CN218282091U

CN218282091U - Inlet hopper structure for coal mill

Info

Publication number: CN218282091U
Application number: CN202222616105.2U
Authority: CN
Inventors: 许建贤; 李悦悦; 刘冬; 贺天; 魏辅弢; 孔令顺
Original assignee: Huaneng Gansu Xigu Thermal Power Co ltd
Current assignee: Huaneng Gansu Xigu Thermal Power Co ltd
Priority date: 2022-10-04
Filing date: 2022-10-04
Publication date: 2023-01-13
Anticipated expiration: 2032-10-04

Abstract

The utility model relates to an entry hopper structure for coal pulverizer. The original coal mill inlet hopper structure causes serious local abrasion phenomenon and even leakage due to the scouring abrasion of raw coal, thereby bringing great hidden danger and inconvenience to safety and production. An inlet hopper construction for a coal pulverizer, comprising: the anti-abrasion device comprises an original coal mill inlet hopper (1), wherein a group of anti-abrasion lining plates A (3) and a group of anti-abrasion lining plates B (4) are arranged on the periphery of a hopper wall above the original coal mill inlet hopper through countersunk bolts (2), and the anti-abrasion lining plates A adopt guide plates of a medium-speed coal mill with the length of 280 mm; the anti-abrasion lining plate B adopts a guide plate of a medium-speed coal mill with the length of 320 mm; an inclined plate (6) is arranged on the upper part of an inspection hole (5) of an inlet hopper of the original coal mill, and the inclined plane of the inclined plate is fixedly connected into a whole through an inclined plate rib plate (7). The utility model discloses be applied to the pan feeding mouth of power plant coal pulverizer.

Description

Inlet hopper structure for coal mill

The technical field is as follows:

the utility model is used for power plant coal pulverizer installation accessory application technical field, concretely relates to entry hopper structure for coal pulverizer.

Background art:

coal mills are machines for breaking up and grinding coal briquettes into coal dust, which are important auxiliary equipment for coal dust furnaces. The coal grinding process is a process in which coal is crushed and its surface area is increased continuously. The coal is crushed in the coal mill mainly by three methods, crushing, breaking and grinding. However, no matter which way is used for coal grinding, the raw coal has a certain scouring and wearing effect on the inlet hopper in the long-term feeding process of the raw coal, so that the local part is seriously worn, and great hidden danger and inconvenience are brought to safety and production; on the other hand, its assembly is dismantled inconveniently, leads to entry hopper life short, needs often to shut down to overhaul and maintain, causes work efficiency low, increases manufacturing cost scheduling problem, can not satisfy the work demand of current thermal power factory coal pulverizer, and this is the problem that awaits solution at present.

The invention content is as follows:

the utility model aims at providing an entry hopper structure for coal pulverizer has solved original coal pulverizer entry hopper structure because the erosive wear of raw coal leads to its local serious wearing and tearing phenomenon to appear, provides the structure that changes impact, the great swash plate in inspection hole upper portion that weares and teares as required, need not to change whole. The working efficiency is greatly ensured, the working efficiency is improved, and the equipment maintenance cost is reduced.

The above purpose is realized by the following technical scheme:

an inlet hopper construction for a coal pulverizer, comprising: the anti-abrasion device comprises an original coal mill inlet hopper, wherein a group of anti-abrasion lining plates A and a group of anti-abrasion lining plates B are arranged on the periphery of a hopper wall above the original coal mill inlet hopper through countersunk bolts, and the group of anti-abrasion lining plates B are transversely arranged on the hopper wall of the original coal mill inlet hopper;

the upper part of the inspection hole of the original coal mill inlet hopper is provided with an inclined plate, and the inclined plane of the inclined plate is fixedly connected into a whole through an inclined plate rib plate.

The inlet hopper structure for the coal mill is characterized in that the anti-abrasion lining plate A is a guide plate of a medium-speed coal mill with the length of 280 mm.

The inlet hopper structure for the coal mill is characterized in that the anti-abrasion lining plate B adopts a guide plate of a medium-speed coal mill with the length of 320 mm.

The utility model has the advantages that:

1. the utility model discloses the fixed swash plate in hopper top abrasionproof welt all around and inspection hole upper portion that increase, its project organization is reasonable and be convenient for change and maintain, solved the serious whole change of traditional structure local wear, maintain inconvenient phenomenon, the fixed swash plate in its inspection hole upper portion has certain cushioning effect to the coal breakage simultaneously, greatly reduced its impact force to the entry hopper, only need as required to strike, the great swash plate in inspection hole upper portion of wearing and tearing is fixed change, need not to dig to mend the change to whole.

