Scale-shaped sealing structure for rotary kiln tail

Abstract

The invention relates to the technical field of rotary kilns, in particular to a scale-shaped sealing structure for a rotary kiln tail, which comprises a long sealing piece and a short sealing piece which are positioned at the joint of a kiln head and the kiln tail, and a sealing ring is fixedly connected to the outer wall of the kiln tail. Locking assemblies used for fixing the long sealing piece to the kiln head or fixing the short sealing piece to the kiln head are arranged between the end, close to the kiln head, of the long sealing piece and the kiln head and between the end, close to the kiln head, of the short sealing piece and the kiln head correspondingly, and a first wear-resisting rubber sealing block is arranged at the end, close to the kiln tail, of the long sealing piece. The long sealing piece is provided with a first fixing assembly used for fixing the first wear-resistant rubber sealing block to the long sealing piece, the end, close to the kiln tail, of the short sealing piece is provided with a second wear-resistant rubber sealing block, and the short sealing piece is provided with a second fixing assembly used for fixing the second wear-resistant rubber sealing block to the short sealing piece. A sealing groove formed in the circumferential direction of the sealing ring is formed in the outer arc face of the sealing ring. The rotary kiln has the effect of improving the sealing effect of the rotary kiln.

Description

Technical Field

[0001] The present application relates to the technical field of rotary kilns, and in particular to a scale-type sealing structure for the tail of a rotary kiln. Background Art

[0002] A rotary kiln is a thermal equipment widely used in industries such as building materials, metallurgy, chemical engineering, and environmental protection, and is mainly used for processes such as calcination, roasting, and heat treatment of materials.

[0003] The scale-type seal used at the tail of a rotary kiln is a common sealing method, mainly used to prevent external air from entering the system and the gas in the system from carrying materials and leaking, thereby avoiding environmental pollution and reducing energy consumption. This sealing method is mainly composed of a sealing ring connected to the cylinder body and a scale group at the end of the outer cylinder, and is realized through contact sealing.

[0004] However, in related technologies, the scale-type seal has some disadvantages. For example, the contact between the scales and the sealing ring will cause wear of the scales. Especially when the rotary kiln operates in a high-temperature environment, the wear will accelerate, resulting in seal failure, thereby affecting the sealing effect of the rotary kiln. Summary of the Invention

[0005] In order to improve the sealing effect of a rotary kiln, the present application provides a scale-type sealing structure for the tail of a rotary kiln.

[0006] The scale-type sealing structure for the tail of a rotary kiln provided by the present application adopts the following technical solution: A scale-type sealing structure for the tail of a rotary kiln includes a long sealing piece and a short sealing piece located at the connection between the kiln head and the kiln tail. The long sealing piece and the short sealing piece are arranged alternately, and the long sealing piece and the short sealing piece are arranged around the connection between the kiln head and the kiln tail. A sealing ring is fixedly connected to the outer wall of the kiln tail. Between one end of the long sealing piece close to the kiln head and one end of the short sealing piece close to the kiln head and the kiln head, there are locking components for fixing the long sealing piece or the short sealing piece on the kiln head. One end of the long sealing piece close to the kiln tail is provided with a first wear-resistant rubber sealing block, and the long sealing piece is provided with a first fixing component for fixing the first wear-resistant rubber sealing block on the long sealing piece. One end of each short sealing piece close to the kiln tail is provided with a second wear-resistant rubber sealing block, and the short sealing piece is provided with a second fixing component for fixing the second wear-resistant rubber sealing block on the short sealing piece. A sealing groove is formed on the outer arc surface of the sealing ring along the circumferential direction of the sealing ring, and the first wear-resistant rubber sealing block and the second wear-resistant rubber sealing block are both placed in the sealing groove.

[0007] By adopting the above technical solution, the first wear-resistant rubber seal block and the second rubber seal block can be restricted in the seal groove of the seal ring. Thus, the first wear-resistant rubber seal block and the second rubber seal block can slide in the seal groove, and the sealing performance of the long seal piece and the short seal piece at the connection of the kiln head and the kiln tail can be improved by the first wear-resistant rubber seal block and the second rubber seal block. At the same time, the first wear-resistant rubber seal block and the second rubber seal block can play a protective role for the long seal piece and the short seal piece, reducing the wear between the long seal piece and the short seal piece and the kiln tail.

[0008] Optionally, the locking assembly includes a plurality of locking bolts threadedly connected to the long seal piece and threadedly connected to the short seal piece, and the rod portion of the locking bolt is threadedly connected to the kiln head.

