Anti-screen jamming device for asphalt mixing plant

Abstract

The utility model discloses a kind of anti-sieve mesh blocking devices of asphalt mixing plant, belong to asphalt processing technical field, including rack, multiple sieve structures that are stacked together on rack are provided, aggregate is sieved through sieve, while every sieve structure can be detachably connected with two rows of anti-blocking balls that can be alternately moved up and down to impact sieve, and every sieve structure can be detachably provided with driving mechanism that drives two rows of anti-blocking balls to be alternately moved up and down.The utility model drives two rows of anti-blocking balls alternately to impact sieve by driving mechanism, to prevent sieve from being blocked, not rely on the elasticity of anti-blocking ball to make anti-blocking ball jump up and down;While driving mechanism and anti-blocking ball are detachably arranged, convenient to replace it.

Description

Technical Field

[0001] This utility model belongs to the field of asphalt processing technology, specifically relating to an anti-screen clogging device for asphalt mixing plants. Background Technology

[0002] Asphalt mixing plants are the core equipment for producing asphalt mixtures in road engineering. They mainly include a cold material supply system, a drying and heating system, a screening system, a metering and mixing system, and a dust removal and environmental protection system.

[0003] The screening system mainly uses multi-layer vibrating screens (usually 3-5 layers) to classify hot aggregates by particle size. Traditional multi-layer vibrating screens use rubber elastic balls to prevent screen blockage. However, the aggregates entering the screening system are at high temperatures. The rubber elastic balls are exposed to high temperatures for a long time, which causes them to stick to the screen, preventing them from bouncing up and down. When the elasticity of the rubber elastic balls fails, the screen is easily blocked. At the same time, it is not convenient to replace the rubber elastic balls when they are damaged in traditional multi-layer vibrating screens. Utility Model Content

[0004] To address the problem of screen clogging caused by the loss of elasticity of rubber balls in traditional multi-layer vibrating screens, and the inconvenience of replacing damaged rubber balls, this invention provides an anti-screen clogging device for asphalt mixing plants. A drive mechanism rotates two rows of anti-clogging balls to alternately impact the screen, preventing clogging without relying on the elasticity of the anti-clogging balls to bounce up and down. Furthermore, both the drive mechanism and the anti-clogging balls are detachable for easy replacement.

[0005] The technical solution adopted by this utility model for an anti-screen clogging device for asphalt mixing plants is as follows:

[0006] A screen clogging prevention device for an asphalt mixing plant includes a frame on which multiple screening structures for screening aggregates are stacked together. Each screening structure is detachably connected to two rows of anti-clogging balls that can alternately move up and down to impact the screen. Each screening structure is also detachably equipped with a drive mechanism that drives the two rows of anti-clogging balls to move up and down alternately.

[0007] A further improvement of the present invention is that each of the screening structures includes a frame, a screen for screening aggregate is fixed at the top of the frame, an anti-blocking ball is located below the screen, and a driving structure is set on the inner wall of the frame; wherein, a vertical screening plate is fixed at the edge of the screen, and a screening opening is formed between the screening plate and the frame.

[0008] A further improvement of this utility model is that: each row of anti-blocking balls is evenly distributed along the length of the frame, and two anti-blocking balls located on the same longitudinal straight line are connected together by a connecting rod, and one end of each connecting rod is hinged to the drive mechanism.

[0009] A further improvement of this utility model is that: a rotating shaft is detachably connected to the frame at a position corresponding to its length axis, and each connecting rod passes through the rotating shaft.

[0010] A further improvement of the present invention is that: both ends of the rotating shaft are rotatably connected to a first slider, and the first slider is horizontally slidably disposed on the inner wall of the screening plate and the frame.

[0011] A further improvement of the present invention is that the driving mechanism includes a second slider that can move up and down on the inner wall of the frame, and the second slider is hinged to one end of the connecting rod.

[0012] A further improvement of this utility model is that: a second sliding groove adapted to the second slider is provided on the inner wall of the frame at the position corresponding to the second slider, and a vertical reciprocating screw is provided in the second sliding groove; wherein, the top end of the reciprocating screw extends upward and is flush with the top of the frame, and the bottom end of the reciprocating screw extends downward and is flush with the bottom of the frame.

[0013] A further improvement of the present invention is that: a through hole with a polygonal cross-section is provided in the reciprocating lead screw, and a polygonal rod that matches the through hole is inserted in the through hole.

