A continuous conveying and feeding device for slag

Abstract

The present invention relates to the field of slag transportation technology, and in particular to a continuous conveying and feeding device for slag, which includes a fixed support, a conveyor belt, a motor and a screening mechanism, wherein the screening mechanism includes a bracket, a plurality of limiting collars and a screen, wherein the plurality of limiting collars correspond to the screen and are vertically connected through the bracket, the inner sidewalls of the limiting collars are provided with transverse scrapers, the screen is vertically fixedly connected through a central column, and the surface of the conveyor belt is provided with a cam structure along the length direction for causing the screening mechanism to shake and rotate. The present invention drives the rotation of the screening mechanism through the cam structure on the surface of the conveyor belt to realize the unloading process, and at the same time drives the screen to shake periodically to realize the graded screening of the screen; through the vertical layered design of the screen, the three-level sorting of large particles, medium particles and fine particles is synchronously completed during the conveying process.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel slag transportation, and in particular to a continuous conveying and feeding device for tunnel slag. Background Art

[0002] Tunnel slag is waste rock generated during the excavation of underground projects such as tunnels and mines. Composed primarily of hard rock, it possesses high strength and recycling value, making it commonly used in areas such as manufactured sand production and roadbed filling. Existing technologies require multiple steps for resource utilization, including crushing, screening, grading, and conveying. The screening process relies on independent vibrating screens or drum screens to separate slag of varying particle sizes, which are then transported to corresponding processing equipment via conveyor belts. While this approach can achieve basic sorting functions, it suffers from the following significant drawbacks.

[0003] First, traditional screening equipment requires an independent vibration motor or drive mechanism, which is separated from the conveying system for operation. This results in a large equipment footprint, superimposed energy consumption (such as the vibrating screen requires additional electricity consumption), and the sorted materials need to be transported twice, which is inefficient. Secondly, the sorting accuracy and continuity of the slag are insufficient. Under high-load conditions, the vibrating screen is prone to clogging of the screen holes due to material accumulation, requiring frequent shutdowns for cleaning, and the sorting effect on flat slag is poor, resulting in mixed particle sizes. In addition, the equipment has poor coordination, and the screening and conveying actions are controlled independently. The screening intensity and conveying speed cannot be dynamically adjusted according to the material characteristics, resulting in a mismatch between the screen vibration frequency and the material flow rate, affecting the sorting uniformity. For this reason, there is an urgent need for a conveying and feeding device that is both continuous and functionally integrated. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a continuous conveying and feeding device for slag.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A continuous conveying and feeding device for slag, comprising a fixed support, a conveyor belt and a motor, wherein the conveyor belt is mounted on the fixed support via a rotating shaft, the motor is assembled on the fixed support and is connected to the conveyor belt, a screening mechanism is also mounted on the fixed support, the screening mechanism comprises a bracket, a plurality of limiting collars and a screen, the plurality of limiting collars correspond to the screen and are vertically connected via the bracket, the bracket is mounted on one side of the conveyor belt, a notch is provided on one side of the upper end face of the limiting collar, a scraper is provided at the notch to horizontally guide the center of the screen, the The screen is vertically fixedly connected by a central column, and the bottom of the central column is rotatably connected to a U-shaped fixing plate through a rotating shaft. The U-shaped fixing plate is horizontally arranged and a vertically arranged elastic compression rod is installed at the free end. The elastic compression rod is fixedly installed on the other side of the conveyor belt. The bottom of the elastic compression rod is also provided with a lifting assembly for periodically controlling the lifting and lowering of the elastic compression rod. A positioning cross bar is provided between the two elastic compression rods, and a stud bolt is sleeved on the positioning cross bar. An outer gear ring is provided around the bottom of the screen, and the outer gear ring is engaged with the upper end of the stud bolt.

[0007] A cam structure is provided on the surface of the conveyor belt along the length direction, and a rack is provided on the side wall of the cam structure, which engages with the lower end of the stud bolt. A plurality of partition plates installed on a fixed support are provided at the end of the conveyor belt, and partition channels are formed between the plurality of partition plates. Guide plates are respectively provided on the partition channels, and the plurality of guide plates respectively guide to notches at different positions, and the ends of the partition plates guide to external loading containers.

