Anti-abrasion device for coal mill

Abstract

The utility model relates to the technical field of coal mills, and provides an anti-wear device for a coal mill, which comprises base layers sequentially arranged on the cylinder wall of the coal mill in the circumferential direction and the axial direction, wear-resistant layers are arranged on the sides, away from the cylinder wall of the coal mill, of the base layers, first through holes are formed in the base layers, and second through holes are formed in the wear-resistant layers. A round nut is arranged in the first through hole, one end of the round nut is fixedly connected with the cylinder wall of the coal mill, the other end of the round nut extends into the second through hole, a bolt matched with the round nut is arranged in the second through hole, and a first through groove and a second through groove are formed in the side, away from the base layer, of the wear-resisting layer. The first through groove and the second through groove are located in the two sides of the second through hole respectively, a connecting piece is arranged between every two adjacent wear-resisting layers, the two ends of each connecting piece penetrate through the corresponding first through groove and the corresponding second through groove respectively, the ends of the connecting pieces are fixed to round nuts through bolts, and plugging pieces are arranged on the sides, away from the base layer, of the wear-resisting layers. The connecting piece is simple in structure, and the connecting piece can be conveniently mounted and dismounted.

Description

Technical Field

[0001] The present application relates to the technical field of coal mills, and in particular to an anti-wear device for a coal mill. Background Art

[0002] A coal mill is a machine that breaks coal lumps into pieces and grinds them into coal powder. During the coal grinding process, an anti-wear structure is usually provided on the cylinder wall of the coal mill.

[0003] The prior art CN219377434U discloses a steel locking plate ceramic anti-wear device applied to a coal mill, comprising a rectangular ceramic plate, a plurality of ceramic plates arranged in sequence along the circumferential direction and the axial direction on the wall of the coal mill barrel, a rectangular hole for inserting the stainless steel locking plate is opened in the transverse direction of the ceramic plate, a circular hole for inserting the bolt is opened in the axial direction of the ceramic plate, the bolt is blocked by a ceramic plug, the bolts connect the ceramic plates in series to form a ceramic anti-wear plate belt, and then the ceramic anti-wear plate belt is connected and locked with a round nut welded on the wall of the coal mill barrel to enhance the bonding force between the ceramic plate and the wall of the coal mill barrel, and can effectively prevent the ceramic plate from falling off due to vibration, scouring and high temperature during use. The present application has a simple structure, good stability, is not easy to fall off, has a good application effect, and is easy to process, manufacture and install.

[0004] As the coal material will continuously wash the ceramic plates when the coal mill is grinding coal, the coal mill needs to be regularly inspected and repaired to replace the ceramic plates that can no longer be used. However, in the above-mentioned prior art anti-wear device, the stainless steel locking plates are laterally inserted into the rectangular holes on the ceramic plates, which makes it inconvenient to remove the stainless steel locking plates when disassembling and replacing the ceramic plates. Therefore, multiple ceramic plates need to be disassembled as a whole, which increases the workload and work intensity of the staff and is quite inconvenient. Summary of the invention

[0005] The purpose of the embodiment of the present application is to provide an anti-wear device for a coal mill, by providing a base layer and a wear-resistant layer, and providing a first through groove and a second through groove on the wear-resistant layer for the connecting piece to pass through, so as to facilitate the installation and disassembly of the connecting piece.

[0006] The embodiment of the present application provides an anti-wear device for a coal mill, which adopts the following technical solutions:

[0007] An anti-wear device for a coal mill, comprising a base layer sequentially arranged on the wall of a coal mill barrel in an annular direction and an axial direction, a wear-resistant layer being arranged on a side of the base layer away from the wall of the coal mill barrel, a first through hole being arranged on the base layer, a second through hole being arranged on the wear-resistant layer, a round nut being arranged in the first through hole, one end of the round nut being fixedly connected to the wall of the coal mill barrel, the other end of the round nut extending into the second through hole, a bolt matching the round nut being arranged in the second through hole;

[0008] A first through groove and a second through groove are provided on the side of the wear-resistant layer away from the base layer, and the first through groove and the second through groove are respectively located on both sides of the second through hole, a connecting piece is provided between two adjacent wear-resistant layers, two ends of the connecting piece respectively pass through the first through groove and the second through groove, and the end of the connecting piece is fixed to the round nut by the bolt, and a sealing piece is provided on the side of the wear-resistant layer away from the base layer, and the sealing piece covers the second through hole, the first through groove and the second through groove.

