A clogging device for a feed cooling and classifying screen

Abstract

The application discloses a feed cooling grading screen blockage cleaning device and relates to the technical field of feed cooling grading screen blockage cleaning devices.The device comprises a screening cylinder, an arc-shaped cleaning frame, a pressing mechanism and a positioning mechanism.The application generates pulse airflow by the compression and release of the organ pressure pipe to spray and clean the screen holes, and only a small amount of air intake is needed to generate high-pressure blockage cleaning effect, which does not interfere with the normal cooling airflow circulation in the screening cylinder.The organ pressure pipe is accurately aligned with the screen holes every time for blockage cleaning by the clamping hole positioning mechanism, and the blockage cleaning effect is good.The arc-shaped cleaning frame is filled with cold air to cool the outer wall of the screening cylinder, the temperature difference between the blocked position and the unblocked position is used to accurately identify the blocked position, reliable basis is provided for the next round of accurate blockage cleaning, the blocked position can be automatically identified and accurately triggered for blockage cleaning operation, and compared with the widely used hard extrusion blockage cleaning mode of the spike roller, the organ pressure pipe can be adapted to the cleaning of screen holes of different sizes, and the application range is larger.

Description

Technical Field

[0001] This invention relates to the technical field of feed cooling and grading screen unclogging devices, and in particular to a feed cooling and grading screen unclogging device. Background Technology

[0002] In the prior art, such as CN121589024A, a feed cooling and grading screen is provided, which includes setting multiple partitions for temperature insulation to improve the cooling effect and setting adjustable screen holes. However, the temperature and humidity of freshly granulated feed are high, which makes it easy to stick to the screen holes, causing the screen holes to be blocked, which seriously affects the screening efficiency and cooling effect. Summary of the Invention

[0003] Therefore, it is necessary to provide a device for clearing blockages in a feed cooling and grading screen to address the technical problem of screen hole blockage affecting the cooling and screening effect.

[0004] To achieve the above objectives, the present invention provides a feed cooling and grading screen unclogging device, comprising: Screening cylinder; An arc-shaped cleaning frame is installed on the outer side of the screening cylinder. Inside the arc-shaped cleaning frame, a sliding sealing clip is engaged with an abutment frame, which is slidably and sealingly connected to the outer wall of the screening cylinder. The pressing mechanism includes a pressing frame that slides and engages within the arc-shaped cleaning frame. The pressing frame is linked to a locking piece that slides and engages on a receiving frame. A bellows pressure tube is installed on the locking piece. The pressing frame presses the bellows pressure tube to compress it. After pressing, the pressing frame engages below the locking piece to keep the bellows pressure tube in a compressed state. Then, the receiving frame separates from the locking piece and resets. The locking piece descends to release the bellows pressure tube, allowing the bellows pressure tube to reset and replenish air. The positioning mechanism is used to position the abutment frame so that it can drive the bellows pressure tube to rotate along with the outer wall of the screening cylinder, so that the bellows pressure tube aligns with the screen holes on the screening cylinder.

[0005] The arc-shaped cleaning frame is positioned on the outer side of the screening cylinder, forming a sealed working chamber with the outer wall of the screening cylinder. The sliding sealing frame is engaged within the arc-shaped cleaning frame, ensuring a smooth, airtight connection with the outer wall of the screening cylinder. The arc-shaped cleaning frame only covers a portion of the circumference of the outer wall of the screening cylinder, allowing the screen holes on the cylinder to pass through the cleaning area sequentially as the cylinder rotates. The pressing frame is slidably engaged within the arc-shaped cleaning frame and can slide along the guide direction. The clamping element is slidably engaged within the abutment frame, and the bellows pressure pipe is fixedly installed on the clamping element, with its opening facing the outer wall of the screening cylinder. During operation, the pressing frame descends to apply pressure to the clamp, driving the clamp and its bellows pressure pipe to move towards the outer wall of the screening cylinder for pressing and compression. After pressing into place, the pressing frame engages below the clamp, maintaining the compressed state. Subsequently, the clamp can be pulled back to its original position, causing the abutment frame to displace and separate from the clamp, creating a gap between them. The clamp can then descend under gravity, releasing the bellows pressure pipe. Since the bellows pressure pipe is connected to the pressing frame, it can be stretched back to replenish air. The positioning mechanism ensures that the abutment frame can rotate with the screening cylinder, aligning the bellows pressure pipe with the screen holes on the screening cylinder one by one, ensuring precise unblocking.

