Sealing structure and rotary kiln equipment

Abstract

This invention provides a sealing structure and a rotary kiln device. The sealing structure includes a fixing component, a first flange, a sealing shell, and a sealing element. The fixing component is sleeved on the conveying pipe, with its inner wall either fitting snugly against or having a gap with the outer peripheral wall of the conveying pipe. The first flange is fixedly sleeved on the conveying pipe and makes sealing contact with the outer peripheral wall of the conveying pipe. The second end of the fixing component is fixedly connected to the first flange. The sealing shell is sleeved on the outside of the fixing component to form a sealing space between the sealing shell and the fixing component. One end of the sealing shell is fixedly connected to and makes sealing contact with the furnace cylinder. The sealing element is disposed within the sealing space, making sealing contact with both the fixing component and the sealing shell. The sealing structure of this application can effectively seal the connection between the furnace cylinder and the conveying pipe, solving the problem of poor sealing effect in the existing sealing methods at the connection between the furnace cylinder and the feed or discharge pipe.

Description

Technical Field

[0001] This invention relates to the field of rotary kiln equipment technology, and more specifically, to a sealing structure and rotary kiln equipment. Background Technology

[0002] With the development of thermal phase separation technology, the demand for rotary kilns has increased; among them, externally heated rotary kilns are relatively ideal equipment.

[0003] During operation, the temperature of the rotary kiln drum ranges from approximately 400°C to 700°C. The larger the diameter and length of the drum, the more likely it is to vibrate during operation. Therefore, leakage of high-temperature non-condensable gases within the drum is inevitable to some extent. Furthermore, because the drum operates under high temperatures for extended periods, high-temperature creep is unavoidable over time, causing the drum axis to bend. Consequently, the gas leakage problem gradually amplifies as the equipment operates.

[0004] Non-condensable gases separated by thermal phase separation are flammable and explosive gases with high calorific value. Due to their complex composition, pungent odor, and certain toxicity, leakage of non-condensable gases from the furnace cylinder can cause environmental pollution, create an explosive atmosphere, and pose an explosion risk. Furthermore, the pungent odor and toxicity of the gas can also affect the health of operators and surrounding personnel. Therefore, a good sealing structure is crucial for the safe operation of the equipment.

[0005] When the equipment is in use, in order to convey materials into the furnace of rotary kiln equipment or to output materials from the furnace, one end of the furnace needs to be connected to a feed pipe or a discharge pipe. While the furnace rotates relative to the feed pipe or the discharge pipe, the connection between the furnace and the feed pipe, and the connection between the furnace and the discharge pipe, need to be kept sealed to prevent the leakage of non-condensable gases inside the furnace.

[0006] Because these rotary devices are large in size and inevitably experience jumping, swaying, and axial movement during rotation, fish scale seals and end-face mechanical seals are currently the main methods used to solve the dynamic sealing problem. However, existing sealing methods have the problem of poor sealing performance. Summary of the Invention

[0007] The main objective of this invention is to provide a sealing structure and rotary kiln equipment to solve the problem of poor sealing effect in the existing sealing methods at the connection between the furnace cylinder and the feed pipe or discharge pipe.

[0008] To achieve the above objectives, according to one aspect of the present invention, a sealing structure is provided for use in a rotary kiln, the rotary kiln including a furnace cylinder and a conveying pipe, a first end of the conveying pipe extending into the furnace cylinder, the conveying pipe being fixedly disposed, and the furnace cylinder being rotatably disposed; the sealing structure includes: a fixing component, the fixing component being sleeved on the conveying pipe, the inner wall of the fixing component being in contact with or having a gap with the outer peripheral wall of the conveying pipe; along the axial direction of the conveying pipe, the fixing component having a first end and a second end disposed opposite to each other, the second end of the fixing component being located on the side of its first end away from the furnace cylinder; a first flange, the first flange being fixedly sleeved on the conveying pipe and sealingly contacting the outer peripheral wall of the conveying pipe; the second end of the fixing component being fixedly connected to the first flange; a sealing shell, the sealing shell being sleeved on the outside of the fixing component to form a sealing space between the sealing shell and the fixing component; along the axial direction of the conveying pipe, the sealing shell having two ends disposed opposite to each other, the end of the sealing shell near the furnace cylinder being fixedly connected to and sealingly contacting the furnace cylinder; and a sealing member, the sealing member being disposed within the sealing space, the sealing member sealingly contacting the fixing component and sealingly contacting the sealing shell.

[0009] Furthermore, along the axial direction of the conveying pipeline, the sealing member has a first end and a second end disposed opposite to each other; the sealing structure further includes: a baffle and a clamping part, the baffle abutting against the first end of the sealing member, and the clamping part abutting against the second end of the sealing member, so as to limit the sealing member in the axial direction of the conveying pipeline and generate an axial clamping force on the sealing member; wherein, at least a portion of the sealing member is made of a flexible material so that when the sealing member is subjected to the axial clamping force, the sealing member deforms to expand in a direction perpendicular to the axial direction of the conveying pipeline.

