Rotary kiln end face sealing device

Abstract

The utility model provides a rotary kiln end face sealing device, belongs to the technical field of rotary kiln sealing, and aims to solve the problem that an existing rotary kiln is prone to gas leakage and smoking. Comprising a kiln body and a box body, a first sealing assembly and a second sealing assembly are arranged on the kiln body and the box body correspondingly, the first sealing assembly comprises a fixing plate arranged on the kiln body in a sleeving mode, a sealing movable ring is arranged on the fixing plate, the second sealing assembly comprises a sealing ring plate, an air outlet is formed in the sealing ring plate, and the end, away from the box body, of the sealing ring plate is slidably sleeved with an abutting plate; the sealing device is characterized in that a sealing movable ring is arranged on the sealing ring plate, an abutting plate is arranged on the sealing movable ring, one end of the abutting plate is provided with a sealing static ring, the sealing static ring is in abutting contact with the sealing movable ring through an abutting device, and oil injection holes are formed in the abutting plate and the sealing static ring in a penetrating mode. And the sealing moving ring, the sealing static ring and the lubricating grease are used for sealing, the sealing effect is good, and the maintenance workload is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary kiln sealing, and in particular relates to a rotary kiln end face sealing device. Background Art

[0002] A rotary kiln is required in the process of treating mud phosphorus. The rotary kiln includes a rotatable kiln body and a box body. When the kiln body is in operation, it rotates. The material is converted into phosphorus vapor and dust after being subjected to high temperature. The phosphorus vapor enters the box body through the kiln body, and the dust is transported into the box body through the threaded structure in the kiln body. When the phosphorus vapor enters the box body, it is easy to leak at the connection between the kiln body and the box body, causing a safety accident. Based on this, the prior art uses radial sealing to seal the gap between the box body and the kiln body, mainly by installing asbestos packing in the gap between the kiln body and the box body, and setting a pressure ring to press the asbestos packing to achieve sealing.

[0003] The prior art has the following deficiencies:

[0004] When the rotary kiln is started up, the vibration of the rotary kiln is the largest, which causes gaps to appear at the sealing points even after sealing, and it is easy to leak and smoke. Utility Model Content

[0005] In view of this, the utility model provides a rotary kiln end face sealing device to solve the problem that the existing rotary kiln has the largest vibration at the beginning of startup, resulting in gaps at the sealing point even after sealing, which is prone to air leakage and smoke.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A rotary kiln end face sealing device comprises a kiln body and a box body, wherein the kiln body and the box body are respectively provided with a first sealing component and a second sealing component that cooperate with each other, wherein the first sealing component comprises a fixed plate sleeved on the kiln body, wherein the fixed plate is provided with a sealing dynamic ring at one end facing the box body, and the second sealing component comprises a sealing ring plate fixed on the box body, wherein the sealing ring plate is provided with an air outlet, and the sealing ring plate surrounds the kiln body, wherein a pressing plate is slidably sleeved on one end of the sealing ring plate away from the box body, wherein a sealing static ring is provided at one end of the pressing plate facing the sealing dynamic ring, wherein the sealing static ring is in tight contact with the sealing dynamic ring through a pressing device, and oil injection holes are penetrated through the pressing plate and the sealing static ring.

[0008] In this technical solution, it should be noted that the fixing plate is in a ring plate structure and is welded to the kiln body. The fixing plate rotates with the rotation of the kiln body. The sealing moving ring is fixed on the fixing plate and is used to cooperate with the sealing static ring to achieve the sealing effect. The sealing static ring is fixed on the pressing plate. The pressing plate always presses the sealing static ring and the sealing moving ring tightly through the pressure of the pressing device. The oil injection hole is externally connected to an oil injection device, and grease is injected between the sealing moving ring and the sealing static ring through the oil injection hole, so that an oil film is formed between the sealing static ring and the sealing moving ring, improving the sealing effect. The air outlet is externally connected to a sealed water tank, and the phosphorus vapor is cooled by passing through the air outlet into the water tank or the cooling tower to form liquid phosphorus for collection. In the specific implementation of this solution, after the phosphorus vapor and dust enter the box body, a part of the phosphorus vapor and dust will enter the gap between the sealing ring plate and the kiln body. At this time, the sealing moving ring and the sealing static ring seal it. At the same time, the lubricating grease injected into the oil injection hole forms an oil film between the sealing moving ring and the sealing static ring, further improving the sealing effect and preventing the leakage of phosphorus vapor and dust. And this part of the phosphorus vapor enters the sealed water tank through the air outlet for cooling to form liquid phosphorus. To sum up, this solution improves the traditional radial sealing to axial sealing, that is, the phosphorus vapor will enter the gap between the sealing ring plate and the kiln body along the axial direction of the kiln body and is sealed by the sealing moving ring, the sealing static ring and the lubricating grease, with good sealing effect and reduced maintenance workload.

