Impact-resistant and heat-resistant roller shutter door for treating high-temperature ring-forming blocks of rotary kiln

Abstract

The utility model belongs to the technical field of pelletizing equipment, and particularly relates to an impact-resistant heat-resistant roller shutter door for treating high-temperature ring-forming blocks of a rotary kiln, which is characterized by comprising right-angled triangular angle plates and an electric roller shutter door, the right-angled triangular angle plates are respectively welded on the end surfaces of wall bodies on two sides of a ring-forming block transfer storehouse and are provided with slide ways, and the electric roller shutter door is arranged above the angle plates. The electric roller shutter door comprises a driving device, a heat-resisting roller shutter connected with the driving device, and a sealing baffle structure arranged below the heat-resisting roller shutter. According to the utility model, potential safety hazards generated during block discharging of the rotary kiln are eliminated, secondary dust raising is eliminated, and the on-site environment is improved.

Description

Technical Field

[0001] This utility model belongs to the field of pelletizing equipment technology, and in particular relates to an impact-resistant and heat-resistant roller shutter door for processing high-temperature ring-shaped blocks in rotary kilns. Background Technology

[0002] In the rotary kiln pellet production process, the rotary kiln is a superior device for roasting, heat transfer, and conveying pellets. After a period of operation, due to factors such as temperature control and changes in raw materials, a large number of ring-shaped lumps will form on the inner wall of the rotary kiln. These lumps will detach as the temperature changes and the pressure of the material increases. When the lumps move with the material to the fixed screen beam at the kiln head, the operator opens the kiln door and manually uses rakes, hooks, or other tools or mechanical means to remove the lumps from the kiln door. The lumps then slide down the chute and fall onto the ground on the next floor.

[0003] Because the rotary kiln head platform is high above the ground, and the angle between the block-discharging chute and the horizontal plane is approximately 40°, some agglomerated blocks with temperatures exceeding 1000 degrees Celsius can slide down the chute and roll nearly 10 meters due to inertia, posing a significant safety hazard. Furthermore, the agglomerated blocks carry away a large amount of ore pellets and dust upon landing. Currently, the practice in the field involves setting up a dust-collecting transfer warehouse for agglomerated blocks at the end of the rotary kiln head chute, as shown in the attached diagram. Figure 1 As shown, the warehouse is constructed of reinforced concrete. A dust collection system is installed at the top of the warehouse. The warehouse doors are double doors made of angle steel and thin steel plates. During the stacking of blocks, the doors are closed. The dust collection system creates negative pressure inside the transfer warehouse, drawing dust into a dust collector. After the hot, clumped blocks cool down, the doors are opened, and a loader enters to clean them. The problem with this type of steel double door is that when the clumped blocks land, the doors are subjected to the heat and impact of the blocks, causing significant plastic deformation. This results in the doors not closing properly, allowing the clumped blocks to roll out of the warehouse, posing a significant safety hazard. Furthermore, the deformation of the doors reduces the negative pressure inside the warehouse, leading to secondary dust re-entrainment and environmental pollution. Summary of the Invention

[0004] The purpose of this invention is to solve the safety hazards and secondary dust problems generated during the discharge of rotary kiln blocks by installing a roller shutter door with a certain angle and impact and heat resistance in the transfer warehouse of the ring block at the end of the rotary kiln head chute.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] The present invention relates to an impact-resistant and heat-resistant roller shutter door for processing high-temperature ring-shaped blocks in a rotary kiln. The roller shutter door comprises right-angled triangular corner plates with sliding tracks, welded to the end faces of the walls on both sides of the ring-shaped block transfer warehouse; an electric roller shutter door positioned above these corner plates; a drive unit; a heat-resistant roller shutter connected to the drive unit; and a sealing baffle structure positioned below the heat-resistant roller shutter.

[0007] The drive device includes a motor reducer, a main shaft connected to the output end of the motor reducer, a roller connected to the main shaft, and support bearings at both ends of the main shaft, with the bearing seats fixed to the wall.

[0008] The sealing baffle structure includes a baffle connected to the bottom of the heat-resistant roller shutter by several bolts and connecting plates, a reinforcing rib plate vertically welded to the center line of the baffle, a tie plate a welded between the reinforcing rib plate and the baffle, and two round shafts welded to both sides of the baffle, with a sealing bearing installed on each round shaft.

[0009] The corner plate is made of 30mm steel plate and vertically welded to the embedded part on the end face of the wall. The long right-angle side of the corner plate is perpendicular to the horizontal plane. The outer side of the connection between the corner plate and the embedded part is reinforced by welding with 20mm steel plate as tie plate b. The top angle of the corner plate is 20°.

[0010] A protective cover is provided on the wall above the roller.

[0011] The slide is a U-shaped slide, which is welded to the inclined side of the corner plate.