[0010] Furthermore, the baffle is fixedly connected to the fixing assembly, and the tightening part is adjustable in position along the axial direction of the conveying pipe.

[0011] Furthermore, the sealing component includes one or multiple packings arranged sequentially along the axial direction of the delivery pipe.

[0012] Furthermore, the sealing structure also includes a slewing support, which includes an inner ring and an outer ring located outside the inner ring, and the outer ring and the inner ring are rotatably arranged relative to each other; the sealing shell is connected to the outer ring of the slewing support, and the fixing component is connected to the inner ring of the slewing support.

[0013] Furthermore, the sealing structure also includes: a second flange, which is fixedly connected to the sealing shell and to the outer ring of the slewing bearing; and / or a third flange, which is detachably connected to the inner ring of the slewing bearing and to the fixing assembly; when the third flange is connected to the inner ring of the slewing bearing and to the fixing assembly, the inner ring of the slewing bearing is connected to and relatively fixed to the fixing assembly through the third flange.

[0014] Furthermore, the fixing assembly includes: a shaft sleeve, which is fitted onto the conveying pipeline, and a sealing shell fitted onto the outside of the shaft sleeve to form a sealing space between the sealing shell and the shaft sleeve; a sealing component in sealing contact with the shaft sleeve; a connecting pipe, which is fitted onto the conveying pipeline, with a first end of the connecting pipe fixedly connected to and in sealing contact with the second end of the shaft sleeve; the second end of the connecting pipe fixedly connected to a first flange; and at least a portion of the connecting pipe is a corrugated pipe section.

[0015] Furthermore, the connecting pipe includes a plurality of designated pipe sections spaced apart along its axial direction, each of which is a corrugated pipe section.

[0016] Furthermore, a gas channel is provided on the fixed component, the first end of which is used to introduce inert gas, and the space between the first end of the fixed component and the furnace cylinder is connected to the second end of the gas channel.

[0017] According to another aspect of the present invention, a rotary kiln apparatus is provided, which includes a furnace cylinder, a conveying pipeline, and the aforementioned sealing structure.

[0018] According to the technical solution of the present invention, the sealing structure includes a fixing component, a first flange, a sealing shell, and a sealing element. The fixing component is sleeved on the conveying pipe, and the inner wall of the fixing component is in contact with or has a gap with the outer peripheral wall of the conveying pipe. Along the axial direction of the conveying pipe, the fixing component has a first end and a second end that are arranged opposite to each other, and the second end of the fixing component is located on the side of its first end away from the furnace cylinder. The first flange is fixedly sleeved on the conveying pipe and is in sealing contact with the outer peripheral wall of the conveying pipe, that is, the inner wall surface of the first flange is in sealing contact with the outer peripheral wall of the conveying pipe. The second end of the fixing component is fixedly connected to the first flange.

[0019] A sealing shell is fitted over the outside of a fixed assembly. The sealing shell and the fixed assembly are spaced apart in a direction perpendicular to the axial direction of the conveying pipe to form a sealing space between them. Along the axial direction of the conveying pipe, the sealing shell has a first end and a second end that are opposite to each other. The first end of the sealing shell is located on the side of its second end closer to the furnace cylinder. The first end of the sealing shell is fixedly connected to and in sealing contact with the furnace cylinder. A sealing component is disposed within the sealing space. The sealing component is in sealing contact with the fixed assembly and also in sealing contact with the sealing shell. That is, the inner wall surface of the sealing component is in sealing contact with the fixed assembly, and the outer peripheral wall of the sealing component is in sealing contact with the sealing shell.

[0020] When the inner wall of the stationary component is completely fitted to the outer wall of the conveying pipe, gas flowing out from the connection point between the furnace cylinder and the conveying pipe cannot enter the space between the inner wall of the stationary component and the outer wall of the conveying pipe. When there is a gap between the inner wall of the stationary component and the outer wall of the conveying pipe, gas flowing out from the connection point between the furnace cylinder and the conveying pipe can enter the gap between the inner wall of the stationary component and the outer wall of the conveying pipe. Since the first flange is in sealed contact with the outer wall of the conveying pipe, the first flange will have a sealing and blocking effect on the gas in the gap between the inner wall of the stationary component and the outer wall of the conveying pipe.

[0021] Specifically, in the axial direction of the conveying pipe, there is a gap between the first end of the fixed assembly and the furnace cylinder. Since the first end of the sealing shell is in sealing contact with the furnace cylinder, and the sealing component is in sealing contact with both the fixed assembly and the sealing shell, the gas flowing from the connection point between the furnace cylinder and the conveying pipe can only flow into the designated space. The sealing component effectively seals and blocks the gas within the designated space. Specifically, in the direction perpendicular to the axial direction of the conveying pipe, the designated space is located between the sealing shell and the conveying pipe. Furthermore, in the axial direction of the conveying pipe, the designated space includes the space between the sealing component and the furnace cylinder, and the space between the first end of the fixed assembly and the furnace cylinder.

