Device for preventing coal mill roller from running off

Abstract

The utility model relates to the technical field of grinding roller, specifically relates to a device for preventing the running of the sleeve of the grinding roller of the coal mill, which comprises a roller sleeve, a roller core arranged in the roller sleeve and a plurality of T-shaped steel plates fixed on the roller core, the T-shaped steel plates are arranged in an annular array on the upper surface of the roller core, the tail part of the T-shaped steel plate is limited between a pair of limiting blocks, the limiting blocks are fixed on the inner side of the roller sleeve, and the head part of the T-shaped steel plate is fixed on the roller core by bolts on both sides. In actual application, the test shows that the grinding roller does not run off the sleeve during a year of use, the bolt position of the device is the position of the high-strength bolt on the original roller core, the tension is uniform and controllable, no additional hole needs to be opened, the device does not cause damage to the equipment and does not affect the subsequent disassembly and repair of the grinding roller.

Description

Technical Field

[0001] This utility model relates to the field of grinding roller technology, specifically to a device for preventing the grinding roller sleeve of a coal mill from running off. Background Technology

[0002] After long-term operation, the roller core and roller sleeve of the hydraulically loaded grinding roller of the medium-speed coal mill will experience relative movement, making the grinding roller assembly unusable. The traditional method is to replace the grinding roller assembly with a new one. However, since the coal mill is an important auxiliary machine, replacing the grinding roller will affect the unit's load capacity. During high-load periods, it is impossible to stop the mill for maintenance in time, which will eventually lead to the separation of the roller sleeve and roller core, increasing the difficulty of maintenance and the construction period. Utility Model Content

[0003] The purpose of this utility model is to provide a device for preventing the grinding roller sleeve of a coal mill from running off.

[0004] This utility model provides the following technical solution:

[0005] This utility model proposes a device for preventing the rolling sleeve of a coal mill roller from running off, including a roller sleeve, a roller core disposed inside the roller sleeve, and a plurality of T-shaped steel plates fixed on the roller core; the T-shaped steel plates are arranged in a ring array on the upper surface of the roller core, and the tail of the T-shaped steel plates is limited between a pair of limiting blocks, the limiting blocks being fixed to the inner edge of the roller sleeve; the head sides of the T-shaped steel plates are fixed to the roller core by bolts.

[0006] Furthermore, the T-shaped steel plate is welded to the upper part of the bolt via a connector.

[0007] Furthermore, the bolt is an M36*60, grade 8.8 high-strength bolt.

[0008] Furthermore, the limiting block is fully welded to the inner edge of the roller sleeve.

[0009] Furthermore, the limiting block has a length of 110mm and a thickness of 20mm.

[0010] Furthermore, the head of the T-shaped steel plate is 435mm long and 140mm wide; the tail of the T-shaped steel plate is 160mm long; and the overall width of the T-shaped steel plate is 185mm.

[0011] Furthermore, there are three T-shaped steel plates, and the included angle between adjacent T-shaped steel plates and the center of the roller core is 120°.

[0012] Furthermore, a back frame is provided on the roller core, and the overall thickness of the T-shaped steel plate does not exceed 40mm.

[0013] Furthermore, the T-shaped steel plate is welded together from two 20mm thick No. 20 steel plates.

[0014] Compared with the existing technology, in practical applications, this utility model has been tested and found that the grinding roller did not run off during a year of use. Moreover, the bolt position of this device is the same as the high-strength bolt position on the original roller core, and the tension is uniform and controllable. No additional holes are required, so it will not cause equipment damage and will not affect the subsequent disassembly and maintenance of the grinding roller. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram showing the positions of the T-shaped steel plate and the limiting block on the grinding roller.

[0017] In the diagram, 1-roller sleeve; 2-roller core; 3-T-shaped steel plate; 4-limiting block; 5-bolt; 6-connector; 7-back frame. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-2 The present invention will be further described below.

[0019] A device for preventing the grinding roller of a coal mill from slipping includes a roller sleeve 1, a roller core 2 disposed inside the roller sleeve 1, and a plurality of T-shaped steel plates 3 fixed on the roller core 2; the T-shaped steel plates 3 are arranged in a ring array on the upper surface of the roller core 2, and the tail of the T-shaped steel plates 3 is limited between a pair of limiting blocks 4, the limiting blocks 4 being fixed to the inner edge of the roller sleeve 1; the head sides of the T-shaped steel plates 3 are fixed to the roller core 2 by bolts 5; after on-site testing, the grinding roller did not slip during a year of use of the coal mill.

[0020] In one embodiment of this utility model, the T-shaped steel plate 3 and the upper part of the bolt 5 are welded together by a connector 6 to ensure that the bolt 5 will not easily loosen.

