Coal conveying system feed pipe with easy-to-replace liner

Abstract

This utility model relates to a coal conveying system feed pipe with a convenient liner replacement feature. It includes a feed pipe body with an installation hole at the impact position for placing a wear-resistant liner. The wear-resistant liner is movably installed inside an outer plate, the lower end of which is hinged to the feed pipe body. The outer plate is connected to a drive mechanism, which rotates the outer plate along the hinge to allow the wear-resistant liner to be inserted into or removed from the installation hole. This utility model reduces the difficulty of repairing and replacing feed pipes at the impact position, resulting in high efficiency and short replacement time for the wear-resistant liner.

Description

Technical Field

[0001] This utility model relates to the field of coal conveying technology, and in particular to a coal conveying system discharge pipe with easily replaceable liner plates. Background Technology

[0002] In thermal power plants, coal is transported to the boilers in stages via belt conveyors. The belts are connected end-to-end, creating a height difference, and are then connected by a feed pipe for coal transfer. Coal flows through the belts into the feed pipe, impacting the pipe wall at a speed of 2.5 meters per second, creating impact points. These impact points are the primary locations of wear on the feed pipe, necessitating regular repairs of damaged areas. Currently, the feed pipe structure is a single piece; repairs require cutting off the damaged section and welding a new pipe, a time-consuming and labor-intensive process with extremely low efficiency, severely impacting normal operation. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing a coal conveying system discharge pipe with easily replaceable liners.

[0004] This utility model is achieved through the following technical solution: providing a coal conveying system feed pipe with convenient liner replacement, including a feed pipe body, an installation hole for placing a wear-resistant liner is provided at the impact position of the feed pipe body, the wear-resistant liner is movably installed on the inner side of an outer plate, the lower end of the outer plate is hinged to the feed pipe body, the outer plate is connected to a drive mechanism, and the drive mechanism drives the outer plate to rotate along the hinge to allow the wear-resistant liner to be inserted into or removed from the installation hole.

[0005] Preferably, the wear-resistant liner includes a base plate and a grid fixed to the inner side of the base plate, forming a grid groove on the inner side of the wear-resistant liner. After the wear-resistant liner is inserted into the mounting hole, its inner side forms part of the inner wall of the feed pipe. When coal impacts the wear-resistant liner, it will accumulate in the grid groove. Utilizing the principle of "coal against coal," that is, using the friction between materials to reduce wear on the inner wall of the feed pipe, the wear resistance is improved, the service life of the wear-resistant liner is extended, and the frequency of maintenance and replacement is reduced.

[0006] Preferably, the thickness of the base plate is 10mm and the thickness of the grid is 20mm, so that the grid groove can accommodate materials with a thickness of 20mm.

[0007] Preferably, the connection between the wear-resistant liner and the outer plate is specifically achieved by providing a groove on the inner side of the outer plate, and fixing a pulley on the outer side of the bottom plate of the wear-resistant liner. The pulley can slide into the groove from one end and roll within it. A limiting plate for limiting the wear-resistant liner is fixed at the bottom inner side of the outer plate. In actual use, the weight of the material in the mesh groove and the self-weight of the wear-resistant liner prevent it from moving upwards. The limiting plate can vertically limit the wear-resistant liner. In this embodiment, there are two sets of grooves and pulleys. On the one hand, the cooperation between the pulleys and grooves facilitates the installation and removal of the wear-resistant liner on the outer plate. On the other hand, the grooves and pulleys can laterally limit the wear-resistant liner.

[0008] Preferably, connecting side plates are fixed on both sides of the outer plate, and each connecting side plate is connected to the main body of the discharge tube through a connector, thereby stably fixing the outer plate to the main body of the discharge tube through the connector.

[0009] Preferably, the connector includes a connecting ear plate fixed to the connecting side plate and a fixing ear plate fixed to the material discharge pipe body. Fixing bolts are connected to the connecting ear plate and the fixing ear plate. Each connecting side plate is connected to the material discharge pipe body through at least two sets of connectors. After the connecting side plate and the material discharge pipe body are connected, the outer plate and the wear-resistant inner liner are fixed in position, and the material conveying operation can be carried out normally.

[0010] Preferably, the drive mechanism includes a rotating shaft, a drive motor for driving the rotating shaft to rotate, and a take-up and release reel mounted on the rotating shaft and coaxial with the rotating shaft. There are two take-up and release reels, which are respectively fixed at both ends of the rotating shaft. Each take-up and release reel is wound with a traction chain. One end of the traction chain is fixed to the take-up and release reel, and the other end of the traction chain is fixed to the connecting side plate on the corresponding side.

[0011] Preferably, the rotating shaft is mounted on the main body of the discharge pipe via a bearing seat.