[0008] The cam structure is composed of a number of semicircular protrusions or arc-shaped protrusions, and a number of semicircular protrusions or arc-shaped protrusions are continuously connected to form the cam structure. The bolt at the lower end of the stud bolt is engaged with the rack provided on the side wall of the cam structure, so that when the motor drives the conveyor belt to move, the stud bolt rotates accordingly. In addition, the middle section of the positioning crossbar is provided with an arc-shaped slot, and the middle section of the stud bolt is sleeved on the arc-shaped slot, and clamps are provided above and below the clamping part of the stud bolt, which ensures that no vertical relative movement occurs during the rotation of the stud bolt. During the rotation of the stud bolt, the bolt at the upper end of the stud bolt is engaged with the outer gear ring, and the center column is connected to the U-shaped fixed plate through a rotating shaft. Therefore, during the operation of the conveyor belt, the screening mechanism rotates synchronously.

[0009] Furthermore, an arc-shaped clip is provided on the side of the elastic compression rod facing the conveyor belt, with the arc surface of the arc-shaped clip facing downward, and the arc-shaped clip abuts against the cam structure to realize the periodic shaking of the screen. When the raised contour of the cam structure contacts the arc-shaped clip, the elastic compression rod is stretched and deformed. When the arc-shaped clip contacts the recessed section of the cam structure, the elastic compression rod falls back to its original state, driving the screen to quickly reset and form high-frequency shaking. Through the periodic abutment of the arc-shaped clip and the cam structure, the linear motion of the conveyor belt is converted into the reciprocating compression and release action of the elastic compression rod, driving the screen to shake up and down. Preferably, the height of the rack is greater than the bolt height of the lower end of the stud bolt, and the height of the outer gear ring is greater than the bolt height of the upper end of the stud bolt. When the screen vibrates up and down due to the action of the cam structure, the stud bolts will also have a slight up and down amplitude. At this time, since the height of the upper and lower ends of the stud bolts are less than the height of the meshing rack and the outer gear ring, the stud bolts will not be dislodged. At the same time, lubricating oil and other lubricating fillers that reduce friction are added at the meshing point to make the sliding more smooth and natural, thereby ensuring the normal operation and service life of the structure.

[0010] Furthermore, each of the plurality of limiting collars is provided with a scraper, positioned toward one side of the partition plate, with the upper end of the guide plate vertically aligned with any of the notches. The scraper is fixedly mounted on the upper end surface of the limiting collar, and the screen mesh and limiting collar are movably arranged. The mesh diameter of the screen mesh is slightly smaller than the inner diameter of the limiting collar, ensuring that the slag does not fall off the edges during the screen mesh's shaking. The limiting collar serves to protect the edges of the screen mesh. As the screen mesh rotates, the slag is blocked by the scraper and screened for a period of time. After a certain period of time, the lifting assembly controls the screen mesh to rise to a height where the top surface of the screen mesh abuts the bottom surface of the scraper. During this process, the lower end bolts of the studs remain engaged with the rack. When the slag on the screen mesh rotates to the scraper, the accumulated slag falls through the notches. The slag on the inner ring of the screen mesh is also guided along the direction of the scraper to the notches and falls, then enters the corresponding guide plate, achieving slag sorting. The upper end of the guide plate is aligned with the vertical projection area of ​​the scraper directly above it, so that the scraped slag falls directly into the collection range of the guide plate.

[0011] Furthermore, the length of the scraper is equal to the radius of the screen, and the height of the scraper is no greater than the height of the retaining collar. During screen rotation, the scraper ensures that any debris located anywhere on the screen is within its coverage. As the screen rotates, the debris inside the scraper continuously moves toward the periphery along the scraper's inclined surface until it falls through the notch. Furthermore, the scraper effectively cleans the screen surface, maintaining the long-term operational stability of the screening mechanism.

[0012] Furthermore, the limiting collar and the screen are provided in plurality, the limiting collars corresponding to the screens and connected vertically by brackets, the screens are fixedly connected vertically by a central column, and the screening plate is provided on the side facing the notch. Specifically, due to the difference in size, the external dimensions of the hole slag are different, and the difference in outer diameter can be used to screen hole slag of different particle sizes. When the hole slag rotates to the scraper with the screen, the large-sized hole slag is supported by the screen plate and then guided into the guide plate along the outer wall of the screen plate. The smaller hole slag can pass through the height limit of the screen plate and enter the bottom of the screen plate, and follow the rotation of the screen, guided by the scraper, into the guide plate. Preferably, the fork plate is located in the middle of the guide plate, and the width of the screen plate is equal to the distance between the fork plate and the side wall of the guide plate. Therefore, during the rotation of the screen, the larger hole residues are introduced into the channel of one of the guide plates along the outer wall of the screening plate, and the smaller hole residues are introduced into the channel of the other guide plate along the side wall of the scraper.

