Guiding coal feeding device on coal mill

Abstract

The utility model relates to the field of coal mills, in particular to a guide coal feeding device on a coal mill, which comprises an obliquely arranged rectangular coal feeding pipe, the upper part of the rectangular coal feeding pipe is connected with a vertically arranged butt joint pipe, a plurality of wear-resisting plates are arranged in the rectangular coal feeding pipe from bottom to top, the wear-resisting plates are concave, and the wear-resisting plates are connected with the butt joint pipe. A pressing plate is arranged at the top of the uppermost wear-resisting plate, an elastic piece is arranged on the side, away from the wear-resisting plates, of the pressing plate, one end of the elastic piece abuts against the pressing plate, the other end of the elastic piece abuts against an end cover, and the end cover is connected to an upper end opening of the rectangular coal inlet pipe. By means of the structure, workers can conveniently conduct maintenance operation outside equipment, and the operation risk of the workers can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of coal mills, in particular to a coal-feeding guide device on a coal mill. Background Art

[0002] Coal mill is a machine that breaks coal into powder and grinds it into coal powder. It is an important auxiliary equipment for pulverized coal furnace. Figure 1 As shown, an existing vertical coal mill has a coal feed pipe arranged obliquely on the side of the machine body. The coal feed pipe is constantly hit by coal blocks and is easily worn. In the prior art, a wear-resistant plate is laid in the coal feed pipe to increase the service life of the coal feed pipe. However, when replacing the wear-resistant plate, personnel need to enter the coal mill and then operate and replace it from the lower port of the coal feed pipe.

[0003] The above maintenance method has limited working space, which is not conducive to workers' operation. At the same time, it is not safe for workers to enter the coal mill. Utility Model Content

[0004] Based on the above problems, the purpose of the utility model is to provide a coal-feeding guide device for a coal mill. The utility model adopts the following technical solutions:

[0005] The utility model provides a guiding coal feeding device on a coal mill, comprising an inclined rectangular coal feeding pipe, the upper part of the rectangular coal feeding pipe is connected to a vertically arranged butt pipe, a plurality of wear-resistant plates are arranged from bottom to top in the rectangular coal feeding pipe, the wear-resistant plates are in a concave shape, a pressure plate is arranged on the top of the wear-resistant plate located at the top, an elastic member is arranged on the side of the pressure plate away from the wear-resistant plate, one end of the elastic member abuts against the pressure plate, and the other end abuts against the end cover, and the end cover is connected to the upper port of the rectangular coal feeding pipe.

[0006] Preferably, both side edges of the lower port of the rectangular coal inlet pipe are provided with inwardly extending limit ribs, and the wear-resistant plate located at the bottom abuts against the limit ribs.

[0007] Preferably, the tops of both sides of the wear-resistant plate are provided with inwardly inclined chamfers.

[0008] Preferably, wire grooves are provided on the outer walls on both sides of the wear-resistant plate, and pull wires are provided in the wire grooves. One end of the pull wire is fixed to the wire groove, and the other end extends to the tail of the rectangular coal inlet pipe.

[0009] Preferably, an annular mounting plate is fixed on the outer wall of the rectangular coal inlet pipe.

[0010] Compared with the prior art, the beneficial technical effects of the utility model are:

[0011] The structure of the present utility model facilitates the maintenance work of workers outside the equipment and can effectively reduce the risk of workers' operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present utility model will be further described below in conjunction with the drawings.

[0013] Figure 1 Schematic structural diagram of the existing coal mill;

[0014] Figure 2 Schematic structural diagram of the guiding coal feeding device on the coal mill of the present utility model;

[0015] Figure 3 Schematic structural diagram of the wear-resistant plate of the present utility model;

[0016] Figure 4 Schematic installation diagram of the guiding coal feeding device of the present utility model.

[0017] Description of reference numerals: 1, rectangular coal feeding pipe; 101, limit rib; 2, docking pipe; 3, wear-resistant plate; 301, chamfer; 302, wire groove; 4, pressing plate; 5, elastic member; 6, end cover; 7, pull wire; 8, annular mounting plate; 9, coal mill housing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with the drawings and embodiments.