[0009] Preferably, the pressing device includes a mounting plate fixed on the fixing plate. A pressing rod slides through the mounting plate. A nut is screwed on the pressing rod. One end of the pressing rod is provided with a pressing block that contacts the pressing plate. A spring is also sleeved on the pressing rod. One end of the spring is connected to the mounting plate, and the other end is connected to the nut on the pressing rod. There are multiple pressing devices, and the multiple pressing devices are equidistantly arranged at intervals along the circumferential direction of the fixing plate.

[0010] In this technical solution, it should be noted that the spring is always in a compressed state and can give the pressing rod a pulling force in the direction away from the fixing plate, so that the pressing block at the end of the pressing rod always presses the pressing plate tightly, ensuring the sealing effect between the sealing moving ring and the sealing static ring.

[0011] Preferably, a first annular baffle is provided inside the sealing ring plate. There is a gap between the first annular baffle and the side wall of the kiln body. A second annular baffle is provided on the side wall of the kiln body. The second annular baffle is located on one side of the first annular baffle, and there is a gap between the second annular baffle and the sealing ring plate. A conveying thread is provided on the outer wall of the kiln body, and the conveying direction after the rotation of the conveying thread faces the box body.

[0012] In this technical solution, it should be noted that the number of the first annular baffle and the second annular baffle is two respectively, and they are arranged in an alternating manner. By setting the first annular baffle and the second annular baffle, a large amount of dust can be blocked. After being blocked, the dust is conveyed into the box for collection by the rotation of the conveying thread on the outer wall of the kiln body.

[0013] Preferably, a static sealing device is further provided on the box body. The static sealing device includes a first ring body, the first ring body is connected to the box body, a second ring body is connected to one side of the first ring body close to the fixed plate, and the second ring body is connected to the sealing ring plate; an annular block is provided on the side of the first ring body away from the fixed plate, there is a gap between the annular block and the sealing ring plate, and packing is filled between the first ring body and the sealing ring plate.

[0014] In this technical solution, it should be noted that since phosphorus gas is still likely to leak at the connection between the sealing ring plate and the box body, based on this, in this solution, a first ring body, a second ring body, an annular block and packing are provided. Phosphorus vapor enters the space surrounded by the first ring body and the sealing ring plate from the gap between the sealing ring plate and the box body, and is blocked by the packing, achieving the sealing effect.

[0015] Preferably, an oil receiving box is provided below the kiln body, and the oil receiving box is located below the dynamic sealing ring and the static sealing ring.

[0016] In this technical solution, it should be noted that the provided oil receiving box is used to collect the lubricating grease dripping from between the dynamic sealing ring and the static sealing ring.

[0017] Preferably, a bracket is provided on one side of the kiln body. The kiln body is rotatably connected to the bracket. A toothed ring is provided around the side wall of the kiln body. A motor is provided below the kiln body, and a gear meshing with the toothed ring is provided at the output end of the motor.

