Ash conveying device

Abstract

The invention discloses an ash conveying device, and relates to the technical field of ash conveying, the ash conveying device comprises a base, a conveying table is fixed above the base, conveying rollers are symmetrically arranged in the conveying table, a conveying belt sleeves the two groups of conveying rollers, and a feeding groove is fixed on one side of the top end of the conveying table; dust escaping in the ash conveying process is sucked into the dust suction box through the dust suction holes through the dust suction box, and meanwhile, the sucked dust is filtered through the filtering and purifying mechanism, so that the dust overflowing into the air in the ash conveying process is effectively treated; upward elastic ejection force is provided for the scraping plate through the spring telescopic mechanism, the scraping plate abuts against the bottom face of the conveying belt, and therefore ash which is attached to the surface of the conveying belt and is not prone to falling can be scraped away, in addition, the weight of the ash collecting box is monitored in real time through a pressure sensor, and the conveying efficiency is improved. Therefore, the loading capacity of the ash in the ash collecting box is accurately controlled, and the situation of excessive loading or insufficient loading can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of ash conveying, and in particular to an ash conveying device. Background Art

[0002] Ash refers to the final product formed after the minerals in the fuel undergo physical and chemical changes after high temperature during the combustion process. Ash transportation refers to the process of transporting solid waste (i.e. ash) produced after combustion or chemical reaction from one location to another in the industrial production process. This process usually involves special equipment and technology to ensure the safe, efficient and environmentally friendly transfer of ash. In the existing technology, ash transportation is mostly achieved by conveyor belt transportation.

[0003] Most of the existing ash conveying devices have a single function and do not have a dust suction function, resulting in that the dust scattered into the air during the ash conveying process cannot be effectively treated, which is easy to pollute the environment. In addition, the ash located at the bottom layer during the conveying process is easy to adhere to the surface of the conveyor belt, resulting in the ash not being able to fall smoothly when it is conveyed to the collection box. In addition, after the ash is conveyed to the collection box, the ash loading amount in each collection box cannot be accurately controlled, which is inconvenient to use. Therefore, the present invention proposes an ash conveying device to solve the problems existing in the prior art. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to propose an ash conveying device, which solves the problem that the existing ash conveying device does not have a dust suction function, resulting in the dust scattered into the air during the ash conveying process cannot be effectively treated, and the ash is easily attached to the surface of the conveyor belt, resulting in the ash not being able to fall smoothly when it is conveyed to the collection box.

[0005] In order to achieve the purpose of the present invention, the present invention is implemented through the following technical scheme: an ash conveying device comprises a base, a conveying platform is fixed on the top of the base, conveying rollers are symmetrically arranged inside the conveying platform, and conveyor belts are sleeved on two groups of conveying rollers, a feeding trough is fixed on one side of the top of the conveying platform, a spiral feeding mechanism is arranged inside the feeding trough, a support plate which is driven and displaced by a first motor is slidably arranged on the side of the top of the base away from the feeding trough, a load-bearing plate is connected to both sides of the top of the support plate through a supporting spring, a pressure sensor electrically connected to the first motor is arranged below the load-bearing plate, an ash collecting box is placed on the top of the load-bearing plate, an L-shaped support plate is fixed on the side of the bottom of the conveying platform close to the ash collecting box, a scraper plate which contacts the conveyor belt is connected to the inner bottom end of the L-shaped support plate through a spring telescopic mechanism, a dust box is fixed on the top of the base, exhaust fans are fixed on both side walls of the dust box, a filtering and purification mechanism is arranged inside the dust box, a dust box is symmetrically fixed on the top of the conveying platform, the dust box and the dust box are connected through a dust pipe, and dust holes are equidistantly opened on the side of the dust box close to the conveyor belt.

[0006] Further improvement is that the spiral feeding mechanism includes a motor box fixed inside the feeding trough and a second motor fixed in the motor box, the output end of the second motor passes through the motor box through a bearing and is fixed with a spiral stirring shaft, and the lower part of the spiral stirring shaft extends to the discharge port at the bottom end of the feeding trough.

[0007] Further improvements are: support columns are symmetrically fixed between the base and the conveying platform, support rods are symmetrically fixed between the feeding trough and the conveying platform, and rubber retaining edges are fixed on both the front and rear sides of the outer surface of the conveying platform.

