A slagging device for a boiler

Abstract

The utility model relates to a boiler deslagging technical field discloses a deslagging device of boiler, including the shell, two movable chains are equipped in the shell side by side, the outside of shell is provided with the chute that communicates with its inside, is provided with the crushing mechanism at chute, is provided with quick change mechanism between two chains, the quick change mechanism includes a plurality of settings between two chains's U type board, U type board is connected with chain through the connecting piece, and the plug -in piece is inserted in cooperation on U type board, and the plug -in piece is fixedly connected with U type board through locking assembly, and the plug -in piece is fixedly connected with the scraper on, the utility model discloses when the scraper needs to be replaced due to abrasion, and the connecting rod is pulled up to make the connecting column drive the bolt to move up, and the fixing of the plug -in piece is released, realizes the quick dismounting of the scraper, and the new plug -in piece is inserted into the inside of U type board, and the connecting rod is loosened, and the quick fixing of the scraper is completed, and the maintenance cost is reduced through quick assembly and disassembly, and the downtime is reduced.

Description

Technical Field

[0001] This utility model relates to the field of boiler slag removal technology, and in particular to a boiler slag removal device. Background Technology

[0002] A boiler is a core energy conversion device that converts the chemical energy of fuel into heat energy through combustion, and then transfers the heat energy to water or other heat transfer media inside the boiler drum, ultimately producing high-temperature steam, high-temperature hot water, or heat transfer oil. It is used in power generation, industrial production, and centralized heating to provide stable high-temperature heat energy output. During the fuel combustion process, boilers inevitably produce solid residues, namely ash, unburned carbon particles, and metal oxides from the fuel. Long-term accumulation of slag in the furnace, grate, or flue can clog the flow channels and reduce thermal efficiency. Therefore, it is necessary to regularly remove slag from the boiler to ensure its efficient, safe, and stable operation.

[0003] Early boiler slag removal devices consisted of a slag hopper, scrapers, roller chains, and an open discharge chute. The slag hopper collected slag falling from the grate, and the scrapers were directly bolted to the roller chains. The chains, driven by a small motor, moved along a straight track, pushing the slag into the open discharge chute. Due to the high wear intensity of the scrapers, they were prone to damage, requiring frequent shutdowns for maintenance. Furthermore, the connection between the scrapers and the chain relied on multiple sets of bolts for rigid fixation, necessitating the disassembly of each bolt during replacement, resulting in time-consuming changes that did not meet user needs. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a boiler slag removal device, which aims to improve the problem that in the prior art, the bolts need to be removed one by one when replacing the scraper, and the replacement time is long.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A boiler slag removal device includes an outer shell, two movable chains arranged side by side inside the outer shell, a chute communicating with the interior of the outer shell on the outside of the outer shell, a crushing mechanism at the chute, and a quick-change mechanism between the two chains. The quick-change mechanism includes multiple U-shaped plates disposed between two chains. The U-shaped plates are connected to the chains via connecting pieces. Inserts are inserted into the U-shaped plates and are fixedly connected to the U-shaped plates via locking components. A scraper is fixedly connected to the insert.

[0006] Furthermore: a crushing shell is fixedly connected to the top of the chute, and the crushing mechanism is located inside the crushing shell; The crushing mechanism includes a guide plate set on the top of the crushing shell, an active roller rotatably set on the inner wall of the crushing shell, a hydraulic motor that drives the active roller to rotate, and a driven roller set opposite to the active roller. A sliding plate is set on the driven roller, and a groove is opened on the crushing shell, with the sliding plate fitting in the groove.

[0007] Furthermore: a heat recovery mechanism is provided on the crushing shell, the heat recovery mechanism includes a slag hopper, the bottom of the slag hopper is fixedly connected to the top of the crushing shell, and a heat exchange shell is fixedly connected to its outer wall; The heat exchange shell is connected to an inlet pipe and an outlet pipe. The inner wall of the slag hopper is fixedly connected to multiple heat exchange tubes, with both ends of the heat exchange tubes penetrating the slag hopper and extending into the space formed between the slag hopper and the heat exchange shell.

