Gravel screening device for municipal engineering road and bridge construction
By designing components such as the sieve plate and the push tube, the problem of small-sized sand and gravel being blocked in the sand and gravel screening device was solved, thus achieving accurate screening of sand and gravel and stable operation of the equipment.
Patent Information
- Application Number
- CN202520141990.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-01-22
AI Technical Summary
When screening large quantities of sand and gravel, existing sand and gravel screening devices often result in smaller particles being blocked by larger particles, leading to poor screening results and errors in particle size distribution.
The design incorporates components such as a screen plate, motor, drive wheel, driven wheel, chain, push plate, and push tube. The push plate moves the sand and gravel in batches to different screening areas, and the push tube and eccentric wheel work together to ensure that the sand and gravel can pass through the screen holes smoothly and prevent clogging.
This effectively avoids screening errors caused by stacking of sand and gravel during the screening process, ensuring the accuracy of sand and gravel classification by particle size and the continuous operation of the equipment.
Smart Images
Figure CN223788955U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of municipal engineering, and in particular to a sand and gravel screening device for municipal engineering road and bridge construction. Background Technology
[0002] In road and bridge construction, a certain thickness of pavement structure is required to ensure the safety of roads and bridges and the stability of the foundation. Sand and gravel, as the main filler material for road base and pavement, can effectively increase pavement thickness and improve the overall stability and load-bearing capacity of the pavement.
[0003] In road and bridge construction, sand and gravel of different particle sizes need to be mixed in a certain proportion to ensure the strength and stability of concrete. Therefore, sand and gravel can be screened and classified according to a certain size range to obtain sand and gravel of different particle sizes. This allows for the selection of appropriate particle size ratios based on specific project requirements, thereby optimizing the performance of concrete.
[0004] Currently, most existing sand and gravel screening and sorting devices use the vibration of a screen plate to allow smaller-diameter sand and gravel to pass through, thus classifying sand and gravel of different particle sizes. However, in actual use, road and bridge construction often requires a large amount of sand and gravel. When the amount of sand and gravel being screened at the same time is large, some smaller-sized sand and gravel may be above larger-sized sand and gravel and fail to be screened out during the screening process. This can lead to errors in the final particle size distribution. Therefore, a sand and gravel screening device for municipal engineering road and bridge construction is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a sand and gravel screening device for municipal engineering road and bridge construction, which aims to improve the problem in the prior art where smaller sand and gravel particles are blocked by larger sand and gravel particles, affecting the screening effect.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a sand and gravel screening device for municipal engineering road and bridge construction, comprising a frame, a storage bin at the top of the frame, a screening mechanism inside the frame, the screening mechanism comprising a sieve plate, the outer wall of the sieve plate being fixedly connected to the inner wall of the frame, a motor being fixedly connected to the outer wall of the frame, the output shaft of the motor passing through the inner wall of the frame and being fixedly connected to a drive wheel, a driven wheel being rotatably connected to the inner wall of the frame, a chain being drively connected to the outer wall of the drive wheel and the outer wall of the driven wheel, a push plate being fixedly connected to the outer wall of the chain, a feeding assembly being provided inside the frame below the sieve plate, a bracket being fixedly connected to the bottom of the frame, a collection frame being placed on the upper surface of the bracket on the lower side of the front end of the frame, and a scraping brush being fixedly connected to the inner wall of the frame.
[0007] As a further description of the above technical solution:
[0008] The feeding assembly includes a movable plate, the outer wall of which is slidably connected to the inner wall of the frame, a push tube fixedly connected to the top of the movable plate, a rotating rod rotatably connected to the inner wall of the frame, an eccentric wheel fixedly connected to the outer wall of the rotating rod, and an inclined plate fixedly connected to the inner wall of the frame below the eccentric wheel.
