Material cleaning mechanism based on boiler coal feeding device

Abstract

The utility model discloses a kind of material cleaning mechanism based on boiler coal feeder, including conveying trough body (1), conveying screw conveyor (2) is equipped in conveying trough body (1), U-shaped lining plate (3) is equipped in conveying trough body (1), the outer wall of lining plate (3) and the inner wall of conveying trough body (1) mutually adhere to each other, the both ends of lining plate (3) vertically extend to the inner wall upper end of conveying trough body (1) and are connected with pressure receiving part (301), the interlocking groove is formed between pressure receiving part (301) and lining plate (3), the top of conveying trough body (1) is detachably connected with fixed part (4), the both sides of fixed part (4) are equipped with the pressing plate (401) that adheres to the inner wall of conveying trough body (1), the lower end of pressing plate (401) extends into interlocking groove and with the upper end face of pressure receiving part (301) mutually adhere to each other.The utility model can improve the removal efficiency of accumulated coal, and guarantee the stability of conveying trough body after long-term use.

Description

Technical Field

[0001] This utility model relates to a boiler coal feeding device, and more particularly to a material cleaning mechanism based on the boiler coal feeding device. Background Technology

[0002] Current thermal power plants use auger conveyors to transport coal. However, because coal becomes sticky when wet, it adheres to the bottom of the conveyor trough during transport. When coal adheres to the bottom of the trough, the subsequent spiral conveying action of the auger applies downward pressure, compacting the coal and making it adhere tightly to the trough, thus increasing the bond strength between the coal and the trough. As this coal hardens into lumps, subsequent coal adheres to the surface of these lumps in the same way, causing the coal lumps at the bottom of the trough to accumulate. When the coal lumps accumulate to the point of interfering with the auger, the edges of the auger will be obstructed by the coal, causing localized deformation. If the overlap between the coal lumps and the auger is too large, the auger may break at the contact point, affecting the conveying stability of the auger conveyor.

[0003] To address the aforementioned issues, the current solution employed by manufacturers involves operators periodically inspecting the conveyor auger's condition. When coal accumulation at the bottom reaches a certain height, an electric pick is used to drill and break up the coal until it no longer obstructs the auger's normal rotation in the short term. However, this approach has several drawbacks. Firstly, because this coal block is located directly below or to the side of the auger, the drilling process is obstructed by the auger, increasing the difficulty of removal and posing a risk of damaging the auger. In severe cases, the entire auger may need to be dismantled for cleaning, significantly increasing the workload. Secondly, the drilling process can easily create pits on the inner wall of the conveyor trough, resulting in a pockmarked surface after prolonged use. This further accelerates the accumulation of coal, requiring more frequent removal of the accumulated coal.

[0004] Therefore, existing screw conveyors used in boilers have the problem of difficulty in cleaning up accumulated coal. Utility Model Content

[0005] The purpose of this invention is to provide a material cleaning mechanism based on a boiler coal feeding device. It can improve the efficiency of removing accumulated coal and ensure the stability of the conveying trough after long-term use.

[0006] The technical solution of this utility model is as follows: a material cleaning mechanism based on a boiler coal feeding device includes a conveying trough, a conveying auger inside the conveying trough, a U-shaped liner inside the conveying trough, the outer wall of the liner being in contact with the inner wall of the conveying trough, both ends of the liner extending vertically upward to the upper end of the inner wall of the conveying trough and connected to a pressure receiving part, a fastening groove being formed between the pressure receiving part and the liner, a fixing member being detachably connected to the top of the conveying trough, and pressing plates being provided on both sides of the fixing member to fit against the inner wall of the conveying trough, the lower end of the pressing plate extending into the fastening groove and fitting against the upper end surface of the pressure receiving part.

[0007] In the aforementioned material cleaning mechanism based on the boiler coal feeding device, the bottom of the conveying trough is provided with a U-shaped mounting groove, the liner is fastened and connected in the mounting groove, and the extension of the pressure-bearing part extends to the mounting groove and is connected to the pressing plate.

[0008] In the aforementioned material cleaning mechanism based on the boiler coal feeding device, the top two sides of the conveying trough form installation steps, the fixing component includes a rectangular frame, the two ends of the rectangular frame are connected to the installation steps by the first bolt, the bottom of the rectangular frame is fixedly connected to the pressing plate, and the pressing plates on both sides are connected to each other by reinforcing ribs.

