On-line welding repair structure for reinforcing flange of cylinder of large ball mill

Abstract

The utility model discloses an on-line welding repair structure for reinforcing a flange of a large ball mill cylinder, which comprises a flange reinforcing part, a manhole reinforcing part and a pore plate reinforcing part, the flange reinforcing part is arranged corresponding to a connecting flange group so as to reinforce the connecting flange group, and the manhole reinforcing part is arranged corresponding to a manhole so as to reinforce the manhole. The pore plate reinforcing part is arranged corresponding to the manhole plate so as to reinforce the connection state between the manhole plate and the large ball mill barrel; the device can quickly implement and complete integral reinforcement welding repair on fatigue cracks occurring at the roots of the large ball mill barrel and the flange, reduces maintenance of the large ball mill barrel through replacement, is safe and easy to operate, stable in welding quality, low in investment cost, high in working efficiency and high in reliability, and meets actual field requirements. And moreover, the maintenance cost is greatly reduced, the shutdown loss is reduced, a guarantee is provided for reasonable group production, and meanwhile, a scientific reference basis is provided for on-line repair of other large workpieces.

Description

Technical Field

[0001] The utility model relates to the technical field of ball mill welding repair, in particular to an online welding repair structure for reinforcing a cylinder flange of a large ball mill. Background Art

[0002] Large ball mill is the core equipment of mineral processing. It has a circular cylinder with end caps with hollow shaft necks at both ends of the cylinder. The shaft necks of the end caps are supported on bearings. The motor rotates the ball mill through the gears installed on the cylinder. The cylinder is filled with grinding media (steel balls, steel rods or gravel, etc.) and ore to be ground, and the total loading volume is 25-45% of the effective volume of the cylinder. When the cylinder rotates around the horizontal axis at a specified speed, the grinding media and ore in the cylinder are lifted to a certain height by the cylinder lining under the action of centrifugal force and friction, and then fall or fall freely from the cylinder wall, so that the ore is crushed by impact and grinding. The ore is continuously fed from the hollow shaft neck at one end of the cylinder, and the ground product is continuously discharged through the hollow shaft neck at the other end of the cylinder. The movement of the ore in the cylinder is achieved by the pressure of the continuous feeding of the ore.

[0003] Due to long-term heavy-load operation, possible design deviations of the original cylinder material and process defects in the manufacturing of the equipment, fatigue cracks appear on the surface of the ball mill cylinder, the root of the flange and the periphery of the manhole. If not handled in time, the cylinder and flange may break as a whole, resulting in downtime losses. Due to the large size of the ball mill, it is difficult to disassemble, hoist and transport it. On-site replacement and spare parts procurement take a long time, which greatly affects the normal production.

[0004] In view of the above-mentioned defects, the inventor of the present invention finally obtained the present invention after a long period of research and practice. Utility Model Content

[0005] In order to solve the above-mentioned technical defects, the technical solution adopted by the utility model is to provide an online welding repair structure for reinforcing the flange of a large ball mill cylinder, which is used to reinforce the cylinder of a large ball mill. The large ball mill cylinder is provided with a connecting flange group and a manhole, and the manhole is also provided with a manhole plate for sealing the manhole. The online welding repair structure for reinforcing the flange of the large ball mill cylinder includes a flange reinforcement part, a manhole reinforcement part and an orifice plate reinforcement part. The flange reinforcement part is arranged corresponding to the connecting flange group to reinforce the connecting flange group, the manhole reinforcement part is arranged corresponding to the manhole to reinforce the manhole, and the orifice plate reinforcement part is arranged corresponding to the manhole plate to reinforce the connection state between the manhole plate and the cylinder of the large ball mill.

[0006] Preferably, the connecting flange group includes a plurality of connecting flanges, the flange reinforcement portion includes a plurality of reinforcement flanges, the connecting flanges and the reinforcement flanges are arranged in one-to-one correspondence, and the connecting flanges, the reinforcement flanges and the large ball mill cylinder are arranged coaxially, the reinforcement flange is arranged as an annular structure, the inner ring of the reinforcement flange is fixedly connected to the outer wall of the large ball mill cylinder, and a plurality of reinforcing ribs are arranged between the corresponding connecting flanges and the reinforcement flanges, the two ends of the reinforcing ribs are respectively fixedly connected to the corresponding connecting flanges and the reinforcement flanges, and the bottom of the reinforcing ribs is fixedly connected to the outer wall of the large ball mill cylinder.