[0013] Furthermore, the screen includes a top screen, a middle screen and a bottom screen, and the mesh sizes of the top screen, the middle screen and the bottom screen decrease in sequence. Since the uses of slag of different sizes are different, after the slag is transported out, it needs to be classified and screened, and then transferred to the corresponding processing equipment for use. The three-level screen is used for step-by-step screening to achieve the screening of large-particle slag (for roadbed filling), medium-particle slag (for sand making) and fine-particle slag (for fine processing). Through graded screening, the screening operation can be completed during the transportation process, which not only reduces the waiting process for screening, but also reduces equipment investment and labor costs, thereby improving efficiency.

[0014] Furthermore, the top screen, the middle screen and the bottom screen are at the same horizontal height as the bottom surfaces of the corresponding limiting collars. When the arc-shaped clamp contacts the recessed section of the cam structure, the elastic compression rod returns to its original state, at which point the screen and the bottom surfaces of the limiting collar are at the same horizontal height. When the raised profile of the cam structure contacts the arc-shaped clamp, the screen moves up, and this continuous process can cause the screen to vibrate at a high frequency. During the shaking process, the limiting collar always protects and limits the edge of the screen to prevent the slag from falling from the edge during the shaking process.

[0015] Furthermore, the lifting assembly is equipped with a telescopic rod for pushing the elastic compression rod upward, and the movable length of the telescopic rod is the distance between the screen and the bottom of the scraper. The lifting assembly is equipped with a control system and a timing assembly. When the external transmission guide mechanism introduces the slag from directly above the screening mechanism, that is, above the top screen, the screen continuously shakes and screens the slag. After a certain period, the screening work meets the established requirements. At this time, the lifting assembly periodically controls the telescopic rod to rise, causing the screen to rise and the top surface of the screen to abut against the scraper. Since the slag left at the top screen is all large-particle slag (smaller-particle slag has fallen to the lower layer), this part of the slag is blocked by the baffle and guided to the notch, and then falls into the guide plate.

[0016] Furthermore, a transmission and guiding mechanism is externally connected above the top screen to guide the top screen. The output end of the other transmission and guiding mechanism is located directly above the top screen, ensuring that the slag can be completely introduced into the device with integrated transportation and screening effects.

[0017] Furthermore, the number of loading containers corresponds to the number of separation channels, and the width of the loading containers is adapted to the width of the separation channels. The separation channels enable precise collection of the sorted slag, preventing the mixing of slag of different particle sizes. This not only simplifies the subsequent transfer process, but also allows the corresponding slag to be directly collected for different processing steps in the back-end process.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention integrates the screening mechanism into the conveyor belt system. The cam structure on the conveyor belt surface drives the rotation of the screening mechanism to realize the unloading process. At the same time, it drives the screen to vibrate periodically to achieve graded screening of the screen. No additional vibration motor or power source is required, thus reducing energy consumption.

[0020] 2. The present invention uses a vertically layered screen design combined with directional guidance of the separation channel to simultaneously complete three-level sorting of large particles (roadbed filling), medium particles (sand making raw materials), and fine particles (fine processing) during the transportation process, thereby improving screening efficiency. The end of the separation plate is directly connected to the external loading container to avoid secondary transfer.

[0021] 3. The abutment design of the elastic compression rod and the cam structure of the present invention can automatically adjust the screen vibration frequency according to the conveyor belt speed to prevent material blockage. At the same time, the cooperation of the limit ring and the scraper can clean the screen surface in real time, reduce the layout of additional mechanical equipment, and reduce site occupation and labor and material consumption costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention Figure 2 ;

[0024] Figure 3 yes Figure 2 A magnified schematic diagram of point A in the middle;

[0025] Figure 4 It is a planar schematic diagram of the cooperation between the cam structure and the arc-shaped clamp;

[0026] Figure 5 It is a structural diagram of the screening mechanism;

[0027] Figure 6 This is a schematic diagram of the scraper with an arc structure in the fourth embodiment;

[0028] Figure 7 is a structural diagram of embodiment 3;

[0029] Figure 8 is a schematic diagram of the screening mechanism of Example 3;

[0030] Figure 9 This is a perspective diagram of the screening mechanism of the third embodiment;

[0031] Figure 10 is a plan view of the screen in Example 3;