[0009] As a further description of the above technical solution:
[0010] The inner wall of the sieve plate is provided with sieve holes, and the sieve holes are divided into multiple regions from left to right. The sieve holes in each region are of the same size, and the inner diameter of the sieve holes in different regions decreases from left to right. Furthermore, the sieve holes in different columns within each region are not at the same horizontal position.
[0011] As a further description of the above technical solution:
[0012] The bottom of the sieve plate is provided with a partition on the outer wall between the sieve holes in different areas, and the partition is located in the middle of the front-to-back direction of the sieve plate. There is a gap between the front surface of the partition and the front surface of the sieve plate with a width smaller than the minimum sieve hole diameter, and there is a gap between the rear surface of the partition and the rear surface of the sieve plate with a width smaller than the minimum sieve hole diameter.
[0013] As a further description of the above technical solution:
[0014] The push tube is a hollow tube, and the upper end of the push tube is inclined, with the right end of the push tube being higher than the left end.
[0015] As a further description of the above technical solution:
[0016] The frame is equipped with a filter plate in the area below the storage hopper, and a storage drawer that slides against the inner wall of the frame is located below the filter plate.
[0017] As a further description of the above technical solution:
[0018] The driving wheel is configured as two, and the two driving wheels are fixedly connected by a rotating shaft. The rotating shaft connecting the two driving wheels is connected to the rotating rod by a conveyor belt.
[0019] As a further description of the above technical solution:
[0020] The screen plate is fixedly connected to the lower end outside the push tube with an anti-deviation tube. The anti-deviation tube is cylindrical in shape, and its inner diameter matches the outer diameter of the push tube.
[0021] This utility model has the following beneficial effects:
[0022] 1. In this utility model, the arrangement of screen plate, motor, drive wheel, driven wheel, chain and push plate enables sand and gravel to move in batches to different screening areas of screen plate under the drive of push plate. This ensures that sand and gravel can pass through screen plate with different holes in sequence with less stacking. It also ensures that sand and gravel are not easily blocked by other sand and gravel and thus does not accidentally enter the larger sand and gravel area, thus ensuring the screening effect of sand and gravel.
[0023] 2. In this utility model, by setting up a moving plate, a pushing pipe, a rotating rod, an eccentric wheel, and an inclined plate, the pushing pipe can move up and down during the use of the equipment, so that the sand and gravel stuck in the screen holes of the screen plate are pushed out by the pushing pipe. At the same time, the sand and gravel that can pass through the pushing pipe can pass through the inside of the pushing pipe normally and be screened. Moreover, because the pushing pipe vibrates from moving up and down, the sand and gravel itself is not easy to get stuck inside the pushing pipe, thus achieving the effect of preventing sand and gravel blockage and affecting screening. Attached Figure Description
[0024] Figure 1 This is a three-dimensional structural diagram of the overall structure of this utility model;
[0025] Figure 2 This is a three-dimensional front sectional view of the overall structure of this utility model;
[0026] Figure 3 In this utility model Figure 2 Enlarged schematic diagram of the three-dimensional structure of part A in the middle;
[0027] Figure 4 This is a three-dimensional side sectional view of the overall structure of this utility model;
[0028] Figure 5 In this utility model Figure 4 Enlarged schematic diagram of the three-dimensional structure of part B;
[0029] Figure 6 This is a three-dimensional structural diagram of the moving plate and the pushing tube in this utility model.
[0030] Legend:
[0031] 1. Frame; 2. Storage bin; 3. Screening mechanism; 31. Screen plate; 32. Motor; 33. Drive wheel; 34. Driven wheel; 35. Chain; 36. Push plate; 37. Feeding assembly; 371. Moving plate; 372. Push tube; 373. Rotating rod; 374. Eccentric wheel; 375. Inclined plate; 376. Anti-deviation tube; 4. Support; 5. Collection frame. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] Reference Figure 1 and Figure 2 An embodiment of this utility model provides a sand and gravel screening device for municipal engineering road and bridge construction, including a frame 1, a storage bin 2 at the top of the frame 1, a discharge pipe at the bottom of the storage bin 2, and a valve inside the discharge pipe for controlling the falling speed of sand and gravel inside the storage bin 2. A filter plate is provided in the area below the storage bin 2 in the frame 1, and a storage drawer that slides against the inner wall of the frame 1 is provided below the filter plate.
