CN220091574U - Air ring structure for coal mill, coal mill and coal powder production line - Google Patents
Air ring structure for coal mill, coal mill and coal powder production line Download PDFInfo
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- CN220091574U CN220091574U CN202321505194.1U CN202321505194U CN220091574U CN 220091574 U CN220091574 U CN 220091574U CN 202321505194 U CN202321505194 U CN 202321505194U CN 220091574 U CN220091574 U CN 220091574U
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- ring
- coal
- movable ring
- movable
- base
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- 239000003245 coal Substances 0.000 title claims abstract description 88
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 title abstract description 8
- 230000003068 static effect Effects 0.000 claims abstract description 37
- 238000000227 grinding Methods 0.000 claims abstract description 19
- 239000002817 coal dust Substances 0.000 claims description 6
- 239000004575 stone Substances 0.000 abstract description 12
- 238000005299 abrasion Methods 0.000 abstract description 10
- 238000009825 accumulation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
Abstract
The utility model provides an air ring structure for a coal mill, the coal mill and a coal powder production line, which belong to the technical field of coal grinding equipment, and comprise a movable ring base, a movable ring, a stationary ring base and a stationary ring, wherein a through hole is formed in the movable ring base, and the movable ring is fixedly arranged on the movable ring base; the movable ring is provided with a nozzle which is communicated with the through hole; one side of the nozzle, which is close to the millstone, is lower than one side of the nozzle, which is far away from the millstone; the static ring is fixedly arranged on the static ring base, one side of the static ring is provided with a lap joint part, and the lap joint part is in dynamic seal fit connection with the movable ring; an axial gap is arranged between the lower end face of the lap joint part and the upper end face of the movable ring. According to the wind ring structure for the coal mill, the gap between the movable ring and the static ring is the axial gap, the axial gap is higher than the nozzle and the movable ring, stone coal is not easy to enter the axial gap, the abrasion of the movable ring and the static ring is avoided, and the higher use efficiency of the mill is ensured.
Description
Technical Field
The utility model belongs to the technical field of coal grinding equipment, and particularly relates to an air ring structure for a coal mill, the coal mill and a coal powder production line.
Background
The coal mill is main equipment of a pulverizing system, a gap between a movable ring and a static ring on the pulverizer is of a radial structure, and falling pebble coal is easy to enter the gap; in the process that the movable ring rotates along with the grinding disc, abrasion is easily caused at the matched installation position of the movable ring and the static ring. When the gap is too large, the coal mill efficiency decreases, and the longer the time, the more wear will be, and the lower the efficiency will be.
Disclosure of Invention
The utility model aims to provide an air ring structure for a coal mill, the coal mill and a coal powder production line, and aims to solve the technical problems that stone coal in the prior art easily enters a gap between a movable ring and a stationary ring, and the movable ring and the stationary ring are easily damaged.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a wind ring structure for coal pulverizer, include:
the movable ring base is arranged in the coal mill and surrounds the grinding disc, and is fixedly connected with the grinding disc; the movable ring base is provided with a through hole which is arranged from bottom to top;
the movable ring is fixedly arranged on the movable ring base; the movable ring is provided with a nozzle which is arranged from bottom to top, and the nozzle is communicated with the through hole; one side of the nozzle close to the grinding disc is lower than one side of the nozzle far away from the grinding disc;
the stationary ring base is fixedly arranged on the inner wall of the coal mill; the static ring base is positioned between the movable ring and the inner wall of the coal mill;
the stationary ring is fixedly arranged on the stationary ring base; one side of the stationary ring is provided with a lap joint part extending towards the movable ring, and the lap joint part is in dynamic seal fit connection with the movable ring; an axial gap is formed between the lower end face of the lap joint part and the upper end face of the movable ring.
In one possible implementation manner, the moving ring base, the moving ring, the stationary ring base and the stationary ring are formed by splicing a plurality of arc segments, and the number of the moving ring base, the moving ring, the stationary ring base and the stationary ring is a plurality; and two adjacent arc sections are fixedly connected.
In one possible implementation, each of the moving rings is detachably connected to the corresponding moving ring base, and each of the stationary rings is detachably connected to the corresponding stationary ring base.
In one possible implementation, the stationary ring is provided with an inclined guide surface on the side close to the grinding disc for avoiding coal dust accumulation.