[0006] Optionally, the rear end of the arc-shaped cleaning frame is equipped with several temperature sensors, and the temperature sensors are set one-to-one with each row of screen holes on the screening cylinder; the arc-shaped cleaning frame is filled with low-temperature air, and the screen holes that pass through are cooled down. If the screen holes are blocked, no high-temperature gas will be discharged and the cooling will be obvious. If the screen holes are not blocked, high-temperature gas will be discharged and the cooling will be smaller. The location of the screen hole blockage can be determined by the temperature difference.

[0007] By adopting the above technical solution, during the cooling process of the high-temperature feed inside the screening cylinder, cold air penetrates the material layer and screen holes from the annular cavity, and fine powder material is discharged from the outside of the screen holes. High-temperature gas is discharged from unblocked screen holes, resulting in a higher temperature; blocked screen holes do not discharge high-temperature gas and are continuously cooled by the cold chamber, resulting in a lower temperature. By detecting the temperature difference at each row of screen holes using temperature sensors, it is possible to accurately determine which screen holes are blocked.

[0008] Optionally, the front end of the screening cylinder in the direction of rotation is provided with a scraper and a brush inside the arc-shaped cleaning frame for cleaning the material adhering to the outer wall of the screening cylinder; the air pressure inside the arc-shaped cleaning frame is higher than that outside, and the scraped material debris is sent back into the screening cylinder through negative pressure reflux.

[0009] By adopting the above technical solution, automatic recovery of scraped material is achieved, reducing waste. The scraper and brush design ensures that the outer wall of the screening cylinder is cleaned before entering the unclogging area, which is beneficial for subsequent temperature detection and sealing of the bellows pressure pipe.

[0010] Optionally, the pressing mechanism further includes an arc-shaped frame that is slidably engaged with the arc-shaped cleaning frame, and a linear actuator is installed on the arc-shaped frame. The linear actuator is used to drive the pressing frame to move up and down. The linear actuator is one of an electric push rod, a pneumatic cylinder, or a hydraulic cylinder.

[0011] By adopting the above technical solution and selecting according to the actual working conditions, the linear actuator controls its action sequence through the controller to ensure that the pressing frame is driven to perform the pressing operation when the screening cylinder rotates to the appropriate position.

[0012] Optionally, an L-shaped locking block is fixedly installed on the locking component. The L-shaped locking block has a locking groove, and a movable block is slidably installed in the locking groove. An elastic element is installed between the movable block and the locking groove. The elastic element always applies an outward popping force to the movable block. When the pressing frame descends to press the accordion pressure tube, the bottom of the pressing frame squeezes the movable block to retract it into the locking groove. After the pressing frame moves below the L-shaped locking block, the movable block pops out under the action of the elastic element, so that the pressing frame is locked below the movable block.

[0013] By adopting the above technical solution, when the pressing frame descends to press the bellows pressure tube, the bottom of the pressing frame first contacts and presses against the movable block, causing the movable block to retract into the slot against the elastic force of the elastic element. After the pressing frame continues to descend to below the L-shaped locking block, the movable block pops out again under the action of the elastic element, causing the pressing frame to lock under the movable block. This structure achieves the maintenance of the compressed state of the bellows pressure tube by the pressing frame, preventing the bellows pressure tube from prematurely releasing while in a compressed state.

[0014] Optionally, a fixed shaft is slidably mounted on the arc-shaped cleaning frame, and a slot corresponding to the fixed shaft is opened on the pressing frame, with the fixed shaft slidingly passing through the slot. When the bellows pressure tube rises and resets, the fixed shaft can press the chamfer on the upper surface of the movable block, pressing the movable block back into the slot. The diameter of the slot is larger than the diameter of the fixed shaft so that the pressing frame is not interfered with when the fixed shaft passes through.