[0009] By adopting the above technical solution, the disassembly of the long seal piece and the short seal piece on the kiln head can be realized by rotating the locking bolt.

[0010] Optionally, a limiting groove surrounding the kiln tail is formed on the outer wall of the kiln tail opposite to the seal ring, and the seal ring is fixedly connected in the limiting groove.

[0011] By adopting the above technical solution, the stability of the seal ring in the limiting groove can be improved by the limiting groove.

[0012] Optionally, the first fixing assembly includes a first fixing block fixedly connected to the long seal piece. A first fixing bolt is threadedly connected to the long seal piece, the rod portion of the first fixing bolt is threadedly connected to the first wear-resistant rubber seal block, and the nut of the first fixing bolt is placed outside the seal groove.

[0013] By adopting the above technical solution, the long seal piece and the first wear-resistant rubber block can be connected by the first fixing block, and thus the long seal piece and the first wear-resistant rubber block can be relatively stably connected together.

[0014] Optionally, the second fixing assembly includes a second fixing block fixedly connected to the short seal piece. A second fixing bolt is threadedly connected to the short seal piece, the rod portion of the second fixing bolt is threadedly connected to the second fixing block, and the nut of the second fixing bolt is placed outside the seal groove.

[0015] By adopting the above technical solution, the long seal piece and the second wear-resistant rubber block can be connected by the second fixing block, and thus the short seal piece and the second wear-resistant rubber block can be relatively stably connected together.

[0016] Optionally, a pressing groove is formed in the sealing groove, a support plate is placed in the pressing groove, and a plurality of support springs are fixedly connected between the support plate and the bottom of the pressing groove. A pressing mechanism for pressing the first fixing bolt into the pressing groove is provided on the kiln tail.

[0017] By adopting the above technical solution, after long-term operation, there will be a certain gap between the first wear-resistant rubber seal block on the long sealing piece and the second wear-resistant rubber seal block on the short sealing piece and the sealing groove. The pressing mechanism can be used to press the first wear-resistant rubber seal block and the second wear-resistant rubber seal block towards the bottom of the sealing groove, so that the ends of the long sealing piece and the short sealing piece are bent downward into the pressing groove to a certain extent. Thus, the first wear-resistant rubber seal block and the second wear-resistant rubber seal block move into the pressing groove, thereby reducing the distance between the first wear-resistant rubber seal block and the second wear-resistant rubber seal and the sealing groove, and further achieving the effect of reducing the distance between the second wear-resistant rubber seal block and the first wear-resistant rubber seal block and the sealing groove.

[0018] Optionally, the pressing mechanism includes a mounting frame fixedly connected to the kiln tail. A guiding steel belt is arranged in the mounting frame. Support wheels are arranged on both sides of the guiding steel belt. The guiding steel belt is sleeved on the support wheels. A butting wheel is arranged in the guiding steel belt and is located below the support wheels. A connecting rod is inserted through and slidably connected to the mounting frame. The connecting rod passes through the guiding steel belt and is rotatably connected to the butting wheel. A positioning component for fixedly connecting the connecting rod to the mounting frame is arranged on the mounting frame.

[0019] By adopting the above technical solution, the guiding steel belt can be supported by the support wheels, and the ground of the guiding steel belt has a certain inclination angle due to the downwardly arranged butting wheel and support wheels, which facilitates the nut of the first fixing bolt to enter below the guiding steel belt. Subsequently, when the cap of the first fixing bolt enters the lower part of the guiding steel belt, the guiding steel belt can press the nut of the first bolt into the pressing groove under the action of the butting wheel, and then press the end of the long sealing piece, thereby realizing the pressing of the first wear-resistant rubber seal block. The height of the butting wheel can be adjusted by the connecting rod, and the connecting rod can be fixed by the positioning component, so that the butting height of the guiding steel belt against the first fixing bolt can be changed, and then the downward probing height of the butting fixing bolt in the pressing groove can be changed, thereby changing the bending degree of the long sealing piece.

[0020] Optionally, the connecting rod is arranged as a screw rod. The positioning component includes an upper fixing nut and a lower fixing nut threadedly connected to the connecting rod. The upper side wall of the mounting frame is located between the upper fixing nut and the lower fixing nut, and the upper fixing nut and the lower fixing nut are abutted against the mounting frame.