[0007] Preferably, the reinforcing rib plates are evenly distributed in a ring shape between the corresponding connecting flanges and the reinforcing flanges with the axis of the large ball mill cylinder as the center.

[0008] Preferably, the manhole is arranged between two adjacent connecting flanges, and the manhole is arranged between two adjacent reinforcing flanges, the manhole reinforcement part includes a reinforcing frame and a reinforcing connecting block, the reinforcing frame is arranged as a rectangular frame, and the reinforcing frame is fixedly arranged on the outer wall of the large ball mill cylinder, the manhole is arranged in the reinforcing frame, the two ends of the reinforcing connecting block are respectively fixedly connected to the reinforcing frame and the reinforcing flange, and the reinforcing connecting block is fixedly connected to the outer wall of the large ball mill cylinder.

[0009] Preferably, the reinforcement frame includes two first fixed plates and two second fixed plates, the extension direction of the first fixed plates is consistent with the axis of the large ball mill cylinder, the second fixed plates are vertically connected to the first fixed plates to form a rectangular frame structure, and the second fixed plates are connected to the reinforcement flange through the reinforcement connecting block.

[0010] Preferably, a plurality of the reinforcement connection blocks are provided on the same second fixing plate and are fixedly connected to the same reinforcement flange.

[0011] Preferably, the orifice plate reinforcement portion includes an orifice plate reinforcement frame and a locking block, the orifice plate reinforcement frame is fixedly arranged on the manhole plate, and the orifice plate reinforcement frame is fixedly connected to the reinforcement frame via the locking block.

[0012] Preferably, the orifice plate reinforcement frame includes two first reinforcement plates, two second reinforcement plates and one third reinforcement plate, the extension direction of the first reinforcement plate is consistent with the axis of the large ball mill cylinder, the third reinforcement plate is arranged between the two first reinforcement plates, and the two ends of the third reinforcement plate are respectively vertically fixed to the two first reinforcement plates, the two ends of the first reinforcement plate are respectively vertically fixed to the two second reinforcement plates, and the first reinforcement plate, the second reinforcement plate and the third reinforcement plate are all fixedly arranged on the manhole plate to form the orifice plate reinforcement frame.

[0013] Preferably, the second reinforcing plate is provided with a first connecting groove, and the second fixing plate is provided with a second connecting groove, the first connecting groove and the second connecting groove are configured as rectangular hole grooves with the same size, the first connecting groove and the second connecting groove are configured one by one, and the locking block is provided with a locking section formed as an L-shaped block piece, and the two locking blocks are simultaneously inserted into the corresponding first connecting groove and the second connecting groove, and the locking sections of the two locking blocks are respectively clamped and fixed to the second reinforcing plate and the second fixing plate.

[0014] Preferably, the second reinforcing plate and the second fixing plate are both provided with a first connecting hole, the locking section is provided with a second connecting hole, the second connecting hole is a through hole, the first connecting hole is a threaded hole, and the locking screw passes through the second connecting hole and is threadedly connected to the first connecting hole.

[0015] Compared with the prior art, the beneficial effect of the utility model is that the utility model can quickly implement overall reinforcement welding repair for fatigue cracks occurring at the cylinder and flange root of a large ball mill, thereby reducing the maintenance of the cylinder of a large ball mill by replacement. It is not only safe and easy to operate, but also has stable welding quality and low investment cost, meets the actual needs of the site, has high work efficiency, and greatly reduces maintenance costs, reduces downtime losses, provides a guarantee for reasonable production organization, and also provides a scientific reference basis for online repair of other large workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural front view of an online welding repair structure for reinforcing the flange of the large ball mill cylinder;

[0017] Figure 2 A three-dimensional structural view of an online welding repair structure for reinforcing the flange of the large ball mill cylinder;

[0018] Figure 3 A partial structural front view of an online welding repair structure for reinforcing the flange of the large ball mill cylinder;

[0019] Figure 4 A three-dimensional view of the partial structure of the online welding repair structure for reinforcing the flange of the large ball mill cylinder.

