Rotary kiln tail bucket type sealing equipment

Abstract

The invention relates to the technical field of rotary kilns, in particular to rotary kiln tail bucket type sealing equipment which comprises an outer shell used for being arranged on the outer circumferential side wall of a rotary kiln barrel in a sleeving mode, one end of the outer shell is used for being fixedly connected with a smoke chamber, and the other end of the outer shell is used for being sealed with the rotary kiln barrel when the rotary kiln barrel rotates; and the material returning bucket is connected to one side, close to the smoke chamber, of the rotary kiln barrel, and a material shoveling opening of the material returning bucket corresponds to the inner wall of the outer shell. The bucket type sealing equipment is assembled in a smoke chamber and a rotary kiln barrel in a matched mode, when the rotary kiln barrel rotates, an outer shell is fixed, and the other end of the outer shell and the rotary kiln barrel are sealed. And materials adhered to the inner wall of the outer shell are cleaned through the material returning bucket and fall into the feeding opening of the rotary kiln barrel, and the material leakage problem is greatly reduced.

Description

[0001] This application is a divisional application of an invention patent whose applicant is Xuzhou Hanxi Machinery Equipment Co., Ltd., whose application date is May 26, 2019, whose application number is 201910442996.4, and whose patent name is "A bucket-type sealing device at the tail of a rotary kiln". Technical Field

[0002] The invention relates to the technical field of rotary kilns, in particular to a rotary kiln tail bucket type sealing equipment. Background Art

[0003] 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.

[0004] 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

[0005] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a rotary kiln tail bucket type sealing equipment.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: rotary kiln tail bucket type sealing equipment, including:

[0007] The outer shell is used to be sleeved on the outer circumferential side wall of the rotary kiln cylinder, and one end is used to be fixedly connected to the smoke chamber, and the other end is used to form a seal between the rotary kiln cylinder and the rotary kiln cylinder when the rotary kiln cylinder rotates;

[0008] The return material bucket is used to be connected to the side of the rotary kiln cylinder close to the smoke chamber, and its shovel opening corresponds to the inner wall of the outer shell.

[0009] A possible design also includes: a return material sleeve, which is located inside the outer shell and is used to be connected to the rotary kiln cylinder, and a plurality of return material plates are evenly distributed on the outer circumferential wall of the return material sleeve.

[0010] In a possible design, the return material plates are distributed in a spiral shape along the axial direction of the rotary kiln cylinder, and the advancing direction of the spiral is toward the return material bucket.

[0011] In a possible design, a first fish scale is fixedly provided at the other end of the outer shell for forming a seal with the rotary kiln cylinder when the rotary kiln cylinder rotates.

[0012] In a possible design, a second fish scale is disposed on the outer side of the first fish scale for forming a seal with the rotary kiln cylinder when the rotary kiln cylinder rotates.

[0013] In a possible design, a high temperature resistant sealing layer is provided between the first fish scale and the second fish scale.

[0014] In a possible design, a sealing block for abutting against the rotary kiln cylinder is fixed to one end of the first fish scale corresponding to the rotary kiln cylinder.

[0015] In a possible design, a first fish scale is fixedly provided at the other end of the outer shell for forming a seal with the rotary kiln cylinder when the rotary kiln cylinder rotates.

[0016] In a possible design, a sealing block is fixed to one end of the first fish scale sheet corresponding to the material return sleeve, and the sealing block abuts against the material return sleeve;

[0017] It also includes a cylinder flange for fixing to the rotary kiln cylinder, and a return sleeve is connected to the cylinder flange; the outer shell is matched with the rotary kiln cylinder through the first fish scale, the sealing block, the return sleeve and the cylinder flange to form a seal with the rotary kiln cylinder when the rotary kiln cylinder rotates.

[0018] A possible design also includes a weight device; the weight device includes a traction rope, a first counterweight frame provided with a counterweight block, and a first column, a first pulley is rotatably provided on the first column, one end of the traction rope is fixedly connected to the first counterweight frame, and the other end is fixed to the second column after passing around the first pulley, the outer side surface of the first fish scale or the second fish scale, or continues to pass around the second pulley rotatably provided on the second column and then fixedly connected to the second counterweight frame provided with the counterweight block.

[0019] In a possible design, a spring plate is fixed on the inner circumferential wall of the return sleeve, one end of the spring plate being hinged to the return sleeve and the other end of the spring plate being used to abut against the rotary kiln cylinder.

[0020] A possible design is that the return material bucket includes a first flange and a second flange, 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, and the two sides of the shoveling plate are respectively fixedly connected to the first flange and the second flange, and the shoveling plate and another shoveling plate adjacent to and located at the front end of the shoveling plate form the shoveling port.

[0021] After adopting the above structure, the advantages of the present invention compared with the prior art are: the bucket-type sealing equipment is assembled in the smoke chamber and the rotary kiln cylinder, and when the rotary kiln cylinder rotates, the outer shell does not move, and the other end of the outer shell is sealed with the rotary kiln cylinder; and the return bucket is used to clean the materials adhering to the inner wall of the outer shell and make the materials fall into the feeding port of the rotary kiln cylinder, which greatly reduces the problem of material leakage, and the return bucket does not contact the outer shell, thereby improving the overall adaptability to the swing of the rotary kiln tail. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the bucket type sealing equipment of the present invention.