[0032] Figure identification: 1-fixed support, 2-conveyor belt, 3-screening mechanism, 4-limiting ring, 5-screen, 501-top screen, 502-middle screen, 503-bottom screen, 6-notch, 7-scraper, 8-screening plate, 9-guide plate, 10-rotating shaft, 11-elastic compression rod, 12-lifting assembly, 13-stud bolt, 14-outer gear ring, 15-cam structure, 16-rack, 17-U-shaped fixing plate, 18-arc-shaped clip, 19-partition plate, 20-fork plate, 21-carrying container, 22-positioning cross bar, 23-bracket, 24-center column. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0034] Example 1, as Figure 1-Figure 5As shown, the present invention discloses a continuous conveying and feeding device for slag, comprising a fixed support 1 equipped with a conveyor belt 2, a screening mechanism 3 further mounted on the fixed support 1, the screening mechanism 3 comprising a limiting collar 4 and a screen 5, a notch 6 being provided on one side of the upper end face of the limiting collar 4, a scraper 7 being provided at the notch 6 to horizontally guide the center of the screen 5, a screening plate 8 for abutting and screening slag of different sizes being horizontally provided on the side wall of the scraper 7, a guide plate 9 for guiding the slag out of the slag at the outer end of the notch 6, and the screen 5 The bottom of the conveyor belt 2 is rotatably connected to an elastic compression rod 11 through a rotating shaft 10. The bottom of the elastic compression rod 11 is also provided with a lifting assembly 12 for periodically controlling the lifting and lowering of the elastic compression rod 11. A stud bolt 13 is provided on the elastic compression rod 11. An outer gear ring 14 is provided around the bottom of the screen 5. The outer gear ring 14 is engaged with the upper end of the stud bolt 13. A cam structure 15 is provided on the surface of the conveyor belt 2 along the length direction. A rack 16 is provided on the side wall of the cam structure 15. The rack 16 is engaged with the lower end of the stud bolt 13.

[0035] Specifically, a motor is also provided on the fixed support 1, and the conveyor belt 2 is installed on the fixed support 1 through a rotating shaft. The motor is assembled on the fixed support 1 and is connected to the conveyor belt 2. The cam structure 15 is composed of a plurality of semicircular protrusions or arc-shaped protrusions, and a plurality of semicircular protrusions or arc-shaped protrusions are continuously connected to form the cam structure 15. The bolt at the lower end of the stud bolt 13 is toothed with the rack 16 provided on the side wall of the cam structure 15, so that when the motor drives the conveyor belt 2 to move, the stud bolt 13 rotates accordingly. In addition, an arc-shaped slot is provided in the middle section of the positioning cross bar 22, and the middle section of the stud bolt 13 is sleeved on the arc-shaped slot, and clamps are provided above and below the clamping portion of the stud bolt 13, which can ensure that no vertical relative movement occurs during the rotation of the stud bolt 13. During the rotation of the stud bolt 13, the bolt at the upper end of the stud bolt 13 is engaged with the outer gear ring 14, and the center column 24 is rotatably connected to the U-shaped fixing plate 17 through the rotating shaft 10. Therefore, during the operation of the conveyor belt 2, the screening mechanism 3 rotates synchronously.

[0036] Preferably, the screening mechanism 3 periodically discharges the slag. Therefore, during the screening process, the screen 5 is lifted to discharge the slag that has been screened, ensuring that the weight of the slag does not exceed the load capacity of the lifting assembly 12. Furthermore, the cam structure 15 is used to bear the weight of the screen 5. The screen 5 always presses on the cam structure 15, and when it runs on the concave and convex surface of the cam structure 15, it produces up and down fluctuations.

[0037] The rotating shaft 10 is connected to the elastic compression rod 11 through a U-shaped fixing plate 17. The U-shaped fixing plate 17 is horizontally arranged and the free end is connected to the vertically arranged elastic compression rod 11. The elastic compression rod 11 is fixedly installed on the other side of the conveyor belt 2. The elastic compression rod 11 is provided with an arc-shaped clamp 18 on the side facing the conveyor belt 2. The arc surface of the arc-shaped clamp 18 faces downward. The arc-shaped clamp 18 abuts against the cam structure 15 to achieve periodic shaking of the screen 5. Specifically, when the convex profile of the cam structure 15 contacts the arc-shaped clamp 18, the elastic compression rod 11 is stretched and deformed. When the arc-shaped clamp 18 contacts the concave section of the cam structure 15, the elastic compression rod 11 falls back to its original state, driving the screen 5 to quickly reset and form high-frequency shaking. Through the periodic abutment of the arc-shaped clamp 18 with the cam structure 15, the linear motion of the conveyor belt 2 is converted into the reciprocating compression and release action of the elastic compression rod 11, driving the screen 5 to shake up and down. Preferably, the height of the rack 16 is greater than the height of the bolts at the lower end of the stud 13, and the height of the outer gear ring 14 is greater than the height of the bolts at the upper end of the stud 13. When the screen 5 is shaken up and down by the cam structure 15, the stud 13 will also have a slight up and down amplitude. At this time, since the height of the upper and lower ends of the stud 13 are both less than the height of the meshing rack 16 and the outer gear ring 14, the stud 13 will not be dislodged. At the same time, lubricating fillers such as lubricating oil are added to the meshing part to reduce friction, making the sliding more smooth and natural, thereby ensuring the normal operation and service life of the structure. This structural setting can improve the screening efficiency of the screening mechanism 3, without the need for a vibration motor, and use the power of the conveyor belt 2 itself to achieve the mechanical vibration required for screening, thereby reducing energy consumption.

