A sand and gravel screen

Abstract

The utility model discloses a sandstone screen, including installation shell, the both ends symmetry of installation shell outside wall are equipped with support frame, installation shell bottom left side is equipped with first discharge hopper, and right side is equipped with second discharge hopper, installation shell right side outer wall is fixed with the bottom plate, and the upper surface of bottom plate is equipped with the drive motor, installation shell upper end edge department, left side is fixed with first mounting panel, and right side is fixed with second mounting panel, the output of drive motor is connected with connecting rod coaxial through the shaft coupling, and connecting rod penetrates second mounting panel and is fixedly connected with fixed block, the utility model discloses, through detachable assembly installation screen, and the sandstone particle size requirement of different construction scene can be through the screen of staff, and when the screen appears damage, make detachable assembly quick disassembly old screen and replace the screen of available use, and the operation is simple and convenient, need not complex tool, reduced the maintenance workload of staff.

Description

Technical Field

[0001] This utility model relates to the technical field of sand and gravel screening equipment, and in particular to a sand and gravel screen. Background Technology

[0002] In the field of construction engineering, sand screening machines are the core equipment in the pretreatment of sand and gravel raw materials. Their screening efficiency and flexibility directly affect the construction quality and progress of subsequent processes such as concrete preparation and roadbed paving.

[0003] Chinese Patent CN223145238U discloses a sand screening machine for construction engineering, including a base with a frame fixedly connected to the top of the base and a positioning plate fixedly connected to one side of the frame. By setting a cleaning mechanism, the outer surface of the drum screen can be struck, causing the sand and gravel clogging the drum screen apertures to fall off automatically, improving sand and gravel screening efficiency. The automatic cleaning of the drum screen reduces maintenance efficiency for workers. By setting a conveying mechanism, when the drum screen screens sand and gravel, small sand and gravel particles fall through the apertures on the drum screen surface onto the conveyor belt, which then transports them, improving worker efficiency. This solves the problem of existing sand screening machines where the screen is easily squeezed and clogged, requiring manual cleaning and manual conveying of the screened sand and gravel after discharge, thus increasing the workload of workers.

[0004] However, the sand screening machine mentioned above for construction projects has an integrated drum screen structure. Faced with the diverse sand and gravel screening needs in construction projects, the screen mesh diameter of the integrated drum screen is fixed and cannot be quickly adjusted according to the particle size requirements of different construction scenarios. During long-term operation, the screen mesh is prone to local damage due to sand and gravel impact, impurity wear, or material blockage, which makes it easy to disassemble and reassemble. Therefore, a sand and gravel screen is proposed to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model To address the technical problems existing in the background art, this utility model proposes a sand and gravel screen that allows for quick disassembly of the old screening screen and replacement with a usable screen through a detachable component. The operation is simple and convenient, requires no complicated tools, and reduces the maintenance workload of the staff.

[0006] (II) Technical Solution This utility model provides a sand and gravel screen, including a mounting shell. Support frames are symmetrically installed at both ends of the outer side wall of the mounting shell. A first discharge hopper is provided on the left side of the bottom of the mounting shell, and a second discharge hopper is provided on the right side. A base plate is fixed to the right outer wall of the mounting shell, and a drive motor is installed on the upper surface of the base plate. At the upper edge of the mounting shell, a first mounting plate is fixed on the left side, and a second mounting plate is fixed on the right side. The output end of the drive motor is coaxially connected to the connecting rod via a coupling. The connecting rod passes through the second mounting plate and is fixedly connected to the fixing block. The fixing block is rotatably connected to the first mounting plate via the connecting rod. A screening mechanism is installed on the outer end face of the connecting rod. The screening mechanism consists of a fixing ring, a side plate, and a screen assembly. The fixing ring is located outside the fixing block and the two are coaxially arranged. The outer end face of the fixing block is fixedly connected to the inner wall of the fixing ring via a second reinforcing rod distributed in a ring array. Multiple side plates are arranged in a ring array and installed on the side of the fixing ring facing the first mounting plate. The side plates are reinforced and connected to the connecting rod by multiple first reinforcing rods. A screening screen is installed between two adjacent side plates by a detachable component.

[0007] Preferably, the screening mechanism, connecting rod, bottom plate and drive motor are all inclined, and the inclination direction and angle are consistent.

[0008] Preferably, the detachable component includes a chute plate and a sliding insert plate. The two sides of the screening mesh are fixedly connected to the sliding insert plate, and the two ends of the outer wall of the side plate are respectively welded with chute plates. The sliding insert plates on both sides of the screening mesh form a sliding fit with the chute plates on the corresponding sides.

