Rotary kiln tail sealing device

Abstract

The utility model discloses a rotary kiln tail sealing device, which belongs to the technical field of rotary kilns and comprises a kiln body and a kiln tail cover arranged on the kiln body, a cold air sleeve extending into the kiln tail cover is arranged on the outer side of the kiln body, a friction ring is arranged on the outer side of the cold air sleeve, and a flexible filler is arranged at the end of the kiln tail cover towards the kiln body. The flexible filler is attached to the outer side of the friction ring all the time under the action of the self-compensation device, and a side pressing plate capable of moving in the width direction of the flexible filler and providing side pressure for the flexible filler all the time is arranged on one side of the self-compensation device. By means of the self-compensation device and the side pressing plate, the flexible filler can be attached to the cold air sleeve and the connecting flange all the time, the gap between the connecting flange and the cold air sleeve is sealed all the time through the flexible filler, and therefore the good sealing effect is achieved through the flexible filler.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rotary kiln technical field, and specifically relates to a rotary kiln tail sealing device. BACKGROUND

[0002] The rotary kiln is a kind of large-scale equipment for high-temperature treatment of materials, and is widely applied in cement, metallurgy, chemical industry and other industries.The rotary kiln tail sealing device is previously adopted by people in traditional fish scale sheet sealing form, and the fish scale sheet sealing structure is fixed on the circular flange by independent arc-shaped fish scale sheet, and then a center gland is pressed to the center of the arc-shaped fish scale sheet, and elastic deformation sealing ring is generated between two coaxial rings to ensure sealing.The fish scale sheet sealing structure is made of stainless steel material, and the fish scale sheet adopts superimposed sealing structure.

[0003] However, the above-mentioned fish scale sheet sealing structure has the following shortcomings:

[0004] (1) the sealing is not tight, and the sealing performance is poor, the internal oxygen content can be controlled to 20%, and the dust leakage is serious, which has influence on the environment.

[0005] (2) the internal oxygen content control of the rotary kiln in the production process is very strict, and the oxygen content cannot be too high, and it must be stable, otherwise the production quality will be reduced, and the new fish scale sheet sealing must be replaced, and the cost is increased.

[0006] (3) the environmental protection demand of domestic various production equipments is very high at present, and the dust leakage of the fish scale sheet sealing device is very large, which is not conducive to environmental protection.

[0007] (4) the fish scale sheet sealing replacement time is long, and it needs 4 to 5 days to replace each equipment. INVENTION CONTENTS

[0008] In order to solve the problems of poor sealing performance and long replacement time of the fish scale sheet sealing structure of the rotary kiln in the prior art, the utility model provides a rotary kiln tail sealing device, which can improve the sealing performance between the rotary kiln body and the kiln tail cover and shorten the replacement time.

[0009] The utility model discloses a rotary kiln tail sealing device adopts the technical scheme of:

[0010] A rotary kiln tail sealing device, including the kiln body and the kiln tail cover arranged on the kiln body, and characterized in that: the outer side of the kiln body is provided with a cold air sleeve extending into the kiln tail cover, the outer side of the cold air sleeve is provided with a friction ring, the end of the kiln tail cover towards the kiln body is provided with a flexible filler matched with the sealing cylinder, the flexible filler is always matched with the outer side of the friction ring under the action of the self-compensation device, and one side of the self-compensation device is provided with a side pressure plate which can move along the width direction of the flexible filler and always provide side pressure to the flexible filler.

[0011] The further improvement in the technical scheme of the utility model lies in that the one end of the kiln body is provided with an opening, and the opening of the kiln body is inserted into the kiln tail cover.

[0012] The further improvement in the technical scheme of the utility model lies in that the outer wall of the kiln body is connected with the inner wall of the cold air sleeve through the annular connecting plate, and the end of the cold air sleeve is connected with the kiln body through the wind baffle ring.

[0013] The further improvement in the technical scheme of the utility model lies in that the inside of the sealing cylinder is provided with two heat gas baffle walls arranged in up and down staggered mode, the heat gas baffle wall located at the upper side is connected with the inner wall of the sealing cylinder, and the heat gas baffle wall located at the lower side is connected with the friction ring.

[0014] The further improvement in the technical scheme of the utility model lies in that the end of the sealing cylinder towards the flexible filler is provided with a connecting flange, and the left and right sides of the flexible filler are respectively attached to the connecting flange and the side pressing plate; wherein the outside of the connecting flange is provided with a base plate perpendicular to the connecting flange, and the base plate, the side pressing plate and the connecting flange enclose a self-compensation space.

