A bucket type sealing device for rotary kiln tail

Abstract

The invention discloses a rotary kiln tail bucket type sealing device, which is arranged at the rotary kiln tail, and is characterized in that: an outer shell is sleeved on the outer circumferential wall of the rotary kiln cylinder tail, a return material bucket is fixed on the cylinder flange close to the smoke chamber side, and a return material sleeve is fixed on the other side thereof by bolts, a spring plate device is fixed on the inner circumferential wall of the return material sleeve, the spring plate device abuts against the rotary kiln cylinder, a plurality of return material plates are evenly distributed on the outer circumferential wall of the return material sleeve, one end of the outer shell is fixedly connected to the smoke chamber, and a plurality of first fish scales staggeredly distributed with each other are fixed on the other end of the outer shell, and the first fish scales extend obliquely toward the return material sleeve direction through the outer shell. The advantages of the invention compared with the prior art are that the rotary kiln tail bucket type sealing device has a simple overall structure, good sealing performance, long service life, and effectively reduces production costs.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kilns, in particular to a bucket-type sealing device at the tail of a rotary kiln. Background Art

[0002] The rotary kiln is the main equipment for cement production. The kiln tail seal plays a sealing role in connecting the fixed parts and the rotating parts in the firing system. The firing system is a thermal equipment in a high-temperature, high-dust, negative pressure process environment. With the rapid development of social economy and the improvement of people's living standards, the state has put forward higher standards and requirements for environmental protection and energy conservation. Since the kiln body produces comprehensive movements such as swing and axial movement during its own weight and rotation, the kiln tail seal device is required to automatically compensate for the swing during the operation of the kiln and the reciprocating movement along the axial direction during operation. Otherwise, air leakage and dust emission will occur, reducing the amount of effective gas passing through, increasing the amount of waste gas in the system, increasing the various energy consumption of the system, and leading to a reduction in the amount of secondary air entering, resulting in a reduction in output and a decline in quality, bringing unnecessary losses to the system and increasing production costs. Therefore, the kiln tail seal device is also a relatively important component in the rotary kiln equipment.

[0003] At present, the most commonly used sealing structure at the kiln tail is the end contact type. There are various specific forms, but they all have different problems, such as high manufacturing cost, short component life, and many air leakage and material leakage problems. The overall sealing performance still has a lot of room for improvement, so it is necessary to improve it. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a rotary kiln tail bucket sealing device with good sealing performance, long service life and low cost.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a rotary kiln tail bucket type sealing device, which is arranged at the tail of the rotary kiln, the rotary kiln tail includes a smoke chamber and a rotary kiln cylinder, a cylinder flange is fixed on the rotary kiln cylinder, a fixed sleeve is fixed on the smoke chamber, an outer shell is sleeved on the outer circumferential wall of the tail of the rotary kiln cylinder, a return bucket is fixed on one side of the cylinder flange close to the smoke chamber, and a return sleeve is fixed on the other side by bolts, the shoveling port of the return bucket is close to the inner wall of the outer shell, and the return sleeve is fixed on the other side of the cylinder flange by bolts. A spring plate device is fixed on the inner circumferential wall of the sleeve, and the spring plate device is in contact with the rotary kiln cylinder. A plurality of return material plates are evenly distributed on the outer circumferential wall of the return material sleeve. The return material plates are spirally distributed along the axial direction of the rotary kiln cylinder, and the spiral advancing direction is toward the return material bucket. The return material plate is located inside the outer shell, one end of the outer shell is fixedly connected to the smoke chamber, and the other end of the outer shell is fixedly provided with a plurality of first fish scales distributed alternately with each other, and the first fish scales extend obliquely toward the return material sleeve through the outer shell.