[0021] By adopting the above technical solution, the upper fixing nut and the lower fixing nut can be rotated simultaneously to move the upper fixing nut and the lower fixing nut along the screw rod, thereby realizing the change of the height of the screw rod.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The first wear-resistant rubber seal block and the second rubber seal block can improve the sealing performance of the long seal piece and the short seal piece at the connection between the kiln head and the kiln tail. At the same time, the first wear-resistant rubber seal block and the second rubber seal block can play a protective role for the long seal piece and the short seal piece, reducing the wear between the long seal piece and the short seal piece and the kiln tail; 2. The ends of the long seal piece and the short seal piece can be bent downward into the downward pressing groove to a certain extent, so that the first wear-resistant rubber seal block and the second wear-resistant rubber seal block move into the downward pressing groove, thereby reducing the distance between the first wear-resistant rubber seal block and the second wear-resistant rubber seal and the seal groove, and further achieving the effect of reducing the distance between the second wear-resistant rubber seal block and the first wear-resistant rubber seal and the seal groove; 3. The height of the abutting wheel can be adjusted through the connecting rod, and the connecting rod can be fixed by the positioning component. Furthermore, the abutting height of the guiding steel belt against the first fixing bolt can be changed, and then the downward probing height of the abutting fixing bolt in the downward pressing groove can be changed, thereby changing the bending degree of the long seal piece. Description of the Drawings

[0023] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a schematic diagram of the structure of the seal groove of an embodiment of the present application; Figure 3 is a schematic diagram of the structure of the downward pressing groove of an embodiment of the present application; Figure 4 is a schematic diagram of the structure of the abutting wheel of an embodiment of the present application.

[0024] In the figure, 1, long seal piece; 2, short seal piece; 3, seal ring; 31, limiting groove; 32, downward pressing groove; 4, locking assembly; 41, locking bolt; 5, first wear-resistant rubber seal block; 6, second wear-resistant rubber seal block; 7, first fixing assembly; 71, first fixing block; 72, first fixing bolt; 8, second fixing assembly; 81, second fixing block; 82, second fixing bolt; 9, support spring; 10, support plate; 11, downward pressing mechanism; 111, mounting frame; 112, guiding steel belt; 113, support wheel; 114, abutting wheel; 115, connecting rod; 116, positioning component; 1161, upper fixing nut; 1162, lower fixing nut; 117, seal groove. Detailed Embodiments

[0025] The following is combined with the attachedFigure 1 - Appendix Figure 4 , the present application will be further described in detail.

[0026] An embodiment of the present application is: a scale-type sealing structure for the tail of a rotary kiln. Referring to Figure 1 and Figure 2 , it includes a plurality of long sealing sheets 1 and a plurality of short sealing sheets 2 located at the connection between the kiln head and the kiln tail. Both the long sealing sheets 1 and the short sealing sheets 2 are made of stainless steel plates with certain bending properties. The long sealing sheets 1 and the short sealing sheets 2 are arranged alternately, and the long sealing sheets 1 on both sides of the short sealing sheet 2 press the short sealing sheet 2 against the connection between the kiln head and the kiln tail.

[0027] The long sealing sheets 1 and the short sealing sheets 2 are arranged around the connection between the kiln head and the kiln tail. A sealing ring 3 is fixedly connected to the outer wall of the kiln tail. A sealing groove 117 is provided on the outer arc surface of the sealing ring 3 along the circumferential direction of the sealing ring 3. A limiting groove 31 is provided on the outer wall of the kiln tail opposite to the sealing ring 3 and is arranged around the kiln tail, and the sealing ring 3 is fixedly connected in the limiting groove 31.

[0028] A locking assembly 4 is provided between the end of the long sealing sheet 1 close to the kiln head and the end of the short sealing sheet 2 close to the kiln head and the kiln head for fixing the long sealing sheet 1 to the kiln head or fixing the short sealing sheet 2 to the kiln head.

[0029] The locking assembly 4 includes a plurality of locking bolts 41 threadedly connected to the long sealing sheet 1 and the short sealing sheet 2. In this embodiment, two locking bolts 41 are provided on each long sealing sheet 1. The rod portion of the locking bolt 41 is threadedly connected to the kiln head and at the same time the rod portion of the locking bolt 41 is threadedly connected to the long sealing sheet 1 and the short sealing sheet 2.

[0030] A first wear-resistant rubber sealing block 5 is provided at the end of the long sealing sheet 1 close to the kiln tail, and a first fixing assembly 7 is provided on the long sealing sheet 1 for fixing the first wear-resistant rubber sealing block 5 to the long sealing sheet 1.

[0031] The first fixing assembly 7 includes a first fixing block 71 fixedly connected to the long sealing sheet 1. A first fixing bolt 72 is threadedly connected to the long sealing sheet 1. The rod portion of the first fixing bolt 72 is threadedly connected to the first wear-resistant rubber sealing block 5, and the nut of the first fixing bolt 72 is placed outside the sealing groove 117.

