A rotary kiln inner tank limiting structure

Abstract

A rotary kiln inner tank limiting structure comprises a frame and an inner tank, a first belt and a second belt are installed on the inner tank, the first belt is located at the feed port side, a narrow support wheel and a wide support wheel are installed on the upper part of the frame, the first belt and the narrow support wheel cooperate and the axial position remains unchanged; the second belt cooperates with the wide puller; a feed cover and a first sealing module are installed on the frame on the feed port side of the inner tank, one side of the first sealing module is fixedly connected to the feed cover, and the sealing member inside the first sealing module cooperates with the outer wall of the inner tank in a sealing manner; a second sealing module and a discharge cover are slidably installed on the frame on the discharge port side of the inner tank, one side of the second sealing module is fixedly connected to the discharge cover, and the sealing member inside the second sealing module cooperates with the outer wall of the inner tank in a sealing manner, and a plurality of connectors cooperating with the outer wall of the inner tank are installed on the other side of the second sealing module, so that the axial position of the second sealing module and the inner tank remains unchanged. Thereby reducing the wear of the sealing member in the sealing module and improving the sealing performance of the rotary kiln.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kiln sealing equipment, in particular to a rotary kiln inner tank limiting structure. Background Art

[0002] Generally, both ends of the inner tank of a rotary kiln are sealed and connected to the cover bodies at both ends. A sealing module is usually provided to seal and connect the cover body to the rotary kiln. During operation of the rotary kiln, the inner tank rotates relative to the cover body and the sealing module, and the inner tank will have axial thermal expansion problems as the temperature changes. Therefore, the contact position between the inner tank and the sealing module will change, which will accelerate the wear of the seals in the sealing module over time and shorten the service life of the sealing module.

[0003] In addition, after the radial thermal expansion deformation of the inner liner, the coaxiality of the inner liner and the sealing module changes too much, affecting the normal rotation of the inner liner. At the same time, the relative displacement between the inner liner and the sealing module also has a certain impact on the sealing effect of the seal inside the sealing module. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a rotary kiln inner tank limiting structure, thereby reducing the wear of the sealing components in the sealing module and improving the sealing performance of the rotary kiln.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A rotary kiln inner tank limiting structure comprises a frame and an inner tank, wherein a first belt is installed on the outer wall of the inner tank on the side of a feed inlet, a second belt is installed on the outer wall of the inner tank on the side of a discharge outlet, a narrow supporting wheel matched with the first belt and a wide supporting wheel matched with the second belt are installed on the upper part of the frame, and the axial positions of the first belt and the narrow supporting wheel remain unchanged;

[0007] A feed cover and a first sealing module are fixedly mounted on the frame at the feed port side of the liner, one side of the first sealing module is fixedly connected to the feed cover, and a sealing member inside the first sealing module is sealed and matched with the outer wall of the liner;

[0008] A connecting part is provided on the outer wall of the inner tank on the discharge port side, and a second sealing module and a discharge cover are slidably installed on the frame on the discharge port side of the inner tank. One side of the second sealing module is fixedly connected to the discharge cover, and the sealing member inside the second sealing module is sealed with the outer wall surface of the inner tank. A plurality of connecting members cooperating with the connecting part are installed on the other side of the second sealing module, so that the axial position of the second sealing module and the inner tank remains unchanged.

[0009] As a further improvement of the above technical solution:

[0010] The connecting portion is located on the outer wall of the inner container between the second wheel belt and the second sealing module, and the connecting portion is an annular plate structure.

[0011] The structure of a single connecting member is as follows: it includes a mounting frame, one end of which is fixedly connected to the second sealing module, and two mounting columns are relatively arranged at the lower part of the other end of the mounting frame. Bearing members are respectively installed on the two mounting columns. The two bearing members are located on both sides of the connecting part and slide with the connecting part.

[0012] The opposite surfaces of the two mounting columns are respectively provided with bearing components, and the bearing components are bull's eye bearings.

[0013] There are two narrow supporting wheels which are spaced apart on the frame, and a stopper wheel is arranged between the two narrow supporting wheels. The stopper wheel cooperates with the side surface of the first wheel belt to limit the displacement of the first wheel belt along the axial direction of the inner liner.

[0014] Elastic support platforms are installed at intervals on the upper part of the frame, and the narrow supporting wheels and the wide supporting wheels are installed on the two elastic support platforms respectively;

[0015] The first sealing module and the second sealing module have the same structure. The structure of the first sealing module is: it includes a sealing cavity shell with an annular structure, the cross-section of the sealing cavity shell is a U-shaped structure with the opening facing the center of the ring, a sealing member that seals with the outer wall of the inner liner is installed in the sealing cavity shell, the inner ring of the sealing cavity shell is gap-matched with the outer wall of the inner liner, and a limiting member that cooperates with the outer wall of the inner liner is provided on the upper part of one side of the sealing cavity shell.