[0019] As Figures 2 to 4 shown, a guiding coal feeding device on a coal mill is disclosed in this embodiment, including a rectangular coal feeding pipe 1 arranged obliquely. A vertically arranged docking pipe 2 is welded to the upper part of the rectangular coal feeding pipe 1. A plurality of wear-resistant plates 3 are arranged in the rectangular coal feeding pipe 1 from bottom to top. The wear-resistant plates 3 are in a concave shape. A pressing plate 4 is arranged at the top of the uppermost wear-resistant plate 3. An elastic member 5 is arranged on the side of the pressing plate 4 facing away from the wear-resistant plate 3. One end of the elastic member 5 abuts against the pressing plate 4, and the other end abuts against the end cover 6. The end cover 6 is connected to the upper port of the rectangular coal feeding pipe 1 by bolts.

[0020] When replacing the wear-resistant plate 3, the end cover 6 at the top of the rectangular coal feeding pipe 1 can be removed, and the wear-resistant plate 3 can be gradually pulled out from above for replacement.

[0021] In this embodiment, limit ribs 101 extending inward are arranged on both sides of the lower port of the rectangular coal feeding pipe 1, and the lowermost wear-resistant plate 3 abuts against the limit ribs 101.

[0022] In this embodiment, chamfers 301 inclined inward are arranged at the tops of both sides of the wear-resistant plate 3 to facilitate the movement of the material at the edge to the middle.

[0023] In this embodiment, wire grooves 302 are provided on the outer walls on both sides of the wear-resistant plate 3, and a wire rope 7 is arranged in the wire grooves 302. One end of the wire rope 7 is fixed to the wire groove 302, and the other end extends to the tail of the rectangular coal inlet pipe 1. In this way, when the wear-resistant plate 3 is pulled outwards, the operation is facilitated through the wire rope 7. The wire rope 7 can specifically adopt a steel wire rope.

[0024] In this embodiment, an annular mounting plate 8 is fixed on the outer wall of the rectangular coal inlet pipe 1, and the mill housing 9 is provided with a reserved mounting hole. After the rectangular coal inlet pipe 1 extends in from the reserved mounting hole, the annular mounting plate 8 is mounted on the mill housing 9.

[0025] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A guiding coal feeding device on a coal mill, comprising a rectangular coal feeding pipe (1) arranged obliquely, characterized in that: The upper part of the rectangular coal inlet pipe (1) is connected to a vertically arranged butt joint pipe (2), and a plurality of wear-resistant plates (3) are arranged in the rectangular coal inlet pipe (1) from bottom to top, and the wear-resistant plates (3) are in a concave shape. A pressure plate (4) is arranged on the top of the wear-resistant plate (3) located at the top, and an elastic member (5) is arranged on the side of the pressure plate (4) away from the wear-resistant plate (3), one end of the elastic member (5) abuts against the pressure plate (4), and the other end abuts against the end cover (6), and the end cover (6) is connected to the upper port of the rectangular coal inlet pipe (1).

2. The guiding coal feeding device on the coal mill according to claim 1, wherein: Both sides of the lower end of the rectangular coal inlet pipe (1) are provided with inwardly extending limit ribs (101), and the wear-resistant plate (3) located at the bottom abuts against the limit ribs (101).

3. The guiding coal feeding device on the coal mill according to claim 1, characterized in that: The tops of both sides of the wear-resistant plate (3) are provided with inwardly inclined chamfers (301).

4. The guiding coal feeding device on the coal mill according to claim 1, characterized in that: Wire grooves (302) are provided on the outer walls of both sides of the wear-resistant plate (3), and a pull wire (7) is provided in the wire groove (302). One end of the pull wire (7) is fixed to the wire groove (302), and the other end extends to the tail of the rectangular coal inlet pipe (1).

5. The guiding coal feeding device on the coal mill according to claim 1, characterized in that: An annular mounting plate (8) is fixed on the outer wall of the rectangular coal inlet pipe (1).

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