CN115739364A - Layered sectional type dynamic and static ring of coal mill - Google Patents
Layered sectional type dynamic and static ring of coal mill Download PDFInfo
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- CN115739364A CN115739364A CN202211486940.7A CN202211486940A CN115739364A CN 115739364 A CN115739364 A CN 115739364A CN 202211486940 A CN202211486940 A CN 202211486940A CN 115739364 A CN115739364 A CN 115739364A
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Abstract
The invention discloses a layered and sectional type moving and static ring of a coal mill, which comprises a static ring and a moving ring arranged on the inner side of the static ring, wherein the bottom of the static ring is connected with an integrally formed static ring base; the rotating ring includes a plurality of section structure the same rotating ring section, and the rotating ring is close to quiet ring one side rigid coupling and has a plurality of rotating ring separation tooth, and a plurality of rotating ring separation tooth evenly sets up along rotating ring circumference. The layered and sectional type moving and static ring of the coal mill can remove the damaged moving ring or static ring in a targeted manner, does not need to be removed integrally, saves time and labor and greatly reduces the maintenance cost of equipment.
Description
Technical Field
The invention belongs to the technical field of coal mill equipment, and particularly relates to a layered and sectional type dynamic and static ring of a coal mill.
Background
After the coal mill runs for a period of time, the movable ring and the static ring are subjected to severe abrasion due to wind erosion, erosion of impurities such as pebble coal, iron blocks and the like, particularly, the static ring is worn through at the nozzle throat of the movable ring and the upper part of the static ring even sometimes to cause primary wind leakage of the coal mill, so that the pebble coal quantity of the coal mill is increased, the output is reduced, the power consumption is increased and the like, the running cost of the coal mill is increased, the existing coal mill generally adopts an integral movable ring and a static ring, the abrasion of the movable ring and the static ring is often uneven, and the integral movable ring and the static ring often cause failure of the movable ring or the static ring due to the severe abrasion of one part. Because the integral dynamic and static rings are adopted, the most commonly adopted measure after the failure is replacement. When the movable and static rings are replaced, the separator needs to be removed firstly, then the hydraulic device, the pressing frame, the grinding roller device, the grinding disc and the like are removed, and then the movable and static rings can be replaced.
Disclosure of Invention
The invention aims to provide a layered and sectional type moving ring and a damaged stationary ring of a coal mill, which can be detached in a targeted manner without integrally detaching, so that time and labor are saved, and the equipment maintenance cost is greatly reduced.
The technical scheme adopted by the invention is that the coal mill layered and segmented movable and stationary ring comprises a stationary ring and a movable ring arranged on the inner side of the stationary ring, the bottom of the stationary ring is connected with an integrally formed stationary ring base, and the stationary ring comprises a plurality of stationary ring segments with the same structure; the rotating ring comprises a plurality of rotating ring sections with the same section structures, a plurality of rotating ring separation teeth are fixedly connected to one side, close to the static ring, of the rotating ring, the plurality of rotating ring separation teeth are evenly arranged along the circumferential direction of the rotating ring, the cross section of each rotating ring separation tooth is formed by a water drop shape and a triangular shape, and the triangular structure is located on one side of the tip end of the water drop shape structure.
The present invention is also characterized in that,
the static ring base is in a circular ring shape, a plurality of threaded holes are formed in the static ring base, connecting holes corresponding to the threaded holes are formed in the static ring sections, bolts a penetrate through the connecting holes, and one ends of the bolts a are connected with the threaded holes.
The cross section of the movable ring section is 7-shaped, the movable ring separating teeth are fixedly connected to the outer side of the long side of the 7-shaped section, and the short side of the movable ring section is provided with a mounting hole.
The mounting hole is internally provided with a bolt b in a penetrating way, and the movable ring section is connected with the tray through the bolt b.
And the bolt b is an M24X80 internal hexagonal bolt.
And a rotating nozzle is formed between the adjacent separating teeth of the movable ring.
The static ring section is 8-10 sections.
The movable ring section is 6 sections.
The movable ring section and the static ring section are made of metal ceramic materials.
The beneficial effect of the invention is that,
(1) According to the layered and segmented dynamic and static ring, due to the layered design of the dynamic and static rings, only the dynamic and static rings of the damaged section need to be replaced when the dynamic and static rings are maintained and replaced, the whole equipment does not need to be dismantled, the maintenance cost and the maintenance time are reduced, and the working efficiency of the equipment is ensured.