[0012] Advantages of this utility model:

[0013] This utility model relates to an impact-resistant and heat-resistant roller shutter door for handling high-temperature agglomerates in rotary kilns. It eliminates safety hazards during the discharge of agglomerates in rotary kilns, eliminates secondary dust generation, and improves the on-site environment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the installation position structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the specific structure of this utility model.

[0016] In the diagram: 1. Rotary kiln; 2. Kiln head; 3. Kiln door; 4. Block discharge chute; 5. Direction of block discharge; 6. Reinforced concrete enclosure; 7. Dust hood; 8. Dust suction pipe; 9. Dust flow direction; 10. Roller shutter door; 11. Base; 12. Roller shutter running direction; 13. Slide rail; 14. Protective cover; 15. Motor reducer; 16. Hand chain; 17. Main shaft; 18. Support bearing; 19. Roller; 20. Heat-resistant roller shutter; 21. Baffle; 22. Connecting plate; 23. Reinforcing rib plate; 24. Tie plate a; 25. Sealed bearing; 26. Angle plate; 27. Tie plate b. Detailed Implementation

[0017] The specific embodiments of this utility model are further described below with reference to the accompanying drawings.

[0018] like Figure 1 , 2 As shown, the impact-resistant and heat-resistant roller shutter door of this utility model for processing high-temperature ring-shaped blocks in a rotary kiln is characterized by comprising right-angled triangular corner plates 26 with slide rails 13 respectively welded to the end faces of the walls on both sides of the ring-shaped block transfer warehouse, an electric roller shutter door disposed above the corner plate 26, the electric roller shutter door comprising a drive device, a heat-resistant roller shutter 20 connected to the drive device, and a sealing baffle structure disposed below the heat-resistant roller shutter 20.

[0019] The drive device includes a motor reducer 15, a main shaft 17 connected to the output end of the motor reducer 15, a roller 19 connected to the main shaft 17, and support bearings 18 at both ends of the main shaft 17, with the bearing seats fixed to the wall.

[0020] The sealing baffle structure includes a baffle 21 connected to the lower part of the heat-resistant roller shutter 20 by several bolts and connecting plates 22, a reinforcing rib plate 23 vertically welded to the center line of the baffle 21, a tie plate a24 welded between the reinforcing rib plate 23 and the baffle 21, and two round shafts welded to both sides of the baffle 21, with a sealing bearing 25 installed on each round shaft.

[0021] The corner plate 26 is made of 30mm steel plate and is vertically welded to the embedded part on the end face of the wall. The long right-angle side of the corner plate 26 is perpendicular to the horizontal plane. The outer side of the connection between the corner plate and the embedded part is reinforced by welding with a 20mm steel plate as a tie plate b27. The apex angle of the corner plate 26 is 20°.

[0022] A protective cover 14 is provided on the wall above the roller 19.

[0023] The slide 13 is a U-shaped slide, which is welded to the inclined side of the corner plate 26.

[0024] As attached Figure 1As shown, a roller shutter door 10 is installed between two walls on one side of the transfer warehouse of the ring block at the end of the block chute 4 at the kiln head 2 of the rotary kiln 1. The slide 13 of the roller shutter door 10 has a certain angle with the vertical line. The slide 13 must ensure a certain rigidity. The roller shutter of the roller shutter door 10 is made of radiation-proof and heat-resistant material. The bottom end of the roller shutter is connected to a baffle 21. The baffle 21 is made of heat-resistant stainless steel plate of a certain thickness. The outer side of the baffle 21 is provided with reinforcing ribs 23 and tie plates a24 to improve the rigidity of the baffle 21. Two sealed bearings 25 are installed on each side of the baffle 21. The baffle 21 plays the role of preventing the ring block from rolling out of the warehouse. The roller shutter door 10 is operated via buttons or remote control (in case of electrical failure, the roller shutter door 10 can be opened and closed manually by pulling the chain 16). The motor reducer 15 drives the main shaft 17 and the roller 19 to reciprocate, thus opening and closing the roller shutter. After the roller shutter door 10 is closed, the baffle 21 is in close contact with the concrete floor. The heat-resistant roller shutter 20 with a certain angle prevents the heat-resistant roller shutter 20 from swinging due to airflow and reduces the load on the roller shutter door 10 during lifting. During block removal, the warehouse roller shutter door 10 is in the closed state, and the dust suction pipe sucks the dust into the dust collector. After the high-temperature clumped blocks in the warehouse cool down, the roller shutter door 10 is opened, and the loader enters the warehouse to clean up the clumped blocks.

