Scraping mechanism and coal bunker

Abstract

The invention relates to the field of coal feeders, in particular to a scraping mechanism and a coal bunker. The scraping mechanism comprises a butt joint assembly, and the butt joint assembly comprises a base; the scraping plate assembly comprises a first scraping plate; the connecting assembly comprises a sliding way arranged in the base, a connecting body is arranged in the sliding way, and the connecting body is connected with the first scraping plate; the connecting assembly further comprises a limiting groove formed in the side wall of the connecting body, a limiting body is fixedly arranged on the inner wall of the sliding way, and the limiting body is an elastic body. Through the matched design of the limiting body and the limiting groove, during normal scraping, the base drives the first scraping plate to rotate to scrape materials, and when the first scraping plate is subjected to large rotating resistance due to large material viscosity, a large amount of sticky materials or material blockage, the limiting body can be extruded to deform and penetrate through the positioning groove, so that the base and the first scraping plate slide relatively; the first scraping plate is prevented from being snapped due to rotation of the base, and the motor is prevented from being burnt due to blocking and locking of the first scraping plate.

Description

Technical Field

[0001] This invention relates to the field of coal feeders, and in particular to a scraping mechanism and a coal bunker. Background Technology

[0002] A coal feeder is a high-efficiency material conveying device, specifically designed for precise control and continuous coal supply. The coal feeder supplies material through a coal bunker, which has an inverted cone-shaped structure. The inverted cone-shaped coal bunker is characterized by a gradual reduction in the cross-sectional area along the material flow direction.

[0003] During the coal bunker feeding process, the coal is quite sticky due to its high moisture content, and some coal will adhere to the inner wall of the bunker. The current method of handling this is generally to use a scraper to remove it. However, due to the reduction in the downward flow area of ​​the coal bunker, the bottom of the bunker cone may become blocked. Once blocked, the scraper will be stuck, making it difficult for the scraper to move, which may lead to the scraper breaking, affecting its use, and in severe cases, it may cause the motor to burn out. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is: how to reduce the impact of coal bunker blockage on the scraper mechanism.

[0005] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a scraping mechanism, including: a docking assembly, the docking assembly including an annular base; a scraper assembly including a first scraper; and a connecting assembly for connecting the base and the first scraper. The connecting assembly includes a slide rail coaxially disposed inside the base, the slide rail being annular, and a connecting body slidably disposed inside the slide rail, the connecting body being connected to the first scraper. The connecting assembly further includes a limiting groove disposed on the side wall of the connecting body, the limiting groove penetrating both ends of the connecting body. A limiting body is fixedly disposed on the inner wall of the slide rail, the limiting body being an elastic body. Along the rotation direction of the base, a portion of the limiting body extends into the limiting groove, and the portion of the limiting body outside the limiting groove is a blocking part, which can deform and contract to pass through the limiting groove when subjected to a certain compressive force.

[0006] In a preferred embodiment of the scraping mechanism of the present invention: along the rotation direction of the base, the thickness of the limiting body gradually decreases, and the thickness of the limiting body at least in some positions is greater than the depth of the limiting groove.

[0007] In a preferred embodiment of the scraping mechanism of the present invention: a passage is provided between the slide and the inner wall of the base, the passage is annular and coaxial with the base, a connecting part is integrally provided on the side wall of the connecting body, the connecting part passes through the passage and is fixed on the first scraper, a sealing member is provided at the passage, the sealing member includes two sealing rings arranged opposite each other, the ends of the two sealing rings are fitted together, the sealing rings are elastic members, and the connecting part passes between the two sealing rings.

[0008] In a preferred embodiment of the scraping mechanism of the present invention: the connecting part is a rhomboid shape that gradually narrows from the middle to both ends, and the pointed part of the connecting part adopts a rounded transition.

[0009] The present invention also proposes a coal bunker, including a scraping mechanism, and further including: a feeding section, the feeding section having a trumpet-shaped structure that is wider at the top and narrower at the bottom; a discharging section, the discharging section being a cylindrical structure coaxially disposed at the lower part of the feeding section; and a base coaxially rotatably disposed between the feeding section and the discharging section; wherein, the lower end of the feeding section is coaxially provided with an annular first mounting groove, and the upper end of the base is coaxially provided with an annular first mounting part, the first mounting part being axially slidably disposed in the first mounting groove, the top surface of the first mounting part abutting the bottom of the first mounting groove, and both the top surface of the first mounting part and the bottom of the first mounting groove having undulating wavy structures, and the wavy structure of the top surface of the first mounting part and the wavy structure of the bottom of the first mounting groove being adapted to each other.