[0016] The limiting members are a plurality of bearings, the centers of the bearings being located on a virtual circumferential line concentric with the inner ring of the sealing chamber shell.

[0017] The structure of the elastic support platform is as follows: it includes a perforated plate installed on a frame, a support plate parallel to the perforated plate is arranged above the perforated plate, a plurality of guide columns are installed at the lower part of the support plate, one end of the guide column is connected to the support plate, and the other end of the guide column passes through the guide through hole on the perforated plate, and a second spring is mounted on the guide column between the support plate and the perforated plate, and the two ends of the second spring respectively resist the support plate and the perforated plate.

[0018] A first slide block is installed at the lower part of the second sealing module, and a second slide block is installed at the lower part of the discharge cover. The first slide block and the second slide block are slidably connected to the slide rail installed on the frame.

[0019] The beneficial effects of the utility model are as follows:

[0020] The utility model has a compact and reasonable structure and is easy to operate. By keeping the axial positions of the first wheel belt and the narrow supporting wheel unchanged, the axial displacement of the first sealing module and the inner tank is limited, the axial positions of the second sealing module and the inner tank are kept unchanged by the matching structure of the connecting piece and the connecting part, and the end displacement of the inner tank is transferred to the discharge port position when the axial length of the inner tank changes. Since the axial positions of the first sealing module, the second sealing module and the inner tank remain unchanged, the wear of the sealing component is reduced and the sealing performance of the rotary kiln is improved.

[0021] The utility model also has the following advantages:

[0022] (1) The bearing is a bull's eye bearing. When the height of the axis of the inner tank changes, the bull's eye bearing is used to facilitate the change of the position of the connecting part and the mounting frame.

[0023] (2) By using an elastic support platform that can change the height of the support wheel and a limiter structure that cooperates with the upper part of the inner liner, when the inner liner expands radially, the upper part of the inner liner contacts the limiter, and the elastic support platform drives the support wheel to move downward, releasing the deformation of the inner liner to the lower part, preventing the inner liner from interfering with the inner ring of the sealing chamber shell, reducing the relative displacement of the seal and the sealing chamber shell, and ensuring the sealing effect.

[0024] (3) The bearing is used as a limiter, which not only plays a limit role, but also ensures that the inner tank is not restricted when rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model.

[0026] Figure 2 This is a schematic diagram of the feed end structure of the utility model (explosion state).

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0028] Figure 4 It is a schematic diagram of the structure of the discharge end of the utility model.

[0029] Figure 5 This is a schematic diagram of the discharge end structure of the utility model (from another perspective).

[0030] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0031] Figure 7 It is a structural schematic diagram of the connecting piece of the utility model (the bearing piece is a bull's eye bearing).

[0032] Figure 8 for Figure 7 Another perspective view of .

[0033] Fig. 9 It is a structural schematic diagram of the connecting piece of the utility model.

[0034] Fig.10 It is a schematic diagram of the installation structure of the first sealing module and the limiting member of the utility model.

[0035] Fig.11 It is a structural schematic diagram of the narrow supporting wheel and the elastic supporting platform of the utility model.

[0036] Fig.12 It is a structural schematic diagram of the elastic support platform of the utility model.

[0037] Among them: 1. Feed cover;

[0038] 2. First sealing module; 201. Sealing chamber shell; 202. Elastic tensioning assembly; 203. Sealing member; 21. Limiting member;

[0039] 3. Inner liner; 31. First wheel belt; 32. Second wheel belt; 33. Connecting part;

[0040] 4. Narrow supporting wheel; 41. Blocking wheel; 5. Wide supporting wheel;

[0041] 6. Connecting piece; 601. Mounting frame; 602. Mounting column; 603. Bearing piece;

[0042] 7. Second sealing module; 71. First slider; 8. Discharging cover; 81. Second slider;

[0043] 9. Elastic support platform; 901. Support plate; 902. Perforated plate; 903. Second spring; 904. Guide column;