[0009] Preferably, both the first through hole and the second through hole are circular structures.

[0010] Preferably, a diameter of the second through hole is larger than a groove width of the first through groove and a groove width of the second through groove.

[0011] Preferably, the first through groove and the second through groove have the same shape and structure, the first through groove is a stepped structure, and the groove width of the first through groove at one end close to the wear-resistant layer is greater than the groove width of the first through groove at one end away from the wear-resistant layer.

[0012] Preferably, the base layer, the wear-resistant layer and the sealing member are all ceramic sheets, and the material of the ceramic sheets is alumina, which is a wear-resistant material.

[0013] Preferably, the connecting piece is configured as a stainless steel locking piece.

[0014] Preferably, a groove is provided at one end of the bolt away from the round nut, and the groove is a polygonal structure.

[0015] Preferably, the round nut is fixed to the coal mill barrel wall by welding.

[0016] Preferably, a plurality of protrusions are provided on a side of the wear-resistant layer away from the base layer.

[0017] Beneficial effects of this application:

[0018] Compared with the prior art, the present application provides a base layer and a wear-resistant layer, and provides a first through groove and a second through groove on the wear-resistant layer for the connecting member to pass through, thereby facilitating installation and removal of the connecting member.

[0019] After the connecting piece is fixed to the round nut by bolts, the wear-resistant layers are connected in series to form a wear-resistant plate belt, which enhances the bonding force between the wear-resistant layer and the wall of the coal mill barrel and can effectively prevent the wear-resistant layer from falling off due to vibration, erosion and high temperature during use. The second through hole, the first through groove and the second through groove are blocked by the blocking piece.

[0020] When the wear-resistant layer needs to be replaced, remove the sealing piece on the corresponding wear-resistant layer, unscrew the bolt from the round nut, remove the connecting piece, and then remove the wear-resistant layer. After reinstalling the wear-resistant layer, place the connecting piece on the round nut and fix it with the bolt again, thereby improving the efficiency of disassembly and replacement of the wear-resistant layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the structure of some embodiments of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the wear-resistant layer in some embodiments of the utility model;

[0024] Figure 3 It is a schematic diagram of the structure of the base layer in some embodiments of the utility model;

[0025] Figure 4 A top view of the wear-resistant layer in some embodiments of the utility model;

[0026] Figure 5 It is a side view of the wear-resistant layer in some embodiments of the utility model.

[0027] The reference numerals are:

[0028] 1. Base layer; 2. Wear-resistant layer; 3. First through hole; 4. Second through hole; 5. Round nut; 6. Bolt; 7. First through groove; 8. Second through groove; 9. Connector; 10. Sealing member; 11. Groove; 12. Protrusion; 13. Coal mill barrel wall; 14. Ceramic glue. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] like Figure 1-5As shown, the anti-wear device for a coal mill described in the embodiment of the present application includes a base layer 1 arranged in sequence along the circumferential direction and the axial direction on the wall of the coal mill barrel, a wear-resistant layer 2 is provided on the side of the base layer 1 away from the wall of the coal mill barrel, a first through hole 3 is provided on the base layer 1, a second through hole 4 is provided on the wear-resistant layer 2, a round nut 5 is provided in the first through hole 3, one end of the round nut 5 is fixedly connected to the wall of the coal mill barrel, and the other end of the round nut 5 extends into the second through hole 4, a bolt 6 adapted to the round nut 5 is provided in the second through hole 4, and both the round nut 5 and the bolt 6 are made of high temperature resistant and wear-resistant 12Cr13 material.

[0036] A first through groove 7 and a second through groove 8 are provided on the side of the wear-resistant layer 2 away from the base layer 1. The first through groove 7 and the second through groove 8 are respectively located on both sides of the second through hole 4. A connecting piece 9 is provided between two adjacent wear-resistant layers 2. Both ends of the connecting piece 9 pass through the first through groove 7 and the second through groove 8 respectively. Both ends of the connecting piece 9 are provided with openings. The ends of the connecting piece 9 are fixed to the round nut 5 by bolts 6. At this time, the bolts 6 pass through the openings. A sealing piece 10 is provided on the side of the wear-resistant layer 2 away from the base layer 1. The sealing piece 10 covers the second through hole 4, the first through groove 7 and the second through groove 8. The base layer 1 and the coal mill barrel wall, the base layer 1 and the base layer 1, the base layer 1 and the round nut 5, the base layer 1 and the wear-resistant layer 2, and the wear-resistant layer 2 and the sealing piece 10 are all connected by ceramic glue 14. The ceramic glue 14 is LT191 medium-temperature wear-resistant ceramic glue.