[0015] The further improvement in the technical scheme of the utility model lies in that the bottom end of the connecting flange is not in contact with the friction ring, and the side of the bottom end of the connecting flange towards the inside of the kiln tail cover is provided with a static labyrinth ring, and the outside of the friction ring is provided with a dynamic labyrinth ring matched with the static labyrinth ring at the position corresponding to the static labyrinth ring.

[0016] The further improvement in the technical scheme of the utility model lies in that the self-compensation device comprises an upper pressing plate movable up and down in the self-compensation space and a lower pressing plate located below the upper pressing plate and always attached to the outside of the flexible filler, and the self-compensation spring is arranged between the upper pressing plate and the lower pressing plate.

[0017] The further improvement in the technical scheme of the utility model lies in that the outside of the connecting flange is provided with a connecting rod perpendicular to the connecting flange and penetrating through the side pressing plate, the end of the connecting rod away from the connecting flange is provided with a nut, and the buffer spring is arranged between the nut and the side pressing plate and sleeved on the connecting rod.

[0018] Due to the adoption of the above technical scheme, the technical progress achieved by the utility model includes:

[0019] The utility model discloses a cold air sleeve is set up through, can adjust the concentricity of kiln body, the friction ring is set up through, can be contacted with flexible filler, prevents flexible filler and directly with kiln body contact and rubs, thereby prevents kiln body damage, and simultaneously through the cold air of blowing into between cold air sleeve and kiln body, can simultaneously to flexible filler, friction ring and the head of kiln body cooling, the self -compensation device is set up through, can always press and hold flexible filler and rub contact, prevents the gap between flexible filler and friction ring and leads to sealing failure, because side pressure plate can along the width direction of flexible filler and always provide lateral pressure to flexible filler, when flexible filler is heated and widens, side pressure plate can along the width direction of flexible filler and move, thereby always keep the clamping effect of flexible filler, make flexible filler always and connect flange and fit, through the self -compensation device and side pressure plate that set up, can make flexible filler always and friction ring and connect flange and fit, and flexible filler always keeps the sealing of the gap between connect flane and friction ring, thereby reaches good sealing effect through flexible filler.

[0020] The utility model discloses a wind baffle is set up through, when blowing into the cold air between cold air sleeve and kiln body, the cold air is blown on the inner wall of cold air sleeve and kiln body outer wall under the action of wind baffle, and the cold air that blows on kiln body outer wall can cool the head of kiln body, and the heat that flexible filler and friction ring rub and produce is transferred to the cold air sleeve through friction ring, and the cold air that blows on the inner wall of cold air sleeve can absorb the heat that is transferred to the cold air sleeve, thereby reach the cooling -down purpose of friction ring and flexible filler.

[0021] When hot air in kiln body enters kiln tail cover and sealing cylinder, the utility model discloses a hot gas retaining wall is set up through, on one hand can prevent the hot gas that enters sealing cylinder and blows on flexible filler, on the other hand, when the hot gas in sealing cylinder blows on the hot gas retaining wall that is connected with friction ring, the heat is transferred to the cold air sleeve through friction ring by hot gas retaining wall, and the cold air that blows on the inner wall of cold air sleeve can absorb the heat that is transferred to the cold air sleeve, thereby better protection flexible filler.

[0022] The utility model discloses a static labyrinth ring and dynamic labyrinth ring are set up through, can also play sealing effect on the basis of flexible filler, and the combination use with flexible filler, can further enhance the sealing effect of the utility model. ACCURACY OF DRAWINGS

[0023] Figure 1 It is a kind of rotary kiln tail sealing device's structural schematic diagram of the utility model;

[0024] Figure 2 It is a kind of rotary kiln tail sealing device Figure 1 A portion structural schematic diagram of the utility model;

[0025] Figure 3It is a section structure schematic view of B-B position of the rotary kiln tail sealing device of the utility model.

