at different angles, so that the inclination angle of the screening mesh 2 is more convenient for screening operations. At the same time, the screening frame 1, the support frame 8 and the connecting rod 12 can be flexibly rotated to a folded state, minimizing the volume of the entire device and being more convenient for storage, handling and transportation.

[0030] The specifications of the screening mesh 2 can be adaptively selected according to actual screening requirements to ensure that the screened sand and gravel meet the particle size requirements for use. The screening mesh 2 can be detachably embedded in the screening frame 1 by means of buckles, binding, etc., which is convenient for replacing different specifications of the screening mesh 2 according to screening requirements. After screening the sand and gravel by the inclined screening mesh 2, sand and gravel of different particle sizes respectively fall onto the bottom surface below the inner side of the triangular support structure and slide to the low end of the outer side of the screening mesh 2, so as to collect different sand and gravel respectively.

[0031] Please refer to Appendix Figure 1 to Appendix Figure 4, the bottom output component includes a delivery pipe 3, a driving motor 4, and a spiral conveyor shaft 5; the delivery pipe 3 is a hollow tubular structure with openings at both ends, the spiral conveyor shaft 5 is coaxially arranged inside the delivery pipe 3, the driving motor 4 is installed at one opening of the delivery pipe 3, and the output shaft of the driving motor 4 is coaxially and fixedly connected to one end of the spiral conveyor shaft 5. The other end of the delivery pipe 3 serves as the discharge port of the bottom output component.

[0032] Preferably, the driving motor 4 can be a unidirectional rotation motor in the prior art, and the motor specifications can be adaptively selected according to the actual sand and gravel conveying requirements. The spiral installation direction of the spiral conveyor shaft 5 should match the rotation direction of the unidirectional rotation motor, so as to ensure that the conveying direction of the sand and gravel is from one end of the delivery pipe 3 to the other end. The spiral conveyor shaft 5 is a commonly used material output structure in the art, and its working process and working principle will not be elaborated here.

[0033] Please refer to the appendix Figure 4 , an opening 6 is formed in the upper part of the delivery pipe 3. The opening 6 serves as the feed port of the bottom output component and is arranged facing the lower end of the screening mesh 2.

[0034] Through the setting of the opening 6, it is convenient for the screened sand and gravel to enter the delivery pipe 3 through the opening 6, so as to output the screened sand and gravel through the spiral conveyor shaft 5. The width of the opening 6 should be slightly larger than the particle size of the sand and gravel that slides down after screening, so as to ensure that the sand and gravel can smoothly enter the delivery pipe 3 and does not affect the conveying of the sand and gravel by the spiral conveyor shaft 5, and avoid the sand and gravel splashing out from the opening 6 during the conveying process.

[0035] The opening 6 is arranged along the length direction of the delivery pipe 3, and the length of the opening 6 is not less than the width of the screening mesh 2.

[0036] The length of the opening 6 should cover the lower end of the screening mesh 2, so as to ensure that all the sliding sand and gravel can smoothly enter the delivery pipe 3 through the opening.

[0037] Please refer to the appendix Figure 1 to appendix Figure 5 , on one side of each support frame 8 close to the connecting rod 12, a number of fixed shafts 9 are formed at intervals. On one side of the connecting rod 12 close to the support frame 8, a number of clamping slots 13 are formed at intervals. The diameter of the fixed shaft 9 is slightly smaller than the width of the clamping slot 13, so that one of the fixed shafts 9 can be clamped in one of the clamping slots 13, and the other end of the connecting rod 12 is detachably connected to the other end of the support frame 8.

[0038] Through the clamping connection between the fixed shaft 9 and the clamping slot 13, the other end of the connecting rod 12 can be detachably connected to the other end of the support frame 8. The connection method is fast, simple, and reliable. The number and arrangement spacing of the fixed shaft 9 and the clamping slot 13 can be adaptively adjusted according to the actual connection requirements, so as to facilitate the adjustment of the inclination angle of the screening mesh 2.

[0039] Please refer to the attached Figure 5 , the card slot 13 is in an inverted U-shaped structure and penetrates downward through the connecting rod 12, so that the connecting rod 12 is placed on one of the fixed shafts 9 of the support frame 8.

[0040] The connecting rod 12 is placed on one of the fixed shafts 9 of the support frame 8 from top to bottom through one of the card slots 13. The gravity of the connecting rod 12 is used to ensure the reliable connection of the card slot 13 on the fixed shaft 9 and prevent it from coming out during use.

[0041] Please refer to the attached Figure 1 to the attached Figure 3 , a limiting block 10 is formed at one end of the fixed shaft 9 away from the support frame 8. The diameter of the limiting block 10 is slightly larger than the width of the card slot 13, and the axial length of the fixed shaft 9 is slightly larger than the thickness of the connecting rod 12, so that the connecting rod 12 is clamped between the support frame 8 and the limiting block 10.

[0042] Through the setting of the limiting block 10, it plays a role of lateral limitation, which can prevent the connecting rod 12 from detaching from the support frame 8 and further ensure the stable and reliable structure of the triangular support.