[0044] 10. Rack. DETAILED DESCRIPTION

[0045] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0046] like Figure 1-Figure 5As shown, the rotary kiln inner tank limiting structure of the first embodiment includes a frame 10 and an inner tank 3, a first belt 31 is installed on the outer wall of the inner tank 3 on the side of the feed port, a second belt 32 is installed on the outer wall of the inner tank 3 on the side of the discharge port, and a narrow support wheel 4 matched with the first belt 31 and a wide support wheel 5 matched with the second belt 32 are installed on the upper part of the frame 10; the inner tank 3 rotates around its own axis under the drive of the motor, and the narrow support wheel 4 and the wide support wheel 5 play a supporting role. The feed port side of the inner tank 3 is higher than the discharge port side, and the circumferential surface widths of the narrow support wheel 4 and the wide support wheel 5 can be the same, or the circumferential surface width of the narrow support wheel 4 can be set to be smaller than the circumferential surface width of the wide support wheel 5; the matching relationship between the first belt 31 and the narrow support wheel 4 keeps the axial position of the first belt 31 and the narrow support wheel 4 unchanged, and a limiting structure can also be set on one side of the narrow support wheel 4 to ensure that the first belt 31 does not slide on the narrow support wheel 4. When the axial length of the inner container 3 changes, the second wheel belt 32 can slide on the wide supporting wheel 5 .

[0047] A feed cover 1 and a first sealing module 2 are fixedly mounted on the frame 10 at the feed port side of the liner 3. One side of the first sealing module 2 is fixedly connected to the feed cover 1. The sealing member 203 inside the first sealing module 2 is sealed with the outer wall of the liner 3.

[0048] A connecting portion 33 is provided on the outer wall of the inner liner 3 on the discharge port side, and a second sealing module 7 and a discharge cover 8 are slidably mounted on the frame 10 on the discharge port side of the inner liner 3. One side of the second sealing module 7 is fixedly connected to the discharge cover 8, and a sealing member 203 inside the second sealing module 7 is sealed and matched with the outer wall surface of the inner liner 3. A plurality of connecting members 6 matching the connecting portion 33 are installed on the other side of the second sealing module 7, so that the axial position of the second sealing module 7 and the inner liner 3 remains unchanged. The second sealing module 7 is matched with the connecting portion 33 on the inner liner 3 through the connecting member 6, so that when the axial length of the inner liner 3 changes, the second sealing module 7 is driven to slide with the frame 10, and the inner liner 3 rotates smoothly relative to the sealing module 7.

[0049] By keeping the axial position of the first wheel belt 31 and the narrow supporting wheel 4 unchanged, the axial displacement of the first sealing module 2 and the inner liner 3 is limited, and the axial position of the second sealing module 7 and the inner liner 3 is kept unchanged by the matching structure of the connecting piece 6 and the connecting part 33. When the axial length of the inner liner 3 changes, the end displacement of the inner liner 3 is transferred to the discharge port position. Since the axial positions of the first sealing module 2 and the second sealing module 7 and the inner liner 3 remain unchanged, the wear of the sealing component 203 is reduced and the sealing performance of the rotary kiln is improved.

[0050] like Figure 4-Figure 6 As shown, the connection portion 33 is located on the outer wall of the inner container 3 between the second wheel belt 32 and the second sealing module 7, and the connection portion 33 is an annular plate structure.

[0051] like Figure 6-Figure 9As shown, the structure of a single connecting member 6 is: it includes a mounting frame 601, one end of the mounting frame 601 is fixedly connected to the second sealing module 7, and two mounting columns 602 are relatively arranged at the lower part of the other end of the mounting frame 601, and bearing members 603 are respectively installed on the two mounting columns 602. The two bearing members 603 are located on both sides of the connecting part 33 and are slidably matched with the connecting part 33.

[0052] The two bearing members 603 play a limiting role and also facilitate the connection part 33 to rotate with the inner container 3.

[0053] like Figure 7-Figure 8 As shown, the opposite surfaces of the two mounting posts 602 are respectively provided with bearings 603, which are bull's eye bearings. The bearings 603 can be ordinary bearings or bull's eye bearings. When the axis height of the inner liner 3 changes, the bull's eye bearings are used to facilitate the position change of the connection part 33 and the mounting frame 601.

[0054] There are two narrow supporting wheels 4 and they are arranged on the frame 10 at intervals. A stopper wheel 41 is arranged between the two narrow supporting wheels 4. The stopper wheel 41 cooperates with the side of the first belt 31 to limit the displacement of the first belt 31 along the axial direction of the inner liner 3. The stopper wheel 41 is arranged as a limiting structure to limit the displacement of the first belt 31 along the axial direction of the inner liner 3.

[0055] A first slide block 71 is installed at the lower portion of the second sealing module 7 , and a second slide block 81 is installed at the lower portion of the discharge cover 8 . The first slide block 71 and the second slide block 81 are slidably connected to a slide rail installed on the frame 10 .