[0008] Furthermore: the locking assembly includes a connecting rod, with connecting posts at both ends and a support post in the middle; the U-shaped plate has a fixing shell corresponding to the connecting post, the fixing shell penetrates the side wall of the U-shaped plate and communicates with the slot, a spring is provided inside the fixing shell, the lower end of the connecting post is inserted into the fixing shell and passes through the spring, and is connected to a pin, the corresponding insert has a receiving groove for easy pin insertion; a limit post is rotatably connected to the support post, and a limit shell is fixedly connected to the corresponding position of the support post on the U-shaped plate.

[0009] Furthermore: a pitch-changing assembly is provided on the front side of the crushing shell. The pitch-changing assembly includes a bracket fixedly connected to the sliding plate and a threaded rod rotatably mounted on the crushing shell. One end of the threaded rod passes through the bracket, and a positioning nut and a locking nut are respectively connected to the front and rear sides of the threaded rod.

[0010] Furthermore: a connecting plate is fixedly connected to the top of the slag hopper, and a sealing gasket is fixedly connected to the top of the connecting plate.

[0011] Furthermore: a motor is fixedly connected to the top of the housing, and a drive shaft is connected to the output end of the motor. The drive shaft is connected to the chain drive via a drive sprocket.

[0012] Furthermore, a steering sprocket for changing the trajectory of the chain is rotatably connected inside the outer casing, and the steering sprocket meshes with the chain.

[0013] Furthermore, a limiting groove is provided on the upper part of the broken shell, and the upper and lower ends of one side of the sliding plate are respectively slidably fitted in the corresponding limiting groove.

[0014] This utility model has the following beneficial effects: 1. In this utility model, when the scraper needs to be replaced due to wear, the limiting post is rotated to release the locking of the limiting shell to the limiting post. The connecting rod is pulled up to make the connecting post move the pin upward, releasing the fixation of the insert plate and realizing the quick disassembly of the scraper. The new insert plate is inserted into the inside of the U-shaped plate. The connecting rod is released, and the pin is reset by the spring. The limiting post is rotated in the opposite direction, and the connecting rod restricts the upward movement of the connecting post and the pin, thus completing the quick fixation of the scraper. The U-shaped plate bolts are fixed to the connecting plate, avoiding the need to replace the entire chain assembly due to local wear. The quick disassembly and assembly reduces maintenance costs and downtime.

[0015] 2. In this utility model, the cooled slag enters the crushing shell and is collected by the guide plate. The hydraulic motor drives the active roller to rotate, which works with the driven roller to crush the falling slag. This prevents large-sized slag from falling in and damaging the scraper and chain. By pushing the support, the sliding plate and the driven roller move with the sliding plate, changing the distance between the active roller and the driven roller to adapt to the crushing of slag of different coal types.

[0016] 3. In this utility model, after the high-temperature slag generated by boiler combustion is discharged from the furnace, it enters the slag hopper. Cooling water is injected into the interlayer formed by the outer wall of the slag hopper and the heat exchange shell through the water inlet pipe on the front side of the heat exchange shell. The two ends of the heat exchange tube penetrate the front and rear side walls of the slag hopper and form a continuous loop with the cooling water in the interlayer. During the process of the high-temperature slag falling in the slag hopper, it contacts the inner wall of the slag hopper to transfer heat. At the same time, the residual heat is transferred to the cooling water in the tube through the heat exchange tube, thereby improving the heat recovery effect. Attached Figure Description

[0017] Figure 1 A perspective view of a boiler slag removal device provided by this utility model; Figure 2 A front view of a boiler slag removal device provided by this utility model; Figure 3 A partial structural schematic diagram of a boiler slag removal device provided by this utility model; Figure 4 A cross-sectional view of a U-shaped plate structure for a boiler slag removal device provided by this utility model; Figure 5 A cross-sectional view of the crushing shell structure of a boiler slag removal device provided by this utility model; Figure 6 A cross-sectional view of the slag hopper structure of a boiler slag removal device provided by this utility model.