[0008] Further improvements are: the filtering and purification mechanism includes a filter screen fixed inside the dust box and a water pipe fixed at the top of the dust box, water for spraying is stored at the lower part of the dust box, the lower part of the two side walls of the dust box is connected to a water pump, the output end of the water pump is connected to the water pipe through a water pipe, the bottom end of the water pipe passes through the interior of the dust box and is fixed with a spray dust reduction component.

[0009] A further improvement is that the spray dust reduction assembly includes a spray pipe fixed to the bottom end of the water pipe and an atomizing spray head equidistantly fixed to the bottom end of the spray pipe, and the spray pipe is hung and fixed to the top of the dust collection box through a hanging piece.

[0010] Further improvements are: a drive box fixed to the top of the base and a threaded plate located inside the drive box are provided below the support plate, the output end of the first motor passes through the drive box through a bearing and is fixed with a threaded screw that threads through the threaded plate, and a vertical plate that slides through the top of the drive box is symmetrically fixed between the threaded plate and the support plate.

[0011] A further improvement is that a through groove adapted to the vertical plate is opened at the top of the driving box, supporting pulleys are symmetrically fixed to the bottom of the supporting plate, and sliding rails adapted to the supporting pulleys are symmetrically opened at the top of the driving box.

[0012] A further improvement is that the spring telescopic mechanism includes a sleeve fixedly connected to the L-shaped support plate and a slide rod fixedly connected to the scraper plate, and the bottom end of the slide rod slides through the inside of the sleeve and is fixedly connected to the bottom end of the sleeve through a limit spring.

[0013] The beneficial effects of the present invention are as follows: the present invention uses the exhaust fans on the left and right side walls of the dust collection box to exhaust air in the dust collection box, and uses the dust collection boxes on both sides of the top of the conveying platform to suck the dust scattered during the ash and slag conveying process into the dust collection box through the dust collection holes, and uses the filtering and purification mechanism to filter and process the sucked dust, so that the dust scattered into the air during the ash and slag conveying process can be effectively processed, avoiding environmental pollution, and being more environmentally friendly;

[0014] The spring expansion mechanism provides an upward elastic push force for the scraper plate, so that the scraper plate comes into contact with the bottom surface of the conveyor belt, so that the ash and slag that are attached to the surface of the conveyor belt and are not easy to fall off can be scraped off and fall smoothly into the ash and slag collection box, thereby ensuring the normal transmission of the ash and slag;

[0015] In addition, the weight of the ash collection box is monitored in real time by a pressure sensor, and when the weight is detected to exceed a preset value, the first motor is started to drive the loaded ash collection box out from under the conveyor belt, and at the same time, the empty ash collection box is moved to under the conveyor belt to continue loading ash, thereby achieving accurate control of the ash loading amount in the ash collection box and avoiding overloading or underloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front view of the present invention;

[0017] Figure 2 is a front cross-sectional view of the present invention;

[0018] Figure 3 The present invention Figure 2 A in the enlarged view;

[0019] Figure 4 is a side sectional view of the present invention;

[0020] Figure 5 is a side sectional view of a drive box of the present invention;

[0021] Figure 6 is a cross-sectional view of the spring telescopic mechanism of the present invention;

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the L-shaped support plate and the scraper plate of the present invention.

[0023] Wherein: 1. base; 2. conveying platform; 3. conveying roller; 4. conveyor belt; 5. feeding trough; 6. first motor; 7. support plate; 8. support spring; 9. load-bearing plate; 10. pressure sensor; 11. ash collection box; 12. L-shaped support plate; 13. scraper plate; 14. dust suction box; 15. dust suction box; 16. dust suction pipe; 17. dust suction hole; 18. motor box; 19. second motor; 20. spiral stirring shaft; 21. support column; 22. support rod; 23. rubber rib; 24. filter screen; 25. water pipe; 26. water pump; 27. water pipe; 28. spray pipe; 29. ​​atomizing spray head; 30. drive box; 31. threaded plate; 32. threaded screw; 33. vertical plate; 34. support pulley; 35. sleeve; 36. slide rod; 37. exhaust fan. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] After decarbonization of petroleum coke, ash will be produced. The main types of ash include: boiler ash from coal-fired boilers, biomass ash from biomass combustion, CFB ash from circulating fluidized bed boilers, fly ash from coal-fired power plants, and incineration slag from waste incineration plants. Ash has various uses. It can be used as a cement raw material for cement production, as a fertilizer to improve soil structure, and can also be used to produce energy products such as biochar. It can be seen that ash, as a common industrial by-product, its treatment and utilization are of great significance to environmental protection and resource conservation. Through reasonable preparation methods and regulatory guidance, ash can be converted into valuable resources to achieve sustainable development.