[0015] By adopting the above technical solution, when the accordion pressure tube needs to be released after pressing, the fixed shaft moves with the arc-shaped cleaning frame to the position of the movable block, pressing the chamfer on the upper surface of the movable block and pushing the movable block back into the slot, releasing the locking between the locking piece and the pressing frame. Under the action of gravity, the locking piece descends along the abutment frame, causing the accordion pressure tube to extend and reset. The diameter of the slot is larger than the diameter of the fixed shaft, ensuring that the fixed shaft has sufficient room to move within the slot and will not interfere with the normal movement of the pressing frame.

[0016] Optionally, the positioning mechanism includes a locking shaft that slides onto the abutment frame, and a plurality of spaced locking holes on the screening cylinder, with the locking shaft corresponding to and engaging with the locking holes; a ball bearing is installed at the bottom of the locking shaft that contacts the outer wall of the screening cylinder, and a roller is rotatably mounted on the top side of the locking shaft; a guide rail is fixedly installed on the inner wall of the arc-shaped cleaning frame, and the guide rail engages with the roller; when the roller rolls along the guide rail, it lifts the locking shaft so that it disengages from the locking holes; an elastic element two is fixedly mounted on the abutment frame and fitted onto the locking shaft.

[0017] By adopting the above technical solution, during operation, the screening cylinder rotates past the arc-shaped cleaning frame, and the retaining shaft automatically falls into the retaining hole under the action of the elastic element two, achieving synchronous positioning. The abutment frame drives the bellows pressure tube to rotate with the screening cylinder. Subsequently, the guide rail lifts the retaining shaft out of the retaining hole through rollers, completing one positioning cycle. The elastic element two is fixedly installed on the abutment frame, always applying a downward force to the retaining shaft, ensuring that the retaining shaft can be stably inserted into the retaining hole even when tilted.

[0018] Optionally, a reset elastic element is installed between the abutment frame and the arc-shaped cleaning frame. When the locking shaft disengages from the locking hole, the reset elastic element pulls the abutment frame and its internal bellows pressure tube, pressing frame, and locking parts to reset.

[0019] By adopting the above technical solution, the elastic force of the reset elastic element is reasonably selected according to the total weight of the abutment frame and its internal components. This ensures reliable reset without affecting the positioning effect of the locking shaft and maintains a long service life, thus facilitating reset.

[0020] Optionally, a baffle is inserted into the arc-shaped cleaning frame. When the screening cylinder rotates at high speed, the baffle is located below the clamping shaft, preventing the clamping shaft from inserting into the clamping hole. When the screening cylinder rotates slowly for cleaning, the baffle moves out, and the clamping shaft can fall normally into the clamping hole.

[0021] By adopting the above technical solution, the baffle can be set as needed, and can be inserted manually or by pushing it in with a separate electric cylinder.

[0022] Optionally, the controller is connected to the temperature sensor and the linear actuator. The controller determines whether the screen holes are blocked based on the detection data of the temperature sensor. When it is determined to be blocked, the controller controls the linear actuator to drive the pressing frame to press and clean the bellows pressure tube when the next row of screen holes passes by.

[0023] The specific workflow of the above technical solution is as follows: The screening cylinder rotates slowly, and each row of screen holes passes through the arc-shaped cleaning frame in sequence. Temperature sensors monitor the temperature of each screen hole in each row in real time. The controller compares the temperature data of each row of screen holes, and screen holes with significantly lower temperatures are identified as blocked. When a blocked screen hole passes through the arc-shaped cleaning frame again in the next rotation, the controller triggers a linear actuator to drive the pressing frame to press down, completing the precise unblocking of that row of screen holes.