[0009] In the aforementioned material cleaning mechanism based on the boiler coal feeding device, the top of the fixing member is connected to a cover plate, and the cover plate and the fixing member are connected together by a first bolt to install a step.

[0010] In the aforementioned material cleaning mechanism based on the boiler coal feeding device, the cover plate has U-shaped openings on both sides, and the rectangular frame has mounting holes located in the U-shaped openings on both sides. A second bolt is connected in the mounting hole, and the end of the second bolt passes through the rectangular frame and is bolted to the mounting step.

[0011] In the aforementioned cleaning mechanism based on the boiler coal feeding device, the liner is made of stainless steel plate bent inward, and the two ends of the liner are bent inward to form an upwardly inclined pressure part.

[0012] In the aforementioned cleaning mechanism based on the boiler coal feeding device, there are multiple liners arranged side by side in the conveying trough, with adjacent liners fitting together.

[0013] Compared with the prior art, this utility model has the following characteristics: (1) This utility model uses a liner plate installed in the conveying trough to convey coal as the inner wall of the conveying trough. When the coal accumulates to a certain height at the bottom of the liner plate, the operator can remove and replace the entire liner plate. This effectively reduces the workload and working time of the operator compared to the existing method of drilling coal with an electric pick, and ensures the stability of the conveying trough after long-term use. (2) Through the structural cooperation of the fastener and the liner, the fastener can squeeze and limit the liner after installation. On the one hand, it ensures that the liner is completely attached to the inner wall of the conveying trough after installation, preventing unevenness between adjacent liners at the connection. On the other hand, it can also fix the liner during use, preventing the liner from arching or loosening under stress. At the same time, since the liner does not need to be connected to the conveying trough by countersunk screws in this state, it will not have the problem of screws rusting and getting stuck or screws being blocked by external coal blocks and unable to be screwed out normally during subsequent use, thus improving the stability of the liner's disassembly, assembly and replacement. (3) Through the structural cooperation of the fastener and the cover plate, on the one hand, the fastener and the cover plate can be bolted together to the top of the conveying trough, ensuring the normal disassembly and assembly of the cover plate; on the other hand, when the operator conducts regular inspections, the cover plate can be removed separately to observe the working status of the conveying trough, and the fastener will not loosen or fall off, thus ensuring the positioning effect of the liner plate. Therefore, this invention can improve the efficiency of removing accumulated coal and ensure the stability of the conveying trough after long-term use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of Example 1; Figure 2 yes Figure 1 A magnified view from direction A; Figure 3 yes Figure 1 A magnified view from direction B; Figure 4 This is a top view of Embodiment 1; Figure 5 This is a structural schematic diagram of Example 2; Figure 6 yes Figure 5 A magnified view along line C.

[0015] The markings in the attached diagram are as follows: 1-Conveying trough, 2-Conveying auger, 3-Liner, 4-Fixed component, 5-First bolt, 6-Cover plate, 7-Second bolt, 101-Mounting groove, 102-Mounting step, 301-Pressure-bearing part, 401-Pressing plate, 402-Rectangular frame, 403-Reinforcing rib. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0017] Example 1. The material cleaning mechanism based on the boiler coal feeding device is configured as follows: Figure 1-4As shown, the device includes a conveying trough 1, a conveying auger 2 inside the conveying trough 1, both ends of the conveying auger 2 being rotatably connected to the conveying trough 1, and one end of the conveying auger 2 passing through the conveying trough 1 and connected to a drive motor. The conveying trough 1 is provided with a U-shaped liner 3, the outer wall of the liner 3 being in contact with the inner wall of the conveying trough 1, and both ends of the liner 3 extending vertically upward to the upper end of the inner wall of the conveying trough 1 and connected to a pressure receiving part 301. A fastening groove is formed between the pressure receiving part 301 and the liner 3. A fixing member 4 is detachably connected to the top of the conveying trough 1, and pressing plates 401 that fit against the inner wall of the conveying trough 1 are provided on both sides of the fixing member 4. The lower end of the pressing plate 401 extends into the fastening groove and fits against the upper end surface of the pressure receiving part 301.