The utility model provides a traditional structure maintain inconvenient phenomenon, can change impact, the great welt of wearing and tearing as required, need not to change the hopper, practiced thrift maintenance time and reduced economic cost. The abrasion-proof lining plate is wear-resistant, strong in impact resistance, convenient to replace and free of long-time shutdown, and the working efficiency is improved; the inclined plate on the upper part of the inspection hole has a buffering effect on falling raw coal, and the impact damage of falling coal to the hopper is reduced.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 1.

Fig. 3 is a schematic structural diagram of an abrasion-proof lining plate a.

In the figure: 1. the coal mill comprises an original coal mill inlet hopper, 2, a countersunk head bolt, 3, anti-abrasion lining plates A and 4, anti-abrasion lining plates B and 5, an inspection hole, 6, an inclined plate, 7 and an inclined plate rib plate.

The specific implementation mode is as follows:

example 1:

as shown in fig. 1-2, an inlet hopper structure for a coal pulverizer comprises: the anti-abrasion device comprises an original coal mill inlet hopper 1, wherein a group of anti-abrasion lining plates A3 and a group of anti-abrasion lining plates B4 are arranged on the periphery of a hopper wall above the original coal mill inlet hopper through countersunk bolts 2, and the anti-abrasion lining plates A adopt guide plates of a medium-speed coal mill with the length of 280 mm; the anti-abrasion lining plate B adopts a guide plate of a medium-speed coal mill with the length of 320 mm; the anti-abrasion device comprises an original coal mill inlet hopper, a hopper wall of the original coal mill inlet hopper, a group of anti-abrasion lining plates B, a group of anti-abrasion lining plates A and a group of anti-abrasion lining plates B, wherein the hopper wall of the original coal mill inlet hopper is limited in size; an inclined plate 6 is arranged on the upper portion of an inspection hole 5 of an inlet hopper of the original coal mill, and the inclined plane of the inclined plate is fixedly connected into a whole through an inclined plate rib plate 7. The inclined plates are of rectangular plate structures, a group of inclined plates are fixed near an inspection hole of an inlet hopper of the coal mill in a welding mode, and a group of inclined plate rib plates are fixed on one inclined surface of each inclined plate in a welding air mode, so that the inclined plate rib plates and the inclined plates are of an integrated structure.

As shown in fig. 3, the anti-wear lining plate a is laid on the inner wall of the hopper wall of the original coal mill inlet hopper in a U-shaped structure, the thickness of the anti-wear lining plate a is the same as that of the anti-wear lining plate B, the length of the anti-wear lining plate a is different from that of the anti-wear lining plate B, the length of the anti-wear lining plate B is 40mm longer than that of the anti-wear lining plate a, and the anti-wear lining plate B is only transversely arranged in a row mainly due to size limitation. An anti-abrasion lining plate is added on the periphery above an inlet hopper of the original coal mill, and an inclined plate fixed by an inclined plate rib plate is added on the upper part of an inspection hole. The abrasion-proof lining plate added on the periphery of the wear-proof lining plate is strong in abrasion resistance and impact resistance, and long-time shutdown equipment is not needed after abrasion, so that the wear-proof lining plate is convenient to replace; the inclined plate fixed on the upper part of the inspection hole has a certain buffering effect on the fallen coal, the impact force of the inclined plate on the inlet hopper is greatly reduced, the inclined plate fixed on the upper part of the inspection hole with larger impact and abrasion is only required to be replaced according to requirements, and the whole inclined plate is not required to be replaced by patching. The working efficiency is greatly ensured, and the equipment maintenance cost is reduced.

Claims

1. An inlet hopper construction for a coal pulverizer, comprising: former coal pulverizer entry hopper, characterized by: a group of anti-abrasion lining plates A and a group of anti-abrasion lining plates B are arranged on the periphery of the hopper wall above the inlet hopper of the original coal mill through countersunk bolts, wherein the group of anti-abrasion lining plates B are transversely arranged on the hopper wall of the inlet hopper of the original coal mill;

the upper part of an inspection hole of the original coal mill inlet hopper is provided with an inclined plate, and the inclined plane of the inclined plate is fixedly connected into a whole through an inclined plate rib plate.

2. The inlet hopper construction for a coal pulverizer as defined in claim 1 wherein: the anti-abrasion lining plate A is a guide plate of a medium speed coal mill with the length of 280 mm.

3. The inlet hopper construction for a coal pulverizer as defined in claim 1 wherein: the anti-abrasion lining plate B is a guide plate of a medium speed coal mill with the length of 320 mm.