A rotary kiln head sealing device for titanium dioxide production

Abstract

The utility model relates to a titanium dioxide production rotary kiln kiln head sealing device belongs to rotary kiln sealing technical field, including kiln head cover, rotary kiln cylinder, fixed flange, installation ring board, the fixed fish scale sealing plate has on installation ring board, the fish scale sealing plate includes inner fish scale board and outer fish scale board, and is equipped with flexible heat preservation interlayer board between inner fish scale board and outer fish scale board, and the steel wire rope is wound to the outer side of the one end of fish scale sealing board far from kiln head cover, and the fixed mounting bolt has on installation ring board, and the mounting hole that is crossed for mounting bolt is evenly equipped with on inner fish scale board and outer fish scale board, and is equipped with locking nut on mounting bolt, and is equipped with the avoidance opening slot that avoids mounting bolt on heat preservation interlayer board. The utility model changes from original single -layer sealing to double -layer fish scale board plus heat preservation interlayer board structure, prevents the change of the ventilation of kiln from the entry of a large number of cold air, reduces the heat loss. The setting of avoidance opening slot can conveniently install bolt and set up, and avoid the interference of heat preservation interlayer board to installation.

Description

Technical Field

[0001] This utility model relates to a sealing device for the kiln head of a titanium dioxide production rotary kiln, belonging to the field of rotary kiln sealing technology. Background Technology

[0002] In the titanium dioxide production process, the rotary kiln is a key piece of equipment for calcining materials. The kiln head, as the inlet and outlet for high-temperature materials and flue gas, directly affects production efficiency, product quality, and energy consumption. Traditional rotary kiln head sealing devices mostly use a single metal fish-scale plate sealing structure, which has the following shortcomings: The single metal fish scale plate seal allows cold air to easily pass through, causing changes in the air circulation inside the kiln. The lack of effective insulation results in significant heat loss and increased energy consumption. Utility Model Content

[0003] This invention provides a sealing device for the kiln head of a rotary kiln in titanium dioxide production, which solves the problems mentioned in the background art.

[0004] This utility model relates to a sealing device for the kiln head of a titanium dioxide production rotary kiln, including a fixed flange fixed to the kiln head cover and fitted onto the rotary kiln body. The fixed flange has an mounting ring plate, and a fish-scale sealing plate is fixed to the mounting ring plate. The fish-scale sealing plate includes an inner fish-scale plate and an outer fish-scale plate, with a flexible insulation sandwich plate between the inner and outer fish-scale plates. A steel wire rope is wound around the outer side of the fish-scale sealing plate away from the kiln head cover. Mounting bolts are fixed to the mounting ring plate. Both the inner and outer fish-scale plates have mounting holes for the mounting bolts to pass through. Locking nuts are provided on the mounting bolts. The insulation sandwich plate has a clearance slot to avoid the mounting bolts. A clamping ring groove is provided on the fixed flange on the outer side of the mounting ring plate. The inner end of the insulation sandwich plate extends into the clamping ring groove to form a clamping flange, and the end of the outer fish-scale plate rests against the clamping flange.

[0005] As a preferred embodiment, the mounting holes of the outer fish-scale plate are strip-shaped holes along the axial direction of the mounting ring plate, and the insulation sandwich panel is a flexible composite silicate board. During installation, the outer fish-scale plate can be moved axially, allowing it to enter the clamping ring groove for better tightening and pressing of the flange.

[0006] As a preferred embodiment, the outer side of the fish-scale plate is provided with multiple elastic limiting metal plates. The outer end of the elastic limiting metal plates is provided with a limiting hook to hook the steel wire rope, and the inner end of the elastic limiting metal plates is fixed with an arc-shaped fixing plate, which is mounted on the mounting bolts. This allows for better use of the steel wire rope to tighten the outer end of the fish-scale sealing plate, and the limiting hook can prevent the steel wire rope from slipping off from the outer end.