[0037] When installing the anti-wear device, first weld the round nut 5 to the coal mill barrel wall 13, insert the base layer 1 into the round nut 5, and then use ceramic glue 14 to bond and fix the base layer 1 to the coal mill barrel wall 13 and the base layer 1 to the round nut 5, then weld the next round nut 5, and bond and fix the two adjacent base layers 1 with ceramic glue 14, and then repeat the above steps until the installation of the base layer 1 is completed.

[0038] After completing the installation of the base layer 1, the wear-resistant layer 2 is inserted into the round nut 5, and the base layer 1 and the wear-resistant layer 2 are bonded and fixed by ceramic glue 14, and then one end of the two connecting pieces 9 is fixed on the round nut 5 by bolts 6, and then the other end of the connecting piece 9 is respectively installed on an adjacent round nut 5, and the above steps are repeated until the installation of the wear-resistant layer 2 is completed. Finally, each adjacent wear-resistant layer 2 is connected in series to form an anti-wear plate belt to enhance the bonding force between the wear-resistant layer 2 and the coal mill barrel wall 3, which can effectively prevent the wear-resistant layer 2 from falling off due to vibration, erosion and high temperature during use. After completing the installation of the wear-resistant layer 2, the side of the wear-resistant layer 2 away from the base layer 1 (the second through hole 4, the first through groove 7 and the second through groove 8) is sealed with a sealing piece 10.

[0039] When the wear-resistant layer 2 needs to be replaced, remove the sealing piece 10 on the corresponding wear-resistant layer 2, unscrew the bolt 6 from the round nut 5, remove the connecting piece 9, and then remove the wear-resistant layer 2. After reinstalling the wear-resistant layer 2, place the connecting piece 9 on the round nut 5 and fix it with the bolt 6 again, thereby improving the efficiency of disassembly and replacement of the wear-resistant layer 2.

[0040] In this embodiment, the first through hole 3 and the second through hole 4 are both circular structures, and the diameter of the second through hole 4 is larger than the groove width of the first through groove 7 and the groove width of the second through groove 8, thereby improving the alignment accuracy between the sealing member 10 and the wear-resistant layer 2.

[0041] In this embodiment, the first through groove 7 and the second through groove 8 have the same shape and structure. The first through groove 7 is a stepped structure. The groove width of the first through groove 7 at one end close to the wear-resistant layer 2 is greater than the groove width of the first through groove 7 at one end away from the wear-resistant layer 2. The first through groove 7 and the second through groove 8 support the sealing member 10 while increasing the contact surface with the sealing member 10, thereby improving the stability of the connection between the sealing member 10 and the wear-resistant layer 2.

[0042] In this embodiment, the base layer 1, the wear-resistant layer 2 and the sealing member 10 are all ceramic sheets. The material of the ceramic sheets is alumina, specifically, aluminum oxide with a content greater than 95%, a volume density greater than or equal to 3.66 g / cm3, and is a wear-resistant material.

[0043] In this embodiment, the connecting member 9 is configured as a stainless steel locking piece, and the stainless steel locking piece is made of high temperature resistant and wear resistant 12Cr13 material.

[0044] In this embodiment, a groove 11 is provided at one end of the bolt 6 away from the round nut 5 . The groove 11 has a polygonal structure, which facilitates the disassembly of the bolt 6 .

[0045] In this embodiment, the round nut 5 is fixed to the coal mill barrel wall 13 by welding.

[0046] In this embodiment, a plurality of protrusions 12 are provided on the side of the wear-resistant layer 2 away from the base layer 1 to mitigate the impact of high-speed particles inside the coal mill on the wear-resistant layer 2, thereby protecting the wear-resistant layer 2 from damage.