[0026] The development of ash conveying technology has gone through several stages, from the initial simple mechanical transmission to the modern automatic control system, and has been applied in many industrial fields, especially in places where a large amount of ash is generated, such as thermal power plants, waste incineration plants and chemical plants. For example, after the boiler in a thermal power plant is burned, a large amount of fly ash and slag will be generated, which needs to be processed and transported by the ash removal system;

[0027] Based on the prior art, it is found that most of the existing ash conveying devices have a single function and only have a single conveying function, but do not have a dust suction function, which causes the dust that escapes into the air during the ash conveying process to easily pollute the environment, which is not environmentally friendly. In addition, the ash at the bottom layer during the conveying process is easy to adhere to the surface of the conveyor belt, thereby affecting the normal conveying of the ash. In addition, after the ash is conveyed to the collection box, the ash loading amount in each collection box cannot be accurately controlled, and the problem of overloading or underloading may easily occur.

[0028] For the problems existing in the above-mentioned prior art, see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7The present embodiment provides an ash conveying device, comprising a base 1 fixed to the ground by bolts and a conveying platform 2 located directly above the base 1. The conveying platform 2 has a concave cross-section and an external motor is arranged on the outside. The conveying platform 2 is symmetrically provided with conveying rollers 3 driven to rotate by the external motor. A conveying belt 4 is sleeved on two sets of conveying rollers 3. The conveying rollers 3 are used to drive the conveying belt 4 to operate so as to provide a conveying function. A feeding trough 5 for feeding ash is fixed on the right side of the top of the conveying platform 2. A spiral feeding mechanism for spirally stirring the ash is arranged inside the feeding trough 5. A support plate 7 is slidingly provided on the left side of the top of the base 1, and the support plate 7 is driven by a first motor 6 and moves longitudinally forward and backward. A load-bearing plate 9 is arranged on both sides of the front and rear of the top of the support plate 7. The bottom end of the load-bearing plate 9 is fixedly connected to the support plate 7 by four sets of symmetrically distributed support springs 8. The support springs 8 provide elastic support for the load-bearing plate 9. A pressure sensor 10 is provided, which is fixed to the top of the support plate 7 by bolts. An ash collection box 11 for loading and collecting the conveyed ash is placed on the top of the load-bearing plate 9. The detection end at the top of the pressure sensor 10 contacts the load-bearing plate 9 to monitor the weight of the load-bearing plate 9 (as the amount of ash in the ash collection box 11 increases, the load-bearing plate 9 will gradually press down). The pressure sensor 10 is connected to the PLC control system of the device, and is used to start the first motor 6 to drive the support plate 7 to move when it is monitored that the weight of the load-bearing plate 9 exceeds a preset value. The weight of the ash collection box 11 is monitored in real time through the pressure sensor 10, and when it is monitored that the weight exceeds a preset value, the first motor 6 is started to drive the loaded ash collection box 11 to move out from under the conveyor belt 4, and at the same time, the empty ash collection box 11 is moved to the bottom of the conveyor belt 4 to continue loading ash, thereby realizing accurate control of the ash loading amount in the ash collection box 11;

[0029] An L-shaped support plate 12 is fixed to the left side of the bottom end of the conveyor platform 2 by bolts, a spring telescopic mechanism is symmetrically fixed to the bottom end of the inner side of the L-shaped support plate 12 by bolts, and a scraper plate 13 is fixed to the top of the spring telescopic mechanism by bolts, and the spring telescopic mechanism provides an upward elastic ejection force for the scraper plate 13, so that the scraper plate 13 is in conflict with the bottom surface of the conveyor belt 4, so that the ash and slag attached to the surface of the conveyor belt 4 that is not easy to fall off can be scraped off and smoothly fall into the ash and slag collection box 11;