[0009] Preferably, the detachable component further includes a reinforcing frame and fixing bolts. An installation ring is fixed on the side of the screening screen away from the fixing ring. Handles are symmetrically installed on the outer side of the installation ring. The two outer ends of the installation ring are respectively fixedly connected to the reinforcing frame. The fixing bolts pass through the reinforcing frame and the slide plate in sequence and are threadedly connected to the threaded holes on the side plate.

[0010] Preferably, the inner diameter of the screening screen, side plate, mounting ring and fixing ring are the same, and their centers are located on the same axis.

[0011] Preferably, protective plates are symmetrically installed on both sides of the upper edge of the mounting housing.

[0012] Preferably, the inner top walls of the first discharge hopper and the second discharge hopper are both designed with inclined smooth surfaces. The first discharge hopper is located to the left of the central axis at the lower end of the fixed ring, and the second discharge hopper is located to the right of the central axis at the lower end of the fixed ring.

[0013] Furthermore, the connecting rod passes through the second mounting plate via a bearing.

[0014] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects: This sand and gravel screen features a detachable assembly for installing the screening mesh. Workers can quickly remove the old screening mesh and replace it with a usable one when the old mesh is damaged, depending on the sand and gravel particle size requirements of different construction scenarios. The operation is simple and convenient, requiring no complicated tools and reducing the maintenance workload for workers. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a sand and gravel sieve proposed in this utility model.

[0016] Figure 2 This is a perspective view of a screening mechanism in a sand and gravel sieve proposed in this utility model.

[0017] Figure 3 This is a partial cross-sectional view of a screening mechanism in a sand and gravel screen proposed in this utility model.

[0018] Figure 4 This is an exploded view of a screen assembly in a sand and gravel sieve according to the present invention.

[0019] Reference numerals: 1. First mounting plate; 2. Mounting ring; 3. Handle; 4. Side plate; 5. Screening mesh; 6. Protective plate; 7. Connecting rod; 8. Second mounting plate; 9. Drive motor; 10. First discharge hopper; 11. Mounting housing; 12. Support frame; 13. Second discharge hopper; 14. Base plate; 15. Slide plate; 16. Fixing ring; 18. First reinforcing rod; 19. Reinforcing frame; 20. Second reinforcing rod; 21. Fixing block; 22. Threaded hole; 23. Fixing bolt; 24. Sliding insert plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, such as welding, riveting, or bonding; it can also be a detachable connection, such as threaded connection, keyed connection, or pin connection; or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1-4 As shown, the present invention proposes a sand and gravel screen, including a mounting shell 11. Support frames 12 are symmetrically installed at both ends of the outer side wall of the mounting shell 11. A first discharge hopper 10 is provided on the left side of the bottom of the mounting shell 11, and a second discharge hopper 13 is provided on the right side. A base plate 14 is fixed to the right outer wall of the mounting shell 11. The base plate 14 can provide a foundation for the installation of the drive motor 9. The drive motor 9 is installed on the upper surface of the base plate 14 to provide a power source for the operation of the equipment. At the upper edge of the mounting shell 11, a first mounting plate 1 is fixed on the left side, and a second mounting plate 8 is fixed on the right side. The output end of the drive motor 9 is coaxially connected to the connecting rod via a coupling. The connecting rod passes through the second mounting plate 8 and is fixedly connected to the fixing block 21. The fixing block 21 is rotatably connected to the first mounting plate 1 via the connecting rod. A screening mechanism is installed on the outer end face of the connecting rod. The screening mechanism consists of a fixing ring 16, a side plate 4, and a screen assembly. The fixing ring 16 is located outside the fixing block 21 and the two are coaxially arranged. The outer end face of the fixing block 21 is fixedly connected to the inner wall of the fixing ring 16 via a second reinforcing rod 20 distributed in a ring array. Multiple side plates 4 are arranged in a ring array and installed on the side of the fixing ring 16 facing the first mounting plate 1. The side plates 4 are reinforced and connected to the connecting rod by multiple first reinforcing rods 18. A screening screen 5 is installed between two adjacent side plates 4 by a detachable component.

[0024] Among them, the screening mesh 5 is made of low carbon steel or cold-rolled steel plate with a thickness of 4-5mm, which can prevent the possibility of deformation when the screening mesh 5 is naturally picked up and placed, and ensure the stability of the screening mesh 5 during disassembly and assembly.

[0025] In this embodiment, the screening mechanism, connecting rod, bottom plate 14 and drive motor 9 are all inclined, and the inclination direction and angle are the same. The inner diameter of the screening screen 5, side plate 4, mounting ring 2 and fixing ring 16 are the same, and their centers are located on the same axis.

[0026] It should be noted that when screening sand and gravel, gravity can be used to assist the sand and gravel in moving within the screening mechanism, thereby improving screening efficiency.

