Novel sand screening machine for water conservancy project

Abstract

The utility model relates to the technical field of sand screening, in particular to a novel hydraulic engineering sand screening machine which comprises an installation frame and a feeding hopper, a fixing frame is installed at the top end of the installation frame, a plurality of supporting rods are installed in the middle of the top end of the fixing frame, and sliding groove plates and two fixing rods are installed on the two sides of the feeding hopper respectively. And the feeding hopper is slidably connected to the multiple supporting rods through the two sliding groove plates, a rotating frame is installed at the top end of the fixing frame, and the screening barrel is rotatably connected to the rotating frame. According to the sand screening device, large-particle impurities in sand can be effectively prevented from being accumulated and blocked in the feeding hopper by utilizing a double-layer shaking structure formed by the feeding hopper and the shaking frame in the discharging process, so that the sand screening efficiency is effectively improved, and the sand can be effectively screened when the screened sand is transported through the conveying belt. The sand is prevented from scattering in the conveying process through the three rubber rollers which are integrally in a concave shape on the support, and waste of materials is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of sand screening technology, and in particular to a new type of sand screening machine for water conservancy projects. Background Technology

[0002] Water conservancy projects are a collective term for projects (including new construction, expansion, reconstruction, reinforcement, and repair) and their supporting and ancillary projects, such as flood control, drainage, irrigation, power generation, water supply, reclamation, soil and water conservation, resettlement, and water resource protection. They are projects built to control and regulate surface water and groundwater in nature to achieve the purpose of eliminating harm and promoting benefits. They are also called water engineering projects. In the construction process of water conservancy projects, a large number of canals, dikes, etc. need to be built, and a large amount of sand is needed, thus requiring the use of sand screening machines.

[0003] Most existing sand screening machines, when processing sand to be screened, are prone to clogging due to the presence of large impurities (such as stones, branches, mud lumps, etc.) in the feed hopper. This leads to poor material flow or even complete blockage, reducing screening efficiency. Furthermore, since most existing sand screening machines have a straight conveyor belt structure and lack necessary lateral protection, sand easily spills from both sides of the conveyor belt during transport. This not only wastes materials but also increases cleaning costs and equipment maintenance difficulty, resulting in poor practicality. Utility Model Content

[0004] The purpose of this invention is to solve the problem that most existing sand screening machines have low screening efficiency and are prone to material waste when processing sand containing large-sized impurities and transporting the screened sand. Therefore, a new type of sand screening machine for water conservancy projects is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A novel sand screening machine for water conservancy projects includes a mounting frame and a feed hopper. A fixed frame is mounted on the top of the mounting frame, and multiple support rods are mounted at the middle of the top of the fixed frame. Sliding plates and two fixed rods are mounted on both sides of the feed hopper, and the feed hopper is slidably connected to the multiple support rods via the two sliding plates. The machine also includes:

[0007] The screen cylinder and the shaking frame are provided. A rotating frame is installed on the top of the fixed frame. The screen cylinder is rotatably connected to the rotating frame. A first driving part for driving the screen cylinder to rotate is provided on the fixed frame. An installation mechanism is provided on the four fixed rods, and a shaking frame is installed through the installation mechanism. The shaking frame is located directly below the feed hopper, and an opening is provided at one end facing the screen cylinder.

[0008] The system includes a force-applying mechanism and an anti-spillage mechanism. The force-applying mechanism is mounted on a fixed frame and a shaking frame to make the shaking frame shake back and forth. Both ends of the fixed frame are rotatably connected to transmission rollers, and a rotating part is provided on the fixed frame to drive the transmission rollers to rotate. A conveyor belt is mounted on both transmission rollers. The conveyor belt is located below the screening cylinder and the shaking frame. The anti-spillage mechanism is mounted on the fixed frame to prevent sand on the conveyor belt from easily spilling from both sides.

[0009] Preferably, the outer wall of the screening cylinder is made of a screen mesh, the fixing frame and the screening cylinder are both inclined downwards towards the first driving part, and the fixing frame and the screening cylinder are inclined at the same angle, and the shaking frame is inclined downwards towards the screening cylinder.

[0010] Preferably, the mounting mechanism includes four connecting arms, which are respectively mounted on four fixed rods. Two of the connecting arms are rotatably connected to a connecting rod on opposite sides, and the other two connecting arms are rotatably connected to another connecting rod on opposite sides. The shaking frame is fixedly mounted on two connecting rods.