In one possible implementation, the cross-sectional area of the lower end of the through-opening is larger than the cross-sectional area of the upper end of the nozzle.
In one possible implementation, the axial gap is 5-8mm.
In one possible implementation, a plurality of adjustment shims are disposed within the axial gap.
The wind ring structure for the coal mill has the beneficial effects that: compared with the prior art, according to the wind ring structure for the coal mill, the static ring is arranged above the movable ring by virtue of the static ring base, the gap between the movable ring and the static ring is an axial gap by virtue of the lap joint part of the static ring extending towards the static ring, stone coal is not easy to enter the axial gap by virtue of the axial gap, and abrasion between the movable ring and the static ring can be avoided; meanwhile, the outer side of the nozzle on the movable ring is higher than the inner side of the nozzle, so that the position of the axial gap is improved, the hot air has a tendency of inward flow, and stone coal entering the axial gap is effectively reduced; by means of the mode, the gap between the movable ring and the static ring is changed from the radial gap to the axial gap, the position of the axial gap is higher than that of the nozzle and the movable ring, stone coal is not easy to enter the axial gap, abrasion of the movable ring and the static ring is avoided, and the mill is ensured to have higher use efficiency.
Another object of the present utility model is to provide a coal pulverizer including any one of the above-mentioned wind ring structures for coal pulverizer.
According to the coal mill provided by the utility model, due to the adoption of the wind ring structure for the coal mill, the gap between the movable ring and the static ring is changed from the radial gap to the axial gap, the axial gap is higher than the nozzle and the movable ring, stone coal is not easy to enter the axial gap, the abrasion of the movable ring and the static ring is avoided, and the higher service efficiency of the mill is ensured.
Another object of the utility model is to provide a coal dust production line comprising any one of the coal mills described above.
According to the pulverized coal production line provided by the utility model, as the coal mill is adopted, the gap between the movable ring and the static ring is changed from the radial gap to the axial gap, the axial gap is higher than the nozzle and the movable ring, stone coal is not easy to enter the axial gap, the abrasion condition of the movable ring and the static ring is avoided, the higher use efficiency of the pulverizer is ensured, and the pulverized coal production line is enabled to work efficiently.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a wind ring structure for a coal mill according to an embodiment of the present utility model.
Wherein, each reference sign in the figure:
1. a moving ring base; 11. a through hole; 2. a moving ring; 21. a nozzle; 3. a stationary ring base; 4. a stationary ring; 41. a lap joint; 42. an axial gap; 43. and the inclined guide surface.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1, an air ring structure for a coal mill provided by the utility model will now be described. The utility model provides a wind ring structure for coal pulverizer, includes moving ring base 1, moving ring 2, quiet ring base 3 and quiet ring 4, and moving ring base 1 is used for installing in the coal pulverizer, and encircles the mill setting, and moving ring base 1 is used for with mill fixed connection; the movable ring base 1 is provided with a through hole 11 which is arranged from bottom to top; the movable ring 2 is fixedly arranged on the movable ring base 1; the movable ring 2 is provided with a nozzle 21 which is arranged from bottom to top, and the nozzle 21 is communicated with the through hole 11; the side of the nozzle 21 close to the grinding disc is lower than the side of the nozzle 21 far from the grinding disc; the stationary ring base 3 is used for being fixedly arranged on the inner wall of the coal mill; the stationary ring base 3 is positioned between the movable ring 2 and the inner wall of the coal mill; the stationary ring 4 is fixedly arranged on the stationary ring base 3; one side of the stationary ring 4 is provided with a lap joint part 41 extending towards the moving ring 2, and the lap joint part 41 is in dynamic seal fit connection with the moving ring 2; an axial gap 42 is provided between the lower end surface of the overlap 41 and the upper end surface of the movable ring 2.
Compared with the prior art, the wind ring structure for the coal mill provided by the utility model has the advantages that the static ring 4 is arranged above the movable ring 2 by the static ring base 3, the gap between the movable ring 2 and the static ring 4 is the axial gap 42 by the lap joint part 41 of the static ring 4 extending towards the static ring 4, and stone coal is not easy to enter the axial gap 42 by the axial gap 42, so that the abrasion between the movable ring 2 and the static ring 4 can be avoided; meanwhile, the outer side of the nozzle 21 on the movable ring 2 is higher than the inner side of the nozzle 21, so that the position of the axial gap 42 is improved, hot air has a tendency to flow inwards, and stone coal entering the axial gap 42 is effectively reduced; in this way, the gap between the movable ring 2 and the stationary ring 4 is changed from the radial gap to the axial gap 42, the axial gap 42 is higher than the nozzle 21 and the movable ring 2, stone coal is not easy to enter the axial gap 42, the abrasion of the movable ring 2 and the stationary ring 4 is avoided, and the high use efficiency of the pulverizer is ensured.