[0026] Figure 4 It is a C part structure schematic view of the rotary kiln tail sealing device of the utility model. Figure 3

[0027] In the drawing: 1, kiln body;11, cold air sleeve;12, annular connecting plate;13, wind shield ring;14, hot gas retaining wall;15, friction ring;

[0028] 2, kiln tail cover;21, connecting flange;22, base plate;23, self-compensation space;24, sealing cylinder;

[0029] 3, flexible filler;

[0030] 4, self-compensation device;41, upper pressing plate;42, lower pressing plate;43, self-compensation spring;44, protrusion;

[0031] 5, side pressing plate;51, connecting rod;52, nut;53, buffer spring. Specific embodiments

[0032] In order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the utility model is further explained in detail below by combining with specific embodiments and referring to the drawings. In the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0033] Example one

[0034] As shown in Figure 1 and Figure 2 , the utility model includes kiln body 1, the opening is set up in one end of kiln body 1, and the side of kiln body 1 with opening is provided with kiln tail cover 2 that is sleeved on kiln body 1, and the opening of kiln body 1 is located in kiln tail cover 2, and the side of kiln tail cover 2 towards kiln body 1 is connected with connecting flange 21 through sealing cylinder 24, and the connecting mode between sealing cylinder 24 and kiln tail cover 2, sealing cylinder 24 and connecting flange 21 can adopt the connecting mode commonly used in prior art such as welding or bolt connection.

[0035] Continue to refer to Figure 1 and Figure 2 ​The outer side of the kiln body 1 is fixedly sleeved with a cold air sleeve 11 which extends into the kiln tail cover 2. Specifically, the cold air sleeve 11 is connected with the kiln body 1 through an annular connecting plate 12, and the end of the cold air sleeve 11 located in the kiln tail cover 2 is connected with the kiln body 1 through a wind baffle 13. The connecting modes between the cold air sleeve 11 and the annular connecting plate 12, the annular connecting plate 12 and the kiln body 1, the cold air sleeve 11 and the wind baffle 13, and the wind baffle 13 and the kiln body 1 can adopt bolt or welding modes. When cold air is blown into the space between the cold air sleeve 11 and the kiln body 1, the cold air is blown on the inner wall of the cold air sleeve 11 and the outer wall of the kiln body 1 under the action of the wind baffle 13, and the cold air blown on the outer wall of the kiln body 1 can cool the head of the kiln body 1. The heat generated by the friction between the flexible filler 3 and the friction ring 15 is transmitted to the cold air sleeve 11 through the friction ring 15, and the cold air blown on the inner wall of the cold air sleeve 11 can absorb the heat transmitted to the cold air sleeve 11.

[0036] The outer wall of the cold air sleeve 11 is fixedly sleeved with a friction ring 15, and two hot gas baffle walls 14 are arranged in an upper and lower staggered manner between the inner wall of the sealing cylinder body 24 and the friction ring 15. The upper hot gas baffle wall 14 is connected with the inner wall of the sealing cylinder body 24, and the lower hot gas baffle wall 14 is connected with the friction ring 15. When the hot air in the kiln body 1 enters the sealing cylinder body 24, the hot gas baffle wall 14 arranged can prevent the hot gas in the sealing cylinder body 24 from being directly blown on the flexible filler 3, and when the hot gas in the sealing cylinder body 24 is blown on the hot gas baffle wall 14 connected with the friction ring 15, the hot gas baffle wall 14 transmits the heat to the cold air sleeve 11 through the friction ring 15, and the cold air blown on the inner wall of the cold air sleeve 11 can absorb the heat transmitted to the cold air sleeve 11, thereby better protecting the flexible filler 3.

[0037] Continuing to refer to Figure 1 and Figure 2 It can be known that there is a certain gap between the end of the connecting flange 21 close to the kiln body 1 and the friction ring 15, thereby facilitating the rotation of the kiln body 1 relative to the kiln tail cover 2. Meanwhile, the outer side of the connecting flange 21 is provided with an annular flexible filler 3 (such as graphite packing, high-temperature-resistant and friction-resistant rubber, etc.) which plays a sealing role. The flexible filler 3 is always closely attached to the connecting flange 21 and the cold air sleeve 11, thereby playing a sealing role.

[0038] The upper side of the flexible filler 3 is provided with a self-compensation device 4, the flexible filler 3 is always attached to the friction ring 15 under the action of the self-compensation device 4, the self-compensation device 4 comprises a lower pressing plate 42 located at the outer side of the flexible filler 3, the upper side of the lower pressing plate 42 is provided with an upper pressing plate 41, and the lower pressing plate 42 and the upper pressing plate 41 are connected through a self-compensation spring 43. Further, in order to prevent the self-compensation spring 43 from sliding between the upper pressing plate 41 and the lower pressing plate 42, the opposite sides of the upper pressing plate 41 and the lower pressing plate 42 are provided with protrusions 44, and the two ends of the self-compensation spring 43 are sleeved on the protrusions 44, so as to prevent the self-compensation spring 43 from sliding between the upper pressing plate 41 and the lower pressing plate 42.