[0011] Preferably, the force-applying mechanism includes a second drive unit and a transmission rod. The transmission rod is installed at the end of the shaking frame away from the screen cylinder, and a swing block is rotatably connected to the end away from the shaking frame. The second drive unit is installed on a fixed frame, and the swing block is installed on the second drive unit. The second drive unit is used to drive the swing block to swing back and forth.

[0012] Preferably, the anti-spillage mechanism includes multiple supports, which are evenly installed on a fixed frame and located within the conveyor belt. Three rubber rollers are rotatably connected to each support, and the outer walls of the three rubber rollers are in contact with the bottom surface of the upper portion of the conveyor belt. The opposite ends of the rubber rollers on both sides of the support are inclined downwards, and the height of the middle rubber roller on the support is the same as the height of the downward-facing ends of the rubber rollers on both sides.

[0013] Preferably, a plurality of supports are evenly installed at the bottom of the fixed frame, and an auxiliary roller is rotatably connected to the support. The outer wall of the auxiliary roller is in contact with the bottom surface of the lower part of the conveyor belt.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] 1. This utility model, through the cooperation of the feeding hopper, screening cylinder, shaking frame, installation mechanism, force application mechanism and anti-spillage mechanism, can not only effectively prevent large particles of impurities in the sand from accumulating and clogging in the feeding hopper during the material feeding process by utilizing the double-layer shaking structure formed by the feeding hopper and the shaking frame, thereby effectively improving the sand screening efficiency, but also prevent the sand from spilling during the transportation of the screened sand by utilizing the three concave rubber rollers on the support, thus effectively avoiding material waste.

[0016] 2. By incorporating a rubber roller in the anti-spillage mechanism, this utility model effectively absorbs vibrations that may occur during the operation of the conveyor belt when the screened sand falls onto it. Furthermore, the low coefficient of friction of rubber significantly improves the smoothness of the conveyor belt's operation, thus ensuring the efficiency and stability of material transport. Additionally, the auxiliary roller provides extra support points for the conveyor belt during operation, further enhancing its stability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall axonometric structure of a novel sand screening machine for water conservancy projects proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the swing block and transmission rod structure of a novel sand screening machine for water conservancy projects proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the rubber roller and support structure of a novel sand screening machine for water conservancy projects proposed in this utility model.

[0020] In the diagram: 1. Mounting frame, 2. Fixing frame, 3. Feed hopper, 4. Transmission roller, 5. Conveyor belt, 6. First drive unit, 7. Auxiliary roller, 8. Screening cylinder, 9. Second drive unit, 10. Swing block, 11. Transmission rod, 12. Shaking frame, 13. Connecting arm, 14. Fixing rod, 15. Rotating frame, 16. Support, 17. Rubber roller, 18. Slide plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1 to 3A novel sand screening machine for water conservancy projects includes a mounting frame 1 and a feeding hopper 3. A fixed frame 2 is installed at the top of the mounting frame 1, and multiple support rods are installed at the middle position of the top of the fixed frame 2. Sliding plates 18 and two fixed rods 14 are installed on both sides of the feeding hopper 3, and the feeding hopper 3 is slidably connected to the multiple support rods through the two sliding plates 18. The fixed rods 14 are located below the sliding plates 18. A rotating frame 15 is installed at the top of the fixed frame 2, and a screening cylinder 8 is rotatably connected through the rotating frame 15. The outer wall of the screening cylinder 8 is made of screen mesh. A first driving part 6 for driving the screening cylinder 8 to rotate is provided on the fixed frame 2. The first driving part 6 is prior art, and its specific structural design will not be described in detail here. Both the fixed frame 2 and the screening cylinder 8 are inclined downwards towards the first driving part 6, and the inclination angles of the fixed frame 2 and the screening cylinder 8 are the same.