The movable ring 2 is in sealing connection with the movable ring base 1, and the through opening 11 and the nozzle 21 form a primary air passage. The top of the stationary ring 4 is provided with a pressing plate which is fixed on the stationary ring 4 by bolts. And meanwhile, the stationary ring 4 is in sealing connection with the inner wall of the coal mill through a packing.
The stationary ring base 3 is welded and fixed on the inner wall of the coal mill when being firstly installed, and stably supports the stationary ring 4.
Referring to fig. 1, as a specific embodiment of the wind ring structure for a coal mill provided by the utility model, a movable ring base 1, a movable ring 2, a stationary ring base 3 and a stationary ring 4 are formed by splicing a plurality of arc segments, and the number of the movable ring base 1, the movable ring 2, the stationary ring base 3 and the stationary ring 4 is a plurality; two adjacent arc sections are fixedly connected; the arc sections forming the movable ring base 1 are connected with the grinding disc through bolts, and the adjacent two arc sections are fastened through bolts, so that the integrity and the firmness of the movable ring base 1 are enhanced, and accidents caused by falling are prevented. Similarly, the plurality of arc segments forming the movable ring 2, the plurality of arc segments forming the stationary ring base 3 and the plurality of arc segments forming the stationary ring 4 are fixedly connected by bolts. And the stationary ring 4 is fixed on the stationary ring base 3 through bolts, and the moving ring 2 is fixed on the moving ring base 1 through bolts. Preferably, the number of the movable ring base 1, the movable ring 2, the stationary ring base 3 and the stationary ring 4 is 12. In this way, when one or a plurality of arc-shaped sections are severely worn, only partial replacement and repair are needed, and equipment maintenance materials and maintenance cost are reduced.
Referring to fig. 1, as a specific embodiment of the wind ring structure for a coal mill provided by the utility model, each movable ring 2 is detachably connected to a corresponding movable ring base 1, and each stationary ring 4 is detachably connected to a corresponding stationary ring base 3; by means of detachable connection, the movable ring 2 can be detached from the movable ring base 1 conveniently, and then replacement, repair and other works can be performed. The static ring 4 can be conveniently detached from the static ring base 3, and after a certain arc section on the static ring 4 is severely worn, the static ring can be quickly and conveniently replaced and maintained.
Referring to fig. 1, as a specific embodiment of the wind ring structure for a coal mill provided by the utility model, a side of a stationary ring 4, which is close to a grinding disc, is provided with an inclined flow guiding surface 43 for avoiding coal dust accumulation; by means of the inclined guide surface 43, the pulverized coal centrifugally moving outwards along with the rotation of the grinding disc slides downwards along the inclined guide surface 43 and is blown away by hot air sprayed from the nozzle 21, so that pulverized coal accumulation at the movable ring 2 and the stationary ring 4 is avoided, and pulverized coal ignition is prevented.
Referring to fig. 1, as a specific embodiment of the wind ring structure for coal mill provided by the present utility model, the cross-sectional area of the lower end of the through hole 11 is larger than the cross-sectional area of the upper end of the nozzle 21; the air duct structure with the large lower part and the small upper part extends upwards to form a venturi air duct molded line structure, so that the resistance of the lifting energy-saving device is reduced, the grinding pressure difference of the pulverizer is reduced, the acting force of the hot air blowing nozzle 21 is improved, the speed of hot air blowing is increased, and the primary air powder feeding efficiency is improved.
Referring to fig. 1, as a specific embodiment of the wind ring structure for coal mill provided by the present utility model, the axial gap 42 is 5-8mm; that is, the size of the axial gap 42 formed by the lower end face of the stationary ring 4 and the upper end face of the movable ring 2 is 5-8mm, so that abrasion of the movable ring 2 and the stationary ring 4 can be avoided, and the dynamic tightness of the two is better.