[0056] During the design and installation, a certain gap is left between the inner ring of the sealing chamber shell 201 and the outer wall of the inner liner 3 to ensure that the inner liner 3 can rotate relative to the sealing chamber shell 201. The outer diameter of the inner liner 3 will expand after heating. The margin of the above gap can ensure that the inner liner 3 and the inner ring of the sealing chamber shell 201 are concentric, and there is still no contact between the inner liner 3 and the inner ring of the sealing chamber shell 201. If the inner liner 3 can only deform upward due to the restriction of the supporting wheel, it may cause the inner liner 3 to interfere with the inner ring of the sealing chamber shell 201. At the same time, since the inner liner 3 moves upward, the seal 203 moves upward, and the relative displacement of the seal 203 and the sealing chamber shell 201 will cause wear on the seal 203.

[0057] like Figure 1-Figure 4 As shown, the rotary kiln inner tank limiting structure of the second embodiment further limits the radial displacement of the inner tank 3 on the basis of the first embodiment, thereby further improving the sealing performance of the rotary kiln.

[0058] Elastic support platforms 9 are installed at intervals on the upper part of the frame 10, and the narrow supporting wheels 4 and the wide supporting wheels 5 are installed on the two elastic support platforms 9 respectively;

[0059] The first sealing module 2 and the second sealing module 7 have the same structure. The structure of the first sealing module 2 is: it includes a sealing chamber shell 201 with an annular structure. The cross-section of the sealing chamber shell 201 is a U-shaped structure with the opening facing the center of the ring. A sealing member 203 is installed in the sealing chamber shell 201 and is sealed with the outer wall of the inner liner 3. The inner ring of the sealing chamber shell 201 is gap-matched with the outer wall of the inner liner 3. A limiting member 21 is provided on the upper part of one side of the sealing chamber shell 201 and is matched with the outer wall of the inner liner 3.

[0060] The seal 203 in the first sealing module 2 can be installed inside the sealing cavity shell 201 in a variety of ways. When there are two seals 203, the two seals 203 are pressed simultaneously inside the sealing cavity shell 201 from opposite sides of the seals 203 through an elastic tensioning assembly 202 installed on the inner liner 3, ensuring that the first sealing module 2 as a whole is in a sealed fit with the outer wall of the inner liner 3.

[0061] The elastic support platform 9 can change the height of the supporting wheel, and then adjust the center height of the inner liner 3. When the outer diameter of the inner liner 3 expands, when the upper part of the inner liner 3 contacts the limiter 21, the inner liner 3 is limited from deforming upward, and a certain downward pressure is applied to the inner liner 3, so that the elastic support platform 9 drives the supporting wheel to move downward, releases the deformation of the inner liner 3 to the lower part, prevents the inner liner 3 from interfering with the inner ring of the sealing chamber shell 201, reduces the relative displacement of the sealing member 203 and the sealing chamber shell 201, and ensures the sealing effect.

[0062] like Fig.10 As shown, the limiting member 21 is a plurality of bearings, and the center of the bearing is located on a virtual circumference line concentric with the inner ring of the sealing chamber shell 201. The limiting member 21 can be three bearings, and the installation angle between two adjacent bearings is 45 degrees. Using the bearing as the limiting member 21 not only plays a limiting role, but also ensures that the rotation of the inner liner 3 is not restricted.

[0063] like Figure 11-Figure 12 As shown, the structure of the elastic support platform 9 is: it includes a perforated plate 902 installed on the frame 10, a support plate 901 parallel to the perforated plate 902 is arranged above the perforated plate 902, and multiple guide columns 904 are installed at the lower part of the support plate 901, one end of the guide column 904 is connected to the support plate 901, and the other end of the guide column 904 passes through the guide through hole on the perforated plate 902, and a second spring 903 is mounted on the guide column 904 between the support plate 901 and the perforated plate 902, and the two ends of the second spring 903 respectively resist the support plate 901 and the perforated plate 902.

[0064] The upper surface of the support plate 901 is used to install the narrow support wheel 4 and the wide support wheel 5. When the deformation of the inner liner 3 is released downward, the support wheel exerts a downward force, thereby driving the support plate 901 to move downward, compressing and deforming the second spring 903, and the guide column 904 passes through the guide hole of the perforated plate 902 and moves downward.