[0018] Legend: 1. Outer shell; 2. Support rod; 3. Chain; 4. Quick-change mechanism; 401. Connecting plate; 402. U-shaped plate; 403. Insert plate; 404. Scraper; 405. Fixed shell; 406. Spring; 407. Pin; 408. Locking assembly; 4081. Connecting column; 4082. Connecting rod; 4083. Limiting column; 4084. Limiting shell; 4085. Bolt; 5. Chute; 6. Crushing shell; 7. Crushing mechanism; 701. Guide plate; 702. Drive roller; 703. Hydraulic motor; 7 04. Sliding plate; 705. Slide groove; 706. Driven roller; 707. Pitch changer assembly; 7071. Bracket; 7072. Threaded rod; 7073. Positioning nut; 7074. Locking nut; 8. Heat recovery mechanism; 801. Slag hopper; 802. Heat exchange shell; 803. Water inlet pipe; 804. Water outlet pipe; 805. Heat exchange tube; 9. Connecting plate; 10. Sealing gasket; 11. Drive shaft; 12. Drive sprocket; 13. Motor; 14. Discharge shell; 15. Steering sprocket; 16. Limiting groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] Example 1: Refer to Figure 1 , Figure 3 and Figure 4 One embodiment of this utility model is a boiler slag removal device, which includes a shell 1, which serves as the supporting frame of the device, and the inner wall of the shell 1 is treated with anti-corrosion and wear-resistant materials.

[0021] The following explanation uses the movement of a chain within the outer casing along the left-right direction as an example. Support rods 2 are fixedly connected to the front and rear sides of the inner wall of the outer casing 1, providing sliding support for the two chains 3 and reducing direct friction between the chains 3 and the outer casing 1. The chains 3 drive the scraper 404 to move synchronously through cyclical motion, achieving continuous scraping and conveying of slag. A quick-change mechanism 4 is provided between the two chains 3. A chute 5 is connected to the top right side of the outer casing 1. A crushing shell 6 is fixedly connected to the top of the chute 5. A crushing mechanism 7 is installed inside the crushing shell 6, and a heat recovery mechanism 8 is installed on the top of the crushing shell 6.

[0022] The quick-change mechanism 4 includes multiple connecting pieces 401, which connect the chain 3 to the U-shaped plate 402. One side of each connecting piece 401 is fixedly connected to one side of the corresponding chain 3. Multiple U-shaped plates 402, corresponding to the positions of the connecting pieces 401, are arranged between two chains 3. Each U-shaped plate 402 has a U-shaped slot. The front and rear ends of the U-shaped plate 402 are fixedly connected to the other side of the corresponding connecting piece 401 by bolts 4085, ensuring operational stability and providing positioning support for the insert 403.

[0023] A plate 403 is slidably connected to the middle of the U-shaped plate 402. A scraper 404 is fixedly connected to one side of the plate 403. The opening of the U-shaped slot faces the scraper 404. The other side of the plate 403 is inserted into the slot of the U-shaped plate 402 and fixedly connected to the U-shaped plate 402 by the locking assembly 408. When the scraper 404 moves cyclically with the chain 3, the scraper 404 is in contact with the inner side of the outer casing 1 for scraping and conveying slag.

[0024] The locking assembly 408 includes a connecting rod 4082, with connecting posts 4081 fixed at both ends of the connecting rod 4082. A tubular fixing shell 405 is fixedly connected to the front and rear sides of the top of the U-shaped plate 402, penetrating the sidewalls of the U-shaped plate 402 and communicating with the slot. A spring 406 is provided inside the fixing shell 405, and the connecting post 4081 passes through the spring 406. A corresponding pin 407 is fixedly connected to the bottom end of the connecting post 4081. A receiving groove is provided on the top surface of the insert 403 at a position corresponding to the fixing shell 405 to receive the pin 407, transmitting the upward pulling force of the connecting rod 4082 to the pin 407, achieving synchronous movement between the pin 407 and the connecting rod 4082. A support post is provided in the middle of the connecting rod 4082, and a limit post 4083 is rotatably connected to the bottom of the support post. Limit shells 4084 are fixedly connected to the tops of multiple U-shaped plates 402 at positions corresponding to the support posts. Once the pin 407 is locked, the rotating limit post 4083 causes the arc-shaped protrusion to engage with the groove of the limit shell 4084, restricting the connecting rod 4082 from moving upward and preventing the pin 407 from accidentally moving upward due to vibration.

[0025] A motor 13 is fixedly connected to the top of the rear left side of the outer casing 1. Drive shafts 11 are rotatably connected to the left and right sides of the inner wall of the outer casing 1. When the motor 13 starts, it drives the drive shafts 11 to rotate, and then transmits torque to the chain 3 through the drive sprocket 12, causing the two drive shafts 11 to rotate synchronously, thus achieving the transmission effect. Specifically, drive sprockets 12 are fixedly connected to the front and rear sides of the outer walls of the two drive shafts 11, converting the rotational motion of the drive shafts 11 into the linear cyclic motion of the chain 3. A discharge shell 14 is connected to the top of the left end of the outer casing 1, serving as the outlet for slag.