[0039] The outer side of the connecting flange 21 is provided with a base plate 22 which is perpendicular to the connecting flange 21, the connecting mode between the base plate 22 and the connecting flange 21 can adopt a bolt or welding mode, and the end of the base plate 22 away from the connecting flange 21 is provided with a side pressing plate 5 which is parallel to the connecting flange 21 and attached to the flexible filler 3, the side pressing plate 5, the base plate 22 and the connecting flange 21 form a self-compensation space 23, the self-compensation device 4 is located in the self-compensation space 23, and in order to adjust the pressure applied by the self-compensation device 4 to the flexible filler 3, the base plate 22 is vertically penetrated by a screw rod, and the end of the screw rod located in the self-compensation space 23 is in contact with the upper pressing plate 41 of the self-compensation device 4, by rotating the screw rod, the position of the upper pressing plate 41 can be adjusted up and down, so as to adjust the compression amount of the self-compensation spring 43, and the purpose of adjusting the pressure applied by the self-compensation device 4 to the flexible filler 3 is achieved.

[0040] In the utility model, the side pressing plate 5 is provided with a connecting rod 51 which is perpendicular to the side pressing plate 5 and connected to the connecting flange 21, the connecting rod 51 can adopt a rod body such as a screw rod in the prior art, and when the connecting rod 51 is connected to the connecting flange 21, a thread or welding mode can also be adopted, and the end of the connecting rod 51 away from the connecting flange 21 is provided with a nut 52 (the connecting rod 51 and the nut 52 in the utility model can also be replaced by a commonly used screw rod in the prior art), and a buffer spring 53 is sleeved on the connecting rod 51 between the nut 52 and the side pressing plate 5, the side pressing plate 5 is always attached to the flexible filler 3 under the action of the buffer spring 53, and the flexible filler 3 is always attached to the connecting flange 21 under the action of the side pressing plate 5. Figure 3 And Figure 4 In order to avoid interference and conflict between the connecting rod 51 and the self-compensation spring 43, the connecting rod 51 and the self-compensation spring 43 should be staggered.

[0041] The flexible filler 3 always maintains sealing of the gap between the connecting flange 21 and the friction ring 15 under the action of the self-compensation device 4 and the side pressing plate 5, so as to achieve good sealing effect.

[0042] The working principle of the rotary kiln tail sealing device of the embodiment is as follows:

[0043] When the rotary kiln is in use, the cold air sleeve 11 and the friction ring 15 rotate with the kiln body 1, and when the flexible filler 3 expands due to heat, the flexible filler 3 pushes the lower pressing plate 42 and the side pressing plate 5 to move, but the flexible filler 3 is always in contact with the friction ring 15 and the connecting flange 21 under the action of the self-compensation device 4 and the side pressing plate 5, so that the flexible filler 3 always seals the gap between the connecting flange 21 and the friction ring 15, thereby achieving a good sealing effect.

[0044] When the flexible filler 3 needs to be replaced, the side pressing plate 5 is only needed to be removed and the lower pressing plate 42 is only needed to be lifted, so that the flexible filler 3 can be conveniently replaced, thereby reducing the maintenance time.

[0045] Embodiment Two

[0046] In the embodiment two, a static labyrinth ring (not shown in the figure) is arranged on the side of the bottom end of the connecting flange 21 which faces the inside of the kiln tail cover 2, a dynamic labyrinth ring (not shown in the figure) which cooperates with the static labyrinth ring is arranged on the outer side of the friction ring 15 corresponding to the position of the static labyrinth ring, a plurality of sealing grooves which cooperate with each other are arranged on the static labyrinth ring and the dynamic labyrinth ring, and the static labyrinth ring and the dynamic labyrinth ring are connected through the sealing grooves. Through the static labyrinth ring and the dynamic labyrinth ring, the sealing effect can also be achieved on the basis of the flexible filler 3, and the combination of the flexible filler 3 can further enhance the sealing effect of the rotary kiln tail sealing device.