[0014] A further improvement of this utility model is that the top of the polygonal rod extends upward to the top of the cover and is fixedly fitted with a passive wheel, and multiple passive wheels are connected together by a connecting wheel.

[0015] Due to the adoption of the above technical solution, the technical progress achieved by this utility model includes:

[0016] This invention utilizes multiple stacked screening structures to classify and screen aggregates. Compared to traditional multi-layer vibrating screens that rely on the elasticity of rubber balls to impact the screen, this invention uses a drive mechanism to drive two rows of anti-clogging balls to alternately impact the screen, thereby preventing screen blockage. As long as the drive mechanism is not damaged, the anti-clogging balls will not stop impacting, thus reducing the probability of screen blockage. In addition, both the drive mechanism and the anti-clogging balls in this invention are detachable for easy replacement.

[0017] In this invention, the polygonal rods connect all reciprocating lead screws located on the same vertical line. Simultaneously, by driving a driven wheel, all driven wheels rotate simultaneously in the same direction, thus driving all the polygonal rods and reciprocating lead screws to rotate in the same direction. When the reciprocating lead screws rotate, they cause the second slider to slide up and down within the corresponding second groove. Simultaneously, the sliding of the second slider causes the corresponding connecting rod to rotate around the axis, causing the two anti-blocking balls on the connecting rod to alternately move up and down, impacting the screen and preventing screen blockage.

[0018] In this invention, when the anti-clogging ball needs to be replaced, the bolts between the screen of the screening structure to be replaced and the front side wall of the frame are removed. At the same time, the bolts between the first slider and the right side wall of the frame, and between the front side wall of the frame and the left / right side wall of the frame are also removed. Then, the polygonal rod is pulled out of the through hole. At this time, pulling the front side wall of the frame outward can pull out the rotating shaft, connecting rod and anti-clogging ball from the frame, so that the anti-clogging ball can be replaced without disassembling the whole machine, thus facilitating the replacement of the anti-clogging ball and shortening the replacement time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an anti-screen clogging device for an asphalt mixing plant according to this utility model;

[0020] Figure 2 This is a schematic diagram of the screening structure of an anti-screen clogging device for an asphalt mixing plant according to this utility model;

[0021] Figure 3 This utility model relates to an anti-screen clogging device for asphalt mixing plants. Figure 3 A schematic diagram of the structure after removing the screen.

[0022] Figure 4 This is a schematic diagram of the reciprocating screw of an anti-screen clogging device for an asphalt mixing plant according to this utility model.

[0023] In the attached diagram: 1. Frame; 11. Top cover; 12. Base plate; 13. Connecting plate; 14. Fixing nut; 15. Screw; 16. Tightening nut;

[0024] 2. Screening structure; 21. Frame; 22. Screen mesh; 23. Screening plate; 24. Screening opening;

[0025] 3. Anti-blocking ball; 31. Connecting rod; 32. Rotating shaft; 33. First slider; 34. First slide groove;

[0026] 4. Drive mechanism; 41. Second slider; 42. Second slide groove; 43. Reciprocating lead screw; 44. Through hole; 45. Polygonal rod;

[0027] 5. Passive wheel; 6. Connecting wheel; 7. Driving wheel. Detailed Implementation

[0028] 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. In the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of this utility model.

[0029] refer to Figure 1 As can be seen, this utility model includes multiple screening structures 2 (3-5). The specific number of screening structures 2 can be determined according to the actual use on site. The multiple screening structures 2 are arranged sequentially from top to bottom and connected together. In this embodiment, three screening structures 2 are used. Each screening structure 2 has a screening port 24 at one end. The top screening structure 2 is covered with a top cover 11, and the end of the top cover 11 away from the screening port 24 has a feed port. The bottom of the bottom screening structure 2 is fixed with a bottom plate 12, and a vibration motor that makes the screening structure 2 vibrate is fixed on the bottom plate 12.