[0020] The numbers in the figure represent:

[0021] 1-Large ball mill cylinder; 2-Flange reinforcement; 3-Manhole reinforcement; 4-Orifice plate reinforcement; 11-Manhole plate; 12-First connecting flange; 13-Second connecting flange; 14-Third connecting flange; 15-Fourth connecting flange; 21-Reinforcement rib plate; 22-First reinforcement flange; 23-Second reinforcement flange; 24-Third reinforcement flange; 25-Fourth reinforcement flange; 31-Reinforcement connection block; 32-First fixing plate; 33-Second fixing plate; 41-Locking block; 42-First reinforcement plate; 43-Second reinforcement plate; 44-Third reinforcement plate. DETAILED DESCRIPTION

[0022] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0023] Embodiment 1

[0024] like Figure 1 , Figure 2 As shown, Figure 1 A structural front view of an online welding repair structure for reinforcing the flange of the large ball mill cylinder; Figure 2 A three-dimensional structural view of the online welding repair structure for reinforcing the large ball mill cylinder flange.

[0025] The online welding repair structure for reinforcing the flange of a large ball mill cylinder of the utility model is used to reinforce the cylinder 1 of a large ball mill. The cylinder 1 of the large ball mill is provided with a connecting flange group and a manhole. The online welding repair structure for reinforcing the flange of a large ball mill cylinder comprises a flange reinforcement part 2 and a manhole reinforcement part 3. The flange reinforcement part 2 is arranged corresponding to the connecting flange group to reinforce the connecting flange group, and the manhole reinforcement part 3 is arranged corresponding to the manhole to reinforce the manhole.

[0026] The connecting flange group includes a plurality of connecting flanges, the flange reinforcement part 2 includes a plurality of reinforcement flanges, the connecting flanges and the reinforcement flanges are arranged in a one-to-one correspondence, and the connecting flanges, the reinforcement flanges and the large ball mill cylinder 1 are arranged coaxially, the reinforcement flange is arranged as a circular ring structure, the inner ring of the reinforcement flange is fixedly connected to the outer wall of the large ball mill cylinder 1, and a plurality of reinforcing ribs 21 are arranged between the corresponding connecting flanges and the reinforcement flanges, the two ends of the reinforcing ribs 21 are respectively fixedly connected to the corresponding connecting flanges and the reinforcement flanges, and the bottom of the reinforcing ribs 21 is fixedly connected to the outer wall of the large ball mill cylinder 1, thereby achieving a fixing effect on the connecting flange.

[0027] Preferably, the reinforcing rib plates 21 are evenly distributed in a ring shape between the corresponding connecting flanges and the reinforcing flanges with the axis of the large ball mill cylinder 1 as the center, and the extension direction of the reinforcing rib plates 21 is consistent with the axis of the large ball mill cylinder 1 to ensure that the flange reinforcement part 2 uniformly fixes the various parts of the connecting flange group.

[0028] like Figure 3 , Figure 4 As shown, Figure 3 A partial structural front view of an online welding repair structure for reinforcing the flange of the large ball mill cylinder; Figure 4 The local structure stereoscopic view of the online welding repair structure for the flange reinforcement of the large ball mill cylinder. The manhole is arranged between two adjacent connecting flanges, and the manhole is arranged between two adjacent reinforcing flanges. The manhole reinforcement part 3 includes a reinforcement frame and a reinforcement connection block 31. The reinforcement frame is arranged as a rectangular frame, and the reinforcement frame is fixedly arranged on the outer wall of the large ball mill cylinder 1. The manhole is arranged in the reinforcement frame. The two ends of the reinforcement connection block 31 are respectively fixedly connected to the reinforcement frame and the reinforcement flange, and the reinforcement connection block 31 is fixedly connected to the outer wall of the large ball mill cylinder 1. The strength of the large ball mill cylinder 1 around the manhole can be reinforced by the manhole reinforcement part 3, and the probability of cracks around the manhole can be reduced.

