Closed rotary kiln

Abstract

The utility model discloses a closed rotary kiln which comprises a main body frame, the top face of the main body frame is rotationally connected with a rotating cylinder, the top face of the main body frame is fixedly connected with a fixed cylinder, the inner wall of the fixed cylinder is provided with a connecting groove, and the surface of the rotating cylinder is rotationally connected with the inner wall of the connecting groove. The rotating cylinder and the fixed cylinder are used in cooperation with each other through a rotating plate, a sliding groove, graphite blocks, a sliding strip, a rotating column, a movable block, a movable groove and the like, so that the circle center formed by the multiple graphite blocks can be controlled to become larger or smaller by rotating the rotating plate; the springs stretch along with abrasion of the graphite blocks to push the rotating plates to rotate, when the rotating plates rotate, the circle center formed by the multiple rotating plates can be decreased, and therefore the rotating plates are continuously attached to the surface of the rotating cylinder, the good sealing effect is continuously kept, the maintenance frequency is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kilns, in particular to a closed rotary kiln. Background Art

[0002] A closed rotary kiln is an industrial equipment used for high-temperature treatment of various materials. It is widely used in metallurgy, chemical industry, building materials and other industries for calcining ores, producing cement, treating hazardous waste and other processes.

[0003] In the prior art, traditional closed rotary kilns widely use the method of installing graphite blocks to achieve a sealing effect with the rotary kiln cylinder. Although the graphite blocks are self-lubricating, they are easily worn during the long-term contact and friction with the rotary kiln cylinder. The worn graphite blocks are difficult to automatically adhere to the rotary kiln cylinder, which easily leads to the leakage of gas, dust, etc. in the rotary kiln. Gas leakage not only seriously affects the cleanliness of the production environment, but also poses a potential threat to the health of operators. Dust leakage will accumulate in the surrounding environment, increasing the difficulty and cost of cleaning work. Secondly, the independently installed graphite blocks are extremely cumbersome to replace. Since the graphite blocks are independently installed on the rotary kiln, when they need to be replaced, the machine must be shut down first, which will undoubtedly interrupt the production process and cause considerable time and economic losses to the enterprise. Therefore, a closed rotary kiln is urgently needed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a closed rotary kiln to solve the problem in the above background technology that the worn graphite blocks are difficult to automatically adhere to the rotary kiln cylinder.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a closed rotary kiln, comprising a main frame, a rotating cylinder rotatably connected to the top surface of the main frame, a fixed cylinder fixedly connected to the top surface of the main frame, a connecting groove formed on the inner wall of the fixed cylinder, a surface of the rotating cylinder rotatably connected to the inner wall of the connecting groove, a sealing sleeve being sleeved on the surfaces of the rotating cylinder and the fixed cylinder, a fixing ring being fixedly connected to the surface of the sealing sleeve, and a sealing mechanism for continuous clamping being provided on the top surface of the main frame;

[0006] The cam is fixedly mounted on a top surface of the main frame, and the side wall of the support plate is fixedly connected to a fixed plate, the inner wall of the fixed plate is movably sleeved on the surface of the rotating cylinder, the side wall of the fixed plate is provided with a plurality of movable grooves, the inner wall of the movable groove is slidably connected to a sliding bar, the side wall of the sliding bar is fixedly connected to a moving block, the side wall of the moving block is fixedly connected to a graphite block, the side wall of the moving block is provided with a rotating hole, the inner wall of the rotating hole is rotatably connected to a rotating column, the side wall of the fixed plate is provided with a rotating plate, the side wall of the rotating plate is provided with a plurality of sliding grooves, the surface of the rotating column is slidably connected to the inner wall of the sliding groove, the side wall of the main frame is fixedly connected to a limiting plate, and the side wall of the limiting plate abuts against the left end of the rotating plate.