[0065] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A rotary kiln inner tank limiting structure, comprising a frame (10) and an inner tank (3), wherein a first belt (31) is installed on the outer wall of the inner tank (3) on the feeding port side, and a second belt (32) is installed on the outer wall of the inner tank (3) on the discharging port side, characterized in that: A narrow supporting wheel (4) matched with the first wheel belt (31) and a wide supporting wheel (5) matched with the second wheel belt (32) are installed on the upper part of the frame (10), and the axial positions of the first wheel belt (31) and the narrow supporting wheel (4) remain unchanged; A feed cover (1) and a first sealing module (2) are fixedly mounted on a frame (10) on the feed port side of the inner container (3); one side of the first sealing module (2) is fixedly connected to the feed cover (1); and a sealing member (203) inside the first sealing module (2) is in sealing cooperation with an outer wall of the inner container (3); A connecting portion (33) is provided on the outer wall of the inner container (3) on the discharge port side, and a second sealing module (7) and a discharge cover (8) are slidably mounted on a frame (10) on the discharge port side of the inner container (3). One side of the second sealing module (7) is fixedly connected to the discharge cover (8), and a sealing member (203) inside the second sealing module (7) is sealingly matched with the outer wall surface of the inner container (3). A plurality of connecting members (6) matching with the connecting portion (33) are mounted on the other side of the second sealing module (7), so that the axial position of the second sealing module (7) and the inner container (3) remains unchanged.

2. A rotary kiln inner tank limiting structure as claimed in claim 1, characterized in that: The connecting portion (33) is located on the outer wall of the inner container (3) between the second wheel belt (32) and the second sealing module (7), and the connecting portion (33) is an annular plate structure.

3. A rotary kiln inner tank limiting structure according to claim 1, characterized in that: The structure of a single connecting member (6) is as follows: it includes a mounting frame (601), one end of the mounting frame (601) is fixedly connected to the second sealing module (7), and two mounting columns (602) are arranged opposite to each other at the lower part of the other end of the mounting frame (601), and bearing members (603) are respectively installed on the two mounting columns (602), and the two bearing members (603) are located on both sides of the connecting portion (33) and are slidably matched with the connecting portion (33).

4. A rotary kiln inner tank limiting structure as claimed in claim 3, characterized in that: The opposite surfaces of the two mounting columns (602) are respectively mounted with bearing components (603), and the bearing components (603) are bull's eye bearings.

5. The rotary kiln inner tank limiting structure according to claim 1, characterized in that: There are two narrow supporting wheels (4) arranged at intervals on the frame (10), and a stopper wheel (41) is arranged between the two narrow supporting wheels (4). The stopper wheel (41) cooperates with the side surface of the first wheel belt (31) to limit the displacement of the first wheel belt (31) along the axial direction of the inner liner (3).

6. A rotary kiln inner tank limiting structure according to any one of claims 1 to 5, characterized in that: Elastic support platforms (9) are installed at intervals on the upper part of the frame (10), and the narrow supporting wheel (4) and the wide supporting wheel (5) are installed on the two elastic support platforms (9) respectively; The first sealing module (2) and the second sealing module (7) have the same structure. The structure of the first sealing module (2) is as follows: it comprises a sealing cavity shell (201) of an annular structure, the cross section of the sealing cavity shell (201) being a U-shaped structure with the opening facing the center of the annular structure, a sealing member (203) which is sealed to the outer wall of the inner liner (3) is installed in the sealing cavity shell (201), the inner ring of the sealing cavity shell (201) is gap-matched with the outer wall of the inner liner (3), and a limiting member (21) which is matched with the outer wall of the inner liner (3) is arranged on the upper part of one side of the sealing cavity shell (201).

7. A rotary kiln inner tank limiting structure as claimed in claim 6, characterized in that: The limiting members (21) are a plurality of bearings, the centers of the bearings being located on a virtual circumferential line concentric with the inner ring of the sealing chamber housing (201).

8. A rotary kiln inner tank limiting structure as claimed in claim 6, characterized in that: The elastic support platform (9) has a structure as follows: it comprises a perforated plate (902) mounted on a frame (10); a support plate (901) parallel to the perforated plate (902) is arranged above the perforated plate (902); a plurality of guide columns (904) are installed at the bottom of the support plate (901); one end of the guide column (904) is connected to the support plate (901); the other end of the guide column (904) passes through a guide through hole on the perforated plate (902); a second spring (903) is mounted on the guide column (904) between the support plate (901) and the perforated plate (902); two ends of the second spring (903) respectively abut against the support plate (901) and the perforated plate (902).

9. The rotary kiln inner tank limiting structure according to claim 1, characterized in that: A first slide block (71) is installed at the lower part of the second sealing module (7), and a second slide block (81) is installed at the lower part of the discharge cover (8). The first slide block (71) and the second slide block (81) are slidably connected to a slide rail installed on the frame (10).

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