[0024] This technical solution has at least the following beneficial effects: 1. The pulsed airflow generated by the compression and release of the bellows pressure pipe is used to blow and clean the screen holes. Only a small amount of air intake is needed to produce a high-pressure unblocking effect. It will not interfere with the normal cooling airflow in the screening cylinder, will not affect the cooling effect, and has low energy consumption. 2. The clamping and positioning mechanism ensures that the bellows pressure tube is accurately aligned with the screen hole every time it is cleared, preventing air leakage when the screen hole is located at the edge of the abutment frame, resulting in a good clearing effect; 3. The outer wall of the screening cylinder is cooled by filling the arc-shaped cleaning frame with cold air. The temperature difference between the blocked and unblocked areas is used to accurately identify the location of the blockage, providing a reliable basis for the next round of precise blockage removal. 4. The scraper and brush clean the material adhering to the outer wall of the screening cylinder. With the help of the air pressure in the arc-shaped cleaning frame, the material debris is sent back to the screening cylinder through negative pressure, realizing automatic cleaning and material recovery. 5. By setting the baffle, it is possible to switch between high-speed cooling mode and slow unblocking mode without affecting the normal cooling operation, and unblocking operation can be performed as needed; 6. By working with a temperature sensor and controller, the system can automatically identify the location of blockages and accurately trigger the clearing operation, achieving fully automated clearing management and reducing the cost of manual intervention. 7. Compared to the more widely used hard extrusion cleaning method such as the spiked roller, the bellows pressure tube can be adapted to cleaning screens of different sizes and has a wider range of applications. Attached Figure Description

[0025] Figure 1 This is a partial perspective view of an embodiment of the present invention; Figure 2 This is a partial exploded view of an embodiment of the present invention; Figure 3 This is a front sectional view of an embodiment of the present invention; Figure 4 This is a perspective view of an embodiment of the present invention; In the diagram, 1. Screening cylinder; 20. Arc-shaped cleaning frame; 21. Abutment frame; 22. Pressing frame; 23. Clamping device; 24. Bellows pressure tube; 25. Temperature sensor; 27. Scraper; 28. Brush; 29. ​​Arc-shaped frame; 291. Linear actuator; 30. L-shaped clamping block; 31. Slot; 32. Movable block; 34. Fixed shaft; 35. Slot; 36. Clamping shaft; 37. Clamping hole; 38. Ball bearing; 39. Roller; 40. Guide rail; 41. Elastic element two; 42. Reset elastic element; 43. Baffle plate. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Please see Figures 1 to 4 This application provides a feed cooling and grading screen unclogging device, comprising: Screening cylinder 1 is fixedly installed on the ground; The arc-shaped cleaning frame 20 is fixedly installed on the ground and set on the outer side of the outer wall of the screening cylinder 1. The arc-shaped cleaning frame 20 is slidably and sealingly connected to the abutment frame 21, and the abutment frame 21 is slidably and sealingly connected to the outer wall of the screening cylinder 1. The pressing mechanism includes a pressing frame 22 that slides and engages within the arc-shaped cleaning frame 20. The pressing frame 22 is linked with a locking piece 23 that slides and engages on the abutment frame 21. A bellows pressure tube 24 is mounted on the locking piece 23. The pressing frame 22 presses down on the bellows pressure tube 24 to compress it. After pressing, the pressing frame 22 engages below the locking piece 23 to keep the bellows pressure tube 24 in a compressed state. Then, the abutment frame 21 separates from the locking piece 23 and resets. The locking piece 23 descends to release the bellows pressure tube 24, allowing the bellows pressure tube 24 to reset and replenish air. The pressing frame can limit both ends of the arc-shaped sliding direction of the abutment frame 21 so that the abutment frame 21 can stably drive the pressing frame 22 to slide together. The positioning mechanism is used to position the abutment frame 21 so that it drives the bellows pressure tube 24 to rotate along the outer wall of the screening cylinder 1, so that the bellows pressure tube 24 corresponds to the screen hole on the screening cylinder 1.