[0027] In this embodiment, the detachable component includes a chute plate 15 and a sliding insert plate 24. The two sides of the screening screen 5 are fixedly connected to the sliding insert plate 24 respectively. The two ends of the outer wall of the side plate 4 are welded with chute plates 15 respectively. The sliding insert plates 24 on both sides of the screening screen 5 form a sliding fit with the chute plates 15 on the corresponding side respectively. The detachable component also includes a reinforcing frame 19 and a fixing bolt 23. An installation ring 2 is fixed on the side of the screening screen 5 away from the fixing ring 16. Handles 3 are symmetrically installed on the outer side of the installation ring 2 to facilitate the operation of the operator. The two ends of the outer side of the installation ring 2 are fixedly connected to the reinforcing frame 19 respectively. The fixing bolt 23 passes through the reinforcing frame 19 and the chute plate 15 in sequence and is threadedly connected to the threaded hole 22 on the side plate 4 to achieve a firm fixation of the screening screen 5, and also facilitate subsequent disassembly and replacement.

[0028] It should be noted that, according to the actual screening requirements, a screening mesh 5 with a corresponding aperture is selected, and the two sides of the screening mesh 5 are welded and fixed to the sliding insert plate 24; then, the sliding insert plate 24 on one side of the screening mesh 5 is aligned with the sliding groove plate 15 on the two adjacent side plates 4, and the screening mesh 5 is pushed so that the sliding insert plate 24 slides along the sliding groove plate 15 until the screening mesh 5 is completely embedded between the adjacent side plates 4; next, the mounting ring 2 is welded on the side of the screening mesh 5 away from the fixing ring 16, two handles 3 are symmetrically welded on the outside of the mounting ring 2, and the reinforcing frame 19 is welded at both ends on the outside of the mounting ring 2; finally, the fixing bolt 23 is passed through the reinforcing frame 19 and the sliding groove plate 15 in sequence, and screwed into the threaded hole 22 on the side plate 4 until the fixing bolt 23 is tightened, so as to achieve a firm fixation of the screening mesh 5.

[0029] In this embodiment, protective plates 6 are symmetrically installed on both sides of the upper edge of the housing 11.

[0030] It should be noted that the protective plates 6 on both sides prevent sand and gravel from splashing from both sides of the equipment during the screening process, ensuring a clean working environment and the safety of workers. In this embodiment, the inner top walls of the first discharge hopper 10 and the second discharge hopper 13 are both designed with inclined smooth surfaces. The first discharge hopper 10 is located to the left of the central axis at the lower end of the fixing ring 16, and the second discharge hopper 13 is located to the right of the central axis at the lower end of the fixing ring 16.

[0031] It should be noted that the first discharge hopper 10 is located to the left of the central axis at the lower end of the fixed ring 16, and the second discharge hopper 13 is located to the right of the central axis at the lower end of the fixed ring 16, to ensure that sand and gravel of different particle sizes can fall accurately into the corresponding discharge hopper.

[0032] In this embodiment, the connecting rod passes through the second mounting plate 8 via a bearing.

[0033] It should be noted that the bearing connection can effectively isolate the rotational movement of the connecting rod from the fixed state of the second mounting plate 8, reduce the frictional resistance between the connecting rod and the second mounting plate 8 when the connecting rod rotates, and ensure the coaxiality and stability of the connecting rod rotation, thus ensuring the smoothness of the sand and gravel screening process.

[0034] Working principle When the power supply to the drive motor 9 is turned on, the drive motor 9 starts to work. Its output end drives the connecting rod to rotate around its own axis through the coupling. Since the connecting rod is fixedly connected to the fixed block 21, the fixed block 21 rotates synchronously with the connecting rod. Then, the second reinforcing rod 20 drives the fixed ring 16 to rotate. The fixed ring 16 then drives the side plate 4 and the screening screen 5 installed between the side plates 4 to rotate together. Then, the workers pour the sand and gravel to be screened into the screening mechanism through the feed port at the top of the mounting shell 11. Since the screening mechanism is set at an inclination, the sand and gravel slowly move along the inclination direction of the screening screen 5 under the action of gravity during the rotation of the screening mechanism. During this process, the sand and gravel with a particle size smaller than the aperture of the screening screen 5 will pass through the screening screen 5 and fall into the bottom of the mounting shell 11, and finally slide into the first discharge hopper 10 located on the left side of the central axis at the lower end of the fixed ring 16, thus completing the collection of fine-sized sand and gravel. The sand and gravel with a particle size larger than the aperture of the screening screen 5 cannot pass through the screening screen 5 and continue to move along the inclination direction of the screening screen 5, and finally slide out from the end of the screening mechanism and fall into the second discharge hopper 13 located on the right side of the central axis at the lower end of the fixed ring 16, thus completing the collection of coarse-sized sand and gravel and realizing the grading and screening of sand and gravel.