[0023] Figure 2 It is a structural schematic diagram of the return bucket in the bucket type sealing equipment of the present invention.

[0024] Figure 3 It is a structural schematic diagram of the heavy hammer device of the present invention used in conjunction with the second fish scale piece of the bucket type sealing equipment.

[0025] 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

[0026] 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.

[0027] For example, see Figures 1 to 3 As shown:

[0028] The rotary kiln tail bucket sealing equipment 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 materials adhered to the inner wall of the outer shell 5 and make the materials fall into the feeding port of the rotary kiln cylinder 2. The return bucket 6 does not contact the outer shell 5, so as to improve 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 return The 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 upwardly along the rotation direction of the rotary kiln cylinder 2 via 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 on the shovel plate The shoveling plate 18 at the front end of the material plate 18 forms a shoveling port, and the shoveling port 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 shoveling port under the action of the shoveling 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 7 A spring plate device 9 is fixed on the inner circumferential wall, 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 to 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 performance. 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.

[0029] 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. The rotary kiln tail bucket sealing equipment is characterized by: Included are: The outer shell (5) is used to be sleeved on the outer circumferential side wall of the rotary kiln cylinder (2), and one end is used to be fixedly connected to the smoke chamber (1), and the other end is used to form a seal between the rotary kiln cylinder (2) and the rotary kiln cylinder (2) when the rotary kiln cylinder (2) rotates; The material return shovel (6) is used to be connected to the side of the rotary kiln cylinder (2) close to the smoke chamber (1), and its shovel opening corresponds to the inner wall of the outer shell (5).

2. The sealing device according to claim 1, characterized in that Also included are: The return material sleeve (7) is located inside the outer shell (5) and is used to be connected to the rotary kiln cylinder (2), and a plurality of return material plates (10) are evenly distributed on its outer circumferential wall.

3. The sealing device according to claim 2, characterized in that: The material return plate (10) is distributed in a spiral shape along the axial direction of the rotary kiln cylinder (2), and the advancing direction of the spiral is toward the material return bucket (6).

4. The sealing device according to claim 1, characterized in that: A first fish scale (11) is fixedly provided at the other end of the outer shell (5) and is used to form a seal with the rotary kiln shell (2) when the rotary kiln shell (2) rotates.

5. The sealing device according to claim 4, characterized in that: A second fish scale (12) is provided on the outer side of the first fish scale (11) for forming a seal with the rotary kiln cylinder (2) when the rotary kiln cylinder (2) rotates.

6. The sealing device according to claim 5, characterized in that: A high temperature resistant sealing layer (14) is provided between the first fish scale (11) and the second fish scale (12).

7. The sealing device according to claim 4, characterized in that: A sealing block (13) for abutting against the rotary kiln barrel (2) is fixed to one end of the first fish scale (11) corresponding to the rotary kiln barrel (2).

8. The sealing device according to claim 2, characterized in that: A first fish scale (11) is fixedly provided at the other end of the outer shell (5) and is used to form a seal with the rotary kiln shell (2) when the rotary kiln shell (2) rotates.

9. The sealing device according to claim 8, characterized in that: A sealing block (13) is fixed to one end of the first fish scale (11) corresponding to the material return sleeve (7), and the sealing block (13) abuts against the material return sleeve (7); The invention also comprises a cylinder flange (3) for fixing to the rotary kiln cylinder (2), and a material return sleeve (7) connected to the cylinder flange (3); the outer shell (5) forms a seal with the rotary kiln cylinder (2) when the rotary kiln cylinder (2) rotates through the cooperation of the first fish scale sheet (11), the sealing block (13), the material return sleeve (7) and the cylinder flange (3).

10. The sealing device according to claim 4 or 5, characterized in that: The invention also comprises a weight device (20); the weight device (20) comprises a traction rope (21), a first counterweight frame (24) provided with a counterweight block (28), and a first column (22); a first pulley (26) is rotatably provided on the first column (22); 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 column (23) after passing through the first pulley (26) and the outer side surface of the first fish scale (11) or the second fish scale (12), or continues to pass through the second pulley (27) rotatably provided on the second column (23) and then is fixedly connected to the second counterweight frame (25) provided with the counterweight block (28).

11. The sealing device according to claim 2, characterized in that: A spring plate is fixed on the inner circumferential wall of the material return sleeve (7), one end of which is hinged to the material return sleeve (7) and the other end of which is used to abut against the rotary kiln cylinder (2).

12. The sealing device according to claim 1, characterized in that: The return material shovel (6) comprises a first flange (15) and a second flange (16), a plurality of material carrying plates (17) are evenly fixed between the second flange (16) and the first flange (15), a shoveling plate (18) is fixed on the material carrying plate (17), the shoveling plate (18) extends upwardly along the rotation direction of the rotary kiln cylinder (2) via the material carrying plate (17), the two sides of the shoveling plate (18) are respectively fixedly connected to the first flange (15) and the second flange (16), and the shoveling plate (18) and another shoveling plate (18) adjacent to and located at the front end of the shoveling plate (18) form the shoveling opening.

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