[0010] In a preferred embodiment of the coal bunker of the present invention: the lower end of the feeding section is an elastic part located on the side of the first mounting groove.

[0011] In a preferred embodiment of the coal bunker of the present invention: the lower end of the first scraper is connected to the base, the upper end of the first scraper extends into the inside of the feeding section, and the first scraper and the inside of the feeding section are in close contact. A clearance portion is provided on the first scraper facing the side wall of the first mounting groove. The clearance portion is in the shape of a long plate. One end of the clearance portion is integrally connected to the first scraper. A clearance opening is provided between the clearance portion and the first scraper. At least one support member is provided in the clearance opening. The support member is an elastic member. A spacer is wrapped around the outside of the clearance portion of the first scraper.

[0012] In a preferred embodiment of the coal bunker of the present invention: the upper end of the discharge section is coaxially provided with an annular second mounting groove, the lower end of the base is integrally coaxially provided with an annular second mounting part, the second mounting part is slidably disposed in the second mounting groove, the scraper assembly further includes a second scraper, the upper end of the second scraper is fixed to the inner wall of the base, the lower end of the second scraper extends into the interior of the discharge section, and the second scraper and the inner wall of the discharge section are in contact.

[0013] In a preferred embodiment of the coal bunker of the present invention: a C-shaped frame is provided between the feeding section and the discharging section, one end of the C-shaped frame is fixed to the outer wall of the feeding section, the other end of the C-shaped frame is fixed to the outer wall of the discharging section, and the C-shaped frame has at least a partial elastic section.

[0014] In a preferred embodiment of the coal bunker of the present invention, a drive assembly is further included, the drive assembly including a gear ring coaxially disposed on the outer wall of the base, a gear meshing on the gear ring, and a motor connected to the gear.

[0015] The beneficial effects of this invention are as follows: Through the cooperative design of the limiting body and the limiting groove, during normal scraping, the base drives the first scraper to rotate and scrape the material. When the first scraper experiences significant rotational resistance due to high material viscosity, excessive material adhesion, or material blockage, the limiting body can be squeezed and deformed to pass through the positioning groove, allowing the base and the first scraper to slide relative to each other. This prevents the first scraper from being pulled off due to the rotation of the base and avoids the motor from seizing and burning out due to the obstruction of the first scraper. The base and the coal bunker feeding section are in contact with a wave structure that undulates up and down. During the rotation of the base, the cycle of wave crest contacting and wave trough contact drives the coal bunker feeding section to move up and down, forming a vibration clearing effect. At the same time, when the coal bunker feeding section moves downward, it compresses the lower end of the coal bunker feeding section and bends it inward, which can form a lateral compression on the blocked material, further clearing the blockage. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of the scraping mechanism of the present invention is shown; Figure 2 A schematic diagram of the internal structure of the scraping mechanism of the present invention is shown; Figure 3 A schematic diagram of the structure of the base of the present invention is shown; Figure 4 A schematic diagram showing the connection between the limiting groove and the limiting body of the present invention is shown; Figure 5 A schematic diagram of the structure at the first scraper of the present invention is shown; Figure 6 A schematic diagram of the internal structure of the spacer at the first scraper of the present invention is shown; Figure 7 A schematic diagram of the overall structure of the coal bunker of the present invention is shown; Figure 8 A schematic diagram of the internal structure of the coal bunker of the present invention is shown; Figure 9A schematic diagram of the coal bunker feeding section of the present invention is shown; Figure 10 A schematic diagram of the coal bunker discharge section of the present invention is shown. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0019] Reference Figures 1 to 6 This embodiment provides a scraping mechanism, including, The docking component 1 includes a ring-shaped base 11; Scraper assembly 2, which includes a first scraper 21; The connecting component 3 is used to connect the base 11 and the first scraper 21. The connecting component 3 includes a slide 31 coaxially disposed inside the base 11. The slide 31 is annular. A connecting body 32 is slidably disposed inside the slide 31. The connecting body 32 is connected to the first scraper 21. The connecting component 3 also includes a limiting groove 33 disposed on the side wall of the connecting body 32. The limiting groove 33 passes through both ends of the connecting body 32. A limiting body 34 is fixedly disposed on the inner wall of the slide 31. The limiting body 34 is an elastic body. Along the rotation direction of the base 11, part of the limiting body 34 extends into the limiting groove 33. The part of the limiting body 34 outside the limiting groove 33 is a blocking part. The blocking part can deform and shrink to pass through the limiting groove 33 when subjected to a certain extrusion force.