[0007] As a preferred option, the inner surface of the inner fish-scale plate is coated with an epoxy resin anti-corrosion coating. The epoxy resin anti-corrosion coating has excellent anti-corrosion and wear-resistant properties, which can effectively extend the service life of the inner fish-scale plate and reduce the frequency of maintenance and replacement due to corrosion and wear.

[0008] As a preferred embodiment, pull plates are fixed to both ends of the wire rope, and tensioning slide rods are fixed to both ends of the pull plates. A bracket is fitted onto the upper part of the tensioning slide rod, and a spring is fitted onto the tensioning slide rod below the bracket. An adjusting nut with threads is installed at the lower part of the spring and mounted on the lower part of the tensioning slide plate. The spring provides elastic tension to adapt to the dynamic changes of the rotary kiln shell, while the adjusting nut can adjust the compression of the spring, thereby adjusting the tension and ensuring that the fish-scale sealing plate always fits tightly against the rotary kiln shell.

[0009] As a preferred embodiment, the upper part of the tensioning slide rod is fitted with a guide sleeve. The guide sleeve guides the movement of the tensioning slide rod, ensuring its linear motion and improving the stability of the tensioning device. The guide sleeve is fixed to the bracket, and the lower end of the spring is fitted with a spring seat sleeve. The top of the adjusting nut is provided with a spherical support portion that supports the bottom of the spring seat sleeve. The spherical support portion makes the force between the adjusting nut and the spring seat sleeve more even, and at the same time can accommodate the slight wobble of the spring seat sleeve, reducing wear and extending the service life of the tensioning device.

[0010] As a preferred embodiment, a pull ring is fixed to the center of the top of the pull rod, and a fixing sleeve is fitted onto the lower end of the wire rope. The fixing sleeve is equipped with a locking bolt. The head of the wire rope passes around the pull ring and extends into the fixing sleeve, where it is then locked with the locking bolt. This connection method facilitates the installation and disassembly of the wire rope, and allows for quicker adjustment or replacement of the wire rope during maintenance.

[0011] This utility model has the following beneficial effects: The original single-layer seal was changed to a double-layer fish-scale plate plus insulation sandwich panel structure to prevent a large amount of cold air from entering and causing changes in the air volume inside the kiln, thereby reducing heat loss.

[0012] The avoidance slot design facilitates the insertion and installation of bolts, preventing the insulation sandwich panel from interfering with the installation. By tightening the flange and the end of the outer fish scale plate, the sealing reliability between the insulation sandwich panel and the fixed flange is further improved, and the insulation sandwich panel is better prevented from moving and loosening along the axial direction. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Partial structural diagram Figure 1 ; Figure 3 for Figure 1 Partial structural diagram Figure 2 ; Figure 4 This is a cross-sectional structural diagram of the fish-scale sealing plate. Figure 5 This is a partial structural diagram of an insulation sandwich panel. In the diagram: 1. Kiln head hood; 2. Fixed flange; 3. Outer fish scale plate; 4. Rotary kiln body; 5. Fixed plate; 6. Insulation sandwich plate; 7. Locking nut; 8. Elastic limiting metal plate; 9. Mounting bolt; 10. Inner fish scale plate; 11. Steel wire rope; 12. Mounting ring plate; 13. Spring; 14. Pull plate; 15. Pull ring; 16. Tensioning slide bar; 17. Bracket; 18. Spring seat sleeve; 19. Adjusting nut. Detailed Implementation

[0014] The present invention will be further described below with reference to the embodiments.