[0025] In this embodiment, as shown in the appendix Figure 1 As shown, a right-angled triangular corner plate 26 is welded to the end face of the transfer warehouse on both sides of the ring block at the end of the block chute 4 at the kiln head 2 of the rotary kiln 1. The corner plate 26 is made of 30mm steel plate and is vertically welded to the embedded part on the end face of the wall. The long right-angle side of the corner plate 26 is perpendicular to the horizontal plane. The outer side of the connection between the corner plate 26 and the embedded part is reinforced by welding with a 20mm steel plate as a tie plate b27. The apex angle of the corner plate 26 is 20°. A roller shutter door 10 is installed above the apex angle of the corner plate 26. The roller shutter door 10 mainly includes a motor reducer 15, a base 11, a hand chain 16, a main shaft 17, a support bearing 18, a roller 19, a heat-resistant roller shutter 20, a baffle 21, a reinforcing rib 23, a tie plate a24, a sealed bearing 25, a slide 13, and a protective cover 14 (see appendix for details). Figure 2The base 11 of the motor reducer 15 is fixed to the warehouse wall. The motor reducer 15, main shaft 17, and roller 19 are horizontally arranged and concentric. The protective cover 14 is fixed to the wall above the roller 19. Support bearings 18 are installed at both ends of the main shaft 17, and the bearing seats are fixed to the wall. The U-shaped slide 13 of the roller shutter door 10 is welded to the inclined side of the corner plate 26. The two sides of the U-shaped slide 13 are 100mm long, and the external dimension of the slide 13 is 90mm. The slide 13 is made of 20mm steel plate by hot working to ensure a certain rigidity, that is, the internal width of the slide 13 is 50mm. The roller shutter of the roller shutter door 10 is made of radiation-proof and heat-resistant material. The thickness of the roller shutter is 10mm to ensure that it can withstand high temperatures of 1000℃-1200℃. The top of the heat-resistant roller shutter 20 is bolted to the roller 19, and the bottom is connected to the baffle 21 by several bolts and connecting plate 22. 2. The baffle 21 is uniformly welded to the upper edge of the baffle 21. The baffle 21 is made of heat-resistant stainless steel plate with a thickness of 30mm and a height of 500mm. The reinforcing rib 23 is also made of heat-resistant stainless steel plate with a thickness of 30mm and is vertically welded to the center line of the baffle 21. The reinforcing rib 23 is 200mm wide and 200mm shorter than the baffle 21. That is, the two ends of the reinforcing rib 23 are 100mm away from the two ends of the baffle 21. The reinforcing rib 23 and the baffle 21 are reinforced by welding with a 20mm steel plate as a tie plate a24. Two round shafts are welded to each side of the baffle 21. A sealing bearing 25 is installed on each round shaft. The outer diameter of the sealing bearing 25 is 40mm and the outer side of the sealing bearing 25 is flush with the surface of the baffle 21 to prevent the sealing bearing 25 from hitting the inner wall of the slide 13 when the ring block hits the baffle 21. A limiting ring is installed on each side of each sealing bearing 25.

[0026] The impact-resistant and heat-resistant roller shutter 10 of this utility model, used for handling high-temperature agglomerates in rotary kilns, eliminates safety hazards generated during the discharge of agglomerates in rotary kilns, eliminates secondary dust generation, and improves the on-site environment.

Claims

1. An impact-resistant and heat-resistant roller shutter door for handling high-temperature agglomerates in rotary kilns, characterized in that, It includes right-angled triangular corner plates with sliding tracks welded to the end faces of the two side walls of the transfer warehouse of the ring block, an electric roller shutter door set above the corner plates, the electric roller shutter door including a drive device, a heat-resistant roller shutter connected to the drive device, and a sealing baffle structure set below the heat-resistant roller shutter.

2. The impact-resistant and heat-resistant roller shutter door for treating high-temperature ring-shaped agglomerates in rotary kilns according to claim 1, characterized in that, The drive device includes a motor reducer, a main shaft connected to the output end of the motor reducer, a roller connected to the main shaft, and support bearings at both ends of the main shaft, with the bearing seats fixed to the wall.

3. The impact-resistant and heat-resistant roller shutter door for treating high-temperature ring-shaped agglomerates in rotary kilns according to claim 1, characterized in that, The sealing baffle structure includes a baffle connected to the bottom of the heat-resistant roller shutter by several bolts and connecting plates, a reinforcing rib plate vertically welded to the center line of the baffle, a tie plate a welded between the reinforcing rib plate and the baffle, and two round shafts welded to both sides of the baffle, with a sealing bearing installed on each round shaft.

4. The impact-resistant and heat-resistant roller shutter door for treating high-temperature ring-shaped agglomerates in rotary kilns according to claim 1, characterized in that, The corner plate is made of 30mm steel plate and vertically welded to the embedded part on the end face of the wall. The long right-angle side of the corner plate is perpendicular to the horizontal plane. The outer side of the connection between the corner plate and the embedded part is reinforced by welding with 20mm steel plate as tie plate b. The top angle of the corner plate is 20°.

5. The impact-resistant and heat-resistant roller shutter door for treating high-temperature ring-shaped agglomerates in rotary kilns according to claim 2, characterized in that, A protective cover is provided on the wall above the roller.

6. The impact-resistant and heat-resistant roller shutter door for treating high-temperature ring-shaped agglomerates in rotary kilns according to claim 1, characterized in that, The slide is a U-shaped slide, which is welded to the inclined side of the corner plate.

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