[0029] The reinforcement frame includes two first fixing plates 32 and two second fixing plates 33. The extension direction of the first fixing plates 32 is consistent with the axis of the large ball mill cylinder 1. The second fixing plates 33 are vertically connected to the first fixing plates 32 to form a rectangular frame structure. The second fixing plates 33 are connected to the reinforcement flange through the reinforcement connecting block 31 to strengthen the overall structural strength of the reinforcement frame and the reinforcement flange.

[0030] Generally, a plurality of the reinforcement connection blocks 31 are provided on the same second fixing plate 33 and are fixedly connected to the same reinforcement flange to ensure a fixed connection effect between the reinforcement frame and the reinforcement flange.

[0031] The lower end surface of the second fixing plate 33 is configured to be arc-shaped to ensure that the second fixing plate 33 and the large ball mill cylinder 1 are closely fitted, thereby facilitating welding and fixing between the second fixing plate 33 and the large ball mill cylinder 1 .

[0032] Preferably, a manhole plate 11 is also provided on the manhole to ensure that the large ball mill cylinder 1 is sealed at the manhole position when the manhole is not in use, and the online welding repair structure of the large ball mill cylinder flange reinforcement is provided with a manhole plate reinforcement part 4 corresponding to the manhole plate 11 to reinforce the structural strength of the manhole plate 11 position.

[0033] The orifice plate reinforcement part 4 includes an orifice plate reinforcement frame and a locking block 41 . The orifice plate reinforcement frame is fixedly arranged on the manhole plate 11 , and the orifice plate reinforcement frame is fixedly connected to the reinforcement frame through the locking block 41 .

[0034] Specifically, the orifice plate reinforcement frame includes two first reinforcement plates 42, two second reinforcement plates 43 and a third reinforcement plate 44, the extension direction of the first reinforcement plate 42 is consistent with the axis of the large ball mill cylinder 1, the third reinforcement plate 44 is arranged between the two first reinforcement plates 42, and the two ends of the third reinforcement plate 44 are respectively vertically fixed on the two first reinforcement plates 42, the two ends of the first reinforcement plate 42 are respectively vertically fixed on the two second reinforcement plates 43, and the first reinforcement plate 42, the second reinforcement plate 43 and the third reinforcement plate 44 are all fixedly arranged on the manhole plate 11 to form the orifice plate reinforcement frame.

[0035] A first connecting groove is provided on the second reinforcing plate 43, and a second connecting groove is provided on the second fixing plate 33. The first connecting groove and the second connecting groove are set as rectangular hole grooves with the same size. The first connecting groove and the second connecting groove are set in one-to-one correspondence. A locking section is provided on the locking block 41 to form an L-shaped block. Two locking blocks 41 are inserted into the corresponding first connecting groove and second connecting groove at the same time. The locking sections of the two locking blocks 41 are respectively clamped and fixed with the second reinforcing plate 43 and the second fixing plate 33, so that the fixed connection between the orifice plate reinforcement frame and the reinforcement frame can be realized.

[0036] Preferably, the second reinforcing plate 43 and the second fixing plate 33 are both provided with a first connecting hole, the locking section is provided with a second connecting hole, the second connecting hole is a through hole, the first connecting hole is a threaded hole, the locking screw passes through the second connecting hole and is threadedly connected to the first connecting hole, thereby achieving a fixed connection between the locking block 41 and the second reinforcing plate 43 or the second fixing plate 33, thereby further strengthening the connection state between the orifice plate reinforcement frame and the reinforcement frame to improve the structural strength of the large ball mill cylinder 1.

[0037] Generally, the reinforcement flange is cut and processed from a 50 mm steel plate, the reinforcing rib plate 21 is cut and processed from a 30 mm steel plate, and the reinforcement frame and the reinforcement connection block 31 are cut and processed from a 25 mm steel plate.

[0038] Preferably, the flange reinforcement part 2, the manhole reinforcement part 3, the orifice plate reinforcement part 4 and the large ball mill cylinder 1 are all fixed by welding.

