A flight assembly for a coal mill

Abstract

The utility model discloses a scraper subassembly for coal mill, including the drive seat of fixed in two drive arm bottom end, the scraper fixed seat of activity setting in the bottom of drive seat, the coal scraper of fixed installation in the inboard of scraper fixed seat and bottom end and stretch out to the bottom of scraper fixed seat, and set up the elastic activity subassembly between the guide base plate and drive seat, the coal scraper is designed as elastic activity type through this application, has broken through the limitation of traditional fixed type coal scraper, in actual use, this elastic activity type coal scraper can guarantee the stable adhesion of bottom end and below material groove with its elastic structure, and simultaneously, when encountering the protruding and other foreign matters, the coal scraper can adaptively move to a certain extent, reduces the direct impact and friction with foreign matters, thereby reduces the wear and tear degree, significantly prolongs the service life of coal scraper, reduces the frequency of replacement and maintenance, reduces the production cost, prolongs the maintenance cycle of equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal scraper for coal mills, and specifically relates to a scraper assembly for coal mills. Background Technology

[0002] In industries such as thermal power generation and steel smelting, coal mills are key pulverizing equipment. Their function is to crush and grind raw coal into pulverized coal that meets the requirements for subsequent combustion. The operating efficiency and stability of the coal mill directly affect the energy consumption and product quality of the entire production system. During the operation of the coal mill, the coal scraper, as an important auxiliary component, plays an indispensable role. It is usually installed under the drive arm inside the coal mill. Its main function is to scrape up the raw coal accumulated in the feed trough and transport it to the grinding area, ensuring that the raw coal can continuously and evenly enter the grinding components, thereby achieving a highly efficient pulverizing process.

[0003] Traditional coal scrapers mostly adopt a fixed design, meaning the scraper is rigidly connected and fixed below the drive arm, and its height remains basically unchanged after installation. However, in actual operation, this fixed coal scraper has revealed many problems:

[0004] On the one hand, due to the complex working environment inside the coal mill, the surface of the feed trough is often uneven and may contain foreign objects such as protrusions and depressions. During the coal scraping process, the fixed coal scraper cannot move up and down, and the degree of contact between its bottom end and the surface of the feed trough will be severely affected by the flatness of the feed trough. When encountering protrusions on the surface of the feed trough, the coal scraper will encounter greater resistance, making it difficult to scrape coal, and may even result in incomplete coal scraping, affecting the pulverizing efficiency and product quality of the coal mill.

[0005] On the other hand, under the continuous action of greater resistance, the friction between the coal scraper and the feed trough will increase significantly, thereby accelerating the wear of the coal scraper. Especially when encountering hard foreign objects, the coal scraper may be damaged due to excessive wear, requiring frequent replacement and maintenance. This not only increases production costs but also affects the normal operation of the coal mill and shortens the equipment maintenance cycle.

[0006] Therefore, this utility model proposes a scraper assembly for a coal mill. Utility Model Content

[0007] The purpose of this invention is to provide a scraper assembly for a coal mill to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a scraper assembly for a coal mill, comprising a drive seat fixed to the bottom ends of two drive arms, a scraper fixing seat movably disposed at the bottom of the drive seat, a coal scraper fixedly installed inside the scraper fixing seat with its bottom end extending to the bottom of the scraper fixing seat, and further comprising...

[0009] Two guide posts are symmetrically fixed on the top surface of the scraper fixing seat, and the top ends of the two guide posts extend to the top of the drive seat. The top of the drive seat is also provided with a guide base plate fixed to the two guide posts.

[0010] And an elastic movable component disposed between the guide base plate and the drive seat, the elastic movable component including a movable column fixed at the bottom center of the guide base plate, the bottom end of the movable column extending through to the bottom of the drive seat and fixed with a movable base plate, and a spring sleeved on the surface of the movable column relative to the movable base plate and the drive seat.