[0020] By designing the connecting component 3, when the first scraper 21 is subjected to greater resistance, the base 11 and the first scraper 21 can slide relative to each other, thereby releasing the drive of the motor 73 to rotate the first scraper 21, reducing the possibility of the first scraper 21 breaking under stress, and preventing the motor 73 spindle from jamming and burning out.

[0021] Specifically, the base 11 has an annular slide 31 inside, and the lower end of the first scraper 21 is integrally connected to the connecting body 32. During normal scraping, the limiting body 34 extends into the limiting groove 33, and the portion of the limiting body 34 outside the limiting groove 33 acts as a blocking part, preventing the limiting body 34 from sliding along the slide 31. This causes the limiting body 34 to rotate with the base 11, thereby driving the first scraper 21 to rotate and perform scraping. When the material viscosity is high or blockage occurs, preventing the first scraper 21 from rotating and scraping, the first scraper 21 is difficult to rotate, while the base 11 needs to continue rotating due to the driving force. This causes a tendency for relative movement between the base 11 and the limiting body 34. Under this tendency, the end of the limiting groove 33 presses against the limiting body 34. When the pressing force is greater than the elastic deformation force required by the limiting body 34, the limiting body 34 is compressed and retracted into the limiting groove 33, releasing the obstruction to the relative sliding of the base 11 and the connecting body 32, so that the base 11 can slide relative to the connecting body 32. That is, at this time, the base 11 slides relative to the first scraper 21, instead of the base 11 getting stuck together with the first scraper 21. This avoids the scraper being broken due to the continued rotation of the base 11, and prevents the power source from burning out due to the component seizing.

[0022] Of course, the thickness of the part of the limiting body 34 outside the limiting groove 33 needs to be specifically designed based on the elasticity of the limiting body 34 and the driving force of the driving source. It is necessary to ensure that when stuck, the driving force of the driving source can deform and shrink the blocking part into the limiting groove 33.

[0023] In some implementations, refer to Figure 4 Along the rotation direction of the base 11, the thickness of the limiting body 34 gradually decreases, and the thickness of the limiting body 34 at least in some positions is greater than the depth of the limiting groove 33.

[0024] The limiting body 34 is specifically designed as a right trapezoid or right triangle elastic body structure. The straight end of the elastic body is fixed to the inner wall of the slide 31. Along the rotation direction of the base 11, the thinner end of the limiting body 34 first enters the limiting groove 33 to ensure that the limiting body 34 is at least partially inside the limiting groove 33. As the base 11 rotates, the limiting body 34 gradually enters the limiting groove 33 until the thicker part is stuck at the end of the limiting groove 33. At this time, the connecting body 32 and the base 11 rotate together, thereby causing the base 11 to drive the first scraper 21 to rotate and perform scraping work.

[0025] In some implementations, refer to Figure 2 and Figure 3A passage 35 is provided between the slide 31 and the inner wall of the base 11. The passage 35 is annular and coaxial with the base 11. A connecting part 36 is integrally provided on the side wall of the connecting body 32. The connecting part 36 passes through the passage 35 and is fixed on the first scraper 21. A sealing member 37 is provided at the passage 35. The sealing member 37 includes two sealing rings 371 arranged opposite each other. The ends of the two sealing rings 371 are fitted together. The sealing rings 371 are elastic members. The connecting part 36 passes between the two sealing rings 371.

[0026] The connecting body 32 is specifically connected to the first scraper 21 via the connecting part 36. The connecting body 32, the connecting part 36, and the first scraper 21 can be an integral structure. In order to enable the connecting body 32 and the first scraper 21 to rotate relative to the base 11, a passage 35 is provided between the inner wall of the base 11 and the slide 31 to provide rotation space for the connecting part 36 to rotate.