[0047] In the above embodiments, the rotary kiln tail sealing device is provided, and the cold air sleeve can be arranged to adjust the concentricity of the kiln body. The friction ring can be arranged to contact the flexible filler, so that the flexible filler is prevented from directly contacting and rubbing the kiln body, thereby preventing the kiln body from being damaged. Meanwhile, the cold air is blown into the cold air sleeve and the kiln body, so that the flexible filler, the friction ring and the head of the kiln body can be cooled at the same time. The self-compensation device can be arranged to always press the flexible filler to contact the friction ring, so that the gap between the flexible filler and the friction ring is prevented from causing sealing failure. The side pressing plate can be arranged to move along the width direction of the flexible filler and always provide the side pressure to the flexible filler. When the flexible filler is heated and widened, the side pressing plate can move along the width direction of the flexible filler, so that the clamping effect of the flexible filler is always maintained, and the flexible filler is always in contact with the connecting flange. The self-compensation device and the side pressing plate can be arranged to make the flexible filler always contact the friction ring and the connecting flange, so that the flexible filler always seals the gap between the connecting flange and the friction ring, thereby achieving a good sealing effect through the flexible filler.

[0048] The above-described embodiments are merely preferred embodiments of the present application, and are not intended to limit the design concept and scope of the present application. Without departing from the design concept of the present application, various modifications and improvements to the technical solutions of the present application made by those of ordinary skill in the art shall fall within the protection scope of the present application, and the technical content of the present application claimed for protection has been entirely recorded in the claims.

Claims

1. A rotary kiln tail sealing device, comprising a kiln body (1) and a kiln tail cover (2) arranged on the kiln body (1), characterized in that: The outer side of the kiln body (1) is provided with a cold air sleeve (11) extending into the kiln tail cover (2), the outer side of the cold air sleeve (11) is provided with a friction ring (15), the end of the kiln tail cover (2) towards the kiln body (1) is provided with a flexible filler (3) abutting the sealing sleeve (24), the flexible filler (3) is always abutting the outer side of the friction ring (15) under the action of the self-compensation device (4), and one side of the self-compensation device (4) is provided with a side pressing plate (5) which can move along the width direction of the flexible filler (3) and always provide side pressure to the flexible filler (3).

2. A rotary kiln seal apparatus as claimed in claim 1, wherein: One end of the kiln body (1) is provided with an opening, and the opening of the kiln body (1) is inserted into the kiln tail cover (2).

3. A rotary kiln seal apparatus as claimed in claim 1, wherein: The outer wall of the kiln body (1) is connected with the inner wall of the cold air sleeve (11) through an annular connecting plate (12), and the end of the cold air sleeve (11) is connected with the kiln body (1) through a wind blocking ring (13).

4. A rotary kiln seal apparatus as claimed in claim 3, wherein: The inside of the sealing sleeve (24) is provided with two upper and lower staggered hot gas blocking walls (14), the upper hot gas blocking wall (14) is connected with the inner wall of the sealing sleeve (24), and the lower hot gas blocking wall (14) is connected with the friction ring (15).

5. A rotary kiln seal apparatus as claimed in claim 1, wherein: The end of the sealing sleeve (24) away from the kiln tail cover (2) is provided with a connecting flange (21), and the left and right sides of the flexible filler (3) are respectively abutted with the connecting flange (21) and the side pressing plate (5); wherein the outer side of the connecting flange (21) is provided with a base plate (22) perpendicular to the connecting flange (21), and the base plate (22), the side pressing plate (5) and the connecting flange (21) form a self-compensation space (23).

6. A rotary kiln seal apparatus as claimed in claim 5, wherein: The bottom end of the connecting flange (21) is not in contact with the friction ring (15), and the side of the bottom end of the connecting flange (21) towards the inside of the kiln tail cover (2) is provided with a static labyrinth ring, and the outer side of the friction ring (15) is provided with a dynamic labyrinth ring corresponding to the position of the static labyrinth ring.

7. A rotary kiln seal apparatus as claimed in claim 5, wherein: The self-compensation device (4) comprises an upper pressing plate (41) which can move up and down in the self-compensation space (23) and a lower pressing plate (42) which is below the upper pressing plate (41) and always abuts the outer side of the flexible filler (3), and a self-compensation spring (43) is arranged between the upper pressing plate (41) and the lower pressing plate (42).

8. A rotary kiln seal apparatus as claimed in claim 7, wherein: The outer side of the connecting flange (21) is provided with a connecting rod (51) perpendicular to the connecting flange (21) and penetrating through the side pressing plate (5), the end of the connecting rod (51) away from the connecting flange (21) is provided with a nut (52), and a buffer spring (53) is arranged between the nut (52) and the side pressing plate (5).

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