[0038] The conveyor belt 2 is provided with a plurality of partition plates 19 at the end thereof, with partition channels formed between the plurality of partition plates 19. A fork plate 20 is provided on the guide plate 9, which guides the slag to the partition channels at different locations. The end of the partition plate 19 guides the slag to an external loading container 21. The scraper 7 is provided toward one side of the partition plate 19, and the upper end of the guide plate 9 is vertically aligned with any of the notches 6. Specifically, the scraper 7 is fixedly mounted on the upper end surface of the limiting collar 4, and the screen 5 is movably arranged with the limiting collar 4. The mesh diameter of the screen 5 is slightly smaller than the inner diameter of the limiting collar 4, ensuring that the slag does not fall off the edge during the shaking of the screen 5. The limiting collar 4 is used to provide a protective barrier to the edge of the screen 5. As the screen 5 rotates, the slag is blocked by the scraper 7 and screened for a period of time. After a certain period of time, the lifting assembly 12 controls the screen 5 to rise to a height where the top surface of the screen 5 abuts the bottom surface of the scraper 7. During this process, the lower end of the stud 13 remains engaged with the rack 16. When the slag on the screen 5 rotates to the scraper 7, the accumulated slag will fall through the notch 6. The slag on the inner ring of the screen 5 will also be guided along the direction of the scraper 7 to the notch 6 and fall, then enter the corresponding guide plate 9, completing the classification of the slag. The upper end of the guide plate 9 is aligned with the vertical projection area of ​​the scraper 7 directly above, so that the scraped slag falls directly into the collection range of the guide plate 9.

[0039] Preferably, the material of the screen 5 is selected to have a certain elasticity of the screen mesh to ensure that the scraper 7 and the hole slag will not get stuck. After the daily process work is completed, the hole slag stuck on the mesh is cleaned. The gap 6 is at a certain height from the bottom of the limiting ring 4. Only when the screen 5 rises, the lowest point of the gap 6 is flush with the upper surface of the screen 5, ensuring that the hole slag will be exported from here. Before the screen 5 rises, when the thickness of the hole slag is guaranteed to cover the vicinity of the gap 6, a cycle can be executed, that is, the screen 5 is raised to perform the export operation. In this process, the vibration effect can achieve the purpose of screening.

[0040] The length of the scraper 7 is equal to the radius of the screen 5. A positioning crossbar 22 is provided between the two elastic compression rods 11, and the stud 13 is sleeved onto the positioning crossbar 22. Specifically, during the rotation of the screen 5, the scraper 7 ensures that all slag in any position on the screen 5 is within the coverage area of ​​the scraper 7. As the screen 5 rotates, the slag inside the scraper 7 continuously moves toward the periphery along the inclined surface of the scraper 7 until it falls through the notch 6. Furthermore, the scraper 7 effectively cleans the surface of the screen 5, maintaining the long-term operational stability of the screening mechanism 3.

[0041] The lifting assembly 12 is equipped with a telescopic rod for pushing the elastic compression rod 11 upward. The movable length of the telescopic rod is the distance between the screen 5 and the bottom of the scraper 7. Specifically, the lifting assembly 12 is equipped with a control system and a timing assembly. When the external transmission guide mechanism introduces the slag from directly above the screening mechanism 3, the screen 5 continuously shakes and screens the slag. After a certain period of time, when the screening performance reaches the specified level, the lifting assembly 12 periodically controls the telescopic rod to rise, causing the screen 5 to rise and the top surface of the screen surface to abut against the scraper 7. As the slag rotates with the screen 5 to the scraper 7, large slag is held against the screen plate 8 and guided along its outer wall into the guide plate 9. Smaller slag can pass through the height limit of the screen plate 8 and enter the bottom of the screen plate 8. Following the rotation of the screen 5, it is guided by the scraper 7 and enters the guide plate 9. Preferably, the fork plate 20 is located in the middle of the guide plate 9, and the width of the screening plate 8 is equal to the distance between the fork plate 20 and the side wall of the guide plate 9. Therefore, during the rotation of the screen 5, larger hole debris follows the outer wall of the screening plate 8 and is introduced into the channel of one of the guide plates 9, while smaller hole debris follows the side wall of the scraper 7 and is introduced into the channel of the other guide plate 9.