[0028] An arc-shaped cleaning frame 20 is positioned on the outer side of the screening cylinder 1, forming a sealed working chamber with the outer wall of the screening cylinder 1. A sliding sealing frame 21 is engaged within the arc-shaped cleaning frame 20, providing a sliding seal connection with the outer wall of the screening cylinder 1 to ensure the airtightness of the working chamber. The arc-shaped cleaning frame 20 only covers a portion of the circumference of the outer wall of the screening cylinder 1, allowing the screen holes on the screening cylinder 1 to pass through the cleaning area sequentially as it rotates. A pressing frame 22 is slidably engaged within the arc-shaped cleaning frame 20 and can slide along the guide direction. A clamp 23 is slidably engaged within the clamp 21. A bellows pressure pipe 24 is fixedly installed on the clamp 23, with its opening facing the outer wall of the screening cylinder 1. During operation, the pressing frame 22 descends to apply pressure to the clamping piece 23, driving the clamping piece 23 and its bellows pressure pipe 24 towards the outer wall of the screening cylinder 1 for pressing and compression. After pressing to the desired position, the pressing frame 22 engages below the clamping piece 23, maintaining the compressed state. Subsequently, the clamping piece 23 can be pulled back to its original position, causing the abutment frame 21 to displace and separate from the clamping piece 23, creating a gap between them. The clamping piece 23 can then descend under gravity, releasing the bellows pressure pipe 24. Since the bellows pressure pipe 24 is connected to the pressing frame, it can be extended and reset to replenish air. The positioning mechanism ensures that the abutment frame 21 can rotate with the screening cylinder 1, ensuring that the bellows pressure pipe 24 aligns one-to-one with the screen holes on the screening cylinder 1, guaranteeing accurate unblocking. Both the clamping piece 23 and the abutment frame 21 have a larger height on both sides and a smaller height in the middle, so that when the clamping piece 23 rises to intake air, it can still engage within the abutment frame 21.

[0029] In one embodiment, the temperature detection structure is as follows: a number of temperature sensors 25 are fixedly installed at the rear end of the arc-shaped cleaning frame 20. The temperature sensors 25 are set one-to-one with each row of screen holes on the screening cylinder 1. The arc-shaped cleaning frame 20 is filled with low-temperature air. The screen holes that pass through are cooled down. If the screen holes are blocked, no high-temperature gas will be discharged and the cooling will be obvious. If the screen holes are not blocked, high-temperature gas will be discharged and the cooling will be small. The location of the screen hole blockage is determined by the temperature difference.

[0030] By adopting the above technical solution, during the cooling process of the high-temperature feed inside the screening cylinder 1, cold air penetrates the material layer and screen holes from the annular cavity, and fine powder material is discharged from the outside of the screen holes. High-temperature gas is discharged from unblocked screen holes, resulting in a higher temperature; blocked screen holes do not discharge high-temperature gas and are continuously cooled by the cold chamber, resulting in a lower temperature. By detecting the temperature difference at each row of screen holes using temperature sensor 25, it is possible to accurately determine which screen holes are blocked.

[0031] In one embodiment, the cleaning structure is as follows: a scraper 27 and a brush 28 are fixedly installed at the front end of the screening cylinder 1 in the direction of rotation within an arc-shaped cleaning frame 20, for cleaning materials adhering to the outer wall of the screening cylinder 1; the air pressure inside the arc-shaped cleaning frame 20 is slightly higher than that outside, and the scraped material debris is returned to the screening cylinder 1 through negative pressure reflux. The scraper 27 is used to scrape off large pieces of material adhering to the outer wall of the screening cylinder 1, and the brush 28 further cleans residual fine powder and dust.

[0032] By adopting the above technical solution, the scraped material is automatically recycled, reducing waste. The scraper 27 and brush 28 ensure that the outer wall of the screening cylinder 1 is cleaned before entering the unblocking area, which is beneficial for subsequent temperature detection and sealing of the bellows pressure pipe 24.

[0033] In one embodiment, the pressing drive structure is as follows: the pressing mechanism further includes an arc-shaped frame 29 that is slidably engaged with the arc-shaped cleaning frame 20, and a linear actuator 291 is fixedly installed on the arc-shaped frame 29. The linear actuator 291 is used to drive the pressing frame 22 to move up and down. The linear actuator 291 can be one of an electric push rod, a cylinder or a hydraulic cylinder.

[0034] By adopting the above technical solution and selecting according to the actual working conditions, the linear actuator 291 controls its action sequence through the controller to ensure that the pressing frame 22 is driven to perform the pressing operation when the screening cylinder 1 rotates to the appropriate position.