[0018] The bottom of the conveying trough 1 is provided with a U-shaped mounting groove 101. The liner 3 is fastened and connected in the mounting groove 101. The top height of both ends of the mounting groove 101 is higher than the height of both ends of the liner 3. The extension of the pressure-bearing part 301 extends to the mounting groove 101 and is connected to the pressing plate 401.

[0019] The top two sides of the conveying trough 1 form mounting steps 102. The fixing member 4 includes a rectangular frame 402. The two ends of the rectangular frame 402 are connected to the mounting steps 102 by the first bolt 5. The bottom of the rectangular frame 402 is fixedly connected to the pressing plate 401. The pressing plates 401 on both sides are connected to each other by reinforcing ribs 403.

[0020] The top of the fastener 4 is connected to the cover plate 6, and the cover plate 6 and the fastener 4 are connected together by the first bolt 5 to install the step 102.

[0021] The cover plate 6 has U-shaped openings on both sides, and the rectangular frame 402 has mounting holes located in the U-shaped openings on both sides. A second bolt 7 is connected in the mounting hole, and the end of the second bolt 7 passes through the rectangular frame 402 and is bolted to the mounting step 102.

[0022] The liner 3 is made of stainless steel plate bent inward. Both ends of the liner 3 are bent inward to form an upwardly inclined pressure-bearing part 301. An angle of 30 to 45° is formed between the pressure-bearing part 301 and the liner 3.

[0023] The number of pressure-bearing parts 301 is multiple and they are distributed at intervals at both ends of the liner plate 3.

[0024] The number of liners 3 is multiple and they are arranged side by side in the conveying trough 1, with adjacent liners 3 fitting together.

[0025] In this embodiment, during installation, the liner 3 is first inserted into the mounting groove 101 through the gap between the conveying auger 2 and the conveying trough 1. Then, the fastener 4 is fastened to the top of the conveying trough 1, and the fastener 4, after installation, presses the liner 3 with the pressing plate 401, causing the liner 3 to adhere tightly to the inner wall of the conveying trough 1 under the pressure. When the liner 3 is fully adhered, the pressing force of the pressing plate 401 will cause the pressure-bearing part 301 to bend downward, thus preventing the liner 3 from arching under pressure. After the fastener 4 is installed in place, the operator first fixes the rectangular frame 402 to the mounting step 102 with the second bolt 7, ensuring the positional stability of the liner 3 after the fastener 4 is fixed. Then, the cover plate 6 is fixed to the fastener 4 with the first bolt 5, thereby using the cover plate 6 to cover the conveying trough 1.

[0026] During daily use of the auger conveyor, operators can disassemble the cover plate 6 separately and observe the working status of the liner plate 3. When the height of the coal lumps accumulated on the surface of the liner plate 3 is close to that of the conveying auger 2, operators can remove the liner plate 3 from the conveying trough 1 in the same manner and replace it separately.

[0027] Example 2. The material cleaning mechanism based on the boiler coal feeding device is configured as follows: Figure 5-6 As shown, the device includes a conveying trough 1, a conveying auger 2 inside the conveying trough 1, both ends of the conveying auger 2 being rotatably connected to the conveying trough 1, and one end of the conveying auger 2 passing through the conveying trough 1 and connected to a drive motor. The conveying trough 1 is provided with a U-shaped liner 3, the outer wall of the liner 3 being in contact with the inner wall of the conveying trough 1, and both ends of the liner 3 extending vertically upward to the upper end of the inner wall of the conveying trough 1 and connected to a pressure receiving part 301. A fastening groove is formed between the pressure receiving part 301 and the liner 3. A fixing member 4 is detachably connected to the top of the conveying trough 1, and pressing plates 401 that fit against the inner wall of the conveying trough 1 are provided on both sides of the fixing member 4. The lower end of the pressing plate 401 extends into the fastening groove and fits against the upper end surface of the pressure receiving part 301.

[0028] The pressing plate 401 is attached to the inner wall of the conveying trough 1. A pressure plate is welded to the bottom of the pressing plate 401. The pressing plate 401 and the pressure plate are arranged side by side and partially overlap. The lower end of the pressure plate extends to the bottom of the pressing plate 401 and is attached to the pressure-bearing part 301. There is a gap between the pressing plate 401 and the liner 3. The pressure plates of adjacent fixing parts 4 are attached to each other.