[0030] refer to Figure 2 and Figure 3 As can be seen, each screening structure 2 in this embodiment includes a frame 21. A screen 22 parallel to the frame 21 is fixed to the top of the frame 21. The edges of the screen 22 are connected to the front, back, and right sides of the frame 21, respectively. The left edge of the screen 22 is a certain distance away from the left side of the frame 21. A screening plate 23 parallel to the left side wall of the frame 21 is vertically fixed inside the frame 21 at the position corresponding to the left edge of the screen 22. A screening opening 24 is formed between the screening plate 23 and the left side wall of the frame 21. Specifically, the front, back, and right edges of the screen 22 extend to the outside of the front, back, and right side walls of the frame 21. Then, the part of the screen 22 outside the frame 21 is bent downward and fitted to the frame 21. Finally, the part of the screen 22 bent downward and fitted to the frame 21 is fixed together with bolts, thereby fixing the screen 22 to the frame 21. At the same time, in this embodiment, the frame 21 is composed of four side walls spliced ​​together. Two adjacent side walls are fixed together with bolts to form the frame 21.

[0031] Meanwhile, in this embodiment, the aperture of the screen 22 in the screening structure 2 decreases sequentially from top to bottom, that is, the aperture of the screen 22 located at the top is the largest, and the aperture of the screen 22 located at the bottom is the smallest.

[0032] In this embodiment, a connecting plate 13 is placed abutting above the top cover 11. Simultaneously, fixing nuts 14 are fixed to both sides of the bottom plate 12. Each fixing nut 14 is threaded with a vertically upward-extending screw 15. The length of the screw 15 is greater than the height of the multiple screening structures 2 connected together, and each screw 15 extends upward through the connecting plate 13. The portion of each screw 15 above the connecting plate 13 is threaded with a tightening nut 16 that fits against the connecting plate 13. When the top cover 11, the multiple screening structures 2, and the bottom plate 12 are stacked together from top to bottom, the fixing nuts 14, screws 15, connecting plates 13, and tightening nuts 16 work together to fix the top cover 11, the multiple screening structures 2, and the bottom plate 12 into a single unit. Meanwhile, the front and rear sides of the bottom plate 12 are connected to the frame 1 via a buffer mechanism.

[0033] To prevent the screen 22 in the screening structure 2 from becoming clogged during use, this invention includes multiple anti-clogging balls 3 located below the screen 22 in each screening structure 2. These balls can move up and down to impact the screen 22. Specifically, the anti-clogging balls 3 are arranged in two rows along the length of the screen 22. One row is positioned at a distance of 1 / 4 of the width of the screen 22 from the rear wall of the frame 21, and the other row is also positioned at a distance of 1 / 4 of the width of the screen 22 from the front wall of the frame 21. The two rows of anti-clogging balls 3 can alternately impact the screen 22, thereby preventing it from becoming clogged. (Reference) Figure 2 and Figure 3 As can be seen, in this embodiment, two anti-blocking balls 3 that are parallel to the left or right side wall of the frame 21 are connected together by a connecting rod 31. Specifically, the anti-blocking ball 3 has a through hole that cooperates with the connecting rod 31. When the anti-blocking ball 3 is fitted onto the connecting rod 31, the anti-blocking ball 3 is fixed to the connecting rod 31 by bolts.

[0034] A detachable pivot 32 is connected within the frame 21. This pivot 32 is parallel to the front and rear sidewalls of the frame 21 and is located along the length axis of the frame 21. A connecting rod 31 passes through the pivot 32. In this embodiment, to facilitate the detachment of the pivot 32, horizontal first grooves 34 are provided on the right sidewall of the frame 21 and the corresponding screening plate 23. Each first groove 34 is fitted with a first slider 33 capable of sliding within it. Two first sliders 33 are located at opposite ends of the pivot 32 and are rotatably connected to it. When installing the pivot 32, the front sidewall of the frame 21 can be removed, and the first sliders 33 can be installed in the corresponding first grooves 34. Pushing the first sliders 33 will bring the pivot 32 to the length axis of the frame 21. Finally, bolts are used to secure the first sliders 33 on the right sidewall of the frame 21 to the right sidewall, preventing displacement of the pivot 32 during use.