[0039] The utility model can quickly implement overall reinforcement welding repair for fatigue cracks occurring at the root of the large ball mill cylinder 1 and the flange, thereby reducing the maintenance of the large ball mill cylinder 1 by replacement. It is not only safe and easy to operate, but also has stable welding quality and low investment cost, meets the actual needs of the site, has high work efficiency, greatly reduces maintenance costs, reduces downtime losses, provides a guarantee for reasonable production organization, and also provides a scientific reference basis for online repair of other large workpieces.

[0040] Embodiment 2

[0041] In this embodiment, the connecting flange group generally includes a first connecting flange 12, a second connecting flange 13, a third connecting flange 14 and a fourth connecting flange 15. The large ball mill cylinder 1 includes a first cylinder and a second cylinder. For large cylinders, flange connection is generally used to connect multiple cylinders to form a corresponding large-size cylinder. Therefore, the first connecting flange 12 and the second connecting flange 13 are respectively arranged at both ends of the first cylinder, the third connecting flange 14 and the fourth connecting flange 15 are respectively arranged at both ends of the second cylinder, and the first cylinder and the second cylinder are connected through the second connecting flange 13 and the third connecting flange 14. The flange reinforcement part 2 includes a first reinforcement flange 22, a second reinforcement flange 23, and a second reinforcement flange 24. Flange 23, third reinforcement flange 24 and fourth reinforcement flange 25, the first reinforcement flange 22 and the first connection flange 12 are correspondingly arranged, the second reinforcement flange 23 and the second connection flange 13 are correspondingly arranged, the third reinforcement flange 24 and the third connection flange 14 are correspondingly arranged, the fourth reinforcement flange 25 and the fourth connection flange 15 are correspondingly arranged, the first reinforcement flange 22 and the second reinforcement flange 23 are arranged between the first connection flange 12 and the second connection flange 13, the third reinforcement flange 24 and the fourth reinforcement flange 25 are arranged between the third connection flange 14 and the fourth connection flange 15, to ensure that the manhole reinforcement part 3 can be connected and fixed to the two connection flanges at the same time.

[0042] The manhole is generally arranged on the first cylinder or the second cylinder. In the present embodiment, the manhole is arranged on the first cylinder, and the reinforcement frame is fixedly connected to the first reinforcement flange 22 and the second reinforcement flange 23 respectively through the reinforcement connecting blocks 31, and the second fixing plate 33 on the reinforcement frame is fixedly connected to the first reinforcement flange 22 and the second reinforcement flange 23 respectively through three reinforcement connecting blocks 31; and two second connecting grooves are symmetrically arranged on the same second fixing plate 33 to ensure the stable connection between the second fixing plate 33 and the second reinforcing plate 43.

[0043] The above is only a preferred embodiment of the utility model, which is only illustrative and not restrictive of the utility model. Those skilled in the art understand that many changes, modifications, and even equivalences can be made to the spirit and scope defined by the claims of the utility model, but they will all fall within the scope of protection of the utility model.

Claims

1. An online welding repair structure for reinforcing the flange of a large ball mill cylinder, characterized in that: Used to reinforce the cylinder of a large ball mill, the cylinder of the large ball mill is provided with a connecting flange group and a manhole, the manhole is provided with a manhole plate for sealing the manhole, the online welding repair structure of the large ball mill cylinder flange reinforcement includes a flange reinforcement part, a manhole reinforcement part and an orifice plate reinforcement part, the flange reinforcement part is arranged corresponding to the connecting flange group to reinforce the connecting flange group, the manhole reinforcement part is arranged corresponding to the manhole to reinforce the manhole, and the orifice plate reinforcement part is arranged corresponding to the manhole plate to reinforce the connection state between the manhole plate and the cylinder of the large ball mill.

2. The online welding repair structure for reinforcing the flange of a large ball mill cylinder as claimed in claim 1 is characterized in that: The connecting flange group includes a plurality of connecting flanges, the flange reinforcement part includes a plurality of reinforcement flanges, the connecting flanges and the reinforcement flanges are arranged in one-to-one correspondence, and the connecting flanges, the reinforcement flanges and the large ball mill cylinder are arranged coaxially, the reinforcement flange is arranged as a circular ring structure, the inner ring of the reinforcement flange is fixedly connected to the outer wall of the large ball mill cylinder, and a plurality of reinforcing ribs are arranged between the corresponding connecting flanges and the reinforcement flanges, the two ends of the reinforcing ribs are respectively fixedly connected to the corresponding connecting flanges and the reinforcement flanges, and the bottom of the reinforcing ribs is fixedly connected to the outer wall of the large ball mill cylinder.