[0035] When the screening particle size needs to be adjusted according to construction requirements or when the screening screen 5 is damaged, first turn off the drive motor 9. After the screening mechanism has completely stopped rotating, the worker uses a tool to unscrew the fixing bolts 23 on the reinforcing frame 19. Then, hold the handle 3 on the mounting ring 2 and pull the mounting ring 2 away from the fixing ring 16, so that the sliding inserts 24 on both sides of the screening screen 5 slide along the slide plate 15 until the screening screen 5 is completely pulled out from between the adjacent side plates 4. Then, the usable screening screen 5 with the corresponding aperture is slidably embedded between the side plates 4 through the cooperation of the sliding inserts 24 and the slide plate 15. Then, the reinforcing frame 19, the slide plate 15 and the side plates 4 are fixed with the fixing bolts 23 to complete the replacement of the screening screen 5. After that, the equipment can be restarted for screening operations.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sand and gravel screen, comprising an installation shell (11), wherein support frames (12) are symmetrically installed at both ends of the outer side wall of the installation shell (11), a first discharge hopper (10) is provided on the left side of the bottom of the installation shell (11), and a second discharge hopper (13) is provided on the right side; a bottom plate (14) is fixed to the right outer wall of the installation shell (11), and a drive motor (9) is installed on the upper surface of the bottom plate (14); at the upper edge of the installation shell (11), a first mounting plate (1) is fixed on the left side, and a second mounting plate (8) is fixed on the right side. The output end of the drive motor (9) is coaxially connected to the connecting rod via a coupling. The connecting rod passes through the second mounting plate (8) and is fixedly connected to the fixing block (21). The fixing block (21) is rotatably connected to the first mounting plate (1) via the connecting rod. A screening mechanism is installed on the outer end face of the connecting rod. The characteristic feature is that: The screening mechanism consists of a fixed ring (16), a side plate (4), and a screen assembly; the fixed ring (16) is located outside the fixed block (21) and the two are coaxially arranged; the outer end face of the fixed block (21) is fixedly connected to the inner wall of the fixed ring (16) through a second reinforcing rod (20) distributed in a ring array; Multiple side plates (4) are arranged in a ring array and installed on the side of the fixing ring (16) facing the first mounting plate (1). The side plates (4) are reinforced and connected to the connecting rod by multiple first reinforcing rods (18). A screening screen (5) is installed between two adjacent side plates (4) through a detachable component.

2. The sand and gravel sieve according to claim 1, characterized in that, The screening mechanism, connecting rod (7), bottom plate (14) and drive motor (9) are all inclined, and the inclination direction and angle are consistent.

3. A sand and gravel sieve according to claim 1, characterized in that, The detachable component includes a chute plate (15) and a sliding insert plate (24). The two sides of the screening mesh (5) are fixedly connected to the sliding insert plate (24). The two ends of the outer wall of the side plate (4) are respectively welded with chute plates (15). The sliding insert plates (24) on both sides of the screening mesh (5) form a sliding fit with the chute plates (15) on the corresponding sides.

4. A sand and gravel sieve according to claim 3, characterized in that, The detachable assembly also includes a reinforcing frame (19) and a fixing bolt (23). The screening screen (5) is fixed with an installation ring (2) on the side away from the fixing ring (16). A handle (3) is symmetrically installed on the outside of the installation ring (2). The two ends of the outside of the installation ring (2) are fixedly connected to the reinforcing frame (19) respectively. The fixing bolt (23) passes through the reinforcing frame (19) and the slide plate (15) in sequence and is threadedly connected to the threaded hole (22) on the side plate (4).

5. A sand and gravel sieve according to claim 4, characterized in that, The inner diameter of the screening mesh (5), side plate (4), mounting ring (2) and fixing ring (16) is the same, and their centers are located on the same axis.

6. A sand and gravel sieve according to claim 1, characterized in that, Protective plates (6) are symmetrically installed on both sides of the upper edge of the mounting shell (11).

7. A sand and gravel sieve according to claim 1, characterized in that, The inner top walls of the first discharge hopper (10) and the second discharge hopper (13) are both designed with inclined smooth surfaces. The first discharge hopper (10) is located to the left of the central axis at the lower end of the fixed ring (16), and the second discharge hopper (13) is located to the right of the central axis at the lower end of the fixed ring (16).

8. A sand and gravel sieve according to claim 1, characterized in that, The connecting rod passes through the second mounting plate (8) via a bearing.

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