[0023] Four fixed rods 14 are equipped with mounting mechanisms, and a shaking frame 12 is mounted on the mounting mechanisms. The shaking frame 12 is located directly below the feed hopper 3 and is inclined downwards towards the screen cylinder 8. The end of the shaking frame 12 facing the screen cylinder 8 has an opening. The fixed frame 2 and the shaking frame 12 are equipped with force-applying mechanisms to make the shaking frame 12 shake back and forth. The mounting mechanism includes four connecting arms 13, which are respectively mounted on the four fixed rods 14. Two connecting arms 13 are rotatably connected to a connecting rod on opposite sides, and the other two connecting arms 13 are rotatably connected to a connecting rod on opposite sides. The opposite side of the connecting arm 13 is rotatably connected to another connecting rod. The shaking frame 12 is fixedly installed on the two connecting rods. The force application mechanism includes a second drive unit 9 and a transmission rod 11. The transmission rod 11 is installed at the end of the shaking frame 12 away from the screen cylinder 8, and the end away from the shaking frame 12 is rotatably connected to the swing block 10. The second drive unit 9 is installed on the fixed frame 2, and the swing block 10 is installed on the second drive unit 9. The second drive unit 9 is used to drive the swing block 10 to swing back and forth. The second drive unit 9 is existing technology, and its specific structural design will not be described in detail here.

[0024] Both ends of the fixed frame 2 are rotatably connected to transmission rollers 4, and a rotating part is provided on it to drive the transmission rollers 4 to rotate. The rotating part is existing technology, and its specific structural design will not be described here. A conveyor belt 5 is sleeved on both transmission rollers 4. The conveyor belt 5 is located below the screen cylinder 8 and the shaking frame 12. The fixed frame 2 is provided with an anti-spillage mechanism to prevent sand on the conveyor belt 5 from easily spilling from both sides. The anti-spillage mechanism includes multiple supports 16, which are evenly installed on the fixed frame 2 and are all located inside the conveyor belt 5. Three rubber rollers 17 are rotatably connected to the supports 16. The outer walls of the three rubber rollers 17 are in contact with the bottom surface of the upper part of the conveyor belt 5. The opposite ends of the rubber rollers 17 on both sides of the supports 16 are inclined downwards, and the height of the middle rubber roller 17 on the supports 16 is the same as the height of the downward-facing ends of the rubber rollers 17 on both sides. Multiple supports are evenly installed at the bottom of the fixed frame 2. An auxiliary roller 7 is rotatably connected to the support. The outer wall of the auxiliary roller 7 is in contact with the bottom surface of the lower part of the conveyor belt 5.

[0025] In use, this invention first activates the first drive unit 6 and the rotating unit to start the screen cylinder 8 and the transmission roller 4 to rotate. The rotation of the transmission roller 4 drives the conveyor belt 5 to rotate. Then, the sand to be screened is poured into the feed hopper 3. Next, the second drive unit 9 is activated to drive the swing block 10 to swing, thereby driving the shaking frame 12 to perform high-frequency back-and-forth shaking under the action of the transmission rod 11. The shaking of the shaking frame 12 is transmitted to the fixed rod 14 through the connecting arm 13. Since the feed hopper 3 is fixedly connected to the fixed rod 14, and the side of the feed hopper 3... The sliding plate 18 on the surface is slidably connected to the support rod on the fixed frame 2. Therefore, the fixed rod 14 can drive the feed hopper 3 to shake back and forth. This double-layer shaking structure formed by the feed hopper 3 and the shaking frame 12 can make the feed hopper 3 use inertial force to quickly loosen the sand containing impurities in the high-frequency reciprocating motion, effectively preventing large particles of impurities from accumulating and clogging in the feed hopper 3. Moreover, the high-frequency vibration of the shaking frame 12 can throw the sand in it into the screening cylinder 8, thereby effectively improving the feeding efficiency and the sand screening efficiency.

[0026] When sand enters the rotating screen cylinder 8, it will be efficiently separated under the action of centrifugal force. Heavier impurities in the sand will be discharged from the downward opening of the screen cylinder 8 under the action of gravity, while sand particles that meet the requirements will fall onto the conveyor belt 5 below through the outer wall of the screen of the screen cylinder 8. Under the continuous operation of the conveyor belt 5, they will be transported upward, ultimately achieving effective separation of sand and impurities. When the sand particles that meet the requirements fall onto the conveyor belt 5, under the action of gravity, the bottom surface of the upper part of the conveyor belt 5 will contact the outer wall of the rubber roller 17. As the conveyor belt 5 runs, the rubber roller 17 rolls accordingly. Its rubber material not only effectively absorbs the vibration that may be generated during the operation of the conveyor belt 5, but also significantly improves the smoothness of the operation of the conveyor belt 5 due to the low coefficient of friction of rubber. This dual optimization design effectively ensures the efficiency and stability of material transportation.