[0034] Reference Figure 2 , Figure 3 and Figure 5 The frame 1 is equipped with a screening mechanism 3, which includes a screen plate 31. The inner wall of the screen plate 31 is provided with screen holes, which are divided into multiple areas from left to right. The screen holes in each area are of the same size, and the inner diameter of the screen holes in different areas decreases from left to right. The screen holes in different rows in each area are not at the same horizontal position. By setting the screen holes and their size and position, it is ensured that sand and gravel in different horizontal ranges can pass through the screen holes after passing through the area where the screen holes with a diameter larger than their own, thus achieving the screening effect. The bottom of the screen plate 31 is provided with a partition on the outer wall between the screen holes in different areas. The partition is located in the middle of the front-back direction of the screen plate 31. There is a gap between the front surface of the partition and the front surface of the screen plate 31 with a width smaller than the minimum screen hole diameter. There is also a gap between the rear surface of the partition and the rear surface of the screen plate 31 with a width smaller than the minimum screen hole diameter. The outer wall of the screen plate 31 is fixedly connected to the inner wall of the frame 1. A motor 32 is fixedly connected to the outer wall of the frame 1.
[0035] Reference Figure 1 , Figure 2 and Figure 4The output shaft of the motor 32 passes through the inner wall of the frame 1 and is fixedly connected to a drive wheel 33. The drive wheel 33 is a sprocket, and there are two drive wheels 33. The two drive wheels 33 are fixedly connected by a rotating shaft. The inner wall of the frame 1 is rotatably connected to a driven wheel 34. The driven wheel 34 is a sprocket with the same shape and size as the drive wheel 33. There are also two driven wheels 34, but there is no connection between the two driven wheels 34. They are rotatably connected to the inner walls of different sides of the frame 1. The outer wall of the drive wheel 33 and the outer wall of the driven wheel 34 are connected by a chain 35. The chain 35 matches the outer walls of the drive wheel 33 and the driven wheel 34. The bottom end of the chain 35 is set above the sieve plate 31. The outer wall of the chain 35 is fixedly connected to a push plate 36. The push plate 36 is a cuboid with multiple cuboid grooves on the bottom. The bottom area of the push plate 36 can deform to a certain extent. The push plate 36 has shape memory and can automatically reset when no force is applied.
[0036] Reference Figure 3 , Figure 5 and Figure 6 Inside the frame 1, below the sieve plate 31, is a feeding assembly 37. The feeding assembly 37 includes a movable plate 371. The movable plate 371 has holes identical to those in the sieve plate 31, and grooves matching the shape of the bottom partition of the sieve plate 31 are formed between the holes in different areas of the sieve plate 31. The outer wall of the movable plate 371 is slidably connected to the inner wall of the frame 1. A push tube 372 is fixedly connected to the top of the movable plate 371. The shape and properties of the push plate 36 ensure that when the push plate 36 contacts the push tube 372, it can temporarily deform, thereby... It will not affect the normal movement of the push tube 372. When the push plate 36 is in the lower half of the chain 35, its lower surface is in contact with the upper surface of the screen plate 31. The push tube 372 is a hollow tube, and the upper end of the push tube 372 is inclined. The height of the right end of the push tube 372 is higher than that of the left end. The push tube 372 corresponds one-to-one with the screen holes opened on the screen plate 31. The outer diameter of each push tube 372 matches the inner diameter of the screen hole it matches. The inner diameter of the push tube 372 matches the diameter of the sand and gravel screened by the screen holes in different areas as marked on the equipment.