[0015] Example 1, such as Figures 1 to 5 As shown, this utility model is a sealing device for the kiln head of a titanium dioxide production rotary kiln, including a fixing flange 2 fixed on the kiln head cover 1 and fitted onto the rotary kiln body 4. The fixing flange 2 is provided with an installation ring plate 12, and a fish scale sealing plate is fixed on the installation ring plate 12. The fish scale sealing plate includes an inner fish scale plate 10 and an outer fish scale plate 3. A flexible heat-insulating sandwich plate 6 is provided between the inner fish scale plate 10 and the outer fish scale plate 3. A steel wire rope 11 is wound around the outer side of the fish scale sealing plate away from the kiln head cover 1. An installation bolt 9 is fixed on the installation ring plate 12. Both the inner fish scale plate 10 and the outer fish scale plate 3 are provided with installation holes for the installation bolt 9 to pass through. A locking nut 7 is provided on the installation bolt 9. The heat-insulating sandwich plate 6 is provided with a clearance opening groove to avoid the installation bolt 9. The fixing flange 2 on the outer side of the installation ring plate 12 is provided with a pressing ring groove. The inner end of the heat-insulating sandwich plate 6 extends into the pressing ring groove to form a pressing flange. The end of the outer fish scale plate 3 rests on the pressing flange.

[0016] During installation, the mounting holes of the inner fish scale plate 10 are fitted onto the mounting bolts 9, and then the insulation sandwich plate 6 is pressed on. The mounting bolts 9 are avoided by the avoidance opening groove. The inner end of the insulation sandwich plate 6 extends into the clamping ring groove to form a clamping flange. Then the outer fish scale plate 3 is pressed on, and the outer side of the fish scale sealing plate is pulled by the steel wire rope 11.

[0017] When the rotary kiln body 4 rotates, the inner fish-scale plate 10 of the fish-scale sealing plate comes into contact with the surface of the body. The multi-layer structure, combined with the tension of the steel wire rope 11, ensures that the fish-scale sealing plate fits tightly against the rotary kiln body 4; this prevents a large amount of cold air from entering and causing changes in the ventilation volume inside the kiln; and the heat-insulating sandwich plate 6 reduces heat loss from the kiln head.

[0018] In Example 2, based on Example 1, the mounting holes of the outer fish-scale plate 3 are strip-shaped holes along the axial direction of the mounting ring plate 12, and the insulation sandwich plate 6 is a flexible composite silicate board. The insulation sandwich plate 6 can also be a carbon-silicon-aluminum composite board. During installation of the outer fish-scale plate 3, after the mounting holes of the outer fish-scale plate 3 are fitted onto the mounting bolts 9, the outer fish-scale plate 3 can be moved axially, causing the inner end of the outer fish-scale plate 3 to be tightly pressed against the flange.

[0019] Multiple elastic limiting metal plates 8 are provided on the outer side of the outer fish scale plate 3. The outer end of the elastic limiting metal plate 8 is provided with a limiting hook edge to hook the wire rope 11. The inner end of the elastic limiting metal plate 8 is fixed with an arc-shaped fixing plate 5, which is installed on the mounting bolt 9. When the wire rope 11 is installed and tightened, the limiting hook edge will prevent the wire rope 11 from slipping outward.

[0020] The inner surface of the inner fish scale plate is coated with an epoxy resin anti-corrosion coating.

[0021] The wire rope 11 is fixed with pull plates 14 at both ends, and tensioning slide rods 16 are fixed with both ends of the pull plates 14. A bracket 17 is fitted on the upper part of the tensioning slide rod 16, and a spring 13 is fitted on the tensioning slide rod 16 below the bracket 17. The lower part of the spring 13 is provided with an adjusting nut 19 threaded and installed on the lower part of the tensioning slide plate.

[0022] The upper part of the tensioning slide bar 16 is fitted with a guide sleeve, which is fixed to the bracket 17. The lower end of the spring 13 is fitted with a spring seat sleeve 18. The top of the adjusting nut 19 is provided with a spherical support part that supports the bottom of the spring seat sleeve 18. The tensioning slide bar 16 is preferably set at an angle, which makes it easier to tighten the wire rope 11.