[0011] Preferably, the bottom cross-section of the coal scraper is semi-circular.

[0012] Preferably, the scraper fixing seat is inverted U-shaped in side view, and the top of the coal scraper is fixed to the inner side of the scraper fixing seat by multiple bolts.

[0013] Preferably, the center of the drive seat has a through hole for the movable column to pass through smoothly.

[0014] Preferably, the bottom end of the spring abuts against the top surface of the movable base plate, and the top end of the spring abuts against the bottom surface of the drive seat.

[0015] Preferably, it also includes a follow-up protective cover structure, which is disposed at the bottom of the drive seat.

[0016] Preferably, the follow-up protective cover structure includes a rubber protective base plate installed on the bottom surface of the movable base plate, a rubber protective cylinder glued to the top surface of the rubber protective base plate and covering the bottom end of the movable column, the movable base plate and the spring inside, and an annular bottom groove opened on the bottom surface of the drive seat for the rubber protective cylinder to move, and the top end of the rubber protective cylinder is movably located in the annular bottom groove.

[0017] Preferably, the inner and outer walls of the top of the rubber protective cylinder are provided with an integral annular elastic protrusion, and the annular elastic protrusion fits against the inner wall of the annular bottom groove. A T-shaped bottom bracket is fixed to the bottom surface of the movable bottom plate. A circular card hole is provided through the center of the rubber protective bottom plate for the T-shaped bottom bracket to pass through. The bottom end of the T-shaped bottom bracket passes through the circular card hole to the bottom of the rubber protective bottom plate.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: The scraper assembly for a coal mill of this application, by designing the coal scraper as elastically movable, breaks through the limitations of traditional fixed coal scrapers. In actual use, this elastically movable coal scraper can ensure stable contact between its bottom end and the lower feed trough due to its elastic structure, ensuring the continuity and uniformity of the coal scraping process, effectively improving coal scraping efficiency and avoiding the problem of incomplete coal scraping. Simultaneously, when encountering protrusions or other foreign objects, the coal scraper can adaptively move upwards to a certain extent, reducing direct impact and friction with the foreign objects. This reduces wear and tear, significantly extends the service life of the coal scraper, reduces the frequency of replacement and maintenance, lowers production costs, and extends the equipment maintenance cycle. Furthermore, this coal scraper features an innovative follow-up protective cover that dynamically adjusts its position with the movement of the scraper, effectively protecting the elastic moving components and preventing impurities such as coal dust and ash from entering. This ensures the stability of the coal scraper in complex working environments, further improving the reliability and operating efficiency of the equipment, and providing a strong guarantee for the efficient and stable operation of the coal mill. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 This utility model Figure 2 A magnified view of a portion of region A in the middle;

[0022] Figure 4 This utility model Figure 2 A magnified view of a portion of region B in the middle;

[0023] In the diagram: 1. Drive seat; 11. Central perforation; 2. Drive arm; 3. Scraper fixing seat; 4. Coal scraper; 5. Guide column; 6. Guide base plate; 7. Elastic movable component; 71. Movable column; 72. Movable base plate; 721. T-shaped bottom bracket; 73. Spring; 81. Rubber protective cylinder; 811. Annular elastic protrusion; 82. Rubber protective base plate; 821. Circular locking hole; 83. Annular bottom groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Please see Figures 1 to 3 This is the first embodiment of the present invention, which provides the following technical solution: a scraper assembly for a coal mill, comprising a drive seat 1 fixed to the bottom of two drive arms 2, a scraper fixing seat 3 movably disposed at the bottom of the drive seat 1, and a coal scraper 4 fixedly installed inside the scraper fixing seat 3 with its bottom end extending to the bottom of the scraper fixing seat 3, and further comprising...