[0021] In one embodiment of this utility model, the connecting member 6 is an inverted L-shaped steel plate.

[0022] In one embodiment of this utility model, the bolt 5 is an M36*60, 8.8 grade high-strength bolt; it is a common bolt on the market, widely available and inexpensive.

[0023] In one embodiment of this utility model, the bolt 5 is installed at the position of the high-strength bolt on the original roller core. The tension is uniform and controllable, no additional holes are required, and it will not cause equipment damage or affect the subsequent disassembly and maintenance of the grinding roller.

[0024] In one embodiment of this utility model, the limiting block 4 is fully welded to the inner edge of the roller sleeve 1 to ensure that the relative position of the limiting block and the roller sleeve 1 will not shift.

[0025] In one embodiment of this utility model, the length f of the limiting block 4 is 110mm and the width e is 20mm; this ensures that the tail of the T-shaped steel plate is restrained, preventing relative movement between the roller core 2 and the roller sleeve 1.

[0026] In one embodiment of this utility model, the head length a of the T-shaped steel plate 3 is 435mm and the width b is 140mm; the tail length j of the T-shaped steel plate 3 is 160mm; and the overall width d of the T-shaped steel plate 3 is 185mm; ensuring that the T-shaped steel plate can prevent relative movement between the roller core 2 and the roller sleeve 1.

[0027] In one embodiment of this utility model, there are three T-shaped steel plates 3, and the included angle α between adjacent T-shaped steel plates 3 and the center of the roller core 2 is 120°; this ensures stability while saving materials to the greatest extent.

[0028] In one embodiment of this utility model, a back frame 7 is provided on the roller core 2, the overall thickness of the T-shaped steel plate 3 does not exceed 40mm, and the thickness of the limiting block 4 does not exceed 20mm. Because the gap between the roller core 2 and the back frame 7 is small, the thickness (height) of the T-shaped steel plate and the limiting block is controlled to avoid contact with the back frame 7.

[0029] In one embodiment of this utility model, the T-shaped steel plate 3 is welded from two 20# steel plates, each 20mm thick. It has a simple structure, can be made using leftover materials from maintenance, and is inexpensive and reliable. The limiting block 4 has a thickness of 20mm.

[0030] In one embodiment of this utility model, the coal mill is a ZGM123-N type coal mill.

[0031] In practical applications, the tails of the three T-shaped steel plates are limited between the limiting blocks welded to the inner edge of the roller sleeve, and the heads are fixed to the roller core with bolts. The upper part of the bolts is welded to the T-shaped steel plates with inverted L-shaped steel plates, which effectively prevents relative movement between the roller sleeve and the roller core.

[0032] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model.

Claims

1. A device for preventing the mill roller sleeve from slipping, characterized in that: It includes a roller sleeve, a roller core disposed inside the roller sleeve, and a plurality of T-shaped steel plates fixed on the roller core; the T-shaped steel plates are arranged in a ring array on the upper surface of the roller core, the tail of the T-shaped steel plates is limited between a pair of limiting blocks, the limiting blocks are fixed to the inner edge of the roller sleeve; the head of the T-shaped steel plates is fixed to the roller core on both sides by bolts.

2. The device for preventing the mill roller sleeve from slipping as described in claim 1, characterized in that: The T-shaped steel plate is welded to the upper part of the bolt via a connector.

3. The device for preventing the mill roller sleeve from running off according to claim 1, characterized in that: The bolts are M36*60, grade 8.8 high-strength bolts.

4. The device for preventing the mill roller sleeve from running off according to claim 1, characterized in that: The limiting block is fully welded to the inner edge of the roller sleeve.

5. The device for preventing the mill roller sleeve from slipping as described in claim 1, characterized in that: The limiting block has a length of 110mm and a thickness of 20mm.

6. The device for preventing the mill roller sleeve from running off according to claim 1, characterized in that: The head of the T-shaped steel plate is 435mm long and 140mm wide; the tail of the T-shaped steel plate is 160mm long; and the overall width of the T-shaped steel plate is 185mm.

7. The device for preventing the mill roller sleeve from running off according to claim 1, characterized in that: There are three T-shaped steel plates, and the included angle between adjacent T-shaped steel plates and the center of the roller core is 120°.

8. The device for preventing the mill roller sleeve from running off according to claim 1, characterized in that: The roller core is provided with a back frame, and the overall thickness of the T-shaped steel plate does not exceed 40mm.

9. The device for preventing the mill roller sleeve from running off according to claim 1, characterized in that: The T-shaped steel plate is welded from two 20mm thick No. 20 steel plates.

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