[0023] A pull ring 15 is fixed at the top center of the pull rod. A fixing sleeve is fitted onto the lower end of the wire rope 11, and a locking bolt is provided on the fixing sleeve. The head of the wire rope 11 passes around the pull ring 15 and extends into the fixing sleeve, where it is then locked with the locking bolt. During installation, the wire rope 11 is wound upwards from both sides at the bottom, then crosses at the top. The head of the wire rope 11 then comes down, passes around the pull ring 15, extends into the fixing sleeve, and is secured with the locking bolt. The preload of the spring 13 can then be adjusted by rotating the adjusting nut 19 as needed.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0025] In the description of this utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A sealing device for the kiln head of a titanium dioxide production rotary kiln, comprising a fixing flange (2) fixed on the kiln head cover (1) and fitted onto the rotary kiln body (4), wherein the fixing flange (2) is provided with an mounting ring plate (12), and a fish-scale sealing plate is fixed on the mounting ring plate (12), characterized in that: The fish scale sealing plate includes an inner fish scale plate (10) and an outer fish scale plate (3). A flexible heat insulation sandwich plate (6) is provided between the inner fish scale plate (10) and the outer fish scale plate (3). A steel wire rope (11) is wrapped around the outer side of the fish scale sealing plate away from the kiln head cover (1). An installation bolt (9) is fixed on the mounting ring plate (12). The inner fish scale plate (10) and the outer fish scale plate (3) are provided with mounting holes for the installation bolt (9) to pass through. A lock nut (7) is provided on the installation bolt (9). The heat insulation sandwich plate (6) is provided with a clearance opening groove to avoid the installation bolt (9). A pressing ring groove is provided on the fixing flange (2) on the outer side of the mounting ring plate (12). The inner end of the heat insulation sandwich plate (6) extends into the pressing ring groove to form a pressing flange. The end of the outer fish scale plate (3) rests on the pressing flange.

2. The sealing device for the kiln head of a titanium dioxide production rotary kiln according to claim 1, characterized in that: The mounting holes of the outer fish scale plate (3) are strip-shaped holes along the axial direction of the mounting ring plate (12), and the thermal insulation sandwich plate (6) is a flexible composite silicate plate.

3. The sealing device for the kiln head of a titanium dioxide production rotary kiln according to claim 1, characterized in that: Multiple elastic limiting metal plates (8) are provided on the outer side of the outer fish scale plate (3). The outer end of the elastic limiting metal plate (8) is provided with a limiting hook edge that hooks the wire rope (11). The inner end of the elastic limiting metal plate (8) is fixed with an arc-shaped fixing plate (5). The fixing plate (5) is installed on the mounting bolt (9).

4. The sealing device for the kiln head of a titanium dioxide production rotary kiln according to claim 1, characterized in that: The inner surface of the inner fish scale plate is coated with an epoxy resin anti-corrosion coating.

5. The sealing device for the kiln head of a titanium dioxide production rotary kiln according to claim 1, characterized in that: The wire rope (11) is fixed with a pull plate (14) at both ends, and a tensioning slide rod (16) is fixed with both ends of the pull plate (14). A bracket (17) is fitted on the upper part of the tensioning slide rod (16), and a spring (13) is fitted on the tensioning slide rod (16) below the bracket (17). The lower part of the spring (13) is provided with an adjusting nut (19) threaded and installed on the lower part of the tensioning slide plate.

6. The sealing device for the kiln head of a titanium dioxide production rotary kiln according to claim 5, characterized in that: The upper part of the tensioning slide bar (16) is fitted with a guide sleeve, which is fixed on the bracket (17). The lower end of the spring (13) is fitted with a spring seat sleeve (18), and the top of the adjusting nut (19) is provided with a spherical support part that supports the bottom of the spring seat sleeve (18).

7. A sealing device for the kiln head of a titanium dioxide production rotary kiln according to claim 5, characterized in that: A pull ring (15) is fixed in the middle of the top of the pull rod. A fixed sleeve is fitted on the lower end of the wire rope (11). A locking bolt is provided on the fixed sleeve. The head of the wire rope (11) passes around the pull ring (15) and extends into the fixed sleeve, and is then locked with the locking bolt.

Images