[0030] A dust box 14 is fixed to the top of the base 1 by bolts, and exhaust fans 37 are fixed to the left and right side walls of the dust box 14 for exhausting air from the dust box 14 to generate suction inside the dust box 14. A filtering and purification mechanism for filtering dust is provided inside the dust box 14. A dust box 15 is symmetrically fixed to the top of the conveyor platform 2 by bolts. Two groups of dust boxes 15 are respectively located on the front and rear sides of the conveyor belt 4. Dust pipes 16 are fixed to the side walls on the opposite sides of the two groups of dust boxes 15, and the dust pipes 16 are away from the dust boxes 15. One end is connected to the dust box 14, and dust holes 17 for dust to enter are equidistantly provided on one side of the dust box 15 close to the conveyor belt 4. The dust box 14 is exhausted by the exhaust fans 37 on the left and right side walls, and the dust boxes 15 on both sides of the top of the conveying platform 2 are used to suck the dust escaped during the ash conveying process into the dust box 15 through the dust holes 17, and the dust sucked in is simultaneously treated by the filtering and purification mechanism, so that the dust scattered into the air during the ash conveying process is effectively treated.

[0031] The spiral feeding mechanism includes a motor box 18 and a second motor 19, wherein the motor box 18 is arranged at the center position inside the feeding trough 5 and is connected to the inner wall of the feeding trough 5 through a connecting rod, and the second motor 19 is fixed in the motor box 18 by bolts, and the output end of the second motor 19 passes through the motor box 18 through a bearing and is fixed with a spiral stirring shaft 20, and the lower part of the spiral stirring shaft 20 extends to the discharge port at the bottom end of the feeding trough 5, and the ash in the feeding trough 5 is spirally stirred by the spiral stirring shaft 20 to prevent the ash from being blocked at the discharge port during the feeding process.

[0032] Four groups of symmetrically distributed support columns 21 are fixed to the bottom of the conveying platform 2 by bolts, and the bottom ends of the support columns 21 are fixed to the top of the base 1 by bolts to provide stable support for the conveying platform 2. Symmetrically distributed support rods 22 are welded and fixed to the bottom end of the feeding trough 5, and the bottom ends of the support rods 22 are welded and fixed to the top of the conveying platform 2. Rubber retaining edges 23 are fixed on the front and back sides of the outer surface of the conveying platform 2, which have a certain blocking effect on the ash and slag in the conveying process to prevent the ash and slag from falling out from the front and back sides of the conveyor belt 4.

[0033] The filtration and purification mechanism includes a filter screen plate 24 and a water pipe 25, wherein the filter screen plate 24 is fixed to the inside of the dust box 14 by bolts, the water pipe 25 is fixed to the top of the dust box 14, and spray water is stored at the bottom of the dust box 14. The lower part of the left and right side walls of the dust box 14 are connected to a water pump 26, and the output of the water pump 26 is connected to a water pipe 27. The end of the water pipe 27 away from the water pump 26 is connected to the water pipe 25, and the bottom end of the water pipe 25 penetrates into the dust box 14 and A spray dust reduction component is fixed, and the spray water at the bottom of the dust box 14 is injected into the water pipe 25 through the water pump 26 through the water pump 27, and then injected into the spray dust reduction component through the water pipe 25. Finally, the spray dust reduction component sprays the dust in the dust box 14 to reduce dust. The dust-containing spray water passes through the filter screen 24 to filter out impurities and then enters the bottom of the dust box 14 for reuse. The dust is intercepted on the filter screen 24, thereby filtering and purifying the dust and preventing the dust from spilling to the outside.

[0034] The spray dust reduction assembly includes a spray pipe 28 and an atomizing spray head 29, wherein the spray pipe 28 is fixed to the bottom end of the water pipe 25, and the atomizing spray head 29 is equidistantly fixed to the bottom end of the spray pipe 28. The spray pipe 28 is suspended and fixed to the top of the dust collection box 14 through a hanging piece. The spray water in the water pipe 25 enters the spray pipe 28 and is then sprayed out by the atomizing spray head 29.

