Rotary nozzle ring of coal mill

Abstract

The utility model discloses a rotary nozzle ring of a coal mill, which belongs to the technical field of coal mills, and comprises a fixed ring, a plurality of flow guide mechanisms and a wear-resistant ring, a plurality of positioning blocks are arranged on the side wall of the fixed ring, the plurality of flow guide mechanisms are clamped on the plurality of positioning blocks, the flow guide mechanisms are in one-to-one correspondence with the positioning blocks, and the wear-resistant ring is arranged on the fixed ring. A nozzle flow channel is formed between every two adjacent flow guide mechanisms, and the wear-resisting ring is fixedly installed on the end face of the fixing ring. The wear-resistant blocks and the flow guide blocks are mutually clamped to form the flow guide mechanisms, the flow guide blocks are clamped on the positioning blocks on the side wall of the fixed ring, and a nozzle flow channel is formed between every two adjacent flow guide mechanisms, so that the structure of the rotary nozzle ring, the wear-resistant rings and the wear-resistant blocks is formed, and the wear resistance of the rotary nozzle ring is improved; and only the part needs to be disassembled and replaced, and the whole rotating nozzle ring does not need to be disassembled and repaired, so that the rotating nozzle ring is convenient to disassemble and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mills, and in particular relates to a rotating nozzle ring of a coal mill. Background Art

[0002] The pulverizing coal mill for power generation boiler produces pulverized coal by rolling and then uses high-pressure hot air to provide fuel for the boiler. The rotating nozzle ring provides qualified pulverized coal for the boiler through rotation and wind pressure adjustment.

[0003] Currently, the nozzle ring is prone to wear during use, and the nozzle ring needs to be completely disassembled for repair, which makes disassembly and maintenance inconvenient. Utility Model Content

[0004] The utility model aims to solve the above-mentioned problems and proposes a rotating nozzle ring for a coal mill.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a coal mill rotating nozzle ring, which includes a fixed ring, a plurality of flow guide mechanisms and a wear-resistant ring, a plurality of positioning blocks are arranged on the side wall of the fixed ring, a plurality of the flow guide mechanisms are clamped on the plurality of the positioning blocks, the flow guide mechanisms correspond to the positioning blocks one by one, a nozzle flow channel is formed between two adjacent flow guide mechanisms, and the wear-resistant ring is fixedly installed on the end face of the fixed ring;

[0006] The flow guiding mechanism comprises a flow guiding block and a wear-resistant block. The flow guiding block is clamped on the positioning block, and the wear-resistant block is clamped on the end surface of the flow guiding block facing the wear-resistant ring.

[0007] As a further description of the above technical solution:

[0008] The guide block is provided with a positioning groove, the positioning block is inserted into the positioning groove, and the guide block is connected to the positioning block via a first bolt.

[0009] As a further description of the above technical solution:

[0010] A plurality of guide grooves are provided on the end surface of the guide block, a plurality of guide sliding blocks are provided on the wear-resistant block, the guide sliding blocks are inserted into the guide grooves, and the wear-resistant block is connected to the guide block via a second bolt.

[0011] As a further description of the above technical solution:

[0012] The fixing ring is a circular ring, and the plurality of positioning blocks are arranged in a circular array along the axis of the fixing ring.

[0013] As a further description of the above technical solution:

[0014] The positioning block abuts against the inner wall of the positioning groove.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] In the utility model, a flow guide mechanism is formed by mutual clamping of the wear-resistant block and the guide block, the guide block is clamped on the positioning block on the side wall of the fixed ring, and a nozzle flow channel is formed between two adjacent flow guide mechanisms, thereby forming a rotating nozzle ring. The wear-resistant ring and the wear-resistant block structure are beneficial to improving the wear resistance of the rotating nozzle ring. Each component is assembled and installed in a modular manner. When a component is worn, it only needs to be disassembled and replaced, and there is no need to disassemble and repair the rotating nozzle ring as a whole, so that the rotating nozzle ring is easy to disassemble and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the overall structure of a rotating nozzle ring of a coal mill.

[0018] Figure 2 A cross-sectional view of a rotating nozzle ring of a coal mill.

[0019] Figure 3 for Figure 2 A partial enlarged view of part A.

[0020] Figure 4 This is an exploded view of a coal mill rotating nozzle ring.

[0021] Figure 5 This is an exploded view of the flow guide mechanism in the rotating nozzle ring of a coal mill.