[0006] The return material bucket is composed of a first flange and a second flange, the first flange is fixedly connected to the cylinder flange by bolts, a plurality of loading plates are evenly fixed between the second flange and the first flange, a shoveling plate is fixed on the loading plate, the shoveling plate extends obliquely upward along the rotation direction of the rotary kiln cylinder through the loading plate, baffles are fixed on both sides of the shoveling plate, and the two baffles are fixedly connected to the first flange and the second flange respectively.

[0007] A plurality of second fish scales are arranged on the outer side of the first fish scales and are staggered with each other. The second fish scales extend obliquely toward the material return sleeve through the outer shell.

[0008] A Z-shaped sealing block is fixed on one end of the first fish scale and the second fish scale close to the rotary kiln cylinder. The Z-shaped sealing block abuts against the rotary kiln cylinder and is made of graphite material or polytetrafluoroethylene material.

[0009] A high temperature resistant sealing layer is provided between the first fish scale and the second fish scale, and the high temperature resistant sealing layer is made of fireproof cloth material or carbon silicon aluminum fiber material.

[0010] The outer side of the second fish scale is equipped with a plurality of weight devices, which are composed of a traction rope, a first column, a second column, a first counterweight frame and a second counterweight frame. The first column is rotatably provided with a first pulley, the second column is rotatably provided with a second pulley, and the first column and the first column are both fixed on the installation platform of the rotary kiln. One end of the traction rope is fixedly connected to the first counterweight frame, and the other end of the traction rope is fixedly connected to the second counterweight frame after passing through the first pulley, the outer side surface of the second fish scale and the second pulley in sequence. A plurality of counterweight blocks are arranged in the first counterweight frame and the second counterweight frame.

[0011] After adopting the above structure, the advantages of the present invention compared with the prior art are: a rotary kiln tail bucket type sealing device includes a return material bucket, a return material sleeve, a spring plate device, a return material plate, a first fish scale and other components. Through the cooperation of the return material bucket, the return material plate and other components, the material cleaning on the inner wall of the outer shell is guaranteed, and the material recovery effect is good, which greatly reduces the leakage problem. The return material bucket does not contact the outer shell, which improves the overall adaptability to the swing of the rotary kiln tail. The three-layer seal formed by the first fish scale, the second fish scale and other components greatly improves the sealing performance and avoids the problem of air leakage and material leakage. Through the Z-shaped sealing block and other components, the wear of the sealing components is greatly reduced and the overall service life is extended. The return material sleeve is adjusted with the concentricity of the rotary kiln cylinder through the cooperation of the spring plate device and other components, which can effectively compensate for the swing of the rotary kiln cylinder. The rotary kiln tail bucket type sealing device has a simple overall structure, avoids the problem of air leakage and material leakage, has good sealing performance, and has a long service life, which effectively reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a structural schematic diagram of a rotary kiln tail bucket type sealing device.

[0013] Figure 2 The present invention is a schematic structural diagram of a return material bucket in a rotary kiln tail bucket sealing device.

[0014] Figure 3 The present invention is a schematic structural diagram of a heavy hammer device in a rotary kiln tail bucket sealing device.

[0015] As shown in the figure: 1. smoke chamber, 2. rotary kiln cylinder, 3. cylinder flange, 4. fixed sleeve, 5. outer shell, 6. return material bucket, 7. return material sleeve, 9. spring plate device, 10. return material plate, 11. first fish scale, 12. second fish scale, 13. Z-type sealing block, 14. high temperature resistant sealing layer, 15. first flange, 16. second flange, 17. loading plate, 18. shovel plate, 19. baffle, 20. heavy hammer device, 21. traction rope, 22. first column, 23. second column, 24. first counterweight frame, 25. second counterweight frame, 26. first pulley, 27. second pulley, 28. counterweight block. DETAILED DESCRIPTION

[0016] The following description is only a preferred embodiment of the present invention, and does not limit the protection scope of the present invention. The present invention is further described below in conjunction with the drawings and embodiments.