[0027] Two guide posts 5 are symmetrically welded and fixed on the top surface of the scraper fixing seat 3, and the top ends of the two guide posts 5 extend to the top of the drive seat 1. The top of the drive seat 1 is also provided with a guide plate 6 fixed to the two guide posts 5. The guide posts 5 can play a guiding and supporting role when the scraper fixing seat 3 moves up and down in the future.

[0028] And an elastic movable component 7 is disposed between the guide base plate 6 and the drive seat 1. The elastic movable component 7 can realize the elastic up and down movement of the guide column 5, the scraper fixing seat 3 and the coal scraper 4. The elastic movable component 7 includes a movable column 71 fixed at the bottom center of the guide base plate 6, and the bottom end of the movable column 71 extends through to the bottom of the drive seat 1 and is fixed with a movable base plate 72. A spring 73 is sleeved between the bottom end surface of the movable column 71 and the movable base plate 72 and the drive seat 1. Under the pushing of the spring 73, the movable column 71 can move up and down during daily use. The moving base plate 72 is constantly subjected to downward pressure, so that the guide plate 6, guide column 5, scraper fixing seat 3 and coal scraper 4 are all subjected to the elastic downward pressure of spring 73, ensuring that the bottom end of the coal scraper 4 can be stably attached to the inner wall of the coal mill hopper. When the coal scraper 4 encounters foreign objects during subsequent coal scraping, the coal scraper 4, scraper fixing seat 3, guide column 5 and guide plate 6 can move upward to a certain extent. This elastic movable design reduces the direct hard impact and friction between the coal scraper 4 and foreign objects, thereby reducing the degree of wear.

[0029] In this embodiment, preferably, the bottom cross-section of the coal scraper 4 is semi-circular, so that the arc surface at the bottom of the coal scraper 4 can generate an upward component force when subjected to horizontal extrusion force, so that the coal scraper 4 can smoothly and adaptively move upward slightly when it encounters foreign object extrusion during subsequent operation.

[0030] In this embodiment, preferably, the scraper fixing seat 3 is inverted U-shaped when viewed from the side, and the top of the coal scraper 4 is fixed to the inner side of the scraper fixing seat 3 by multiple bolts.

[0031] In this embodiment, preferably, a central through hole 11 is provided at the center of the drive seat 1 so that the movable column 71 can pass through smoothly, and can then move up and down smoothly.

[0032] In this embodiment, preferably, the bottom end of the spring 73 abuts against the top surface of the movable base plate 72, and the top end of the spring 73 abuts against the bottom surface of the drive seat 1.

[0033] In this embodiment, preferably, a follow-up protective cover structure is also included, which is disposed at the bottom of the drive seat 1.

[0034] In this embodiment, preferably, the follow-up protective cover structure includes a rubber protective base plate 82 installed on the bottom surface of the movable base plate 72, a rubber protective cylinder 81 glued and fixed to the top surface of the rubber protective base plate 82 and covering the bottom end of the movable column 71, the movable base plate 72 and the spring 73 inside, and an annular bottom groove 83 opened on the bottom surface of the drive seat 1 for the rubber protective cylinder 81 to move. The top end of the rubber protective cylinder 81 is movably located in the annular bottom groove 83. Both the rubber protective cylinder 81 and the rubber protective base plate 82 are made of rubber material, and will undergo elastic deformation when squeezed. Under the effective protection of the protective sleeve 81, the movable column 71 and the spring 73 can be effectively protected, preventing the intrusion of some debris and coal pieces. When the scraper fixing seat 3 and the coal scraper 4 move up and down slightly, the guide plate 6 will also move with the movable column 71 and the movable base plate 72. At the same time, the rubber protective base plate 82 and the rubber protective sleeve 81 move up and down together with the movable base plate 72, ensuring that the movable column 71 and the spring 73 are protected at all times. When the rubber protective sleeve 81 moves up and down, its top end will also move in the annular bottom groove 83.