[0035] A driving box 30 is provided below the support plate 7. The driving box 30 is fixed to the top of the base 1 by bolts. A threaded plate 31 is provided inside the driving box 30. The output end of the first motor 6 passes through the driving box 30 through a bearing and is fixed with a threaded screw 32. The threaded plate 31 is threadedly sleeved on the threaded screw 32. A vertical plate 33 is symmetrically fixed to the top of the threaded plate 31. The top of the vertical plate 33 slides through the outside of the driving box 30 and is fixed to the bottom of the support plate 7. The threaded screw 32 is driven to rotate by the first motor 6, so that the threaded plate 31 threadedly sleeved on the threaded screw 32 moves forward and backward along the threaded screw 32. During the displacement of the threaded plate 31, the support plate 7 is driven to move forward and backward through the vertical plate 33.

[0036] A through groove adapted to the vertical plate 33 is provided at the top of the driving box 30 to allow the vertical plate 33 to move forward and backward. Support pulleys 34 are symmetrically fixed to the bottom of the support plate 7 to provide rolling support for the support plate 7, making the movement of the support plate 7 smoother. Slide rails adapted to the support pulleys 34 are symmetrically provided at the top of the driving box 30.

[0037] The spring telescopic mechanism includes a sleeve 35 and a slide rod 36, wherein the sleeve 35 is fixedly connected to the L-shaped support plate 12 by bolts, and the slide rod 36 is fixed to the scraper plate 13 by bolts. The bottom end of the slide rod 36 slides through the interior of the sleeve 35 and is fixedly connected to the bottom end of the sleeve 35 by a limit spring. The limit spring provides an elastic ejection force for the slide rod 36, thereby pushing the scraper plate 13 upward so that it contacts the bottom surface of the conveyor belt 4.

[0038] When the ash needs to be transported, the external motor of the conveying platform 2 is first turned on to drive the conveying roller 3 to drive the conveyor belt 4 to operate. The ash to be transported is poured into the feeding trough 5 and fed from the discharge port at the bottom thereof to the right side of the conveyor belt 4 (the spiral feeding mechanism is started to stir the ash during the feeding process to avoid clogging of the discharge port at the bottom of the feeding trough 5). The ash fed onto the conveyor belt 4 is transported from right to left along the conveyor belt 4. Dust will inevitably be generated during the transportation process. At this time, the exhaust fans 37 on the left and right side walls of the dust collection box 14 are started, and the dust collection boxes 15 on both sides of the top of the conveying platform 2 are used to remove the scattered dust through the dust collection holes. 17 is sucked into the dust box 15, and then sucked into the dust box 14 through the dust pipe 16 (the suction force can only remove light dust, and cannot remove heavy ash). At the same time, the dust is filtered by the filtering and purification mechanism to achieve effective dust removal during the transmission process. When the ash is transmitted to the leftmost side along the conveyor belt 4, it falls from the conveyor belt 4 to the ash collection box 11 under the action of gravity, realizing the centralized collection of the ash after transmission, and the ash attached to the conveyor belt 4 that is not easy to fall off is scraped off by the scraper plate 13, and slides along the inclined scraper plate 13 to the ash collection box 11, avoiding the ash from adhering to the surface of the conveyor belt 4;