[0018] In this technical solution, it should be noted that the motor drives the gear to rotate. After the gear rotates, it drives the toothed ring meshing with it to rotate, thereby realizing the rotation of the kiln body.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0020] 1. In the present utility model, the traditional radial sealing is improved to axial sealing, that is, phosphorus vapor will enter the gap between the sealing ring plate and the kiln body along the axial direction of the kiln body, and is sealed by the dynamic sealing ring, the static sealing ring and the lubricating grease. The sealing effect is good and the maintenance workload is reduced;

[0021] 2. In the present utility model, the spring is always in a compressed state, which can apply a pulling force to the pressing rod in the direction away from the fixing plate, so that the pressing block at the end of the pressing rod always presses against the pressing plate, ensuring the sealing effect between the dynamic sealing ring and the static sealing ring;

[0022] 3. In the present utility model, the first annular baffle and the second annular baffle can block a large amount of dust. After being blocked, the dust is transmitted to the box body for collection by the rotation of the conveying thread on the outer wall of the kiln body;

[0023] 4. In the present utility model, there are a first ring body, a second ring body, an annular block body and a sealing packing. The phosphorus vapor enters the space enclosed by the first ring body and the sealing ring plate through the gap between the sealing ring plate and the box body, and is blocked by the sealing packing to achieve the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present utility model will be described by way of examples and with reference to the accompanying drawings, wherein:

[0025] Figure 1 is a three-dimensional structure schematic diagram of the present utility model;

[0026] Figure 2 is Figure 1 a sectional structure schematic diagram after cutting;

[0027] Figure 3 is a disassembled three-dimensional structure schematic diagram of the kiln body and the second sealing assembly of the present utility model;

[0028] Figure 4 is an inclined three-dimensional structure schematic diagram after cutting of the present utility model;

[0029] Wherein: 1 - box body, 2 - kiln body, 3 - mounting plate, 4 - nut, 5 - spring, 6 - pressing block, 7 - fixing plate, 8 - dynamic sealing ring, 9 - static sealing ring, 10 - pressing plate, 11 - oil injection hole, 12 - sealing ring plate, 13 - first annular baffle, 14 - second annular baffle, 15 - first ring body, 16 - annular block body, 17 - sealing packing, 18 - second ring body, 19 - air outlet, 20 - pressing rod, 21 - oil receiving box, 22 - bracket, 23 - motor, 24 - gear, 25 - toothed ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model described and illustrated herein can generally be arranged and designed in a variety of different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0032] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0033] It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0035] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0036] Embodiment 1

[0037] As Figures 1-4As shown in the figure, an end face sealing device for a rotary kiln is disclosed in an embodiment of the present utility model, which includes a kiln body 2 and a box body 1. The kiln body 2 and the box body 1 are respectively provided with a first sealing component and a second sealing component that cooperate with each other. The first sealing component includes a fixing plate 7 sleeved on the kiln body 2. One end of the fixing plate 7 facing the box body 1 is provided with a sealing dynamic ring 8. The second sealing component includes a sealing ring plate 12 fixed on the box body 1. The sealing ring plate 12 is provided with an air outlet, and the sealing ring plate 12 surrounds the kiln body 2. One end of the sealing ring plate 12 away from the box body 1 is slidably sleeved with a pressing plate 10. One end of the pressing plate 10 facing the sealing dynamic ring 8 is provided with a sealing static ring 9. The sealing static ring 9 is in pressing contact with the sealing dynamic ring 8 through a pressing device. The pressing plate 10 and the sealing static ring 9 are provided with an oil injection hole 11 through them. It should be noted that the fixing plate 7 is in a ring plate structure and is welded on the kiln body 2. The fixing plate 7 rotates with the rotation of the kiln body 2. The sealing dynamic ring 8 is fixed on the fixing plate to cooperate with the sealing static ring 9 to achieve the sealing effect. The sealing static ring 9 is fixed on the pressing plate 10. The pressing plate 10 always presses the sealing static ring 9 and the sealing dynamic ring 8 tightly through the pressure of the pressing device. The oil injection hole 11 is externally connected to an oil injection device, and grease is injected between the sealing dynamic ring 8 and the sealing static ring 9 through the oil injection hole 11, so that an oil film is formed between the sealing static ring 9 and the sealing dynamic ring 8, improving the sealing effect; the air outlet is externally connected to a sealing water tank, and phosphorus gas is introduced into the water tank or cooling tower through the air outlet for cooling to form liquid phosphorus for collection; in the specific implementation of this solution, after phosphorus vapor and dust enter the box body 1, a part of the phosphorus vapor and dust will enter the gap between the sealing ring plate 12 and the kiln body 2. At this time, the sealing dynamic ring 8 and the sealing static ring 9 seal it. At the same time, the lubricating grease injected into the oil injection hole 11 forms an oil film between the sealing dynamic ring 8 and the sealing static ring 9, further improving the sealing effect and preventing the leakage of phosphorus vapor and dust. And this part of the phosphorus vapor enters the sealing water tank through the air outlet for cooling to form liquid phosphorus.