[0035] In one embodiment, the locking structure is as follows: an L-shaped locking block 30 is fixedly installed on the locking member 23, a locking groove 31 is provided on the L-shaped locking block 30, a movable block 32 is slidably installed in the locking groove 31, and an elastic element is fixedly installed between the movable block 32 and the locking groove 31. The elastic element always applies an outward popping force to the movable block 32. When the pressing frame 22 descends to press the accordion pressure tube 24, the bottom of the pressing frame 22 squeezes the movable block 32 to retract it into the locking groove 31. After the pressing frame 22 moves below the L-shaped locking block 30, the movable block 32 pops out under the action of the elastic element, so that the pressing frame 22 is locked below the movable block 32.

[0036] By adopting the above technical solution, when the pressing frame 22 descends to press the bellows pressure tube 24, the bottom of the pressing frame 22 first contacts and presses against the movable block 32, causing the movable block 32 to retract into the slot 31 against the elastic force of the elastic element. After the pressing frame 22 continues to descend below the L-shaped locking block 30, the movable block 32 pops out again under the action of the elastic element, so that the pressing frame 22 is locked below the movable block 32. This structure achieves the maintenance of the compressed state of the bellows pressure tube 24 by the pressing frame 22, preventing the bellows pressure tube 24 from being prematurely released in the compressed state.

[0037] In one embodiment, the unlocking structure is as follows: a fixed shaft 34 is slidably mounted on the arc-shaped cleaning frame 20, and a slot 35 corresponding to the fixed shaft 34 is opened on the pressing frame 22. The fixed shaft 34 slides through the slot 35. When the bellows pressure tube 24 rises and resets, the fixed shaft 34 can squeeze the chamfer on the upper surface of the movable block 32, pressing the movable block 32 back into the slot 31. The diameter of the slot 35 is larger than the diameter of the fixed shaft 34 so that the pressing frame 22 is not interfered with when the fixed shaft 34 passes through.

[0038] By adopting the above technical solution, when the accordion pressure tube 24 needs to be released after pressing, the fixed shaft 34 moves with the arc-shaped cleaning frame 20 to the position of the movable block 32, pressing the chamfer on the upper surface of the movable block 32 and pushing the movable block 32 back into the slot 31, releasing the locking of the locking piece 23 and the pressing frame 22. Under the action of gravity, the locking piece 23 descends along the abutment frame 21, causing the accordion pressure tube 24 to extend and reset. The diameter of the slot 35 is larger than the diameter of the fixed shaft 34, ensuring that the fixed shaft 34 has a certain amount of room to move within the slot 35 and will not interfere with the normal movement of the pressing frame 22.

[0039] In one embodiment, the positioning mechanism includes a locking shaft 36 that slides onto the abutment frame 21. The screening cylinder 1 has several spaced-apart locking holes 37, with the locking shaft 36 corresponding to and engaging with the locking holes 37. A ball bearing 38 is rotatably mounted at the bottom of the locking shaft 36, contacting the outer wall of the screening cylinder 1 to reduce friction between the bottom of the locking shaft 36 and the outer wall of the screening cylinder 1. A roller 39 is rotatably mounted on the top side of the locking shaft 36. A guide rail 40 is fixedly mounted on the inner wall of the arc-shaped cleaning frame 20. The guide rail 40 engages with the roller 39; when the roller 39 rolls along the guide rail 40, it lifts the locking shaft 36, disengaging it from the locking holes 37. An elastic element 41 is sleeved on the locking shaft 36.

[0040] By adopting the above technical solution, during operation, the screening cylinder 1 rotates past the arc-shaped cleaning frame 20, and the retaining shaft 36 automatically falls into the retaining hole 37 under the action of the elastic element 41, achieving synchronous positioning. The abutment frame 21 drives the bellows pressure tube 24 to rotate with the screening cylinder 1. Subsequently, the guide rail 40 lifts the retaining shaft 36 out of the retaining hole 37 through the roller 39, completing one positioning cycle. The elastic element 41 is fixedly installed on the abutment frame 21, always applying a downward force to the retaining shaft 36, ensuring that the retaining shaft 36 can be stably inserted into the retaining hole 37 even when tilted.

[0041] In one embodiment, the reset structure is as follows: a reset elastic element 42 is installed between the abutment frame 21 and the arc-shaped cleaning frame 20. When the locking shaft 36 disengages from the locking hole 37, the reset elastic element 42 pulls the abutment frame 21 and its internal bellows pressure tube 24, pressing frame 22, and locking element 23 back to the initial position.