[0039] When the ash collecting box 11 receives and loads the transported ash, the pressure sensor 10 is used to monitor the weight of the ash collecting box 11 in real time. When the monitored weight exceeds the preset value, the ash loading amount in the surface ash collecting box 11 reaches the set value, and the first motor 6 is started to drive the support plate 7 to move longitudinally, and the loaded ash collecting box 11 at the top is moved out from under the conveyor belt 4, and the empty ash collecting box 11 on the other side of the top is moved to the bottom of the conveyor belt 4 to continue loading the transported ash (the two groups of ash collecting boxes 11 are handled in a state of being fitted together to prevent ash from falling to the outside), so as to achieve accurate control of the ash loading amount inside the ash collecting box 11 and avoid overloading or underloading.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An ash conveying device, comprising a base (1), characterized in that: A conveying platform (2) is fixed above the base (1), conveying rollers (3) are symmetrically arranged inside the conveying platform (2), and conveyor belts (4) are sleeved on two sets of conveying rollers (3). A feeding trough (5) is fixed on one side of the top of the conveying platform (2), and a spiral feeding mechanism is arranged inside the feeding trough (5). A support plate (7) driven to move by a first motor (6) is slidably arranged on the side of the top of the base (1) away from the feeding trough (5), and a load-bearing plate (9) is connected to both sides of the top of the support plate (7) through a support spring (8), and a pressure sensor (10) electrically connected to the first motor (6) is arranged below the load-bearing plate (9), and an ash collection box (10) is placed on the top of the load-bearing plate (9). 1), an L-shaped support plate (12) is fixed on one side of the bottom end of the conveying platform (2) close to the ash collection box (11), the inner bottom end of the L-shaped support plate (12) is connected to a scraper plate (13) that contacts the conveyor belt (4) through a spring telescopic mechanism, a dust box (14) is fixed on the top of the base (1), exhaust fans (37) are fixed on both side walls of the dust box (14), a filtering and purification mechanism is provided inside the dust box (14), a dust box (15) is symmetrically fixed on the top of the conveying platform (2), the dust box (15) and the dust box (14) are connected through a dust pipe (16), and dust holes (17) are equidistantly provided on the side of the dust box (15) close to the conveyor belt (4).

2. An ash conveying device according to claim 1, characterized in that: The spiral feeding mechanism comprises a motor box (18) fixed inside the feeding trough (5) and a second motor (19) fixed inside the motor box (18); the output end of the second motor (19) passes through the motor box (18) through a bearing and is fixed with a spiral stirring shaft (20); the lower part of the spiral stirring shaft (20) extends to the discharge port at the bottom end of the feeding trough (5).

3. An ash conveying device according to claim 1, characterized in that: Support columns (21) are symmetrically fixed between the base (1) and the conveying platform (2), support rods (22) are symmetrically fixed between the feeding trough (5) and the conveying platform (2), and rubber retaining edges (23) are fixed on both the front and rear sides of the outer surface of the conveying platform (2).

4. An ash conveying device according to claim 1, characterized in that: The filtering and purification mechanism comprises a filter screen plate (24) fixed inside the dust box (14) and a water pipe (25) fixed at the top of the dust box (14); spray water is stored at the lower part of the dust box (14); the lower parts of the two side walls of the dust box (14) are connected to a water pump (26); the output end of the water pump (26) is connected to the water pipe (25) through a water pipe (27); the bottom end of the water pipe (25) passes through the inside of the dust box (14) and is fixed with a spray dust reduction component.

5. An ash conveying device according to claim 4, characterized in that: The spray dust suppression assembly comprises a spray pipe (28) fixed to the bottom end of a water pipe (25) and an atomizing spray head (29) fixed to the bottom end of the spray pipe (28) at an equal distance. The spray pipe (28) is suspended and fixed to the top end of the dust collection box (14) through a suspension member.

6. An ash conveying device according to claim 1, characterized in that: A drive box (30) fixed to the top of the base (1) and a threaded plate (31) located in the drive box (30) are provided below the support plate (7); an output end of the first motor (6) penetrates into the drive box (30) through a bearing and is fixed with a threaded screw (32) threadedly penetrating the threaded plate (31); a vertical plate (33) slidably penetrating the top of the drive box (30) is symmetrically fixed between the threaded plate (31) and the support plate (7).

7. An ash conveying device according to claim 6, characterized in that: A through groove adapted to the vertical plate (33) is provided at the top of the driving box (30), a supporting pulley (34) is symmetrically fixed to the bottom of the supporting plate (7), and a slide rail adapted to the supporting pulley (34) is symmetrically provided at the top of the driving box (30).

8. An ash conveying device according to claim 1, characterized in that: The spring expansion and contraction mechanism comprises a sleeve (35) fixedly connected to the L-shaped support plate (12) and a slide rod (36) fixedly connected to the scraper plate (13); the bottom end of the slide rod (36) slides through the inside of the sleeve (35) and is fixedly connected to the bottom end of the inside of the sleeve (35) through a limit spring.

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