[0037] Reference Figure 3 - Figure 5A screen plate 31 is fixedly connected to an anti-deviation tube 376 at its lower end outside the push tube 372. The anti-deviation tube 376 is cylindrical, and its inner diameter matches the outer diameter of the push tube 372. The anti-deviation tube 376 ensures that sand and gravel can smoothly enter the interior of the push tube 372 without entering the area between the moving plate 371 and the screen plate 31. A rotating rod 373 is rotatably connected to the inner wall of the frame 1. An eccentric wheel 374 is fixedly connected to the outer wall of the rotating rod 373. The eccentric wheel 374 is cylindrical, but the rotating rod 373 is not at the center of the eccentric wheel 374. An inclined plate 375 is fixedly connected to the inner wall of the frame 1 below the eccentric wheel 374. The rear end of the inclined plate 375 is higher than the front end. The eccentric wheel 374 is located on the lower side of the inclined plate 375. The position of the eccentric wheel 374 ensures that the equipment can make good use of space.
[0038] Reference Figure 1 and Figure 2 A bracket 4 is fixedly connected to the bottom of the frame 1. A collection box 5 is placed on the upper surface of the bracket 4 on the lower front side of the frame 1. The collection box 5 is not connected to the bracket 4, but a partition is set between the two collection box 5 placement points of the bracket 4. By setting that there is no connection, it is ensured that the collection box 5 can be easily picked up and replaced. This ensures that when one collection box 5 has collected a lot, the staff can replace the collection box 5 without turning off the equipment, thus ensuring that the equipment can continue to operate without affecting the collection effect.
[0039] Working principle: When in use, the staff puts the sand and gravel that needs to be screened into the storage tank 2, so that the sand and gravel slowly fall after passing through the valve at the bottom of the storage tank 2. After the sand and gravel fall, they first fall into the area of the frame 1 where the filter plate is set.
[0040] At the same time, the motor 32 drives the drive wheel 33 to rotate, which in turn drives the chain 35 to move between the drive wheel 33 and the driven wheel 34, thereby causing the chain 35 to move the push plate 36 during the movement.
[0041] As the pusher plate 36 moves, it causes the sand and gravel above the filter plate to move from right to left.
[0042] Since the falling speed of sand and gravel is controllable and the height of push plate 36 is limited, push plate 36 can only push sand and gravel below it. Therefore, by pushing sand and gravel with push plate 36, it can ensure that there is less stacking between sand and gravel.
[0043] As the sand and gravel move with the pusher plate 36, when the sand and gravel move to a position on the screen plate 31 where the holes are larger than other holes, the sand and gravel pass through the holes.
[0044] If the diameter of the sand is exactly smaller than the inner diameter of the matching push tube 372, the sand moves downward along the inner wall of the push tube 372, and after moving to the top of the inclined plate 375 below the push tube 372, it enters the interior of the corresponding collection frame 5 under the action of the inclined plate.
[0045] If the diameter of the sand is smaller than the hole in the sieve plate 31 but larger than the inner diameter of the push tube 372, or if the diameter of the sand is larger than the hole in the sieve plate 31 but some of it is stuck in the hole, then the sand will be pushed by the upper surface of the push tube 372 as the push tube 372 moves up and down, generating an upward and leftward force, which allows the sand to break free from the hole and continue to move to the left after being pushed on its right side.
[0046] When the motor 32 drives the drive wheel 33 to rotate, the shaft connecting the two drive wheels 33 rotates accordingly. Therefore, the shaft can cause the rotating rod 373 to rotate under the drive of the conveyor belt. Thus, the eccentric wheel 374 can rotate. When the eccentric wheel 374 is on the side farther from the rotating rod 373 and is above, it pushes the moving plate 371 to move upward. When the eccentric wheel 374 rotates to the side farther from the rotating rod 373 and is below, the moving plate 371 moves downward under the action of gravity. This allows the moving plate 371 to drive the push tube 372 to move up and down during the equipment startup process, ensuring that it can push the sand and gravel stuck in the holes of the screen plate 31. Since the upper end of the push tube 372 is set as an inclined surface and the inclined position is on the left, after the push tube 372 moves upward, it can push the sand and gravel stuck inside the screen plate 31 to the left, making it easier for the sand and gravel to move to the left to a larger position in the hole.