[0042] The top of the top screen 501 is externally connected to a transmission and material guiding mechanism above the guide screen 5. Specifically, the output end of the other transmission and material guiding mechanism is located just above the screen 5, ensuring that the slag can be completely introduced into the device with integrated transportation and screening effects.

[0043] The number of loading containers 21 corresponds to the number of separation channels, and the width of the loading containers 21 is adapted to the width of the separation channels. Specifically, the separation channels enable precise collection of post-sorting slag, preventing the mixing of slag of varying particle sizes. This not only simplifies subsequent transfer processes but also allows for direct collection of the corresponding slag for different processing steps in the back-end process.

[0044] Example 2: Based on Example 1, this example proposes a working principle of a continuous conveying and feeding device for slag.

[0045] The specific implementation steps are as follows:

[0046] Start the motor to drive the conveyor belt 2 to run at a constant speed. The cam structure 15 provided on the surface of the conveyor belt 2 moves synchronously with the conveyor belt 2. The rack 16 on the side wall of the cam structure 15 engages with the lower end of the stud bolt 13. When the conveyor belt 2 moves, the stud bolt 13 rotates around the arc-shaped groove of the positioning cross bar 22. The upper end of the stud bolt 13 engages with the outer gear ring 14, driving the screen 5 to rotate synchronously. The cam structure 15 on the conveyor belt 2 periodically contacts the arc-shaped clamp 18 of the elastic compression rod 11. When the raised section of the cam structure 15 pushes the arc-shaped clamp 18, the elastic compression rod 11 is compressed and deformed, driving the screen 5 to move upward. When the recessed section of the cam structure 15 arrives, the elastic compression rod 11 releases the elastic force, and the screen 5 quickly resets, forming a high-frequency vertical shake. The slag is evenly distributed across the surface of the screen 5 via the transmission and guide mechanism. Through periodic shaking, slag smaller than the mesh size of the screen 5 passes through the screen 5 and falls onto the conveyor belt 2, where it then enters the separator plate 19. Larger particles that fail to pass through are retained on the surface of the screen 5. After a certain period of shaking, the lifting assembly 12 controls the screen 5 to rise, bringing the top surface of the screen 5 into contact with the bottom surface of the scraper 7. As the slag on the screen 5 rotates to the scraper 7, the accumulated slag is directed by centrifugal force to the outside of the screen 5, where it falls through the notches 6. Slag of different sizes is guided along the outer wall of the screening plate 8 and the sidewalls of the scraper 7 into the guide plate 9 for separation. Slag located on the inner ring of the screen 5 is also guided along the scraper 7 or the screening plate 8 to the notches 6, where it falls and then enters the corresponding guide plate 9, thus separating the slag.

[0047] Embodiment 3: Based on embodiment 1, this embodiment proposes a screening mechanism with multiple layers of screens.

[0048] like Figure 7-10 As shown, the limiting collar 4 and the screen 5 are provided in plurality, and the limiting collars 4 correspond to the screen 5 and are vertically connected by the bracket 23. The screen 5 is vertically fixedly connected by the central column 24. The screening plate 8 is provided on the side facing the notch 6. Specifically, due to the difference in size, the external dimensions of the hole slag are different. The difference in outer diameter can be used to screen hole slag of different particle sizes. When the hole slag rotates to the scraper 7 following the screen 5, the large-sized hole slag is resisted by the screen plate 8 and then guided along the outer wall of the screen plate 8 into the guide plate 9. The smaller hole slag can pass through the height limit of the screen plate 8 and enter the bottom of the screen plate 8. Following the rotation of the screen 5, it is guided by the scraper 7 and enters the guide plate 9. In addition, due to the provision of a screen structure with different apertures, multi-layer fine screening can also be achieved. Since the hole residues retained at the top screen 501 are all large-particle hole residues (smaller-particle hole residues have fallen to the lower layer), this part of the hole residues enters the partition plate 19 along the conveyor belt 2 and then falls into the loading container 21.