[0032] Second wear-resistant rubber sealing blocks 6 are provided at the ends of the short sealing sheets 2 close to the kiln tail, and the first wear-resistant rubber sealing block 5 is placed in the sealing groove 117. A second fixing assembly 8 is provided on the short sealing sheet 2 for fixing the second wear-resistant rubber sealing block 6 to the short sealing sheet 2. The second fixing component 8 includes a second fixing block 81 fixedly connected to the short sealing piece 2, and the second wear-resistant rubber sealing block 6 is placed in the sealing groove 117. A second fixing bolt 82 is threadedly connected to the short sealing piece 2, the rod portion of the second fixing bolt 82 is threadedly connected to the second fixing block 81, and the nut of the second fixing bolt is placed outside the sealing groove 117.

[0033] A pressing groove 32 is formed in the sealing groove 117, and the pressing groove 32 is formed along the length direction of the sealing groove 117 and its length is greater than the distance between two adjacent long sealing pieces 1.

[0034] Refer to Figure 2 、 Figure 3 and Figure 4 As shown in

[0035] A support plate 10 is placed in the pressing groove 32. The support plates 10 are provided in plurality and the plurality of support plates 10 are arranged along the length direction of the pressing groove 32. The support plates 10 are arranged as arc-shaped plates. A plurality of support springs 9 are fixedly connected between the support plates 10 and the bottom of the pressing groove 32. A pressing mechanism 11 is provided on the kiln tail for pressing the first fixing bolt 72 into the pressing groove 32.

[0036] The pressing mechanism 11 includes a mounting frame 111 fixedly connected to the kiln tail, and the mounting frame 111 is arranged in a gate shape. A guiding steel belt 112 is arranged inside the mounting frame 111, and the guiding steel belt 112 is arranged as an annular steel belt with a certain deformation ability. Support wheels 113 are arranged on both sides of the guiding steel belt 112, and the guiding steel belt 112 is sleeved on the support wheels 113 and expanded by the support wheels 113. A contact wheel 114 is arranged inside the guiding steel belt 112, and the contact wheels 114 are grouped in pairs and arranged in four. The contact wheels 114 are placed below the support wheels 113, and under the contact of the contact wheels 114, the guiding steel belt 112 is integrally arranged in a trapezoid shape with a wider upper part and a narrower lower part. The nut of the first fixing bolt 72 is placed directly below the guiding steel belt 112.

[0037] A connecting rod 115 is inserted through and slidably connected to the mounting frame 111. The connecting rods 115 are provided in two and arranged in parallel. In this embodiment, the connecting rod 115 is arranged as a threaded rod. The connecting rod 115 passes through the guiding steel belt 112 and is rotatably connected to the contact wheel 114. A positioning component 116 is provided on the mounting frame 111 for fixedly connecting the connecting rod 115 to the mounting frame 111.

[0038] Therefore, when there is a certain gap between the first wear-resistant rubber seal block 5 on the long seal piece 1 and the second wear-resistant rubber seal block 6 on the short seal piece 2 and the seal groove 117, the upper fixing nut 1161 and the lower fixing nut 1162 can be rotated simultaneously to make the upper fixing nut 1161 and the lower fixing nut 1162 move along the screw rod, so that the connecting rod 115 drives the abutting wheel 114 to move downward and makes the guiding steel belt 112 press downward on the extension of one side of the groove 32. And the guiding steel belt 112 is in a trapezoidal shape with a wider upper part and a narrower lower part. When the nut of the first fixing bolt 72 passes through the guiding steel belt 112. The guiding steel belt 112 can press the nut of the first bolt downward in the groove 32 under the action of the abutting wheel 114, and then press the end of the long seal piece 1 downward, thereby realizing the downward pressing of the first wear-resistant rubber seal block 5. At this time, since the long seal pieces 1 on both sides of the short seal piece 2 press the short seal piece 2 tightly at the connection of the kiln head and the kiln tail, the short seal piece 2 will also be pressed downward and undergo a certain deformation. Furthermore, the distance between the first wear-resistant rubber seal block 5 and the second wear-resistant rubber seal block 6 and the seal groove 117 is reduced, and further the effect of reducing the distance between the second wear-resistant rubber seal block 6 and the first wear-resistant rubber seal block 5 and the seal groove 117 is achieved.