[0042] By adopting the above technical solution, the elastic force of the reset elastic element 42 is reasonably selected according to the total weight of the abutment frame 21 and its internal components. This ensures reliable reset, does not affect the positioning effect of the locking shaft 36, and maintains its long service life, thus facilitating reset.

[0043] In one embodiment, a baffle plate 43 is inserted into the arc-shaped cleaning frame 20. When the screening cylinder 1 rotates at high speed, the baffle plate 43 can be inserted into the position below the retaining shaft 36 to prevent the retaining shaft 36 from inserting into the retaining hole 37, so that the abutment frame 21 does not rotate with the screening cylinder 1 and does not perform cleaning. When the screening cylinder 1 rotates slowly to perform cleaning, the baffle plate 43 moves out, and the retaining shaft 36 can fall normally into the retaining hole 37 to realize the cleaning mode.

[0044] By adopting the above technical solution, the baffle 43 can be set as needed, and can be inserted manually or by pushing it in with an electric cylinder.

[0045] In one embodiment, a controller is also included. The controller is connected to the temperature sensor 25 and the linear actuator 291. The controller determines whether each row of screen holes is blocked based on the detection data of the temperature sensor 25. When it is determined to be blocked, the controller controls the linear actuator 291 to drive the pressing frame 22 to press and clean the bellows pressure tube 24 when the next row of screen holes passes by.

[0046] The specific workflow of the above technical solution is as follows: The screening cylinder 1 rotates slowly, and each row of screen holes passes through the arc-shaped cleaning frame 20 in sequence. The temperature sensor 25 detects the temperature of each screen hole in each row in real time. The controller compares the temperature data of each row of screen holes, and screen holes with significantly lower temperatures are determined to be blocked. When a blocked screen hole passes through the arc-shaped cleaning frame 20 again in the next rotation, the controller triggers the linear actuator 291 to drive the pressing frame 22 to press, completing the precise unblocking of that row of screen holes.

Claims

1. A device for clearing blockages in a feed cooling and grading screen, characterized in that, include: Screening cylinder (1); An arc-shaped cleaning frame (20) is set on the outer side of the outer wall of the screening cylinder (1). An abutment frame (21) is slidably and sealed inside the arc-shaped cleaning frame (20). The abutment frame (21) is slidably and sealed to the outer wall of the screening cylinder (1). The pressing mechanism includes a pressing frame (22) that slides and engages within the arc-shaped cleaning frame (20). The pressing frame (22) is linked with a locking piece (23) that slides and engages on the abutment frame (21). A bellows pressure tube (24) is installed on the locking piece (23). The pressing frame (22) presses the bellows pressure tube (24) to compress it. After pressing, the pressing frame (22) engages below the locking piece (23) to keep the bellows pressure tube (24) in a compressed state. Then, the abutment frame (21) separates from the locking piece (23) and resets. The locking piece (23) descends to release the bellows pressure tube (24) so ​​that the bellows pressure tube (24) resets and replenishes air. The positioning mechanism is used to position the abutment frame (21) so that it drives the bellows pressure tube (24) to rotate with the outer wall of the screening cylinder (1) so that the bellows pressure tube (24) corresponds to the screen hole on the screening cylinder (1).

2. The feed cooling and grading screen unclogging device according to claim 1, characterized in that, The arc-shaped cleaning frame (20) is equipped with several temperature sensors (25) at its rear end. The temperature sensors (25) are set one-to-one with each row of screen holes on the screening cylinder (1). The arc-shaped cleaning frame (20) is filled with low-temperature air. The screen holes that pass through are cooled down. If the screen holes are blocked, no high-temperature gas will be discharged and the temperature drop will be obvious. If the screen holes are not blocked, high-temperature gas will be discharged and the temperature drop will be small. The location of the screen hole blockage can be determined by the temperature difference.