[0026] Two steering sprockets 15 are rotatably connected to the middle of the front and rear sides of the inner wall of the outer casing 1. The steering sprockets 15 change the movement trajectory of the chain 3, and the bottom of the multiple steering sprockets 15 respectively meshes with the middle of the corresponding chain 3.

[0027] Specifically, during device operation, motor 13 causes drive shaft 11 to rotate. Drive shaft 11 is driven by drive sprocket 12 and chain 3, causing drive shafts 11 on both sides to rotate synchronously. As chain 3 moves, scraper 404 slides against the inner side of outer shell 1, pushing slag from the position where it falls from chute 5 towards discharge shell 14. Steering sprocket 15 changes the direction of chain 3 and, in conjunction with the bending structure of outer shell 1, realizes the conveying of slag to a higher position. When the scraper 404 needs to be replaced due to wear, rotate the limiting post 4083 so that the protrusion at the bottom of the limiting post 4083 aligns with the groove at the top of the limiting shell 4084, thereby releasing the locking of the limiting shell 4084 to the limiting post 4083. Pull up the connecting rod 4082, which will cause the connecting post 4081 to move the pin 407 upward. At this time, the spring 406 is compressed, and the pin 407 exits the receiving groove of the insert 403 and retracts into the fixed shell 405, releasing the fixation of the insert 403. The old scraper 404 and the insert 403 can be directly pulled out from the U-shaped plate 402 for quick disassembly. When replacing the new scraper 404, insert the new insert 403 into the inside of the U-shaped plate 402, and then release the connecting rod 4082. 7. Under the restoring force of spring 406, insert the new insert 403 into the receiving groove. Then, rotate the limiting post 4083 in the opposite direction to make it snap into the limiting shell 4084. The connecting rod 4082 restricts the upward movement of the connecting post 4081 and the pin 407 to achieve locking and complete the quick fixing of the scraper 404. When the U-shaped plate 402 is worn, unscrew the bolt 4085 connecting the U-shaped plate 402 and the connecting piece 401, slide the old U-shaped plate 402 along the connecting piece 401 to remove it. After the new U-shaped plate 402 is inserted along the connecting piece 401, tighten the bolt 4085 again to complete the replacement. By replacing the scraper 404 and the U-shaped plate 402 independently, the problem of having to replace the entire chain 3 assembly due to local wear is avoided, reducing maintenance costs and downtime.

[0028] Example 2: Refer to Figure 2 and Figure 5The crushing mechanism 7 includes a guide plate 701, which is inclined to guide the slag towards the central crushing area between the drive roller 702 and the driven roller 706. The outer wall of the guide plate 701 is fixedly connected to the top of the inner wall of the crushing shell 6. The drive roller 702 is rotatably connected to the rear side of the inner wall of the crushing shell 6. The drive roller 702 rotates under the drive of a hydraulic motor 703, cooperating with the driven roller 706 to crush the slag. Specifically, a hydraulic motor 703 is fixedly connected to the rear side of the right end of the crushing shell 6. The output end of the hydraulic motor 703 passes through the right side of the crushing shell 6 and is fixedly connected to the right end of the drive roller 702, providing rotational power to the drive roller 702.

[0029] The front sides of both ends of the crushing shell 6 are provided with sliding grooves 705. Sliding plates 704 are respectively provided on the left and right sides of the outer wall of the driven roller 706. The sliding plates 704 are slidably connected to the inner walls of the corresponding sliding grooves 705, ensuring that the driven roller 706 moves only in the horizontal direction. The driven roller 706 cooperates with the driving roller 702, and the distance between the driving roller 702 and the driven roller 706 can be adjusted to adapt to the crushing requirements of slag materials with different hardness and block size.

[0030] A pitch-changing assembly 707 is provided on the front side of the crushing shell 6. The pitch-changing assembly 707 includes a bracket 7071, which drives the linear movement of the sliding plate 704. The left and right sides of the rear end of the bracket 7071 are fixedly connected to the front side of the corresponding sliding plate 704. A threaded rod 7072 is rotatably connected to the front side of the crushing shell 6. The front end of the threaded rod 7072 passes through the rear side of the bracket 7071, and a positioning nut 7073 is threadedly connected to the rear side of the outer wall of the threaded rod 7072. According to the required size of the slag, the positioning nut 7073 is rotated to the preset position of the threaded rod 7072. When the bracket 7071 moves to fit the positioning nut 7073, the target gap is reached. A locking nut 7074 is threadedly connected to the front side of the outer wall of the threaded rod 7072. After the gap is adjusted to the correct position, the locking nut 7074 is tightened to make the bracket 7071 fit tightly against the positioning nut 7073, achieving double nut locking.