[0029] The top two sides of the conveying trough 1 form mounting steps 102. The fixing member 4 includes a rectangular frame 402. The two ends of the rectangular frame 402 are connected to the mounting steps 102 by the first bolt 5. The bottom of the rectangular frame 402 is fixedly connected to the pressing plate 401. The pressing plates 401 on both sides are connected to each other by reinforcing ribs 403.

[0030] The top of the fastener 4 is connected to the cover plate 6, and the cover plate 6 and the fastener 4 are connected together by the first bolt 5 to install the step 102.

[0031] The cover plate 6 has U-shaped openings on both sides, and the rectangular frame 402 has mounting holes located in the U-shaped openings on both sides. A second bolt 7 is connected in the mounting hole, and the end of the second bolt 7 passes through the rectangular frame 402 and is bolted to the mounting step 102.

[0032] The liner 3 is made of stainless steel plate bent inward. Both ends of the liner 3 are bent inward to form an upwardly inclined pressure-bearing part 301. An angle of 30 to 45° is formed between the pressure-bearing part 301 and the liner 3.

[0033] The pressure-bearing part is elongated and located at the middle of both ends of the liner 3.

[0034] The number of liners 3 is multiple and they are arranged side by side in the conveying trough 1, with adjacent liners 3 fitting together.

[0035] Compared with Embodiment 1, this embodiment removes the mounting groove 101 opened at the bottom of the conveying trough 1, and through the cooperation of the liner 3 and the fastener 4, the liner 3 is completely attached to the inner wall of the conveying trough 1 after installation, ensuring the stability of the liner 3 in use.

Claims

1. A material cleaning mechanism based on a boiler coal feeding device, comprising a conveying trough (1), wherein a conveying auger (2) is provided inside the conveying trough (1), characterized in that: The conveying trough (1) is provided with a U-shaped liner (3). The outer wall of the liner (3) is in contact with the inner wall of the conveying trough (1). The two ends of the liner (3) extend vertically upward to the upper end of the inner wall of the conveying trough (1) and are connected to a pressure receiving part (301). A fastening groove is formed between the pressure receiving part (301) and the liner (3). The top of the conveying trough (1) is detachably connected to a fixing member (4). The two sides of the fixing member (4) are provided with pressing plates (401) that fit against the inner wall of the conveying trough (1). The lower end of the pressing plate (401) extends into the fastening groove and fits against the upper end face of the pressure receiving part (301).

2. The material cleaning mechanism based on the boiler coal feeding device according to claim 1, characterized in that: The bottom of the conveying trough (1) is provided with a U-shaped mounting groove (101), the liner (3) is fastened and connected in the mounting groove (101), and the extension of the pressure part (301) extends to the mounting groove (101) and is connected to the pressing plate (401).

3. The material cleaning mechanism based on the boiler coal feeding device according to claim 1, characterized in that: The top two sides of the conveying trough (1) form installation steps (102). The fastener (4) includes a rectangular frame (402). The two ends of the rectangular frame (402) are connected to the installation steps (102) by the first bolt (5). The bottom of the rectangular frame (402) is fixedly connected to the pressing plate (401). The pressing plates (401) on both sides are connected to each other by reinforcing ribs (403).

4. The material cleaning mechanism based on the boiler coal feeding device according to claim 3, characterized in that: The top of the fastener (4) is connected to the cover plate (6), and the cover plate (6) and the fastener (4) are connected together by the first bolt (5) to install the step (102).

5. The material cleaning mechanism based on the boiler coal feeding device according to claim 4, characterized in that: The cover plate (6) has U-shaped openings on both sides, and the rectangular frame (402) has mounting holes located in the U-shaped openings on both sides. A second bolt (7) is connected in the mounting hole, and the end of the second bolt (7) passes through the rectangular frame (402) and is bolted to the mounting step (102).

6. The material cleaning mechanism based on the boiler coal feeding device according to claim 1, characterized in that: The liner (3) is made of stainless steel plate bent inward, and the two ends of the liner (3) are bent inward to form an upwardly inclined pressure part (301).

7. The material cleaning mechanism based on the boiler coal feeding device according to claim 1, characterized in that: The number of the liners (3) is multiple and they are arranged side by side in the conveying trough (1), with adjacent liners (3) fitting together.

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