[0027] To prevent material from entering the slide 31 through the passage 35, a sealing element 37 is provided at the passage 35 to block the rest of the passage 35 except for the part where the connecting part 36 is located, thus preventing material from entering. Specifically, the sealing element 37 consists of two opposing sealing rings 371, with the ends of the two sealing rings 371 fitting together to form a closed barrier to prevent material from entering. The connecting part 36 is located between the two sealing rings 371. When the connecting part 36 rotates, since the sealing rings 371 are elastic, the connecting part 36 squeezes the sealing rings 371 to avoid obstructing the normal rotation of the connecting part 36. When the connecting part 36 rotates, the squeezed part here recovers its deformation.

[0028] As an optional embodiment, refer to Figure 5 and Figure 6 To further reduce the opening size of the sealing element 37 at the connecting part 36, the connecting part 36 is a rhomboid shape that gradually narrows from the middle to both ends. The pointed part of the connecting part 36 adopts an arc transition. When the connecting part 36 opens the two sealing rings 371, the shape of the opening fits the shape of the connecting part 36 because the connecting part 36 is rhomboid, preventing the opening from being too large and causing material to enter. At the same time, when the rhomboid connecting part 36 rotates, the pointed end of the connecting part 36 is more conducive to opening the two sealing rings 371. The pointed part of the connecting part 36 adopts an arc transition to reduce wear.

[0029] In one embodiment provided in this application, reference is made to Figures 7 to 10 A coal bunker, including a scraping mechanism, and also including, Feeding section 4 has a funnel-shaped structure that is wider at the top and narrower at the bottom; Discharge section 5 is a cylindrical structure coaxially located at the lower part of feed section 4; The base 11 is coaxially rotatably disposed between the feeding section 4 and the discharging section 5; Specifically, the inner and outer diameters of the lower end of the feeding section 4, the inner and outer diameters of the base 11, and the inner and outer diameters of the discharge section 5 are the same, so that the feeding section 4, the base 11, and the discharge section 5 are assembled together in a fitting manner.

[0030] The lower end of the feeding section 4 is coaxially provided with an annular first mounting groove 41, and the upper end of the base 11 is coaxially provided with an annular first mounting part 111. The first mounting part 111 is axially slidably disposed in the first mounting groove 41. The top surface of the first mounting part 111 abuts against the bottom of the first mounting groove 41. Both the top surface of the first mounting part 111 and the bottom of the first mounting groove 41 are undulating wave-like structures, and the wave-like structure of the top surface of the first mounting part 111 and the wave-like structure of the bottom of the first mounting groove 41 are adapted to each other.

[0031] At the connection between the base 11 and the feeding section 4, a wave-like contact design with up-and-down undulations is adopted. While the base 11 rotates to scrape the material, it can form a slight up-and-down vibration of the feeding section 4, which is more conducive to material discharge. When there is a blockage, this vibration may shake off the blocked material, which has a certain clearing effect.

[0032] Specifically, the top surface of the first mounting part 111 at the upper end of the base 11 adopts a wave-shaped design, and the bottom of the first mounting groove 41 at the lower end of the feeding section 4 adopts a wave-shaped design with the same slope direction as the top surface of the first mounting part 111. When the base 11 rotates relative to the feeding section 4, when the crest of the top surface of the first mounting part 111 and the crest of the bottom of the first mounting groove 41 come into contact with each other, the feeding section 4 is lifted up. As the base 11 continues to rotate, the top surface of the first mounting part 111 and the bottom of the first mounting groove 41 gradually change from the point where the crests meet to the point where the troughs meet. During this process, the feeding section 4 gradually descends. This cycle is repeated to realize the up and down movement of the feeding section 4, thereby achieving the function of vibration clearing blockage.

[0033] In some embodiments, the lower end of the feed section 4 is an elastic part 42 located on the side of the first mounting groove 41.