[0027] Furthermore, since the opposite ends of the rubber rollers 17 on both sides of the support 16 are inclined downwards, and the height of the middle rubber roller 17 on the support 16 is the same as the height of the downward-facing ends of the rubber rollers 17 on both sides, the three rubber rollers 17 on the support 16 are concave in shape. This unique structural design can effectively prevent sand from spilling during the conveying process, thus avoiding material waste. In addition, during the operation of the conveyor belt 5, the auxiliary roller 7 that contacts the bottom surface of its lower part will also roll along with it, providing additional support points for the conveyor belt 5, thereby further enhancing the operational stability of the conveyor belt 5.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A novel water conservancy sand screening machine, comprising a mounting frame (1) and a feeding hopper (3), a fixing frame (2) is installed at the top end of the mounting frame (1), a plurality of supporting rods are installed at the top end of the fixing frame (2), chute plates (18) and two fixing rods (14) are installed on both sides of the feeding hopper (3), and the feeding hopper (3) is slidably connected to the plurality of supporting rods through the two chute plates (18), characterized in that, Also includes: The screen cylinder (8) and the shaking frame (12) are provided. A rotating frame (15) is installed on the top of the fixed frame (2). The screen cylinder (8) is rotatably connected to the rotating frame (15). A first driving part (6) for driving the screen cylinder (8) to rotate is provided on the fixed frame (2). An installation mechanism is provided on the four fixed rods (14), and the shaking frame (12) is installed through the installation mechanism. The force-applying mechanism and the anti-spillage mechanism are provided. The force-applying mechanism is set on the fixed frame (2) and the shaking frame (12) to make the shaking frame (12) shake back and forth. Both ends of the fixed frame (2) are rotatably connected to the transmission rollers (4), and a rotating part is provided on it to drive the transmission rollers (4) to rotate. The two transmission rollers (4) are fitted together with a conveyor belt (5). The conveyor belt (5) is located below the screen cylinder (8) and the shaking frame (12). The anti-spillage mechanism is set on the fixed frame (2) to prevent the sand on the conveyor belt (5) from easily spilling from both sides.

2. A novel sand screening machine for hydraulic engineering according to claim 1, characterized in that, The outer wall of the screening cylinder (8) is made of a screen. The fixing frame (2) and the screening cylinder (8) are both inclined downwards towards the first driving part (6), and the fixing frame (2) and the screening cylinder (8) have the same inclination angle. The shaking frame (12) is located directly below the feed hopper (3) and is inclined downwards towards the screening cylinder (8). The shaking frame (12) has an opening at one end facing the screening cylinder (8).

3. A novel sand screening machine for hydraulic engineering according to claim 2, characterized in that, The installation mechanism includes four connecting arms (13), which are respectively mounted on four fixed rods (14). Two of the connecting arms (13) are rotatably connected to a connecting rod on opposite sides, and the other two connecting arms (13) are rotatably connected to another connecting rod on opposite sides. The shaking frame (12) is fixedly mounted on two connecting rods.

4. A new type of sand screening machine for hydraulic engineering according to claim 3, characterized in that, The force-applying mechanism includes a second drive unit (9) and a transmission rod (11). The transmission rod (11) is installed at one end of the shaking frame (12) away from the screen cylinder (8), and a swing block (10) is rotatably connected to the end of the shaking frame (12). The second drive unit (9) is installed on the fixed frame (2), and the swing block (10) is installed on the second drive unit (9). The second drive unit (9) is used to drive the swing block (10) to swing back and forth.

5. The new sand screening machine for hydraulic engineering according to claim 1, characterized in that, The anti-spillage mechanism includes multiple brackets (16), which are evenly installed on the fixed frame (2) and are all located inside the conveyor belt (5). Three rubber rollers (17) are rotatably connected to each bracket (16). The outer walls of the three rubber rollers (17) are in contact with the bottom surface of the upper part of the conveyor belt (5). The opposite ends of the rubber rollers (17) on both sides of the bracket (16) are inclined downwards, and the height of the middle rubber roller (17) on the bracket (16) is the same as the height of the downward-facing ends of the rubber rollers (17) on both sides.

6. A new type of sand screening machine for hydraulic engineering according to claim 5, characterized in that, The bottom end of the fixed frame (2) is evenly equipped with multiple supports, and an auxiliary roller (7) is rotatably connected to the support. The outer wall of the auxiliary roller (7) is in contact with the bottom surface of the lower part of the conveyor belt (5).

Images