Air ring structure of a cement vertical mill

Abstract

The utility model relates to the technical field of cement vertical mills, and in particular to an air ring structure of a cement vertical mill, comprising a mill shell, a first ring plate is provided at the inner edge position of the mill shell, and a first air ring is provided at the bottom end of the first ring plate through integral molding, an air guide plate is fixedly connected to a middle and lower position of one side of the first air ring, and a second air ring is fixedly connected to a side position of the air guide plate away from the first air ring. In the utility model, the plug plate, the first fixed bracket, the second fixed bracket and the sealing gasket are provided, so that it is convenient for the air ring structure of the cement vertical mill to be assembled and used in a segmented manner, and the connection between adjacent groups of air rings is sealed and blocked by a spliced ​​sealing structure to prevent abrasive from flying and diffusing into the connection gap to cause accumulation, avoid the phenomenon that it is inconvenient to reinstall a new air ring structure into the equipment later due to the accumulation of powder, and reduce the tediousness and difficulty of conventional replacement of the air ring structure.

Description

Technical Field

[0001] The utility model relates to the technical field of cement vertical mills, in particular to an air ring structure of a cement vertical mill. Background Art

[0002] Cement vertical mill is a key equipment in cement production line, mainly used for the production of cement raw materials. It is a vertical cylindrical mill. The air ring structure is one of the important components of cement vertical mill equipment. It refers to a ring-shaped component installed under the grinding disc. The air ring structure will bring the abrasive into the grinding disc for effective grinding by providing airflow.

[0003] At present, in the existing technology, most power plants use a segmented air ring structure, which supports partial disassembly and replacement, and can reduce the difficulty of repairing and maintaining the air ring structure. However, since powder is easy to fly and spread during the rolling and grinding process, if the powder accidentally falls into the joint of the air ring structure, in the subsequent independent replacement of the local air ring structure, the accumulation of powder will not be convenient for reinstalling the new air ring structure into the equipment, and the powder needs to be pre-cleaned and taken out, which will increase the cumbersomeness of conventional replacement of the air ring structure. Therefore, an air ring structure for a cement vertical mill is proposed to address the above problems. Utility Model Content

[0004] The utility model aims to provide an air ring structure for a cement vertical mill, so as to solve the problem in the prior art proposed in the above background technology that when disassembling and replacing the segmented air ring structure, powder will accumulate in the connecting gap, resulting in cumbersome and increased difficulty in replacing the air ring structure.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A wind ring structure for a cement vertical mill comprises a mill shell, wherein a first ring plate is provided at an inner edge position of the mill shell, and a first wind ring is provided at the bottom end of the first ring plate through integral molding, an air guide plate is fixedly connected to a middle and lower position on one side of the first wind ring, and a second wind ring is fixedly connected to a side position of the air guide plate away from the first wind ring, a second ring plate is fixedly connected to one end of the second wind ring, a reserved slot is provided at the connecting end position of the second ring plate and the second wind ring, and a plug plate is inserted into the inner side of the reserved slot, a first fixed bracket is fixedly connected to a rear end side position of the plug plate, and a second fixed bracket is fixedly connected to the other side of the rear end of the plug plate, and a sealing gasket is bonded to the front end of the first fixed bracket.

[0007] Preferably, fastening holes are respectively formed on the surfaces of the first ring plate and the second ring plate through integral molding, and the fastening holes are distributed in a ring array structure.

[0008] Preferably, a device grinding disc body is provided behind the second ring plate, and the device grinding disc body is arranged at the middle position of the inner side of the mill housing, and the second ring plate and the device grinding disc body are arranged in front and back abutment.

[0009] Preferably, the air guide vanes are distributed in a ring array structure along the center point of the mill housing, the first air ring and the second air ring are coaxially arranged, and the connection between the second air ring and the first air ring forms an air duct structure.