[0047] The working principle of an anti-wear device for a coal mill in the embodiment of the present application is as follows:

[0048] During installation, first weld the round nut 5 to the coal mill barrel wall 13, insert the base layer 1 into the round nut 5, and then use ceramic glue 14 to bond and fix the base layer 1 to the coal mill barrel wall 13 and the base layer 1 to the round nut 5, then weld the next round nut 5, and bond and fix the two adjacent base layers 1 with ceramic glue 14, and then repeat the above steps until the installation of the base layer 1 is completed.

[0049] After completing the installation of the base layer 1, the wear-resistant layer 2 is inserted into the round nut 5, and the base layer 1 and the wear-resistant layer 2 are bonded and fixed by ceramic glue 14, and then one end of the two connecting pieces 9 is fixed on the round nut 5 by bolts 6, and then the other end of the connecting piece 9 is respectively installed on an adjacent round nut 5, and the above steps are repeated until the installation of the wear-resistant layer 2 is completed. Finally, each adjacent wear-resistant layer 2 is connected in series to form an anti-wear plate belt to enhance the bonding force between the wear-resistant layer 2 and the coal mill barrel wall 13, which can effectively prevent the wear-resistant layer 2 from falling off due to vibration, erosion and high temperature during use. After completing the installation of the wear-resistant layer 2, the side of the wear-resistant layer 2 away from the base layer 1 (the second through hole 4, the first through groove 7 and the second through groove 8) is sealed with a sealing piece 10.

[0050] When the wear-resistant layer 2 needs to be replaced, remove the sealing piece 10 on the corresponding wear-resistant layer 2, unscrew the bolt 6 from the round nut 5, remove the connecting piece 9, and then remove the wear-resistant layer 2. After reinstalling the wear-resistant layer 2, place the connecting piece 9 on the round nut 5 and fix it with the bolt 6 again, thereby improving the efficiency of disassembly and replacement of the wear-resistant layer 2.

[0051] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An anti-wear device for a coal mill, characterized in that: It comprises a base layer sequentially arranged on the coal mill barrel wall in the annular direction and the axial direction, a wear-resistant layer is arranged on the side of the base layer away from the coal mill barrel wall, a first through hole is arranged on the base layer, a second through hole is arranged on the wear-resistant layer, a round nut is arranged in the first through hole, one end of the round nut is fixedly connected to the coal mill barrel wall, the other end of the round nut extends into the second through hole, and a bolt adapted to the round nut is arranged in the second through hole; A first through groove and a second through groove are provided on the side of the wear-resistant layer away from the base layer, and the first through groove and the second through groove are respectively located on both sides of the second through hole, a connecting piece is provided between two adjacent wear-resistant layers, two ends of the connecting piece respectively pass through the first through groove and the second through groove, and the end of the connecting piece is fixed to the round nut by the bolt, and a sealing piece is provided on the side of the wear-resistant layer away from the base layer, and the sealing piece covers the second through hole, the first through groove and the second through groove.

2. The anti-wear device for a coal mill according to claim 1, characterized in that: The first through hole and the second through hole are both circular structures.

3. The anti-wear device for a coal mill according to claim 2, characterized in that: The diameter of the second through hole is larger than the groove width of the first through groove and the groove width of the second through groove.

4. The anti-wear device for a coal mill according to claim 1, characterized in that: The first through groove and the second through groove have the same shape and structure. The first through groove is a stepped structure. The groove width of the first through groove at one end close to the wear-resistant layer is greater than the groove width of the first through groove at one end away from the wear-resistant layer.

5. The anti-wear device for a coal mill according to claim 1, characterized in that: The base layer, the wear-resistant layer and the sealing member are all ceramic sheets, and the material of the ceramic sheets is alumina, which is a wear-resistant material.

6. The anti-wear device for a coal mill according to claim 1, characterized in that: The connecting piece is configured as a stainless steel locking piece.

7. The anti-wear device for a coal mill according to claim 1, characterized in that: A groove is arranged at one end of the bolt away from the round nut, and the groove has a polygonal structure.

8. The anti-wear device for a coal mill according to claim 1, characterized in that: The round nut is fixed to the coal mill barrel wall by welding.

9. The anti-wear device for a coal mill according to claim 1, characterized in that: A plurality of protrusions are arranged on a side of the wear-resistant layer away from the base layer.

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