[0022] Legend:

[0023] 1. Fixed ring; 2. Guide mechanism; 21. Guide block; 22. Wear-resistant block; 3. Wear-resistant ring; 4. Positioning block; 5. Nozzle flow channel; 6. Positioning groove; 7. First bolt; 8. Guide slide groove; 9. Guide slide block; 10. Second bolt. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5The utility model provides a technical solution: a coal mill rotating nozzle ring, comprising a fixed ring 1, a plurality of flow guide mechanisms 2 and a wear-resistant ring 3, a plurality of positioning blocks 4 are arranged on the side wall of the fixed ring 1, a plurality of the flow guide mechanisms 2 are clamped on the plurality of the positioning blocks 4, the flow guide mechanisms 2 correspond to the positioning blocks 4 one by one, a nozzle flow channel 5 is formed between two adjacent flow guide mechanisms 2, and the wear-resistant ring 3 is fixedly mounted on the end face of the fixed ring 1;

[0026] The guide mechanism 2 includes a guide block 21 and a wear-resistant block 22. The guide block 21 is clamped on the positioning block 4, and the wear-resistant block 22 is clamped on the end surface of the guide block 21 facing the wear-resistant ring 3.

[0027] The guide block 21 is provided with a positioning groove 6, the positioning block 4 is inserted into the positioning groove 6, and the guide block 21 is connected to the positioning block 4 via a first bolt 7, so that the guide block 21 is conveniently connected and installed with the positioning block 4, and the guide block 21 is conveniently replaced;

[0028] A plurality of guide grooves 8 are provided on the end surface of the guide block 21, a plurality of guide sliding blocks 9 are provided on the wear-resistant block 22, the guide sliding blocks 9 are inserted into the guide grooves 8, and the wear-resistant block 22 is connected to the guide block 21 by a second bolt 10, so that the guide block 21 and the wear-resistant block 22 are conveniently connected and installed, and the wear-resistant block 22 is conveniently replaced;

[0029] The fixing ring 1 is a circular ring, and the plurality of positioning blocks 4 are arranged in a circular array along the axis of the fixing ring 1;

[0030] The positioning block 4 abuts against the inner wall of the positioning groove 6 to ensure that the guide block 21 is firmly installed.

[0031] Working principle: First, when rotating the nozzle ring for assembly, align the positioning groove 6 on the guide block 21 with the positioning block 4 on the side wall of the fixed ring 1 and snap it in, use the first bolt 7 to fix the guide block 21 on the positioning block 4, snap the guide slide block 9 on the wear-resistant block 22 into the guide slide groove 8 on the guide block 21, and use the second bolt 10 to fix the guide block 21 and the wear-resistant block 22 to each other to complete the assembly of the guide mechanism 2. Secondly, assemble multiple guide mechanisms 2 in turn to form a nozzle flow channel 5 between two adjacent guide mechanisms 2. Then, install the wear-resistant ring 3 on the fixed ring 1. Finally, when any guide block 21 or wear-resistant block 22 is damaged, only the corresponding guide block 21 or wear-resistant block 22 needs to be disassembled and replaced.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coal mill rotating nozzle ring, characterized in that: It comprises a fixed ring (1), a plurality of flow guide mechanisms (2) and a wear-resistant ring (3); a plurality of positioning blocks (4) are arranged on the side wall of the fixed ring (1); a plurality of the flow guide mechanisms (2) are clamped on the plurality of positioning blocks (4); the flow guide mechanisms (2) correspond to the positioning blocks (4) one by one; a nozzle flow channel (5) is formed between two adjacent flow guide mechanisms (2); and the wear-resistant ring (3) is fixedly mounted on the end surface of the fixed ring (1); The flow guide mechanism (2) comprises a flow guide block (21) and a wear-resistant block (22); the flow guide block (21) is clamped on the positioning block (4); and the wear-resistant block (22) is clamped on the end surface of the flow guide block (21) facing the wear-resistant ring (3).

2. A coal mill rotating nozzle ring according to claim 1, characterized in that: The guide block (21) is provided with a positioning groove (6), the positioning block (4) is inserted into the positioning groove (6), and the guide block (21) is connected to the positioning block (4) via a first bolt (7).

3. A coal mill rotating nozzle ring according to claim 2, characterized in that: A plurality of guide grooves (8) are provided on the end surface of the guide block (21), a plurality of guide sliding blocks (9) are provided on the wear-resistant block (22), the guide sliding blocks (9) are inserted into the guide grooves (8), and the wear-resistant block (22) is connected to the guide block (21) via a second bolt (10).

4. A coal mill rotating nozzle ring according to claim 3, characterized in that: The fixing ring (1) is a circular ring, and the plurality of positioning blocks (4) are arranged in a circular array along the axis of the fixing ring (1).

5. A coal mill rotating nozzle ring according to claim 4, characterized in that: The positioning block (4) abuts against the inner wall of the positioning groove (6).

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