Referring to fig. 1, as a specific embodiment of the wind ring structure for a coal mill provided by the present utility model, a plurality of adjusting shims are disposed in the axial gap 42; the axial gap 42 between the movable ring 2 and the stationary ring 4 can be adjusted once when the dynamic and static gaps are changed and increased. When the axial gap 42 is greater than 10-15mm, the size of the axial gap 42 may be restored to 5-8mm by installing an adjustment shim within the axial gap 42. When the axial gap 42 increases again, the ring 2 and the stationary ring 4 need to be replaced.
Not shown in the drawings, the embodiment of the utility model also provides a coal mill, which comprises any one of the wind ring structures for the coal mill.
According to the coal mill provided by the utility model, the wind ring structure for the coal mill is adopted, the gap between the movable ring 2 and the static ring 4 is changed from the radial gap to the axial gap 42, the position of the axial gap 42 is higher than that of the nozzle 21 and the movable ring 2, stone coal is not easy to enter the axial gap 42, the abrasion of the movable ring 2 and the static ring 4 is avoided, and the higher service efficiency of the coal mill is ensured.
Not shown in the drawings, the embodiment of the utility model also provides a coal dust production line, which comprises any one of the coal mills.
According to the coal powder production line provided by the utility model, the coal mill is adopted, the gap between the movable ring 2 and the static ring 4 is changed from the radial gap to the axial gap 42, the axial gap 42 is higher than the nozzle 21 and the movable ring 2, stone coal is not easy to enter the axial gap 42, the condition that the movable ring 2 and the static ring 4 are worn is avoided, the higher service efficiency of the coal mill is ensured, and the coal powder production line is enabled to work efficiently.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (9)
1. The utility model provides a wind ring structure for coal pulverizer which characterized in that includes:
the movable ring base is arranged in the coal mill and surrounds the grinding disc, and is fixedly connected with the grinding disc; the movable ring base is provided with a through hole which is arranged from bottom to top;
the movable ring is fixedly arranged on the movable ring base; the movable ring is provided with a nozzle which is arranged from bottom to top, and the nozzle is communicated with the through hole; one side of the nozzle close to the grinding disc is lower than one side of the nozzle far away from the grinding disc;
the stationary ring base is fixedly arranged on the inner wall of the coal mill; the static ring base is positioned between the movable ring and the inner wall of the coal mill;
the stationary ring is fixedly arranged on the stationary ring base; one side of the stationary ring is provided with a lap joint part extending towards the movable ring, and the lap joint part is in dynamic seal fit connection with the movable ring; an axial gap is formed between the lower end face of the lap joint part and the upper end face of the movable ring.
2. The wind ring structure for coal mill of claim 1, wherein the movable ring base, the movable ring, the stationary ring base and the stationary ring are formed by splicing a plurality of arc segments, and the number of the movable ring base, the movable ring, the stationary ring base and the stationary ring is a plurality; and two adjacent arc sections are fixedly connected.
3. The wind ring structure for coal pulverizer as recited in claim 2, wherein each said movable ring is detachably connected to a corresponding said movable ring base, and each said stationary ring is detachably connected to a corresponding said stationary ring base.
4. The wind ring structure for coal mill according to claim 1, wherein the static ring is provided with an inclined guide surface for preventing coal dust from accumulating on one side close to the grinding disc.
5. The wind ring structure for a coal pulverizer as claimed in claim 1, wherein a cross-sectional area of the lower end of the through-hole is larger than a cross-sectional area of the upper end of the nozzle.
6. The wind ring structure for coal pulverizer as in claim 1, wherein said axial gap is 5-8mm.
7. The wind ring structure for coal mill of claim 6, wherein a plurality of adjusting shims are provided in the axial gap.
8. A coal mill comprising the wind ring structure for a coal mill according to any one of claims 1 to 7.
9. A coal dust production line comprising the coal pulverizer of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321505194.1U CN220091574U (en) | 2023-06-13 | 2023-06-13 | Air ring structure for coal mill, coal mill and coal powder production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321505194.1U CN220091574U (en) | 2023-06-13 | 2023-06-13 | Air ring structure for coal mill, coal mill and coal powder production line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220091574U true CN220091574U (en) | 2023-11-28 |
Family
ID=88847686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321505194.1U Active CN220091574U (en) | 2023-06-13 | 2023-06-13 | Air ring structure for coal mill, coal mill and coal powder production line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220091574U (en) |
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2023
- 2023-06-13 CN CN202321505194.1U patent/CN220091574U/en active Active
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