[0007] Preferably, the top surface of the main frame is fixedly connected to a limit block, the inner wall of the limit block is slidably connected to a rack, the side wall of the rack is fixedly connected to a connecting block, the side wall of the connecting block is fixedly connected to a connecting column, the surface of the connecting column is sleeved with a spring, the surface of the connecting column is sleeved with a sliding plate, the top surface of the main frame is fixedly connected to an L-shaped plate, the side wall of the L-shaped plate is fixedly connected to an electric telescopic cylinder, the telescopic end of the electric telescopic cylinder passes through the side wall of the L-shaped plate and extends to the outside, and the side wall of the sliding plate is fixedly connected to the telescopic end of the electric telescopic cylinder.

[0008] Preferably, the top surface of the main frame is fixedly connected to a limit box, an inner wall of the limit box is provided with a limit groove, and the inner wall of the limit groove is slidably connected to the side wall of the sliding plate.

[0009] Preferably, a plurality of teeth are provided on the surface of the rotating plate, and the rack is meshedly connected with the surface of the rotating plate.

[0010] Preferably, a graphite ring is provided on the inner wall of the connecting groove, the left end of the graphite ring is in contact with the right end of the rotating cylinder, and the right end of the graphite ring is in contact with the inner wall of the fixed cylinder.

[0011] Preferably, the left end of the spring is fixedly connected to the side wall of the connecting block, and the right end of the spring is fixedly connected to the side wall of the sliding plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] By cooperating with each other, the rotating plate, sliding groove, graphite block, sliding bar, rotating column, movable block and movable groove, etc. are arranged so that the center of the circle composed of multiple graphite blocks can be controlled to become larger or smaller by rotating the rotating plate. When the graphite block acts on the surface of the rotating cylinder for a long time and causes the graphite block to wear, the spring stretches as the graphite block wears and pushes the rotating plate to rotate. When the rotating plate rotates, the center of the circle composed of the multiple rotating plates can be made smaller, so that the rotating plate and the surface of the rotating cylinder are continuously in contact, thereby continuously maintaining a good sealing effect, reducing the number of maintenance times and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the graphite ring structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the rotating plate structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the fixed plate structure of the present utility model;

[0018] Figure 5 for Figure 2 Enlarged structural diagram at point A in the middle.

[0019] In the figure: 1. Main frame; 2. Rotating cylinder; 3. Fixed cylinder; 4. Support plate; 5. Electric telescopic cylinder; 6. Connecting groove; 7. Graphite ring; 8. Sealing sleeve; 9. Fixed ring; 10. Fixed plate; 11. Movable groove; 12. Sliding bar; 13. Graphite block; 14. Rotating hole; 15. Rotating column; 16. Rotating plate; 17. Sliding groove; 18. Limit plate; 19. Rack; 20. Limit block; 21. Connecting block; 22. Connecting column; 23. Spring; 24. Limit box; 25. Limit groove; 26. Sliding plate; 27. L-shaped plate; 28. Moving block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-5The utility model provides a closed rotary kiln, including a main frame 1, the top surface of the main frame 1 is rotatably connected to a rotating cylinder 2, the top surface of the main frame 1 is fixedly connected to a fixed cylinder 3, the inner wall of the fixed cylinder 3 is provided with a connecting groove 6, the surface of the rotating cylinder 2 is rotatably connected to the inner wall of the connecting groove 6, the surface of the rotating cylinder 2 and the surface of the fixed cylinder 3 are provided with a same sealing sleeve 8, the surface of the sealing sleeve 8 is fixedly connected to a fixing ring 9, the top surface of the main frame 1 is provided with a sealing mechanism for continuous clamping, the sealing mechanism includes a support plate 4, the support plate 4 is fixedly connected to the top surface of the main frame 1, the side wall of the support plate 4 is fixedly connected to a fixing plate 10, the inner wall of the fixing plate 10 is connected to the rotating cylinder 2 The surface of the fixed plate 10 is movably socketed, the side wall of the fixed plate 10 is provided with a plurality of movable grooves 11, the inner wall of the movable groove 11 is slidably connected with a sliding bar 12, the side wall of the sliding bar 12 is fixedly connected with a moving block 28, the side wall of the moving block 28 is fixedly connected with a graphite block 13, the side wall of the moving block 28 is provided with a rotating hole 14, the inner wall of the rotating hole 14 is rotatably connected with a rotating column 15, the side wall of the fixed plate 10 is provided with a rotating plate 16, the side wall of the rotating plate 16 is provided with a plurality of sliding grooves 17, the surface of the rotating column 15 is slidably connected to the inner wall of the sliding groove 17, the side wall of the main frame 1 is fixedly connected with a limiting plate 18, and the side wall of the limiting plate 18 is against the left end of the rotating plate 16.