[0017] For example, see Figures 1 to 3 As shown:

[0018] A rotary kiln tail bucket sealing device is arranged in the rotary kiln tail. The rotary kiln tail includes a smoke chamber 1 and a rotary kiln cylinder 2. A cylinder flange 3 is fixed on the rotary kiln cylinder 2. A fixed sleeve 4 is fixed on the smoke chamber 1. An outer shell 5 is sleeved on the outer circumferential wall of the tail of the rotary kiln cylinder 2. A return bucket 6 is fixed on the side of the cylinder flange 3 close to the smoke chamber 1, and a return sleeve 7 is fixed on the other side by bolts. The return bucket 6 and the return sleeve 7 are used to clean the material adhered to the inner wall of the outer shell 5 and make the material fall into the feeding port of the rotary kiln cylinder 2. The return bucket 6 does not contact the outer shell 5, thereby improving the adaptability of the return bucket 6 to the swing of the kiln tail end. The shoveling port of the return bucket 6 is close to the inner wall of the outer shell 5. Further, the The return material bucket 6 is composed of a first flange 15 and a second flange 16, wherein the first flange 15 is fixedly connected to the cylinder flange 3 by bolts, and a plurality of loading plates 17 are evenly fixed between the second flange 16 and the first flange 15, and the second flange 16 is fixedly connected to the first flange 15 through the loading plates 17, and the loading plates 17 should be perpendicular to the rotation direction of the rotary kiln cylinder 2, and a shovel plate 18 is fixed on the loading plates 17, and the shovel plate 18 extends obliquely upward along the rotation direction of the rotary kiln cylinder 2 through the loading plates 17, and baffles 19 are fixed on both sides of the shovel plate 18, and the two baffles 19 are fixedly connected to the first flange 15 and the second flange 16 respectively, and the shovel plate 18, the baffles 19 on both sides of the shovel plate 18, and the baffles 19 adjacent to the shovel plate 18 and located therein The shovel plate 18 at the front end forms a shovel opening, which is close to the inner wall of the outer shell 5. When the rotary kiln cylinder 2 rotates, the material can enter the return material bucket 6 in two ways. One is to skip the feeding tongue and directly enter the return material bucket 6. The other is to float on the inner wall of the outer shell 5 and form an accumulation. After the material on the inner wall of the outer shell 5 accumulates to a certain height, it will enter the return material bucket 6 from the shovel opening under the action of the shovel plate 18. The material entering the return material bucket 6 in the above two ways will be accumulated on the loading plate 17 due to inertia. When the loading plate 17 rotates to the highest point with the rotary kiln cylinder 2, the material on it will fall into the feeding tongue to avoid leakage and ensure the overall sealing. The return material sleeve A spring plate device 9 is fixed on the inner circumferential wall of 7, and the spring plate device 9 abuts against the rotary kiln cylinder 2. The spring plate device is composed of a spring plate and a spring. One end of the spring plate is hinged with the return sleeve 7, and the other end abuts against the rotary kiln cylinder 2. The spring is fixed between the spring plate and the return sleeve 7, so that the abutting end of the spring plate and the rotary kiln cylinder 2 is firmly attached to the rotary kiln cylinder 2. The return sleeve 7 screws the bolts connected to the cylinder flange 3. Since the spring plate device 9 has a certain elasticity, the concentricity of the return sleeve 7 and the rotary kiln cylinder 2 can be adjusted to compensate for the swing of the rotary kiln cylinder and improve the overall sealing. A plurality of return plates 10 are evenly distributed on the outer circumferential wall of the return sleeve 7, and the return plates 10 are spirally distributed along the axial direction of the rotary kiln cylinder 2.And its spiral forward direction is toward the return material bucket 6, and the return material plate 10 is located inside the outer shell 5. When the return material plate 10 rotates with the rotary kiln cylinder 2, it can push the material on the side of the return material bucket 6 close to the return material sleeve 7 to the shoveling port of the return material bucket 6 to avoid material accumulation at this place and reduce leakage problems. If there is a larger space on the other side of the return material bucket 6, the shoveling port can be expanded to this side to achieve the cleaning of the material on this side. One end of the outer shell 5 is fixedly connected to the smoke chamber 1, and the other end of the outer shell 5 is fixedly provided with a plurality of first fish scales 11 distributed alternately with each other. The first fish scales 11 extend obliquely through the outer shell 5 toward the return material sleeve 7. When the rotary kiln cylinder 2 rotates, the outer shell 5 does not move, and the return material sleeve 7 rotates with the rotary kiln cylinder 2 The first fish scale 11 can ensure the sealing between the outer shell 5 and the return sleeve 7 by rotating. Preferably, a plurality of second fish scales 12 are arranged on the outer side of the outer shell 5 and are staggered with each other. The second fish scales 12 extend obliquely toward the return sleeve 7 through the outer shell 5. The second fish scales 12 are sealed again on the basis of the sealing of the first fish scales 11, which greatly improves the sealing between the outer shell 5 and the return sleeve 7. Furthermore, a Z-shaped sealing block 13 is fixed to one end of the first fish scale 11 close to the return sleeve 7, and the Z-shaped sealing block 13 abuts against the return sleeve 7 and is made of graphite material or polytetrafluoroethylene material. In other embodiments, the first fish scale 11 and the second fish scale 1 2 is fixed with a Z-shaped sealing block 13 at one end close to the rotary kiln cylinder 2, and the Z-shaped sealing block 13 is in contact with the rotary kiln cylinder 2. The graphite material and the polytetrafluoroethylene material have strong lubrication performance, which effectively reduces the friction of the first fish scale 11 and the second fish scale 12 on the return sleeve 7, effectively prolongs the overall service life and reduces the cost. Further, a high-temperature resistant sealing layer 14 is provided between the first fish scale 11 and the second fish scale 12, and the high-temperature resistant sealing layer 14 is made of fireproof cloth material or carbon silicon aluminum fiber material. The fireproof cloth material and the carbon silicon aluminum fiber material have strong high-temperature resistance and long service life. The first fish scale 11, the high-temperature resistant sealing layer 14 and the second fish scale 12 constitute a three-layer seal, which greatly enhances the outer shell 5 To ensure the sealing between the first fish scale 11 and the second fish scale 12 and the return material sleeve 7, and avoid air leakage and material leakage, in order to ensure the fit between the first fish scale 11 and the second fish scale 12 on the return material sleeve 7, the pressure of the first fish scale 11 and the second fish scale 12 on the return material sleeve 7 can be increased by external force. Preferably, the outer side of the second fish scale 12 is equipped with a plurality of weight devices 20, and the weight device 20 is composed of a traction rope 21, a first column 22, a second column 23, a first counterweight frame 24 and a second counterweight frame 25. The first column 22 is rotatably provided with a first pulley 26, and the second column 23 is rotatably provided with a second pulley 27, and the first column 22 and the first column 22 are fixed on the installation platform of the rotary kiln, and one end of the traction rope 21 is fixedly connected to the first counterweight frame 24.The other end of the traction rope 21 is fixedly connected to the second counterweight frame 25 after passing through the first pulley 26, the outer side of the second fish scale 12 and the second pulley 27 in sequence. The other end of the traction rope 21 can also be directly fixed to the second column 23 after passing through the first pulley 26 and the second fish scale 12 in sequence. The first counterweight frame 24 and the second counterweight frame 25 are both provided with a plurality of counterweight blocks 28. The traction rope 21 passing through the second fish scale 12 is pulled down by the counterweight frame 25 at both ends to fasten the second fish scale 12 to the return sleeve 7, ensuring the fit of the second fish scale 12 on the return sleeve 7. Since the second fish scale 12 is on the outside of the first fish scale 11, it also presses the first fish scale 11 while pressing it.