(2) The whole of the layered and sectional type moving and static rings is cast by adopting the metal ceramic material, so that the wear resistance of the moving and static rings is greatly improved, and the service life of the moving and static rings is prolonged.
Drawings
FIG. 1 is a schematic structural view of a layered and segmented dynamic and static ring of the coal pulverizer of the present invention;
FIG. 2 is a cross-sectional view of a layered and segmented static and dynamic ring of the coal pulverizer of the present invention;
FIG. 3 is a schematic structural view of a moving ring separating tooth in a layered and sectional type moving ring and a stationary ring of the coal mill.
In the figure, 1, a static ring, 1-1, a static ring section, 2, a dynamic ring, 2-1, a dynamic ring section, 3, a static ring base, 4, a tray, 5, a rotating nozzle, 6, a bolt a,7, a bolt b,8, a threaded hole, 9, a mounting hole, 10, a connecting hole and 11, a dynamic ring separation tooth are arranged.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a layered and sectional type moving and static ring structure of a coal mill, which is shown in figure 1 and comprises a static ring 1 and a moving ring 2 arranged on the inner side of the static ring 1, wherein the bottom of the static ring 1 is connected with an integrally formed static ring base 3, the static ring base 3 is in a circular ring shape, a plurality of threaded holes 8 are formed in the connection surface with the static ring 1, the static ring 1 comprises a plurality of static ring segments 1-1 with the same structure, the static ring segments 1-1 are in an arc shape, the static ring segments 1-1 are connected end to form the circular ring static ring 1, when one static ring segment 1-1 in the static ring 1 is damaged due to long-term work, the damaged static ring segment 1-1 can be directly dismounted without dismounting the whole equipment, and the static ring segments 1-1 have the same structure, so that interchangeability is realized among the static ring segments 1-1, the equipment is convenient to mount, the original long-term maintenance and replacement period is shortened to only several days, and the working efficiency is greatly improved.
Preferably, the static ring section 1-1 is 8-10 sections, and a connecting hole 10 is formed in the position, corresponding to the threaded hole 8, of the static ring section 1-1.
The movable ring 2 also comprises a plurality of movable ring segments 2-1 with the same structure, the movable ring segments 2-1 are arc-shaped, mounting holes 9 are formed in the movable ring segments 2-1, one side, close to the stationary ring 1, of each movable ring segment 2-1 is fixedly connected with a plurality of movable ring separation teeth 11, the movable ring separation teeth 11 and the plurality of movable ring separation teeth 11 are uniformly distributed along the circumferential direction of the movable ring, and a rotary nozzle 5 is formed between every two adjacent movable ring separation teeth 11;
preferably, the movable ring section 2-1 is 6 sections, the movable ring section 2-1 and the static ring section 1-1 are both made of metal ceramic materials through casting, specifically, the movable ring section and the static ring section are made of high-chromium and ceramic through one-time composite casting, the surface hardness reaches more than HRC61, compared with the existing equipment, the hardness and the wear resistance are greatly improved, and the service lives of the movable ring 2 and the static ring 1 of the coal mill are greatly prolonged.
As shown in fig. 2, the stationary ring segment 1-1 is connected with the stationary ring base 3 through a bolt a6, the bolt a6 is located in the connecting hole 10, and one end of the bolt a6 is connected with the threaded hole 8; a bolt b7 is arranged in a mounting hole 9 of the movable ring section 2-1, and the movable ring section 2-1 is connected with the tray 4 through the bolt b 7; the bolt b7 is an M24X80 inner hexagonal bolt, the strength of the M24X80 inner hexagonal bolt is 10.9 grades, the long-period operation of the movable ring 2 and the tray 4 can be ensured, and the phenomenon of shearing the bolt can not occur.
The cross section of the movable ring section 2-1 is 7-shaped, the movable ring separation teeth 11 are fixedly connected to the outer side of the long side of the 7-shaped, and the mounting hole 9 is positioned on the short side of the movable ring section 2-1.
As shown in figure 3, the section of the moving ring separating tooth 11 is formed by a water drop shape and a triangular shape, the triangular structure is positioned on one side of the tip end of the water drop shape structure, the part above a cylinder static ring 1 of the coal mill, a roller frame and a loading frame are greatly reduced by flushing primary air from a rotating nozzle 5, the primary air resistance is reduced, and the output of the coal mill is improved by more than 10%.