[0035] To ensure that the two rows of anti-blocking balls 3 in the screening structure 2 can alternately impact the screen 22, a drive mechanism 4 for driving the anti-blocking balls 3 is provided on the front side wall of the frame 21. (Reference) Figure 2 and Figure 3 As can be seen, in this embodiment, the driving mechanism 4 includes multiple second slide grooves 42 vertically opened on the inner wall of the front sidewall of the frame 21 corresponding to the position of each connecting rod 31. Each second slide groove 42 is fitted with a second slider 41 that can slide along the second slide groove 42. At the same time, each second slide groove 42 is equipped with a rotatable reciprocating screw 43. The reciprocating screw 43 is vertically installed in the second slide groove 42, and the top end of the reciprocating screw 43 extends upward and is flush with the top of the front sidewall of the frame 21, while the bottom end of the reciprocating screw 43 extends downward and is flush with the bottom of the front sidewall of the frame 21. Meanwhile, referring to Figure 4 It is known that the reciprocating lead screw 43 has a vertical through hole 44 that passes through it, and the cross-section of the through hole 44 is polygonal. In this embodiment, firstly, one end of the connecting rod 31 and the corresponding second slider 41 are hinged together on the outside of the frame 21 through a hinge seat. Then, the first slider 33 is installed in the corresponding first slide groove 34 and pushed so that the rotating shaft 32 is located at the length axis of the frame 21. Then, the first slider 33 located on the right side wall of the frame 21 and the right side wall of the frame 21 are fixed together by bolts. At this time, the front side wall of the frame 21 is attached to the left side wall and the right side wall of the frame 21 and fixed together by bolts to form a complete frame 21. Then, the screen 22 is fixed together with the front side wall of the frame 21. When fixing the screen 22, care should be taken to ensure that the through hole 44 of the reciprocating lead screw 43 is located in the screen hole of the screen 22.

[0036] When multiple assembled screening structures 2 are stacked together, the through holes 44 of all reciprocating screws 43 located on the same vertical line are connected, and then a polygonal rod 45 that matches the through hole 44 is inserted into the through hole 44; at the same time, the top of the polygonal rod 45 extends upward to the top cover 11 and is fixedly fitted with a driven wheel 5, and a connecting wheel 6 is provided between two adjacent driven wheels 5. By driving one driven wheel 5 to rotate, all driven wheels 5 can rotate simultaneously in the same direction, thereby driving all polygonal rods 45 and reciprocating screws 43 to rotate simultaneously in the same direction. When the reciprocating screw 43 rotates, it drives the second slider 41 to slide up and down in the corresponding second slide groove 42. While the second slider 41 slides up and down, it can drive the corresponding connecting rod 31 to rotate up and down around the rotating shaft 32, thereby causing the two anti-blocking balls 3 on the connecting rod 31 to move up and down alternately to hit the screen 22, thereby preventing the screen 22 from clogging. When the anti-blocking ball 3 moves upward, it can collide with the screen 22 in the corresponding screening structure 2. When it moves downward, it can collide with the screen 22 in the adjacent lower screening structure 2, thereby enhancing the impact effect and further preventing the screen 22 from clogging.

[0037] In this embodiment, a drive motor is fixed on the top cover 11, and a drive wheel 7 is fixedly sleeved on the output shaft of the drive motor. The drive wheel 7 is connected to any one of the connecting wheels 6. Thus, the drive motor drives the drive wheel 7 to rotate, and the rotating drive wheel 7 then drives all the driven wheels 5 to rotate simultaneously in the same direction through the connecting wheel 6.

[0038] The working principle of the anti-screen clogging device in the asphalt mixing plant of this embodiment is as follows:

[0039] First, assemble the three screening structures 2. Then, stack the three screening structures 2 together and fix them according to the size of the screen mesh 22, and then install them on the frame 1. In this embodiment, the aggregate discharged from the drying and heating system enters the embodiment through the feed inlet for screening. The screened aggregate then enters the metering and mixing system.

[0040] When the anti-clogging ball 3 needs to be replaced, simply stop the machine in this embodiment, then remove the bolts between the screen 22 of the screening structure 2 that needs to replace the anti-clogging ball 3 and the front side wall of the frame 21, and at the same time remove the bolts between the first slider 33 and the right side wall of the frame 21, the front side wall of the frame 21 and the left / right side wall of the frame 21; then pull the polygonal rod 45 out of the through hole 44, and at this time, pull the front side wall of the frame 21 outward to pull out the rotating shaft 32, the connecting rod 31 and the anti-clogging ball 3 from the frame 21, so that the anti-clogging ball 3 can be replaced without disassembling the entire machine.