[0012] Preferably, the output shaft of the drive motor is connected to the rotating shaft via a chain drive assembly. The chain drive assembly includes a driving sprocket, a driven sprocket, and a chain connecting the driving sprocket and the driven sprocket.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The structural design of the wear-resistant inner liner of this utility model can reduce the wear on the inner wall of the feed pipe by utilizing the friction between materials, thereby improving wear resistance, greatly extending the service life of the impact position of the feed pipe, and reducing the number of times the feed pipe needs to be repaired and replaced.

[0015] 2. The connection method between the wear-resistant inner liner and the outer plate of this utility model, along with the structural design of the drive mechanism, makes the installation and disassembly of the wear-resistant inner liner simple and easy, reduces the difficulty of maintenance and replacement of the impact position of the feed pipe, makes the replacement of the wear-resistant inner liner efficient and quick, and ensures normal operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the A-direction structure;

[0018] Figure 3 This is a schematic diagram of the wear-resistant inner liner and outer plate of this utility model;

[0019] Figure 4 This is a schematic diagram of the outer panel of this utility model;

[0020] As shown in the figure:

[0021] 1. Material discharge pipe body, 2. Wear-resistant inner lining, 3. Outer plate, 4. Slide groove, 5. Limiting plate, 6. Connecting side plate, 7. Connecting piece, 8. Rotating shaft, 9. Drive motor, 10. Take-up and unload tray, 11. Traction chain, 12. Bearing seat, 13. Chain drive assembly, 21. Base plate, 22. Mesh grid. Detailed Implementation

[0022] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0023] like Figure 1-4 As shown, this utility model includes a material discharge tube body 1, with an installation hole for placing a wear-resistant inner liner 2 at the impact position of the material discharge tube body 1. The wear-resistant inner liner 2 is movably installed inside the outer plate 3. The lower end of the outer plate 3 is hinged to the material discharge tube body 1. The outer plate 3 is connected to a driving mechanism. The driving mechanism drives the outer plate 3 to rotate along the hinge, which can cause the wear-resistant inner liner 2 to be placed into or removed from the installation hole.

[0024] The wear-resistant liner 2 includes a base plate 21 and a mesh grid 22 fixed inside the base plate 21, forming a mesh groove on the inner side of the wear-resistant liner 2. After the wear-resistant liner 2 is inserted into the mounting hole, its inner side forms part of the inner wall of the material discharge pipe. When coal impacts the wear-resistant liner 2, it will accumulate in the mesh groove. Utilizing the principle of "coal against coal," that is, using the friction between materials to reduce wear on the inner wall of the material discharge pipe, the wear resistance is improved, the service life of the wear-resistant liner 2 is extended, and the frequency of maintenance and replacement is reduced. In this embodiment, the thickness of the base plate 21 is 10mm, and the thickness of the mesh grid 22 is 20mm, so that the mesh groove can accommodate materials with a thickness of 20mm.

[0025] The connection between the wear-resistant inner liner 2 and the outer plate 3 is specifically achieved by providing a groove 4 on the inner side of the outer plate 3, and fixing a pulley on the outer side of the bottom plate 21 of the wear-resistant inner liner 2. The pulley can slide into the groove 4 from one end and roll within the groove 4. A limiting plate 5 is fixed at the bottom inner side of the outer plate 3 to limit the position of the wear-resistant inner liner 2. In actual use, the weight of the material in the mesh groove and the weight of the wear-resistant inner liner 2 itself prevent the wear-resistant inner liner 2 from moving upwards, and the limiting plate 5 can vertically limit the wear-resistant inner liner 2. In this embodiment, there are two sets of grooves 4 and pulleys. On the one hand, the cooperation between the pulleys and grooves 4 facilitates the installation and removal of the wear-resistant liner on the outer plate 3. On the other hand, the grooves 4 and pulleys can limit the lateral position of the wear-resistant inner liner 2.

[0026] In this embodiment, connecting side plates 6 are fixed to both sides of the outer plate 3. Each connecting side plate 6 is connected to the material discharge pipe body 1 via a connector 7, thus stably fixing the outer plate 3 to the material discharge pipe body 1. The connector 7 includes a connecting ear plate fixed to the connecting side plate 6 and a fixing ear plate fixed to the material discharge pipe body 1. Fixing bolts are connected to the connecting ear plate and the fixing ear plate. Each connecting side plate 6 is connected to the material discharge pipe body 1 via at least two sets of connectors 7. After the connecting side plates 6 and the material discharge pipe body 1 are connected, the outer plate 3 and the wear-resistant inner liner 2 are fixed in position, allowing for normal material conveying.

[0027] The driving mechanism includes a rotating shaft 8, a drive motor 9 that drives the rotating shaft 8 to rotate, and two take-up and drop-off reels 10 mounted on and coaxial with the rotating shaft 8. The two reels 10 are fixed to both ends of the rotating shaft 8, and each reel 10 has a traction chain 11 wound around it. One end of the traction chain 11 is fixed to the reel 10, and the other end is fixed to the corresponding connecting side plate 6. The rotating shaft 8 is mounted on the material drop tube body 1 via a bearing seat 12. The output shaft of the drive motor 9 is connected to the rotating shaft 8 via a chain drive assembly 13. The chain drive assembly 13 includes a driving sprocket, a driven sprocket, and a chain connecting the driving sprocket and the driven sprocket. The structure and working principle of the chain drive assembly 13, as well as the connection method between the drive motor 9 and the rotating shaft 8 via the chain drive assembly 13, are existing technologies and will not be described further here. The drive motor 9 is mounted on the outer wall of the material drop tube body 1 via a support.