[0010] Preferably, the inner end of the reserved card slot and the outer end of the plug plate are matched in shape, the first fixed bracket and the second fixed bracket are respectively "L"-shaped structures, and the vertical end surfaces of the first fixed bracket and the second fixed bracket are respectively provided with circular hole grooves fixedly connected to the first ring plate bolts, and the sealing surface of the sealing gasket is arranged to face the inner side of the second air ring.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the utility model, by providing the plug plate, the first fixed bracket, the second fixed bracket and the sealing gasket, it is convenient for the air ring structure of the cement vertical mill to be assembled and used in a segmented manner. The spliced ​​sealing structure composed of the plug plate, the first fixed bracket, the second fixed bracket and the sealing gasket is pre-assembled to the connection of an adjacent group of air rings to seal the connection to prevent the abrasive from flying and diffusing into the connection gap to cause accumulation. By being able to perform auxiliary sealing treatment during the use of the segmented air ring structure, the phenomenon of subsequent inconvenience in re-installing the new air ring structure into the equipment due to the accumulation of powder can be avoided, and the tediousness and difficulty of conventional replacement of the air ring structure can be reduced, thereby accelerating the progress of partial disassembly and replacement operations of the air ring structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the first air ring of the utility model;

[0015] Figure 3 For this utility model Figure 2 A schematic diagram of the structure at A;

[0016] Figure 4 It is a schematic diagram of the structure of the first fixing bracket and the second fixing bracket of the utility model.

[0017] In the figure: 1. mill housing; 2. first ring plate; 3. first air ring; 4. air guide vane; 5. second air ring; 6. second ring plate; 7. reserved slot; 8. plug-in plate; 9. first fixed bracket; 10. second fixed bracket; 11. sealing gasket; 12. fastening hole groove; 13. equipment grinding disc body. DETAILED DESCRIPTION

[0018] 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 in 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.

[0019] See also Figure 1-4 , the utility model provides a technical solution:

[0020] A wind ring structure for a cement vertical mill comprises a mill housing 1, a first ring plate 2 is provided at the inner edge of the mill housing 1, and a first wind ring 3 is provided at the bottom end of the first ring plate 2 through integral molding, an air guide plate 4 is fixedly connected to a middle and lower position on one side of the first wind ring 3, and a second wind ring 5 is fixedly connected to a side of the air guide plate 4 away from the first wind ring 3, one end of the second wind ring 5 is fixedly connected to a second ring plate 6, a reserved card slot 7 is provided at the connecting end position of the second ring plate 6 and the second wind ring 5, and a plug plate 8 is inserted into the inner side of the reserved card slot 7, a first fixed bracket 9 is fixedly connected to one side of the rear end of the plug plate 8, and a second fixed bracket 10 is fixedly connected to the other side of the rear end of the plug plate 8, and a sealing gasket 11 is bonded to the front end of the first fixed bracket 9.

[0021] like Figure 1 and Figure 2As shown, the surfaces of the first ring plate 2 and the second ring plate 6 are respectively provided with fastening holes 12 through integral molding, and the fastening holes 12 are distributed in a ring array structure. After ensuring that the single-section air ring fits into the mill housing 1, the first ring plate 2 and the mill housing 1 and the second ring plate 6 and the equipment grinding disc body 13 can be bolted and connected respectively, so that the single-section air ring is fastened and limited; the equipment grinding disc body 13 is provided behind the second ring plate 6, and the equipment grinding disc body 13 is arranged in the middle position of the inner side of the mill housing 1, and the second ring plate 6 and the equipment grinding disc body 13 are arranged in a front-to-back abutment with each other, and the second ring plate 6 and the equipment grinding disc body 13 are connected. After the main body 13 is in abutment contact and fixedly connected by bolts, the air ring structure and the grinding disc structure will be mechanically connected, so that the air ring structure can provide stable airflow to the grinding disc later; the air guide vanes 4 are distributed in a circular array structure along the center point of the mill housing 1, the first air ring 3 and the second air ring 5 are coaxially arranged, and the connection between the second air ring 5 and the first air ring 3 forms an air duct structure. After the first air ring 3 and the second air ring 5 are connected together by multiple air guide vanes 4, multiple air ducts will be formed between the second air ring 5 and the first air ring 3, so that subsequent air can flow through the air ducts and form airflow that is beneficial to abrasive grinding.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the inner end of the reserved slot 7 and the outer end of the plug plate 8 are matched in shape, the first fixing bracket 9 and the second fixing bracket 10 are respectively "L"-shaped structures, and the vertical end surfaces of the first fixing bracket 9 and the second fixing bracket 10 are respectively provided with circular hole grooves that are bolted and fixedly connected to the first ring plate 2, and the sealing surface of the sealing gasket 11 is arranged toward the inner side of the second air ring 5. After ensuring that an adjacent group of air ring structures are assembled and spliced ​​by plugging and installing the plug plate 8, the first fixing bracket 9, the second fixing bracket 10 and the adjacent group of air ring structures can be connected together by bolt fixings, thereby limiting the sealing structure installed at the position of the air ring connection.