[0035] In this embodiment, preferably, the inner and outer walls of the top end of the rubber protective cylinder 81 are provided with an integral annular elastic protrusion 811, and the annular elastic protrusion 811 fits against the inner wall of the annular bottom groove 83, which can further improve the protective sealing performance.

[0036] Example 2

[0037] Please see Figures 1 to 4 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but the difference is that a T-shaped bottom bracket 721 is fixed on the bottom surface of the movable base plate 72, and a circular locking hole 821 is opened through the center of the rubber protective base plate 82 for the T-shaped bottom bracket 721 to pass through. The bottom end of the T-shaped bottom bracket 721 passes through the circular locking hole 821 to the bottom of the rubber protective base plate 82, which can stably lock and limit the rubber protective base plate 82, and ensure the installation stability of the rubber protective base plate 82 and the rubber protective cylinder 81.

[0038] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A scraper assembly for a coal mill, comprising a drive seat (1) fixed to the bottom ends of two drive arms (2), a scraper fixing seat (3) movably disposed at the bottom of the drive seat (1), and a coal scraper (4) fixedly installed inside the scraper fixing seat (3) and extending to the bottom of the scraper fixing seat (3), characterized in that: Also includes Two guide posts (5) are symmetrically fixed on the top surface of the scraper fixing seat (3), and the top ends of the two guide posts (5) extend to the top of the drive seat (1). The top of the drive seat (1) is also provided with a guide plate (6) fixed to the two guide posts (5). And an elastic movable component (7) disposed between the guide plate (6) and the drive seat (1), the elastic movable component (7) includes a movable column (71) fixed at the bottom center of the guide plate (6), and the bottom end of the movable column (71) extends through to the bottom of the drive seat (1) and is fixed with a movable base plate (72), and a spring (73) is sleeved between the surface of the movable column (71) and the drive seat (1) relative to the movable base plate (72).

2. The scraper assembly for a coal mill according to claim 1, characterized in that: The bottom section of the coal scraper (4) is semi-circular.

3. A scraper assembly for a coal mill according to claim 1, characterized in that: The scraper fixing seat (3) is U-shaped when viewed from the side, and the top of the coal scraper (4) is fixed to the inside of the scraper fixing seat (3) by multiple bolts.

4. A scraper assembly for a coal mill according to claim 1, characterized in that: The drive seat (1) has a central through hole (11) at its center for the movable column (71) to pass through smoothly.

5. A scraper assembly for a coal mill according to claim 1, characterized in that: The bottom end of the spring (73) abuts against the top surface of the movable base plate (72), and the top end of the spring (73) abuts against the bottom surface of the drive seat (1).

6. A scraper assembly for a coal mill according to claim 1, characterized in that: It also includes a follow-up protective cover structure, which is disposed at the bottom of the drive seat (1).

7. A scraper assembly for a coal mill according to claim 6, characterized in that: The follow-up protective cover structure includes a rubber protective base plate (82) installed on the bottom surface of the movable base plate (72), a rubber protective cylinder (81) glued and fixed to the top surface of the rubber protective base plate (82) and covering the bottom end of the movable column (71), the movable base plate (72) and the spring (73) inside, and an annular bottom groove (83) opened on the bottom surface of the drive seat (1) for the rubber protective cylinder (81) to move, and the top end of the rubber protective cylinder (81) is located in the annular bottom groove (83).

8. A scraper assembly for a coal mill according to claim 7, characterized in that: The inner and outer walls of the top of the rubber protective cylinder (81) are provided with an integral annular elastic protrusion (811), and the annular elastic protrusion (811) fits against the inner wall of the annular bottom groove (83). The bottom surface of the movable base plate (72) is fixed with a T-shaped bottom bracket (721). A circular card hole (821) for the T-shaped bottom bracket (721) to pass through is provided in the center of the rubber protective base plate (82). The bottom end of the T-shaped bottom bracket (721) passes through the circular card hole (821) to the bottom of the rubber protective base plate (82).

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