[0028] When the wear-resistant liner 2 needs to be replaced, first remove the fixing bolts to disconnect the connection between the connecting side plate 6 and the main body 1 of the discharge pipe. Control the drive motor 9 to rotate so that the traction chain 11 is gradually lowered from the take-up and release tray 10. As the traction chain 11 is lowered, the outer plate 3, carrying the wear-resistant liner 2, rotates outward along the hinge point under its own weight until the wear-resistant liner 2 is exposed. At this point, turn off the drive motor 9, and the worker removes the wear-resistant liner 2 from the outer plate 3 and replaces it with a new wear-resistant liner 2. Then, control the drive motor 9 to reverse, and the traction chain 11 is continuously retracted onto the take-up and release tray 10. The outer plate 3, carrying the new wear-resistant liner 2, rotates inward until the wear-resistant liner 2 enters the mounting hole. Turn off the drive motor 9, and fix the connecting side plate 6 and the main body 1 of the discharge pipe with the fixing bolts to complete the disassembly and installation of the wear-resistant liner 2. The entire operation process is simple and easy to perform, with low labor intensity and high work efficiency. The traction chain 11 restrains the position of the outer plate 3 and the wear-resistant liner 2, resulting in a high safety factor.

[0029] The structural design of this wear-resistant liner 2 utilizes the friction between materials to reduce wear on the inner wall of the discharge pipe, improving wear resistance and significantly extending the lifespan of the impact points of the discharge pipe, thus reducing the frequency of maintenance and replacement. The connection method between the wear-resistant liner 2 and the outer plate 3, along with the structural design of the drive mechanism, makes the installation and disassembly of the wear-resistant liner 2 simple and easy, reducing the difficulty of maintenance and replacement of the impact points of the discharge pipe, making the replacement of the wear-resistant liner 2 efficient and quick, and ensuring normal operation.

[0030] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A coal handling system drop tube with easy change of liner characterized in that: The device includes a material discharge tube body, with an installation hole for placing a wear-resistant liner at the impact position of the material discharge tube body. The wear-resistant liner is movably installed on the inner side of the outer plate. The lower end of the outer plate is hinged to the material discharge tube body. The outer plate is connected to a drive mechanism. The drive mechanism drives the outer plate to rotate along the hinge, which allows the wear-resistant liner to be placed into or removed from the installation hole.

2. The coal conveying system feed pipe with easily replaceable liner as described in claim 1, characterized in that: The wear-resistant liner includes a base plate and a grid fixed to the inside of the base plate, forming a grid groove on the inside of the wear-resistant liner.

3. The coal conveying system feed pipe with easily replaceable liner as described in claim 1, characterized in that: The connection method between the wear-resistant liner and the outer plate is as follows: a groove is provided on the inner side of the outer plate, and a pulley is fixed on the outer side of the bottom plate of the wear-resistant liner. The pulley can slide into the groove from one end and roll in the groove. A limiting plate for limiting the wear-resistant liner is fixed at the bottom of the inner side of the outer plate.

4. The coal conveying system feed pipe with easily replaceable liner as described in claim 1, characterized in that: Connecting side plates are fixed on both sides of the outer plate, and each connecting side plate is connected to the main body of the material drop tube through a connector.

5. The coal conveying system feed pipe with easily replaceable liner plates according to claim 4, characterized in that: The connector includes a connecting ear plate fixed on the connecting side plate and a fixing ear plate fixed on the main body of the discharge pipe. Fixing bolts are connected to the connecting ear plate and the fixing ear plate. Each connecting side plate is connected to the main body of the discharge pipe through at least two sets of connectors.

6. The coal conveying system feed pipe with easily replaceable liner as described in claim 4, characterized in that: The drive mechanism includes a rotating shaft, a drive motor for driving the rotating shaft to rotate, and a take-up and release reel mounted on the rotating shaft and coaxial with the rotating shaft. There are two take-up and release reels, which are respectively fixed at both ends of the rotating shaft. Each take-up and release reel is wound with a traction chain. One end of the traction chain is fixed to the take-up and release reel, and the other end of the traction chain is fixed to the connecting side plate on the corresponding side.

7. The coal conveying system feed pipe with easily replaceable liner as described in claim 6, characterized in that: The rotating shaft is mounted on the main body of the discharge pipe via a bearing seat.

8. The coal conveying system feed pipe with easily replaceable liner as described in claim 6, characterized in that: The output shaft of the drive motor is connected to the rotating shaft via a chain drive assembly.

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