[0019] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A rotary kiln tail bucket type sealing device, which is arranged at the rotary kiln tail, the rotary kiln tail comprises a smoke chamber (1) and a rotary kiln cylinder (2), a cylinder flange (3) is fixed on the rotary kiln cylinder (2), and a fixed sleeve (4) is fixed on the smoke chamber (1), characterized in that: An outer shell (5) is sleeved on the outer circumferential wall of the rear end of the rotary kiln cylinder (2); a return material bucket (6) is fixed on the cylinder flange (3) on one side close to the smoke chamber (1), and a return material sleeve (7) is fixed on the other side thereof by bolts; a shoveling port of the return material bucket (6) is close to the inner wall of the outer shell (5); a spring plate device (9) is fixed on the inner circumferential wall of the return material sleeve (7); the spring plate device (9) is in contact with the rotary kiln cylinder (2); the spring plate device (9) comprises a spring plate, one end of the spring plate is hinged to the return material sleeve (7), and the other end of the spring plate is hinged to the rotary kiln cylinder (2) abutting, a plurality of return material plates (10) are evenly distributed on the outer circumferential wall of the return material sleeve (7), the return material plates (10) are spirally distributed along the axial direction of the rotary kiln cylinder (2), and the spiral advancing direction is toward the return material bucket (6), the return material plate (10) is located inside the outer shell (5), one end of the outer shell (5) is fixedly connected to the smoke chamber (1), and the other end of the outer shell (5) is fixedly provided with a plurality of first fish scales (11) distributed in an alternating manner, and the first fish scales (11) extend obliquely through the outer shell (5) toward the return material sleeve (7).