[0022] Furthermore, the top surface of the main frame 1 is fixedly connected to the limit block 20, the inner wall of the limit block 20 is slidably connected to the rack 19, the side wall of the rack 19 is fixedly connected to the connecting block 21, the side wall of the connecting block 21 is fixedly connected to the connecting column 22, the surface of the connecting column 22 is sleeved with a spring 23, the surface of the connecting column 22 is sleeved with a sliding plate 26, the top surface of the main frame 1 is fixedly connected to the L-shaped plate 27, the side wall of the L-shaped plate 27 is fixedly connected to the electric telescopic cylinder 5, the telescopic end of the electric telescopic cylinder 5 passes through the side wall of the L-shaped plate 27 and extends to the outside, the side wall of the sliding plate 26 is fixedly connected to the telescopic end of the electric telescopic cylinder 5, and the rack 19, connecting column 22 and sliding plate 26 are used in conjunction with each other, so that the spring 23 can be stretched to allow the worn graphite block 13 to continue to stick to the surface of the rotating cylinder 2.

[0023] Furthermore, the top surface of the main frame 1 is fixedly connected to a limit box 24, and a limit groove 25 is provided on the inner wall of the limit box 24. The inner wall of the limit groove 25 is slidably connected to the side wall of the sliding plate 26. The limit box 24 is set to facilitate the sliding plate 26 to slide on the inner wall of the limit groove 25.

[0024] Furthermore, a plurality of teeth are provided on the surface of the rotating plate 16 , and the rack 19 is meshedly connected with the surface of the rotating plate 16 . By providing the rack 19 , the movement of the rack 19 can drive the rotating plate 16 to rotate.

[0025] Furthermore, a graphite ring 7 is provided on the inner wall of the connecting groove 6. The left end of the graphite ring 7 is in contact with the right end of the rotating cylinder 2, and the right end of the graphite ring 7 is in contact with the inner wall of the fixed cylinder 3. The provision of the graphite ring 7 improves the sealing performance of the connection between the fixed cylinder 3 and the rotating cylinder 2.

[0026] Furthermore, the left end of the spring 23 is fixedly connected to the side wall of the connecting block 21, and the right side of the spring 23 is fixedly connected to the side wall of the sliding plate 26. By setting the spring 23, when the telescopic shaft of the electric telescopic cylinder 5 is extended, the spring 23 continues to maintain the extension force.