[0031] Two limiting grooves 16 are provided on both the left and right sides of the broken shell 6. The limiting grooves 16 restrict the movement direction of the sliding plate 704, ensuring that the sliding plate 704 always remains parallel to the driving roller 702 when it drives the driven roller 706 to move horizontally. The upper and lower ends of the adjacent sides of the two sliding plates 704 are slidably connected to the inner wall of the corresponding limiting groove 16.

[0032] Specifically, after the boiler slag is discharged through the slag hopper 801, it enters the crushing shell 6. The guide plate 701, through its inclined angle, gathers the dispersed slag material towards the center, ensuring that the slag material can enter the crushing area of ​​the drive roller 702 and the driven roller 706. The hydraulic motor 703 drives the drive roller 702 to rotate. The drive roller 702 and the driven roller 706 crush the falling slag through the roller surface, thereby preventing large-sized slag material from falling in and damaging the scraper 404 and the chain 3. When it is necessary to adjust the distance between the drive roller 702 and the driven roller 706 to account for the differences in hardness and size of the slag produced by the combustion of different coal types, first loosen the locking nut 7074, rotate the positioning nut 7073, so that the positioning nut 7073 moves backward along the threaded rod 7072 to the preset position, push the bracket 7071 to drive the sliding plate 704 to slide backward along the limiting groove 16, and the driven roller 706 moves synchronously with the sliding plate 704, and the distance between the drive roller 702 and the driven roller 706 decreases accordingly. Conversely, the distance between the drive roller 702 and the driven roller 706 increases. After the adjustment is completed, tighten the locking nut 7074 so that the bracket 7071 and the positioning nut 7073 fit tightly together. Through the double nut locking structure, the position of the driven roller 706 is kept stable, and the distance is prevented from changing due to vibration during the crushing process.

[0033] Example 3: Refer to Figure 1 , Figure 2 and Figure 6 The heat recovery mechanism 8 includes a slag hopper 801, which receives high-temperature slag discharged from the boiler furnace. The bottom of the slag hopper 801 is fixedly connected to the top of the crushing shell 6. A heat exchange shell 802 is fixedly connected to the outer wall of the slag hopper 801. Cooling water in the interlayer between the heat exchange shell 802 and the slag hopper 801 is in direct contact with the outer wall of the slag hopper 801, absorbing the heat from the high-temperature slag transferred by the slag hopper 801. Specifically, a water inlet pipe 803 is connected to the front of the heat exchange shell 802, supplying ambient temperature cooling water to provide a cold source for heat recovery. A water outlet pipe 804 is connected to the rear of the heat exchange shell 802, outputting preheated cooling water to achieve heat recycling. Multiple heat exchange tubes 805 are fixedly connected to the inner wall of the slag hopper 801. The front and rear ends of the multiple heat exchange tubes 805 penetrate the front and rear sides of the inner wall of the slag hopper 801, respectively, and are in direct contact with the high-temperature slag, increasing the heat exchange area. A connecting plate 9 is fixedly connected to the top of the slag hopper 801. The connecting plate 9 is used to connect the boiler furnace and the slag hopper 801 to ensure that the high-temperature slag falls into the slag hopper 801. A sealing gasket 10 is fixedly connected to the top of the connecting plate 9 to prevent the high-temperature slag from leaking from the connection and to reduce the loss of heat from the high-temperature slag through the connection gap.

[0034] Specifically, after the high-temperature slag produced by boiler combustion is discharged from the furnace, it enters the slag hopper 801. External cooling water is injected into the interlayer formed between the outer wall of the slag hopper 801 and the heat exchange shell 802 through the inlet pipe 803 on the front side of the heat exchange shell 802, absorbing the heat transferred from the outer wall of the slag hopper 801. The heat exchange tubes 805 penetrate the front and rear side walls of the slag hopper 801 at both ends, forming a continuous loop with the cooling water in the interlayer. When the cooling water flows in the interlayer, it simultaneously enters the interior of each heat exchange tube 805. As the high-temperature slag falls into the slag hopper 801, it contacts the inner wall of the slag hopper 801 and transfers heat. At the same time, residual heat is transferred to the cooling water inside the tubes through the heat exchange tubes 805, improving the heat recovery effect. After heat exchange, the cooling water that has absorbed heat is discharged from the outlet pipe 804 on the rear side of the heat exchange shell 802, realizing the recycling and reuse of heat and preventing the high-temperature slag from directly dissipating heat into the air and causing waste.