2. A rotary kiln tail bucket sealing device according to claim 1, characterized in that: The return material shovel (6) is composed of a first flange (15) and a second flange (16); the first flange (15) is fixedly connected to the cylinder flange (3) by bolts; a plurality of material carrier plates (17) are evenly fixed between the second flange (16) and the first flange (15); a shoveling plate (18) is fixed on the material carrier plate (17); the shoveling plate (18) extends upwardly along the rotation direction of the rotary kiln cylinder (2) via the material carrier plate (17); baffle plates (19) are fixed on both sides of the shoveling plate (18); the two baffle plates (19) are fixedly connected to the first flange (15) and the second flange (16) respectively.

3. The rotary kiln tail bucket sealing device according to claim 1, characterized in that: A plurality of second fish scales (12) are arranged on the outer side of the first fish scales (11) and are staggered with each other. The second fish scales (12) extend obliquely through the outer shell (5) toward the return sleeve (7).

4. A rotary kiln tail bucket sealing device according to claim 3, characterized in that: A Z-shaped sealing block (13) is fixed to one end of the first fish scale (11) and the second fish scale (12) close to the return sleeve (7). The Z-shaped sealing block (13) abuts against the return sleeve (7) and is made of graphite material or polytetrafluoroethylene material.

5. The rotary kiln tail bucket sealing device according to claim 4, characterized in that: A high temperature resistant sealing layer (14) is provided between the first fish scale (11) and the second fish scale (12), and the high temperature resistant sealing layer (14) is made of a fireproof cloth material or a carbon silicon aluminum fiber material.

6. The rotary kiln tail bucket sealing device according to claim 3, characterized in that: The outer side of the second fish scale sheet (12) is provided with a plurality of weight devices (20), the weight devices (20) are composed of a traction rope (21), a first column (22), a second column (23), a first counterweight frame (24) and a second counterweight frame (25), the first column (22) is provided with a first pulley (26) for rotation, the second column (23) is provided with a second pulley (27) for rotation, and the first column (22) and the first column (22) are both fixed on the installation platform of the rotary kiln, one end of the traction rope (21) is fixedly connected to the first counterweight frame (24), and the other end of the traction rope (21) is fixedly connected to the second counterweight frame (25) after passing through the first pulley (26), the outer side surface of the second fish scale sheet (12) and the second pulley (27) in sequence, and the first counterweight frame (24) and the second counterweight frame (25) are both provided with a plurality of counterweight blocks (28).

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