When the layered and segmented moving and static ring of the coal mill is assembled, firstly, 6 segments of moving ring segments 2-1 are sequentially connected end to end and connected with a tray 4 through bolts b7, then 10 segments of static ring segments 1-1 are sequentially connected end to end and connected with a static ring base 3 through bolts a6, the static ring base 3 is fixedly connected with a shell of the coal mill, and the operation can be started after the static ring base 3 is fixed; when the movable ring 2 or the static ring 1 has a fault, judging that the section of the movable ring section 2-1 or the static ring section 1-1 has a problem, then removing the damaged movable ring section 2-1 and the damaged static ring section 1-1 for replacement, and after the new movable ring section 2-1 and the new static ring section 1-1 are assembled, checking that the equipment has no problem and then working again.
Claims (9)
1. The layered and sectional type moving and static ring of the coal mill is characterized by comprising a static ring (1) and a moving ring (2) arranged on the inner side of the static ring (1), wherein the bottom of the static ring (1) is connected with an integrally formed static ring base (3), and the static ring (1) comprises a plurality of static ring sections (1-1) with the same structure; the rotating ring (2) includes the same rotating ring section (2-1) of a plurality of section structures, rotating ring (2) are close to quiet ring (1) one side rigid coupling and have a plurality of rotating ring separation tooth (11), a plurality of rotating ring separation tooth (11) are evenly set up along rotating ring (2) circumference, rotating ring separation tooth (11) cross-section comprises water droplet form and triangle-shaped shape, the triangle-shaped structure is located the most advanced one side of water droplet form structure.
2. The layered and segmented dynamic and static ring of the coal mill as claimed in claim 1, wherein the static ring base (3) is circular, a plurality of threaded holes (8) are formed in the static ring base (3), connecting holes (10) corresponding to the threaded holes (8) are formed in the static ring segments (1-1), bolts a (6) are inserted into the connecting holes (10), and one ends of the bolts a (6) are connected with the threaded holes (8).
3. The layered and segmented dynamic and static ring of the coal mill as claimed in claim 2, wherein the cross section of the dynamic ring segment (2-1) is 7-shaped, the dynamic ring separating teeth (11) are fixedly connected to the outer side of the long side of the 7-shaped, and the short side of the dynamic ring segment (2-1) is provided with a mounting hole (9).
4. The layered and segmented dynamic and static ring of the coal mill as claimed in claim 3, wherein bolts b (7) are inserted into the mounting holes (9), and the dynamic ring segment (2-1) is connected with the tray (4) through the bolts b (7).
5. The coal mill layered segment static and dynamic ring as claimed in claim 4, wherein the bolts b (7) are M24X80 hexagon socket bolts.
6. The layered and segmented dynamic and static ring for a coal mill according to any of claims 1 to 5, characterized in that between adjacent separating teeth (11) of the dynamic ring a rotating nozzle (5) is formed.
7. The coal mill layered and segmented dynamic and static ring according to any one of the claims 1 to 5, wherein the static ring segment (1-1) is 8 to 10 segments.
8. The coal mill layered and segmented dynamic and static ring according to any one of claims 1 to 5, wherein the dynamic ring segment (2-1) is 6 segments.
9. The layered and segmented dynamic and static ring of the coal mill as claimed in any one of claims 1 to 5, wherein the dynamic ring segment (2-1) and the static ring segment (1-1) are made of metal ceramic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211486940.7A CN115739364A (en) | 2022-11-24 | 2022-11-24 | Layered sectional type dynamic and static ring of coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211486940.7A CN115739364A (en) | 2022-11-24 | 2022-11-24 | Layered sectional type dynamic and static ring of coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115739364A true CN115739364A (en) | 2023-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211486940.7A Pending CN115739364A (en) | 2022-11-24 | 2022-11-24 | Layered sectional type dynamic and static ring of coal mill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117619503A (en) * | 2024-01-25 | 2024-03-01 | 北京蓝爱迪电力技术有限公司 | Dynamic and static ring adjusting mechanism of coal mill |
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2022
- 2022-11-24 CN CN202211486940.7A patent/CN115739364A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117619503A (en) * | 2024-01-25 | 2024-03-01 | 北京蓝爱迪电力技术有限公司 | Dynamic and static ring adjusting mechanism of coal mill |
| CN117619503B (en) * | 2024-01-25 | 2024-04-30 | 北京蓝爱迪电力技术有限公司 | Dynamic and static ring adjusting mechanism of coal mill |
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