3. The online welding repair structure for reinforcing the flange of a large ball mill cylinder as claimed in claim 2 is characterized in that: The reinforcing rib plates are evenly distributed in a ring shape between the corresponding connecting flanges and the reinforcing flanges with the axis of the large ball mill cylinder as the center.

4. The online welding repair structure for reinforcing the flange of a large ball mill cylinder as claimed in claim 2 is characterized in that: The manhole is arranged between two adjacent connecting flanges, and the manhole is arranged between two adjacent reinforcing flanges. The manhole reinforcement part includes a reinforcing frame and a reinforcing connecting block. The reinforcing frame is arranged as a rectangular frame, and the reinforcing frame is fixedly arranged on the outer wall of the large ball mill cylinder. The manhole is arranged in the reinforcing frame, and the two ends of the reinforcing connecting block are respectively fixedly connected to the reinforcing frame and the reinforcing flange, and the reinforcing connecting block is fixedly connected to the outer wall of the large ball mill cylinder.

5. The online welding repair structure for reinforcing the flange of a large ball mill cylinder as claimed in claim 4 is characterized in that: The reinforcement frame includes two first fixing plates and two second fixing plates, the extension direction of the first fixing plates is consistent with the axis of the large ball mill cylinder, the second fixing plates are vertically connected to the first fixing plates to form a rectangular frame structure, and the second fixing plates are connected to the reinforcement flange through the reinforcement connecting block.

6. The online welding repair structure for reinforcing the flange of a large ball mill cylinder as claimed in claim 5 is characterized in that: A plurality of the reinforcement connection blocks are arranged on the same second fixing plate and are fixedly connected to the same reinforcement flange.

7. The online welding repair structure for reinforcing the flange of a large ball mill cylinder as claimed in claim 5, characterized in that: The orifice plate reinforcement part comprises an orifice plate reinforcement frame and a locking block. The orifice plate reinforcement frame is fixedly arranged on the manhole plate, and the orifice plate reinforcement frame is fixedly connected to the reinforcement frame through the locking block.

8. The online welding repair structure for reinforcing the flange of a large ball mill cylinder as claimed in claim 7 is characterized in that: The orifice plate reinforcement frame includes two first reinforcement plates, two second reinforcement plates and a third reinforcement plate, the extension direction of the first reinforcement plate is consistent with the axis of the large ball mill cylinder, the third reinforcement plate is arranged between the two first reinforcement plates, and the two ends of the third reinforcement plate are respectively vertically fixed on the two first reinforcement plates, the two ends of the first reinforcement plate are respectively vertically fixed on the two second reinforcement plates, and the first reinforcement plate, the second reinforcement plate and the third reinforcement plate are all fixedly arranged on the manhole plate to form the orifice plate reinforcement frame.

9. The online welding repair structure for reinforcing the flange of a large ball mill cylinder as claimed in claim 8, characterized in that: The second reinforcing plate is provided with a first connecting groove, and the second fixing plate is provided with a second connecting groove. The first connecting groove and the second connecting groove are configured as rectangular hole grooves with the same size. The first connecting groove and the second connecting groove are configured in a one-to-one correspondence. The locking block is provided with a locking section formed as an L-shaped block. The two locking blocks are inserted into the corresponding first connecting groove and the second connecting groove at the same time, and the locking sections of the two locking blocks are respectively clamped and fixed to the second reinforcing plate and the second fixing plate.

10. The online welding repair structure for reinforcing the flange of a large ball mill cylinder as claimed in claim 9, characterized in that: The second reinforcing plate and the second fixing plate are both provided with a first connecting hole, the locking section is provided with a second connecting hole, the second connecting hole is a through hole, the first connecting hole is a threaded hole, and the locking screw passes through the second connecting hole and is threadedly connected to the first connecting hole.

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