[0027] Working principle: Through the sliding plate 26, the electric telescopic cylinder 5 is extended to make the spring 23 contract and release the stretching force at the same time. When the rotating plate 16 becomes smaller due to long-term wear, the spring 23 stretches to push the connecting block 21 and the rack 19 to move. The movement of the rack 19 drives the rotating plate 16 to rotate. The rotation of the rotating plate 16 drives the multiple graphite blocks 13 to move through the multiple rotating holes 14. The movable groove 11 limits the multiple graphite blocks 13 so that the center of the circle formed by the multiple graphite blocks 13 becomes larger or smaller when the rotating plate 16 moves. When the rotating plate 16 is worn, the spring 23 stretches to make the center of the circle formed by the multiple graphite blocks 13 smaller. When the telescopic shaft of the electric telescopic cylinder 5 is retracted, the rotating plate 16 rotates to make the center of the circle formed by the multiple graphite blocks 13 larger, thereby facilitating the disassembly of the rotating cylinder 2 or the replacement of the sealing sleeve 8.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A closed rotary kiln, comprising a main frame (1), characterized in that: The top surface of the main frame (1) is rotatably connected to a rotating cylinder (2), and the top surface of the main frame (1) is fixedly connected to a fixed cylinder (3). The inner wall of the fixed cylinder (3) is provided with a connecting groove (6). The surface of the rotating cylinder (2) is rotatably connected to the inner wall of the connecting groove (6). The surfaces of the rotating cylinder (2) and the fixed cylinder (3) are sleeved with the same sealing sleeve (8). The surface of the sealing sleeve (8) is fixedly connected to a fixing ring (9). The top surface of the main frame (1) is provided with a sealing mechanism for continuous clamping. The sealing mechanism comprises a support plate (4), the support plate (4) is fixedly connected to the top surface of the main frame (1), the side wall of the support plate (4) is fixedly connected to a fixed plate (10), the inner wall of the fixed plate (10) is movably connected to the surface of the rotating cylinder (2), the side wall of the fixed plate (10) is provided with a plurality of movable grooves (11), the inner wall of the movable groove (11) is slidably connected to a sliding bar (12), the side wall of the sliding bar (12) is fixedly connected to a moving block (28), and the side wall of the moving block (28) is fixedly connected to A graphite block (13) is provided on the side wall of the movable block (28), a rotating hole (14) is provided on the inner wall of the rotating hole (14), a rotating column (15) is rotatably connected to the inner wall of the rotating hole (14), a rotating plate (16) is provided on the side wall of the fixed plate (10), a plurality of sliding grooves (17) are provided on the side wall of the rotating plate (16), the surface of the rotating column (15) is slidably connected to the inner wall of the sliding groove (17), and a limiting plate (18) is fixedly connected to the side wall of the main frame (1), and the side wall of the limiting plate (18) is abutted against the left end of the rotating plate (16).

2. A closed rotary kiln according to claim 1, characterized in that: The top surface of the main frame (1) is fixedly connected to a limit block (20), the inner wall of the limit block (20) is slidably connected to a rack (19), the side wall of the rack (19) is fixedly connected to a connecting block (21), the side wall of the connecting block (21) is fixedly connected to a connecting column (22), the surface of the connecting column (22) is provided with a spring (23), the surface of the connecting column (22) is provided with a sliding plate (26), the top surface of the main frame (1) is fixedly connected to an L-shaped plate (27), the side wall of the L-shaped plate (27) is fixedly connected to an electric telescopic cylinder (5), the telescopic end of the electric telescopic cylinder (5) passes through the side wall of the L-shaped plate (27) and extends to the outside, and the side wall of the sliding plate (26) is fixedly connected to the telescopic end of the electric telescopic cylinder (5).

3. A closed rotary kiln according to claim 1, characterized in that: The top surface of the main frame (1) is fixedly connected to a limit box (24), an inner wall of the limit box (24) is provided with a limit slot (25), and the inner wall of the limit slot (25) is slidably connected to the side wall of the sliding plate (26).

4. A closed rotary kiln according to claims 1 and 2, characterized in that: The surface of the rotating plate (16) is provided with a plurality of teeth, and the rack (19) is meshedly connected with the surface of the rotating plate (16).

5. The closed rotary kiln according to claim 1, characterized in that: A graphite ring (7) is provided on the inner wall of the connecting groove (6), the left end of the graphite ring (7) is in contact with the right end of the rotating cylinder (2), and the right end of the graphite ring (7) is in contact with the inner wall of the fixed cylinder (3).

6. A closed rotary kiln according to claim 2, characterized in that: The left end of the spring (23) is fixedly connected to the side wall of the connecting block (21), and the right end of the spring (23) is fixedly connected to the side wall of the sliding plate (26).

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