[0049] The multiple screens 5 include a top screen 501, a middle screen 502, and a bottom screen 503. The mesh sizes of the top screen 501, the middle screen 502, and the bottom screen 503 decrease in sequence. Specifically, since the uses of slag of different sizes are different, after the slag is transported out, it needs to be classified and screened, and then transferred to the corresponding processing equipment for use. The three-level screens are used for step-by-step screening to achieve the screening of large-particle slag (for roadbed filling), medium-particle slag (for sand making), and fine-particle slag (for fine processing). Through graded screening, the screening operation can be completed during the transportation process, which not only reduces the waiting time for screening, but also reduces equipment investment and labor costs, thereby improving efficiency. Among them, only the outer gear ring 14 is provided below the bottom screen 503, which is used to engage with the upper end of the stud bolt 13.

[0050] The top screen 501, the middle screen 502 and the bottom screen 503 are at the same horizontal height as the bottom surface of the corresponding limiting collar 4. Specifically, when the arc-shaped clamp 18 contacts the recessed section of the cam structure 15, the elastic compression rod 11 returns to its original state, at which time the screen 5 and the bottom surface of the limiting collar 4 are at the same horizontal height. When the raised profile of the cam structure 15 contacts the arc-shaped clamp 18, the screen 5 moves upward, and this continuous process can cause the screen 5 to form high-frequency jitter. During the jittering process, the limiting collar 4 always protects and limits the edge of the screen 5 to prevent the hole slag from falling from the edge during the jittering process.

[0051] The operating steps are as follows: The motor is started, and the screens 5 (top screen 501, middle screen 502, and bottom screen 503) rotate synchronously. The slag is evenly distributed onto the surface of the top screen 501 via the transmission guide mechanism. Through periodic shaking, slag smaller than the aperture of the top screen 501 (medium and fine particles) passes through the screen 5 and falls onto the middle screen 502 and bottom screen 503. Large particles that fail to pass through are retained on the surface of the top screen 501. After a certain period of shaking, the slag of different particle sizes is separated. The lifting assembly 12 controls the screen 5 to rise, and the top surface of the screen 5 contacts the bottom surface of the scraper 7. When the slag on the screen 5 reaches the scraper 7, the accumulated slag is directed to the outside of the screen 5 due to centrifugal force, falling out of the notch 6. Slag on the inner ring of the screen 5 is also guided along the scraper 7 to the notch 6, where it falls and then enters the corresponding guide plate 9, completing the slag separation. The middle screen 502, in a similar manner, directs medium-sized particles (those with apertures between the middle screen 502 and the top screen 501) into another guide plate 9. Oversized particles (for roadbed filling) removed by the top screen 501 enter one of the separate channels, medium particles (for sand production) removed by the middle screen 502 enter another separate channel, and fine particles (for fine processing) removed by the bottom screen 503 enter the remaining separate channels via the conveyor belt 2. Guide plates 9 at the end of each separate channel precisely direct the material into the corresponding loading container 21, whose width matches the channel size. Screens of different apertures can be replaced by removing the U-shaped fixing plate 17 connected to the rotating shaft 10 of the center column 24.

[0052] Example 4: Based on Example 1, this example proposes a structure for improving the continuous conveying efficiency of slag.

[0053] like Figure 6 As shown, when the screen 5 rotates at a high power, the continuous rotation of the screen 5 generates a large centrifugal force on the debris, which is guided to the edge along the scraper wall. When the screen 5 rotates at a low power, the scraper 7 adopts an arc-shaped structure. The convex curved surface of the scraper 7 contacts the rotating surface of the screen, and the debris is pushed by the scraper 7 and moves along the convex curved surface of the scraper 7. At this time, the centrifugal force causes the debris to gradually move toward the periphery, thereby improving the efficiency of the debris separation from the screen 5.

[0054] Example 5: Based on Example 1, this example proposes a structure for improving the continuous conveying efficiency of slag.

[0055] The output end of the transmission and guide mechanism is equipped with a flat outlet, which evenly distributes the slag entering the screening mechanism 3 onto the top screen 501, preventing local overload. Because slag transportation requires traversing long tunnels, muddy roads, and other complex sections, this device is located outside the tunnel entrance. The transmission and guide mechanism, which is guided from the tunnel entrance, spreads the slag at a constant flow rate onto the surface of the top screen 501. The slag is then vibrated in conjunction with the vibration of the screen 5 to obtain slag that is ready for direct use after screening.