[0041] Example 2

[0042] In this embodiment, based on Embodiment 1, to ensure the smooth movement of the first slider 33 within the first slide groove 34 and the second slider 41 within the second slide groove 42, both the edges of the first slider 33 and the second slider 41 are provided with chamfers. When the first slider 33 and the second slider 41 move, even if there is aggregate in the first slide groove 34 and the second slide groove 42, the chamfers can discharge the aggregate from the first slide groove 34 / second slide groove 42, thereby ensuring the smooth movement of the first slider 33 / second slider 41.

[0043] All components in this embodiment are made of wear-resistant alloy steel (such as AR steel), thereby extending the service life of this embodiment.

[0044] In the above embodiments, this utility model provides an anti-screen clogging device for an asphalt mixing plant. In this utility model, multiple stacked screening structures 2 can be used to classify and screen aggregates. Compared with traditional multi-layer vibrating screens that rely on the elasticity of rubber balls to impact the screen 22, this utility model uses a drive mechanism 4 to drive two rows of anti-clogging balls 3 to alternately impact the screen 22, thereby preventing the screen 22 from clogging. As long as the drive mechanism 4 does not damage the anti-clogging balls 3, the impact will not stop, thereby reducing the probability of screen 22 clogging. At the same time, both the drive mechanism 4 and the anti-clogging balls 3 in this utility model can be disassembled for easy replacement.

[0045] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. A device for preventing screen clogging in an asphalt mixing plant, comprising a frame (1), characterized in that: The frame (1) is provided with multiple screening structures (2) stacked together to screen aggregates through screens (22). Each screening structure (2) is detachably connected with two rows of anti-blocking balls (3) that can move up and down alternately to impact the screens (22). Each screening structure (2) is also detachably provided with a drive mechanism (4) that drives the two rows of anti-blocking balls (3) to move up and down alternately.

2. The anti-screen clogging device for an asphalt mixing plant according to claim 1, characterized in that: Each of the screening structures (2) includes a frame (21), a screen (22) for screening aggregate is fixed at the top of the frame (21), an anti-blocking ball (3) is located below the screen (22), and a driving structure is set on the inner wall of the frame (21); wherein, a vertical screening plate (23) is fixed at the edge of the screen (22), and a screening opening (24) is formed between the screening plate (23) and the frame (21).

3. The anti-screen clogging device for an asphalt mixing plant according to claim 2, characterized in that: Each row of anti-blocking balls (3) is evenly distributed along the length of the frame (21). At the same time, two anti-blocking balls (3) located on the same longitudinal straight line are connected together by connecting rods (31), and one end of each connecting rod (31) is hinged to the drive mechanism (4).

4. The anti-screen clogging device for an asphalt mixing plant according to claim 3, characterized in that: The frame (21) is detachably connected to a pivot (32) at a position corresponding to its length axis, and each connecting rod (31) passes through the pivot (32).

5. The anti-screen clogging device for an asphalt mixing plant according to claim 4, characterized in that: Both ends of the rotating shaft (32) are rotatably connected to a first slider (33), which is horizontally slidably disposed on the inner wall of the screening plate (23) and the frame (21).

6. A screen clogging prevention device for an asphalt mixing plant according to any one of claims 1-5, characterized in that: The driving mechanism (4) includes a second slider (41) that can move up and down on the inner wall of the frame (21), and the second slider (41) is hinged to one end of the connecting rod (31).

7. The anti-screen clogging device for an asphalt mixing plant according to claim 6, characterized in that: The inner wall of the frame (21) is provided with a second slide groove (42) that is adapted to the second slide groove (41) at the position corresponding to the second slide groove (41), and a vertical reciprocating screw (43) is provided in the second slide groove (42); wherein, the top end of the reciprocating screw (43) extends upward and is flush with the top of the frame (21), and the bottom end of the reciprocating screw (43) extends downward and is flush with the bottom of the frame (21).

8. The anti-screen clogging device for an asphalt mixing plant according to claim 7, characterized in that: The reciprocating lead screw (43) has a through hole (44) with a polygonal cross-section that is vertically penetrating the reciprocating lead screw (43), and a polygonal rod (45) that is compatible with the through hole (44) is inserted into the through hole (44).

9. The anti-screen clogging device for an asphalt mixing plant according to claim 8, characterized in that: The top of the polygonal rod (45) extends upward to the top cover (11) and is fixedly fitted with a passive wheel (5). Multiple passive wheels (5) are connected together by a connecting wheel (6).

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