[0034] The sidewall of the first mounting groove 41 is made of an elastic part 42. Utilizing the elasticity of the elastic part 42, the lower end of the sidewall of the first mounting groove 41 is rotatably fixed to the base 11, maintaining close contact between the base 11 and the feeding section 4. This prevents an opening from forming between the lower end of the feeding section 4 and the base 11, causing material to flow out, as the feeding section 4 moves up and down. Specifically, the lower ends of the first mounting groove 41 are rotatably fixed on both sides of the top of the base 11 at the positions of the first mounting part 111. When the feeding section 4 moves upward, the first mounting part 41... The sidewall of the first mounting groove 41 unfolds upward. When the feeding section 4 moves downward, the sidewall of the first mounting groove 41 is squeezed and bent downward to adapt to the up and down vibration of the feeding section 4. At the same time, due to the obstruction of the first mounting part 111, when the sidewall of the first mounting groove 41 is squeezed and bent downward by the feeding section 4, it can only bend inward towards the feeding section 4. This position corresponds to the narrow opening at the lower end of the feeding section 4, which is prone to blockage. When blockage occurs, the bending of the sidewall of the first mounting groove 41 forms a lateral squeeze on the blocked material, which can further play a certain role in clearing the blockage.

[0035] In some implementations, refer to Figure 5 , Figure 6 and Figure 8 The lower end of the first scraper 21 is connected to the base 11, and the upper end of the first scraper 21 extends into the feed section 4. The first scraper 21 and the feed section 4 are in close contact. A clearance part 211 is provided on the side wall of the first mounting groove 41, and the clearance part 211 is in the shape of a long plate. One end of the clearance part 211 is integrally connected to the first scraper 21. A clearance opening 212 is provided between the clearance part 211 and the first scraper 21. At least one support member 213 is provided in the clearance opening 212. The support member 213 is an elastic member. A spacer 214 is wrapped around the outside of the clearance part 211 of the first scraper 211.

[0036] Since the feeding section 4 is trumpet-shaped, the first scraper 21 has a curved section to fit the inner wall of the feeding section 4. At the position of the first scraper 21 relative to the side wall of the first mounting groove 41, a relief part 211 is provided. When the side wall of the first mounting groove 41 bends inward, the relief part 211 is squeezed and the relief part 211 moves to the relief opening 212 to avoid the bending of the side wall of the first mounting groove 41 from lifting the first scraper 21 and causing the first scraper 21 and the inner wall of the feeding section 4 to lose their fit.

[0037] In some implementations, refer to Figure 8 and Figure 10The upper end of the discharge section 5 is coaxially provided with an annular second mounting groove 51, and the lower end of the base 11 is integrally coaxially provided with an annular second mounting part 112. The second mounting part 112 is slidably disposed in the second mounting groove 51. The scraper assembly 2 also includes a second scraper 22. The upper end of the second scraper 22 is fixed to the inner wall of the base 11, and the lower end of the second scraper 22 extends into the interior of the discharge section 5, and the second scraper 22 and the inner wall of the discharge section 5 are in contact.

[0038] The base 11 is rotatably connected to the discharge section 5 via the second mounting groove 51 and the second mounting part 112. A second scraper 22 is also provided on the base 11. The second scraper 22 extends downward into the discharge section 5 to scrape off the material adhering to the inner wall of the discharge section 5.

[0039] In some implementations, refer to Figure 7 A C-shaped frame 6 is provided between the feeding section 4 and the discharging section 5. One end of the C-shaped frame 6 is fixed to the outer wall of the feeding section 4, and the other end of the C-shaped frame 6 is fixed to the outer wall of the discharging section 5. The C-shaped frame 6 has at least a partially elastic section 61.

[0040] The C-shaped frame 6 is designed to support the feeding section 4, preventing the weight of the feeding section 4 and the internal coal from pressing on the base 11, ensuring the normal rotation of the base 11, and reducing wear on the rotating contact parts.

[0041] In some implementations, refer to Figure 7 It also includes a drive assembly 7, which includes a gear ring 71 coaxially disposed on the outer wall of the base 11, a gear 72 meshing on the gear ring 71, and a motor 73 connected to the gear 72.

[0042] The motor 73 drives the base 11 to rotate through the meshing of the gear 72 and the gear ring 71 to perform scraping operations.

[0043] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A scraping mechanism, characterized in that: include, The docking assembly (1) includes an annular base (11). Scraper assembly (2), the scraper assembly (2) includes a first scraper (21); A connecting component (3) is used to connect the base (11) and the first scraper (21). The connecting component (3) includes a slide (31) coaxially disposed inside the base (11). The slide (31) is annular. A connecting body (32) is slidably disposed inside the slide (31). The connecting body (32) is connected to the first scraper (21). The connecting component (3) further includes a limiting groove (33) disposed on the side wall of the connecting body (32). The limiting groove (33) passes through both ends of the connecting body (32). A limiting body (34) is fixedly disposed on the inner wall of the slide (31). The limiting body (34) is an elastic body. Along the rotation direction of the base (11), part of the limiting body (34) extends into the limiting groove (33). The part of the limiting body (34) outside the limiting groove (33) is a blocking part. The blocking part can deform and shrink to pass through the limiting groove (33) when subjected to a certain squeezing force.