[0056] The present invention integrates the screening mechanism 3 into the conveyor belt system, and drives the rotation of the screening mechanism 3 through the cam structure 15 on the surface of the conveyor belt 2 to realize the unloading process, and at the same time drives the screen 5 to vibrate periodically to realize the graded screening of the screen 5, without the need for an additional vibration motor or power source, thereby reducing energy consumption. Through the vertical layered design of the screen 5, three-level sorting or more levels of sorting of large particles (roadbed filling), medium particles (sand making raw materials) and fine particles (fine processing) are simultaneously completed during the transportation process, thereby improving the screening efficiency. Moreover, the end of the partition plate 19 is directly connected to the external cargo container 21 to avoid secondary transportation. The abutment design of the elastic compression rod 11 and the cam structure 15 can automatically adjust the vibration frequency of the screen 5 according to the speed of the conveyor belt 2 to prevent material blockage. At the same time, the cooperation of the limit ring 4 and the scraper 7 can clean the surface of the screen 5 in real time, reduce the layout of additional mechanical equipment, and reduce the site occupation and the consumption cost of manpower and material resources.

[0057] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A continuous conveying and feeding device for slag, comprising a conveyor belt (2), a screening mechanism (3) and a loading container (21), wherein the screening mechanism (3) comprises a limiting collar (4) and a screen (5), and is characterized in that: A notch (6) is provided on one side of the upper end face of the limiting collar (4), a scraper (7) is provided at the notch (6), a screening plate (8) is provided horizontally on the side wall of the scraper (7), a guide plate (9) for guiding the slag out of the hole is provided at the outer end of the notch (6), an elastic compression rod (11) and a lifting assembly (12) are hinged at the bottom of the screen (5), the lifting assembly (12) is used to periodically control the lifting of the elastic compression rod (11), a stud bolt (13) is provided on the elastic compression rod (11), the bottom of the screen (5) is engaged with the upper end of the stud bolt (13), and the conveyor belt (2 ) is provided with a cam structure (15) along the length direction of the surface, and the cam structure (15) is engaged with the lower end of the stud bolt (13); the elastic compression rod (11) is provided with an arc-shaped clamping member (18) on the side facing the conveyor belt (2), and the arc-shaped clamping member (18) abuts against the cam structure (15) to realize the periodic shaking of the screen (5); the bottom of the screen (5) is surrounded by an outer gear ring (14), and the side wall of the cam structure (15) is provided with a rack (16), and the rack (16) is engaged with the lower end of the stud bolt (13); the width of the loading container (21) is adapted to the width of the partition channel.

2. The continuous conveying and feeding device for slag according to claim 1, characterized in that: A plurality of partition plates (19) are provided at the end of the conveyor belt (2), and a partition channel is formed between the plurality of partition plates (19). A fork plate (20) is provided on the guide plate (9), and the fork plate (20) guides the slag to the partition channels at different positions. The end of the partition plate (19) guides the external loading container (21). The scraper (7) is provided toward one side of the partition plate (19), and the upper end of the guide plate (9) is vertically aligned with any notch (6).

3. The continuous conveying and feeding device for slag according to claim 1, characterized in that: The length of the scraper (7) is equal to the radius of the screen (5), a positioning cross bar (22) is provided between the two elastic compression rods (11), and the stud bolt (13) is sleeved on the positioning cross bar (22).

4. The continuous conveying and feeding device for slag according to claim 1, characterized in that: The limiting collar (4) and the screen (5) are provided in plurality, the limiting collars (4) corresponding to the screen (5) and vertically connected via a bracket (23), the screens (5) are vertically fixedly connected via a central column (24), and the screening plate (8) is provided on one side facing the notch (6).

5. The continuous conveying and feeding device for slag according to claim 4, characterized in that: The plurality of screens (5) include a top screen (501), a middle screen (502) and a bottom screen (503), and the mesh sizes of the top screen (501), the middle screen (502) and the bottom screen (503) decrease in sequence.

6. The continuous conveying and feeding device for slag according to claim 5, characterized in that: The top screen (501), the middle screen (502) and the bottom screen (503) are at the same level as the bottom surfaces of the corresponding limiting collars (4).

7. The continuous conveying and feeding device for slag according to claim 5, characterized in that: The lifting assembly (12) is equipped with a telescopic rod for pushing the elastic compression rod (11) upward, and the movable length of the telescopic rod is the distance between the screen (5) and the bottom of the scraper (7).

8. The continuous conveying and feeding device for slag according to claim 5, characterized in that: A transmission and material guiding mechanism for guiding the top screen (5) is externally connected above the top screen (501).

9. The continuous conveying and feeding device for slag according to claim 1, characterized in that: The number of the cargo containers (21) corresponds to the number of the separation channels.

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