[0035] Working principle: When the device is running, the motor 13 drives the transmission shaft 11 to rotate. The transmission shaft 11 drives the chain 3 through the meshing of the transmission sprocket 12, which drives the two parallel chains 3 to slide along the support rod 2. As the chains 3 move, the scraper 404 slides against the bottom of the inner side of the outer shell 1, pushing the slag from the drop position of the chute 5 towards the discharge shell 14. The steering sprocket 15 changes the direction of the chain 3 and, in conjunction with the bending structure of the outer shell 1, realizes the conveying of the slag to a higher position. When the scraper 404 needs to be replaced due to wear, rotate the limiting post 4083 so that the bottom protrusion of the limiting post 4083 is aligned with the top groove of the limiting shell 4084, thereby releasing the locking of the limiting shell 4084 on the limiting post 4083. Pull the connecting rod 4082 upward, and the connecting rod 4082 causes the connecting post 4081 to move the pin 407 upward. The spring 406 is compressed, and the pin 407 exits the receiving groove of the insert 403 and retracts into the fixing shell 405, thereby releasing the fixing of the insert 403. The old scraper 404 and the insert 403 can be directly pulled out from the U-shaped plate 402, achieving quick disassembly. When replacing the scraper 404, insert the new insert 403 into the inside of the U-shaped plate 402, then loosen the connecting rod 4082. Under the restoring force of the spring 406, the pin 407 is inserted into the receiving groove of the new insert 403. Then, rotate the limiting post 4083 in the opposite direction to make it lock into the limiting shell 4084. The connecting rod 4082 restricts the upward movement of the connecting post 4081 and the pin 407, thus completing the quick fixing of the scraper 404. When the U-shaped plate 402 is worn, the old U-shaped plate 402 can be removed by unscrewing the bolt 4085 connecting the U-shaped plate 402 and the connecting piece 401, sliding it along the connecting piece 401. After inserting the new U-shaped plate 402 along the connecting piece 401, tighten the bolt 4085 to complete the replacement.

[0036] Furthermore, after the high-temperature slag generated by boiler combustion is discharged from the furnace, it enters the slag hopper 801. Cooling water is injected into the interlayer formed by the outer wall of the slag hopper 801 and the heat exchange shell 802 through the water inlet pipe 803 on the front side of the heat exchange shell 802. The heat exchange tube 805 penetrates the front and rear side walls of the slag hopper 801 at both ends, forming a continuous loop with the cooling water in the interlayer. During the process of the high-temperature slag falling in the slag hopper 801, it contacts the inner wall of the slag hopper 801 and transfers heat. At the same time, the residual heat is transferred to the cooling water in the tube through the heat exchange tube 805, thereby improving the heat recovery effect.

[0037] After cooling, the slag enters the crushing shell 6. The guide plate 701 gathers the dispersed slag towards the center by tilting, ensuring that all slag can enter the crushing area of ​​the drive roller 702 and the driven roller 706. The hydraulic motor 703 drives the drive roller 702 to rotate. The drive roller 702 and the driven roller 706 crush the falling slag through the roller surface, preventing large-sized slag from falling in and damaging the scraper 404 and the chain 3. When it is necessary to adjust the distance between the active roller 702 and the driven roller 706 to accommodate the differences in hardness and size of slag produced by the combustion of different coal types, the locking nut 7074 is loosened first, and the positioning nut 7073 is rotated to move backward along the threaded rod 7072 to the preset position. This pushes the bracket 7071 to drive the sliding plate 704 to slide backward along the limiting groove 16. The driven roller 706 moves synchronously with the sliding plate 704, and the distance between the active roller 702 and the driven roller 706 decreases. Conversely, the distance between the active roller 702 and the driven roller 706 increases. After the adjustment is completed, the locking nut 7074 is tightened so that the bracket 7071 fits against the positioning nut 7073. The double-nut locking structure ensures the stability of the driven roller 706 position and avoids changes in the distance due to vibration during the crushing process.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A boiler slag removal device, comprising a shell (1), characterized in that: The outer shell (1) has two movable chains (3) arranged side by side. The outer side of the outer shell (1) is provided with a chute (5) that communicates with the interior. A crushing mechanism (7) is provided at the chute (5). A quick-change mechanism (4) is provided between the two chains (3). The quick-change mechanism (4) includes multiple U-shaped plates (402) disposed between two chains (3). The U-shaped plates (402) are connected to the chains (3) through connecting pieces (401). Insert pieces (403) are inserted into the U-shaped plates (402). The insert pieces (403) are fixedly connected to the U-shaped plates (402) through locking components (408). A scraper (404) is fixedly connected to the insert pieces (403).