3. The feed cooling and grading screen unclogging device according to claim 1, characterized in that, The front end of the sieve cylinder (1) in the direction of rotation is provided with a scraper (27) and a brush (28) in the arc-shaped cleaning frame (20) for cleaning the material adhering to the outer wall of the sieve cylinder (1); the air pressure inside the arc-shaped cleaning frame (20) is higher than that outside, and the scraped material debris is sent back to the sieve cylinder (1) through negative pressure return flow.

4. The feed cooling and grading screen unclogging device according to claim 1, characterized in that, The pressing mechanism also includes an arc frame (29) that is slidably attached to the arc cleaning frame (20). A linear actuator (291) is installed on the arc frame (29). The linear actuator (291) is used to drive the pressing frame (22) to move up and down. The linear actuator (291) is one of an electric push rod, a pneumatic cylinder or a hydraulic cylinder.

5. The feed cooling and grading screen unclogging device according to claim 4, characterized in that, An L-shaped locking block (30) is fixedly installed on the locking component (23). A slot (31) is provided on the L-shaped locking block (30). A movable block (32) is slidably installed in the slot (31). An elastic element is installed between the movable block (32) and the slot (31). The elastic element always applies an outward popping force to the movable block (32). When the pressing frame (22) lowers to press the accordion pressure tube (24), the bottom of the pressing frame (22) squeezes the movable block (32) to retract it into the slot (31). After the pressing frame (22) moves to below the L-shaped locking block (30), the movable block (32) pops out under the action of the elastic element, so that the pressing frame (22) is locked below the movable block (32).

6. The feed cooling and grading screen unclogging device according to claim 5, characterized in that, The arc-shaped cleaning frame (20) is slidably fitted with a fixed shaft (34), and the pressing frame (22) is provided with a slot (35) corresponding to the fixed shaft (34). The fixed shaft (34) slides through the slot (35). When the bellows pressure tube (24) rises and resets, the fixed shaft (34) can press the chamfer on the upper surface of the movable block (32) to press the movable block (32) back into the slot (31). The diameter of the slot (35) is larger than the diameter of the fixed shaft (34) so ​​that the pressing frame (22) is not interfered with when the fixed shaft (34) passes through.

7. The feed cooling and grading screen unclogging device according to claim 1, characterized in that, The positioning mechanism includes a locking shaft (36) that slides and engages with the abutment frame (21). The screening cylinder (1) is provided with a number of spaced locking holes (37), and the locking shaft (36) and the locking holes (37) are correspondingly engaged. The bottom of the locking shaft (36) is equipped with a ball bearing (38) that contacts the outer wall of the screening cylinder (1). A roller (39) is rotatably mounted on the top side of the locking shaft (36). A guide rail (40) is fixedly mounted on the inner wall of the arc-shaped cleaning frame (20). The guide rail (40) engages with the roller (39). When the roller (39) rolls along the guide rail (40), it lifts the locking shaft (36) so that it disengages from the locking holes (37). An elastic element (41) is fixedly mounted on the abutment frame (21) on the outer sleeve of the locking shaft (36).

8. The feed cooling and grading screen unclogging device according to claim 7, characterized in that: A reset elastic element (42) is installed between the abutment frame (21) and the arc-shaped cleaning frame (20). When the locking shaft (36) disengages from the locking hole (37), the reset elastic element (42) pulls the abutment frame (21) and its internal bellows pressure tube (24), pressing frame (22), and locking piece (23) to reset.

9. The feed cooling and grading screen unclogging device according to claim 7, characterized in that: A baffle plate (43) is inserted into the arc-shaped cleaning frame (20). When the screening cylinder (1) rotates at high speed, the baffle plate (43) is located below the retaining shaft (36) to prevent the retaining shaft (36) from inserting into the retaining hole (37). When the screening cylinder (1) rotates slowly for cleaning, the baffle plate (43) moves out and the retaining shaft (36) can fall normally into the retaining hole (37).

10. The feed cooling and grading screen unclogging device according to claim 2 or 4, characterized in that: It also includes a controller, which is connected to the temperature sensor (25) and the linear actuator (291). The controller determines whether the screen holes are blocked based on the detection data of the temperature sensor (25), and when it is determined to be blocked, it controls the linear actuator (291) to drive the pressing frame (22) to press and clean the bellows pressure tube (24) when the next row of screen holes passes by.

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