[0038] As Figure 2 shown, in this embodiment, the pressing device includes a mounting plate 3 fixed on the fixing plate 7. A pressing rod 20 is slidably passed through the mounting plate 3. A nut 4 is screwed on the pressing rod 20. One end of the pressing rod 20 is provided with a pressing block 6 which contacts the pressing plate 10. A spring 5 is also sleeved on the pressing rod 20. One end of the spring 5 is connected to the mounting plate 3, and the other end is connected to the nut 4 on the pressing rod 20. The pressing devices are multiple, and the multiple pressing devices are arranged at equal intervals along the circumferential direction of the fixing plate 7. It should be noted that the spring 5 is always in a compressed state, which can give the pressing rod 20 a pulling force in the direction away from the fixing plate 7, so that the pressing block 6 at the end of the pressing rod 20 always presses the pressing plate 10 tightly, ensuring the sealing effect between the sealing dynamic ring 8 and the sealing static ring 9.

[0039] AsFigure 2 As shown in the figure, in this embodiment, a first annular baffle 13 is provided inside the sealing ring plate 12. There is a gap between the first annular baffle 13 and the side wall of the kiln body 2. A second annular baffle 14 is provided on the side wall of the kiln body 2. The second annular baffle 14 is located on one side of the first annular baffle 13, and there is a gap between the second annular baffle 14 and the sealing ring plate 12. A conveying thread (not shown in the figure) is provided on the outer wall of the kiln body 2, and the conveying direction after the rotation of the conveying thread is towards the box body 1. It should be noted that the number of the first annular baffle 13 and the second annular baffle 14 is two respectively, and they are arranged alternately. By providing the first annular baffle 13 and the second annular baffle 14, a large amount of dust can be blocked. After being blocked, the dust is conveyed into the box body 1 for collection through the rotation of the conveying thread on the outer wall of the kiln body 2.

[0040] As Figure 2 As shown in the figure, in this embodiment, a static sealing device is further provided on the box body 1. The static sealing device includes a first ring body 15. The first ring body 15 is connected to the box body 1. A second ring body 18 is connected to the side of the first ring body 15 close to the fixing plate 7, and the second ring body 18 is connected to the sealing ring plate 12. An annular block 16 is provided on the side of the first ring body 15 away from the fixing plate 7. There is a gap between the annular block 16 and the sealing ring plate 12, and a sealing packing 17 is filled between the first ring body 15 and the sealing ring plate 12. It should be noted that since phosphorus gas is still likely to leak at the connection between the sealing ring plate 12 and the box body 1, based on this, the first ring body 15, the second ring body 18, the annular block 16 and the sealing packing 17 are provided in this solution. Phosphorus vapor enters the space enclosed by the first ring body 15 and the sealing ring plate 12 from the gap between the sealing ring plate 12 and the box body 1 and is blocked by the sealing packing 17 to achieve the sealing effect.

[0041] Embodiment 2

[0042] As Figure 1 As shown in the figure, this embodiment is substantially the same as the above embodiment. The difference is that an oil receiving box 21 is provided below the kiln body 2, and the oil receiving box 21 is located below the sealing dynamic ring 8 and the sealing static ring 9. It should be noted that the provided oil receiving box is used to collect the lubricating grease dripping from between the sealing dynamic ring 8 and the sealing static ring 9.