[0039] The embodiments of the specific implementation manners are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A scale-type sealing structure for the tail of a rotary kiln, characterized in that: The invention comprises a long sealing sheet (1) and a short sealing sheet (2) located at the connection between the kiln head and the kiln tail, wherein the long sealing sheet (1) and the short sealing sheet (2) are arranged alternately, and the long sealing sheet (1) and the short sealing sheet (2) are arranged around the connection between the kiln head and the kiln tail, and a sealing ring (3) is fixedly connected to the outer wall of the kiln tail, and a locking assembly (4) for fixing the long sealing sheet (1) on the kiln head or fixing the short sealing sheet (2) on the kiln head is arranged between the end of the long sealing sheet (1) close to the kiln head and the end of the short sealing sheet (2) close to the kiln head and the kiln head, and the end of the long sealing sheet (1) close to the kiln tail is provided with a first wear-resistant rubber sealing block (5 ), the long sealing sheet (1) is provided with a first fixing component (7) for fixing the first wear-resistant rubber sealing block (5) on the long sealing sheet (1), the short sealing sheet (2) is provided with a second wear-resistant rubber sealing block (6) at one end close to the kiln tail, the short sealing sheet (2) is provided with a second fixing component (8) for fixing the second wear-resistant rubber sealing block (6) on the short sealing sheet (2), the outer arc surface of the sealing ring (3) is provided with a sealing groove (117) arranged along the circumference of the sealing ring (3), and the first wear-resistant rubber sealing block (5) and the second wear-resistant rubber sealing block (6) are both placed in the sealing groove (117).

2. A scale-type sealing structure for a rotary kiln tail according to claim 1, characterized in that: The locking assembly (4) comprises a plurality of locking bolts (41) threadedly connected to the long sealing sheet (1) and threadedly connected to the short sealing sheet (2), and the rods of the locking bolts (41) are threadedly connected to the kiln head.

3. The scale-type sealing structure for the tail of a rotary kiln according to claim 1, characterized in that: A limiting groove (31) arranged around the kiln tail is provided on the outer wall of the kiln tail facing the sealing ring (3), and the sealing ring (3) is fixedly connected in the limiting groove (31).

4. The scale-type sealing structure for the tail of a rotary kiln according to claim 1, characterized in that: The first fixing assembly (7) comprises a first fixing block (71) fixedly connected to the long sealing sheet (1), a first fixing bolt (72) being threadedly connected to the long sealing sheet (1), a rod portion of the first fixing bolt (72) being threadedly connected to the first wear-resistant rubber sealing block (5), and a nut of the first fixing bolt (72) being disposed outside the sealing groove (117).

5. The scale-type sealing structure for the tail of a rotary kiln according to claim 1, characterized in that: The second fixing assembly (8) comprises a second fixing block (81) fixedly connected to the short sealing sheet (2), a second fixing bolt (82) being threadedly connected to the short sealing sheet (2), a rod portion of the second fixing bolt (82) being threadedly connected to the second fixing block (81), and a nut of the second fixing bolt (82) being disposed outside the sealing groove (117).

6. A scale-type sealing structure for a rotary kiln tail according to claim 4, characterized in that: A downward pressing groove (32) is provided on the sealing groove (117), a support plate (10) is placed in the downward pressing groove (32), a plurality of support springs (9) are fixedly connected between the support plate (10) and the bottom of the downward pressing groove (32), and a downward pressing mechanism (11) for pressing the first fixing bolt (72) downward into the downward pressing groove (32) is provided on the kiln tail.

7. A scale-type sealing structure for the tail of a rotary kiln according to claim 6, characterized in that: The pressing mechanism (11) comprises a mounting frame (111) fixedly connected to the kiln tail, a guide steel belt (112) being provided inside the mounting frame (111), support wheels (113) being provided on both sides of the guide steel belt (112), the guide steel belt (112) being sleeved on the support wheels (113), an abutment wheel (114) being provided inside the guide steel belt (112), the abutment wheel (114) being placed below the support wheel (113), a connecting rod (115) being passed through and slidably connected to the mounting frame (111), the connecting rod (115) passing through the guide steel belt (112) and being rotationally connected to the abutment wheel (114), and a positioning assembly (116) for fixedly connecting the connecting rod (115) to the mounting frame (111) being provided on the mounting frame (111).

8. The scale-type sealing structure for the tail of a rotary kiln according to claim 7, characterized in that: The connecting rod (115) is configured as a screw rod, the positioning assembly (116) comprises an upper fixing nut (1161) and a lower fixing nut (1162) threadedly connected to the connecting rod (115), an upper side wall of the mounting frame (111) is placed between the upper fixing nut (1161) and the lower fixing nut (1162), and the upper fixing nut (1161) and the lower fixing nut (1162) are pressed against the mounting frame (111).

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