[0043] Please refer to the attached Figure 1 to the attached Figure 5 , the usage method and working principle of the present utility model are as follows:

[0044] According to the screening angle usage requirements of the screening mesh 2, a pair of support frames 8 are respectively rotated and unfolded around a pair of first connecting shafts 7, a pair of connecting rods 12 are respectively rotated and unfolded around a pair of second connecting shafts 11, and a pair of connecting rods 12 are respectively placed on the fixed shafts 9 of a pair of support frames 8 through the card slots 13 at corresponding positions. The limiting block 10 ensures the lap stability between the connecting rod 12 and the support frame 8.

[0045] The screening frame 1, a pair of support frames 8 and a pair of connecting rods 12 are erected to form a triangular support structure. The screening mesh 2 is placed at the required screening angle, and the structure is stable and the support is reliable. The sand and gravel to be screened are poured onto the screening mesh 2, and the sand and gravel are screened by the screening mesh 2. The sand and gravel smaller than the mesh holes of the screening mesh 2 fall to the ground inside the triangular support structure, and the sand and gravel larger than the mesh holes of the screening mesh 2 slide to the low end of the screening mesh 2.

[0046] Start the drive motor 4, the drive motor 4 drives the spiral conveyor shaft 5 to rotate. The sliding sand and gravel enter the conveying pipe 3 through the opening 6, are spirally transmitted by the spiral conveyor shaft 5, and are output from the discharge port at the other end of the conveying pipe 3. A collection box can be set at the discharge port to facilitate the collection of the output sand and gravel, thus completing the screening of the sand and gravel.

[0047] When the entire device needs to be stored, carried, and transported, it is folded by rotating a pair of support frames 8 around a pair of first connecting shafts 7 respectively, rotating a pair of connecting rods 12 around a pair of second connecting shafts 11 respectively, and folding and storing the screening frame 1, a pair of support frames 8, and a pair of connecting rods 12 into a substantially planar shape, greatly reducing the occupied space.

[0048] The above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A foldable sand screening device, characterized in that: It includes a screening frame (1), a screening mesh (2), a bottom output component, a first connecting shaft (7), a support frame (8), a second connecting shaft (11), and a connecting rod (12); the screening frame (1) is of a frame structure, and the screening mesh (2) is detachably installed in the screening frame (1); both sides of one end of the screening frame (1) are rotatably connected to one end of a pair of support frames (8) through the first connecting shaft (7) respectively, and both sides of the other end of the screening frame (1) are rotatably connected to one end of a pair of connecting rods (12) through the second connecting shaft (11) respectively. The other ends of the pair of support frames (8) are detachably connected to the other ends of the pair of connecting rods (12) respectively. The screening frame (1), the pair of support frames (8), and the pair of connecting rods (12) form a triangular support structure, making the screening mesh (2) inclined; the bottom output component is installed at the lower end of the screening frame (1), and the feed inlet of the bottom output component faces the lower end of the screening mesh (2).

2. The foldable sand screening device according to claim 1, wherein: The bottom output component described above includes a conveying pipe (3), a driving motor (4), and a spiral conveying shaft (5); the conveying pipe (3) is a hollow tubular structure with openings at both ends, the spiral conveying shaft (5) is coaxially arranged inside the conveying pipe (3), the driving motor (4) is installed at the opening at one end of the conveying pipe (3), and the output shaft of the driving motor (4) is coaxially fixed to one end of the spiral conveying shaft (5). The other end of the conveying pipe (3) serves as the discharge port of the bottom output component.

3. The foldable sand screening device according to claim 2, characterized in that: An opening (6) is formed in the upper part of the conveying pipe (3), and the opening (6) serves as the feed inlet of the bottom output component and faces the lower end of the screening mesh (2).

4. The foldable sand screening device according to claim 3, characterized in that: The opening (6) is arranged along the length direction of the conveying pipe (3), and the length of the opening (6) is not less than the width of the screening mesh (2).

5. The foldable sand screening device according to claim 1, characterized in that: A number of fixed shafts (9) are formed at intervals on one side of each support frame (8) close to the connecting rod (12), and a number of card slots (13) are formed at intervals on one side of the connecting rod (12) close to the support frame (8). The diameter of the fixed shaft (9) is smaller than the width of the card slot (13), so that one of the fixed shafts (9) can be clamped in one of the card slots (13), making the other end of the connecting rod (12) detachably connected to the other end of the support frame (8).

6. The foldable sand screening device according to claim 5, wherein: The card slot (13) is of an inverted U-shaped structure and penetrates through the connecting rod (12) downward, so that the connecting rod (12) is placed on one of the fixed shafts (9) of the support frame (8).

7. The collapsible sand screening device according to claim 5 or 6, characterized in that: A limiting block (10) is formed at the end of the fixed shaft (9) away from the support frame (8). The diameter of the limiting block (10) is larger than the width of the card slot (13), and the axial length of the fixed shaft (9) is greater than the thickness of the connecting rod (12), so that the connecting rod (12) is clamped between the support frame (8) and the limiting block (10).

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