[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A sand and stone screening device for municipal engineering road and bridge construction, comprising a frame (1), characterized in that: The top of the frame (1) is provided with a storage barrel (2), the inside of the frame (1) is provided with a screening mechanism (3), the screening mechanism (3) comprises a sieve plate (31), the outer wall of the sieve plate (31) is fixedly connected with the inner wall of the frame (1), the outer wall of the frame (1) is fixedly connected with a motor (32), the output shaft of the motor (32) penetrates the inner wall of the frame (1) and is fixedly connected with a driving wheel (33), the inner wall of the frame (1) is rotatably connected with a driven wheel (34), the outer wall of the driving wheel (33) is drivingly connected with the outer wall of the driven wheel (34) through a chain (35), the outer wall of the chain (35) is fixedly connected with a push plate (36), the inside of the frame (1) below the sieve plate (31) is provided with a discharging assembly (37), the bottom of the frame (1) is fixedly connected with a support (4), and the upper surface of the support (4) below the front end of the frame (1) is placed with a collecting frame (5).
2. The sand and stone screening device for municipal engineering and bridge construction according to claim 1, characterized in that: The discharging assembly (37) comprises a moving plate (371), the outer wall of the moving plate (371) is slidingly connected with the inner wall of the frame (1), the top of the moving plate (371) is fixedly connected with a push pipe (372), the inner wall of the frame (1) is rotatably connected with a rotating rod (373), the outer wall of the rotating rod (373) is fixedly connected with an eccentric wheel (374), and the inner wall of the frame (1) below the eccentric wheel (374) is fixedly connected with an inclined plate (375).
3. The sand and stone screening device for municipal engineering and bridge construction of claim 1, characterized in that: The inner wall of the sieve plate (31) is provided with sieve holes, and the sieve holes are divided into a plurality of regions from left to right, the sieve holes in each region are consistent in size, the inner diameters of the sieve holes in different regions decrease from left to right in turn, and different columns of sieve holes in each region are not at the same horizontal position.
4. The sand and stone screening device for municipal engineering and bridge construction of claim 1, characterized in that: The outer wall of the sieve plate (31) between the sieve holes in different regions at the bottom is provided with a partition plate, and the partition plate is arranged at the middle of the sieve plate (31) in the front-rear direction, there is a gap between the front surface of the partition plate and the front surface of the sieve plate (31), the width of the gap is less than the diameter of the smallest sieve hole, and there is a gap between the rear surface of the partition plate and the rear surface of the sieve plate (31), the width of the gap is less than the diameter of the smallest sieve hole.
5. The sand and stone screening device for municipal engineering and bridge construction of claim 2, characterized in that: The push pipe (372) is a hollow tubular object, and the upper end of the push pipe (372) is inclinedly arranged, and the height of the right end of the push pipe (372) is higher than that of the left end.
6. The sand and stone screening device for municipal engineering and bridge construction of claim 2, characterized in that: The frame (1) is provided with a filter plate in the area below the storage barrel (2), and a storage drawer slidingly arranged with the inner wall of the frame (1) is arranged below the filter plate.
7. The sand and stone screening device for municipal engineering and bridge construction of claim 2, characterized in that: The driving wheel (33) is provided with two, and the two driving wheels (33) are fixedly connected through a rotating shaft, and the rotating shaft for connecting the two driving wheels (33) is drivingly connected with the rotating rod (373) through a conveyor belt.
8. The sand and stone screening device for municipal engineering and bridge construction of claim 2, characterized in that: The lower end of the sieve plate (31) outside the push pipe (372) is fixedly connected with an anti-deviation pipe (376), the shape of the anti-deviation pipe (376) is a circular pipe, and the inner diameter of the anti-deviation pipe (376) is matched with the outer diameter of the push pipe (372).