[0023] Working process: When using the air ring structure of the cement vertical mill, firstly, the multi-section air ring can be assembled into the mill housing 1 in sequence by means of segmented assembly, and the first ring plate 2 and the mill housing 1 and the second ring plate 6 and the equipment grinding disc body 13 are connected simultaneously by means of multiple bolt fixings, so that the air ring structure is fastened and limited. Then, when the cement vertical mill equipment is started and operated to realize the crushing and grinding operation of the powder, the multi-section air ring structure mainly composed of the first ring plate 2, the first air ring 3, the air guide plate 4, the second air ring 5 and the second ring plate 6 will provide airflow to the inside of the equipment by means of the conduction between the air duct and the inside of the equipment, so that the abrasive can be brought into the equipment grinding disc body 13 for grinding. Effective grinding treatment, because when the multiple sections of air rings are respectively installed in the mill housing 1, the adjacent groups of air rings can be spliced ​​together by a single plug plate 8, and after the first fixed bracket 9 and the second fixed bracket 10 are respectively bolted to limit the adjacent group of air ring structures, the splicing sealing structure composed of the plug plate 8, the first fixed bracket 9, the second fixed bracket 10 and the sealing gasket 11 can be installed at the connection of the adjacent group of air rings. This structural setting will seal the connection of the adjacent group of air rings when the equipment is performing a grinding operation on the abrasive, preventing the abrasive from flying and diffusing into the connection gap to cause accumulation and hindering the subsequent rapid installation of the air ring structure.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air ring structure for a cement vertical mill, comprising a mill housing (1), characterized in that: A first ring plate (2) is provided at the inner edge of the mill housing (1), and a first air ring (3) is integrally formed at the bottom of the first ring plate (2); an air guide plate (4) is fixedly connected to a middle and lower position of one side of the first air ring (3), and a second air ring (5) is fixedly connected to a side of the air guide plate (4) away from the first air ring (3); a second ring plate (6) is fixedly connected to one end of the second air ring (5); a reserved slot (7) is provided at a connection end of the second ring plate (6) and the second air ring (5), and a plug plate (8) is plugged into the inner side of the reserved slot (7); a first fixed bracket (9) is fixedly connected to one side of the rear end of the plug plate (8), and a second fixed bracket (10) is fixedly connected to the other side of the rear end of the plug plate (8); a sealing gasket (11) is bonded to the front end of the first fixed bracket (9).

2. The air ring structure of a cement vertical mill according to claim 1 is characterized in that: The surfaces of the first ring plate (2) and the second ring plate (6) are respectively provided with fastening holes (12) through integral molding, and the fastening holes (12) are distributed in a ring array structure.

3. The air ring structure of a cement vertical mill according to claim 1 is characterized in that: A device grinding disc body (13) is provided behind the second ring plate (6), and the device grinding disc body (13) is arranged at a middle position inside the grinding machine housing (1), and the second ring plate (6) and the device grinding disc body (13) are arranged in a front-to-back abutment relationship.

4. The air ring structure of a cement vertical mill according to claim 1 is characterized in that: The air guide blades (4) are distributed in a ring array structure along the center point of the mill housing (1); the first air ring (3) and the second air ring (5) are coaxially arranged; and the second air ring (5) and the first air ring (3) are connected to form an air duct structure.

5. The air ring structure of a cement vertical mill according to claim 1 is characterized in that: The inner end of the reserved slot (7) and the outer end of the plug plate (8) are arranged to match each other in shape, the first fixing bracket (9) and the second fixing bracket (10) are respectively L-shaped in appearance, and the vertical end surfaces of the first fixing bracket (9) and the second fixing bracket (10) are respectively provided with circular hole grooves that are bolted to the first ring plate (2), and the sealing surface of the sealing gasket (11) is arranged to face the inner side of the second air ring (5).

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