2. The slag removal device for a boiler according to claim 1, characterized in that: The top of the chute (5) is fixedly connected to a crushing shell (6), and the crushing mechanism (7) is located inside the crushing shell (6); The crushing mechanism (7) includes a guide plate (701) disposed on the top of the crushing shell (6), an active roller (702) rotatably disposed on the inner wall of the crushing shell (6), a hydraulic motor (703) for driving the active roller (702) to rotate, and a driven roller (706) disposed opposite to the active roller (702). A sliding plate (704) is disposed on the driven roller (706), and a groove (705) is opened on the crushing shell (6). The sliding plate (704) is disposed in the groove (705).

3. The slag removal device for a boiler according to claim 2, characterized in that: The crushing shell (6) is provided with a heat recovery mechanism (8), which includes a slag hopper (801). The bottom of the slag hopper (801) is fixedly connected to the top of the crushing shell (6), and a heat exchange shell (802) is fixedly connected to its outer wall. The heat exchange shell (802) is connected to an inlet pipe (803) and an outlet pipe (804). The inner wall of the slag hopper (801) is fixedly connected to a plurality of heat exchange tubes (805). The two ends of the heat exchange tubes (805) pass through the slag hopper (801) and extend into the space formed between the slag hopper (801) and the heat exchange shell (802).

4. The slag removal device for a boiler according to claim 1, characterized in that: The locking assembly (408) includes a connecting rod (4082), with connecting posts (4081) at both ends of the connecting rod (4082) and a support post in the middle of the connecting rod (4082); the U-shaped plate (402) is provided with a fixing shell (405) corresponding to the connecting post (4081), the fixing shell (405) penetrates the side wall of the U-shaped plate (402) and communicates with the slot, the fixing shell (405) is provided with a spring (406), the lower end of the connecting post (4081) is inserted into the fixing shell (405) and passes through the spring (406), and is connected with a pin (407), the corresponding insert (403) is provided with a receiving groove to facilitate the insertion of the pin (407); the support post is rotatably connected with a limiting post (4083), and the U-shaped plate (402) is fixedly connected with a limiting shell (4084) at the corresponding position of the support post.

5. A boiler slag removal device according to claim 2, characterized in that: A pitch-changing assembly (707) is provided on the front side of the crushing shell (6). The pitch-changing assembly (707) includes a bracket (7071) fixedly connected to the sliding plate (704) and a threaded rod (7072) rotatably mounted on the crushing shell (6). One end of the threaded rod (7072) passes through the bracket (7071). The front and rear sides of the threaded rod (7072) are respectively connected to a positioning nut (7073) and a locking nut (7074).

6. The slag removal device for a boiler according to claim 3, characterized in that: A connecting plate (9) is fixedly connected to the top of the slag hopper (801), and a sealing gasket (10) is fixedly connected to the top of the connecting plate (9).

7. The slag removal device for a boiler according to claim 1, characterized in that: A motor (13) is fixedly connected to the top of the outer shell (1), and a drive shaft (11) is connected to the output end of the motor (13). The drive shaft (11) is connected to the chain (3) through a drive sprocket (12).

8. The slag removal device for a boiler according to claim 1, characterized in that: The outer casing (1) is rotatably connected to a steering sprocket (15) for changing the movement trajectory of the chain (3), and the steering sprocket (15) meshes with the chain (3).

9. A boiler slag removal device according to claim 2, characterized in that: The broken shell (6) has a limiting groove (16) on its upper side, and the upper and lower ends of the sliding plate (704) are respectively slidably fitted in the corresponding limiting groove (16).

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