[0043] As Figure 4As shown, this embodiment is substantially the same as the above-mentioned embodiment, except that a bracket 22 is provided on one side of the kiln body 2. The kiln body 2 is rotatably connected to the bracket 22. A toothed ring 25 is disposed around the side wall of the kiln body 2. A motor 23 is provided below the kiln body 2, and a gear 24 meshing with the toothed ring 25 is provided at the output end of the motor 23. It should be noted that by driving the gear 24 to rotate by the motor 23, the toothed ring 25 meshing with the gear 24 is driven to rotate after the gear 24 rotates, thereby realizing the rotation of the kiln body 2.

[0044] The circuits, electronic components and modules involved are all prior arts and can be fully realized by those skilled in the art without further elaboration. The content protected by the present invention also does not involve improvements to software and methods.

[0045] In this specification, the various embodiments are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rotary kiln end face sealing device, characterized in that, It includes a kiln body (2) and a box body (1). A first sealing assembly and a second sealing assembly which cooperate with each other are respectively provided on the kiln body (2) and the box body (1). The first sealing assembly includes a fixing plate (7) sleeved on the kiln body (2). A sealing moving ring (8) is provided at one end of the fixing plate (7) facing the box body (1). The second sealing assembly includes a sealing ring plate (12) fixed on the box body (1). An air outlet (19) is provided on the sealing ring plate (12), and the sealing ring plate (12) surrounds the kiln body (2). A pressing plate (10) is slidably sleeved at one end of the sealing ring plate (12) away from the box body (1). A sealing static ring (9) is provided at one end of the pressing plate (10) facing the sealing moving ring (8). The sealing static ring (9) is in pressing contact with the sealing moving ring (8) through a pressing device. An oil injection hole (11) penetrates through the pressing plate (10) and the sealing static ring (9).

2. The end face sealing device of a rotary kiln according to claim 1, characterized in that, The pressing device includes a mounting plate (3). The mounting plate (3) is fixed on the fixing plate (7). A pressing rod (20) slidably passes through the mounting plate (3). A nut (4) is screwed on the pressing rod (20). A pressing block (6) is provided at one end of the pressing rod (20). The pressing block (6) contacts the pressing plate (10). A spring (5) is also sleeved on the pressing rod (20). One end of the spring (5) is connected to the mounting plate (3), and the other end is connected to the nut (4) on the pressing rod (20).

3. The end face sealing device of a rotary kiln according to claim 1, characterized in that, There are multiple pressing devices, and the multiple pressing devices are arranged at equal intervals along the circumferential direction of the fixing plate (7).

4. A rotary kiln end face sealing device according to claim 1, characterized in that, A first annular baffle (13) is provided inside the sealing ring plate (12). There is a gap between the first annular baffle (13) and the side wall of the kiln body (2). A second annular baffle (14) is provided on the side wall of the kiln body (2). The second annular baffle (14) is located on one side of the first annular baffle (13), and there is a gap between the second annular baffle (14) and the sealing ring plate (12).

5. A rotary kiln end face sealing device according to claim 4, characterized in that, A conveying thread is provided on the outer wall of the kiln body (2), and the conveying direction after the conveying thread rotates is towards the box body (1).

6. The end face sealing device of a rotary kiln according to claim 1, characterized in that, A static sealing device is also provided on the box body (1). The static sealing device includes a first ring body (15). The first ring body (15) is connected to the box body (1). A second ring body (18) is connected to one side of the first ring body (15) close to the fixing plate (7). The second ring body (18) is connected to the sealing ring plate (12). An annular block (16) is provided on one side of the first ring body (15) away from the fixing plate (7). There is a gap between the annular block (16) and the sealing ring plate (12), and a sealing packing (17) is filled between the first ring body (15) and the sealing ring plate (12).

7. A rotary kiln end face sealing device according to claim 1, characterized in that, An oil receiving box (21) is provided below the kiln body (2), and the oil receiving box (21) is located below the sealing moving ring (8) and the sealing static ring (9).

8. A rotary kiln end face sealing device according to claim 1, characterized in that, A support (22) is provided on one side of the kiln body (2). The kiln body (2) is rotatably connected to the support (22). A toothed ring (25) is circumferentially provided on the side wall of the kiln body (2). A motor (23) is provided below the kiln body (2), and a gear (24) meshing with the toothed ring (25) is provided at the output end of the motor (23).

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