2. The scraping mechanism according to claim 1, characterized in that: Along the rotation direction of the base (11), the thickness of the limiting body (34) gradually decreases, and the thickness of the limiting body (34) at least in some positions is greater than the depth of the limiting groove (33).

3. The scraping mechanism according to claim 2, characterized in that: A passage (35) is provided between the slide (31) and the inner wall of the base (11). The passage (35) is an annular shape coaxial with the base (11). A connecting part (36) is integrally provided on the side wall of the connecting body (32). The connecting part (36) passes through the passage (35) and is fixed on the first scraper (21). A sealing element (37) is provided at the passage (35). The sealing element (37) includes two sealing rings (371) arranged opposite to each other. The ends of the two sealing rings (371) are fitted together. The sealing rings (371) are elastic elements. The connecting part (36) passes between the two sealing rings (371).

4. The scraping mechanism according to claim 3, characterized in that: The connecting part (36) is a rhomboid shape that gradually narrows from the middle to both ends, and the pointed part of the connecting part (36) is rounded.

5. A coal bunker, characterized in that: Including the scraping mechanism as described in any one of claims 1 to 4, further comprising: The feeding section (4) has a funnel-shaped structure that is larger at the top and smaller at the bottom; The discharge section (5) is a cylindrical structure coaxially arranged at the lower part of the feed section (4); The base (11) is coaxially rotatably disposed between the feeding section (4) and the discharging section (5); Wherein, the lower end of the feeding section (4) is coaxially provided with an annular first mounting groove (41), and the upper end of the base (11) is coaxially provided with an annular first mounting part (111). The first mounting part (111) is axially slidably disposed in the first mounting groove (41). The top surface of the first mounting part (111) and the bottom of the first mounting groove (41) abut against each other. The top surface of the first mounting part (111) and the bottom of the first mounting groove (41) are both undulating wave-like structures. The wave-like structure of the top surface of the first mounting part (111) and the wave-like structure of the bottom of the first mounting groove (41) are adapted to each other.

6. The coal bunker according to claim 5, characterized in that: The lower end of the feeding section (4) is an elastic part (42) located on the side of the first mounting groove (41).

7. The coal bunker according to claim 6, characterized in that: The lower end of the first scraper (21) is connected to the base (11), the upper end of the first scraper (21) extends into the feed section (4), and the first scraper (21) and the feed section (4) are in close contact. The first scraper (21) is provided with a clearance part (211) facing the side wall of the first mounting groove (41). The clearance part (211) is in the shape of a long plate. One end of the clearance part (211) is integrally connected to the first scraper (21). A clearance opening (212) is provided between the clearance part (211) and the first scraper (21). At least one support member (213) is provided in the clearance opening (212). The support member (213) is an elastic member. The first scraper (21) is wrapped with a spacer (214) on the outside of the clearance part (211).

8. The coal bunker according to claim 7, characterized in that: The upper end of the discharge section (5) is coaxially provided with an annular second mounting groove (51), and the lower end of the base (11) is integrally coaxially provided with an annular second mounting part (112). The second mounting part (112) is slidably disposed in the second mounting groove (51). The scraper assembly (2) also includes a second scraper (22). The upper end of the second scraper (22) is fixed to the inner wall of the base (11), and the lower end of the second scraper (22) extends into the discharge section (5). The second scraper (22) and the inner wall of the discharge section (5) are in contact.

9. The coal bunker according to claim 8, characterized in that: A C-shaped frame (6) is provided between the feeding section (4) and the discharging section (5). One end of the C-shaped frame (6) is fixed to the outer wall of the feeding section (4), and the other end of the C-shaped frame (6) is fixed to the outer wall of the discharging section (5). The C-shaped frame (6) has at least a partial elastic section (61).

10. The coal bunker according to claim 9, characterized in that: It also includes a drive assembly (7), which includes a gear ring (71) coaxially disposed on the outer wall of the base (11), a gear (72) meshing on the gear ring (71), and a motor (73) connected to the gear (72).

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