[0022] It should be noted that, since the first end of the sealing shell is fixedly connected to the furnace cylinder, the furnace cylinder will drive the sealing shell to rotate around a preset axis. The extension direction of the preset axis is parallel to or the same as the axial direction of the conveying pipeline; that is, the sealing shell rotates relative to the sealing component, and there is a dynamic seal between the sealing component and the sealing shell. Since the second end of the fixing component is fixedly connected to the first flange, and the first flange is fixedly sleeved on the conveying pipeline, the fixing component is fixedly installed, and there is a static seal between the sealing component and the fixing component.

[0023] As can be seen, the sealing structure of this application can effectively seal the connection between the furnace cylinder and the conveying pipeline, preventing gas leakage and solving the problem of poor sealing effect in the existing sealing methods at the connection between the furnace cylinder and the feed or discharge pipeline. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0025] Figure 1 A schematic diagram of the fitting structure of the sealing structure according to the present invention with the conveying pipeline and the furnace cylinder is shown;

[0026] Figure 2 It shows Figure 1 A partially enlarged view of the sealing structure and its connection with the conveying pipeline and furnace cylinder.

[0027] The above figures include the following reference numerals:

[0028] 100. Sealing structure; 10. Sealing component; 11. Packing; 20. Sealing shell; 30. First flange; 40. Baffle; 50. Tightening part; 51. Operating part; 60. Designated space; 70. Rotary support; 71. Second flange; 72. Third flange; 80. Fixing assembly; 81. Shaft sleeve; 82. Connecting pipe; 821. Designated pipe section; 90. Gas pipe connector;

[0029] 200, Furnace cylinder; 210, Conveying pipeline; 220, Fourth flange; 230, Furnace cylinder body. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] This invention provides a sealing structure 100 for use in rotary kiln equipment. Please refer to [reference needed]. Figure 1 and Figure 2The rotary kiln equipment includes a furnace cylinder 200 and a conveying pipe 210. The first end of the conveying pipe 210 extends into the furnace cylinder 200, so that the port of the first end of the conveying pipe 210 is connected to the cavity of the furnace cylinder 200. The port of the second end of the conveying pipe 210 serves as either a feed inlet or a discharge outlet. When the port of the second end of the conveying pipe 210 is the feed inlet, material entering the conveying pipe 210 through the port of the second end of the conveying pipe 210 enters the furnace cylinder 200 after being conveyed by the conveying pipe 210. When the port of the second end of the conveying pipe 210 is the discharge outlet, material in the furnace cylinder 200 is discharged through the conveying pipe 210. The conveying pipe 210 is fixedly installed, while the furnace cylinder 200 is rotatably installed; therefore, the furnace cylinder 200 can rotate relative to the conveying pipe 210. Because the furnace cylinder 200 can rotate relative to the conveying pipe 210, gas leakage may occur at the connection point between the furnace cylinder 200 and the conveying pipe 210. Optionally, the gas flowing out from the connection point between the furnace cylinder 200 and the conveying pipe 210 is non-condensable gas.

[0034] The sealing structure 100 includes a fixing component 80, a first flange 30, a sealing shell 20, and a sealing element 10. The fixing component 80 is sleeved on the conveying pipe 210, and the inner wall of the fixing component 80 is in contact with or has a gap with the outer peripheral wall of the conveying pipe 210. Along the axial direction of the conveying pipe 210, the fixing component 80 has a first end and a second end that are arranged opposite to each other, and the second end of the fixing component 80 is located on the side of its first end away from the furnace cylinder 200. The first flange 30 is fixedly sleeved on the conveying pipe 210 and is in sealing contact with the outer peripheral wall of the conveying pipe 210, that is, the inner wall surface of the first flange 30 is in sealing contact with the outer peripheral wall of the conveying pipe 210. The second end of the fixing component 80 is fixedly connected to the first flange 30.

[0035] The sealing shell 20 is sleeved on the outside of the fixing component 80. The sealing shell 20 and the fixing component 80 are spaced apart in a direction perpendicular to the axial direction of the conveying pipe 210 to form a sealing space between the sealing shell 20 and the fixing component 80. Along the axial direction of the conveying pipe 210, the sealing shell 20 has two opposite ends. The end of the sealing shell 20 near the furnace cylinder 200 is fixedly connected to the furnace cylinder 200 and in sealing contact. The sealing component 10 is disposed in the sealing space. The sealing component 10 is in sealing contact with the fixing component 80 and also in sealing contact with the sealing shell 20. That is, the inner wall surface of the sealing component 10 is in sealing contact with the fixing component 80, and the outer peripheral wall of the sealing component 10 is in sealing contact with the sealing shell 20.

[0036] When the inner wall of the fixed assembly 80 is completely fitted with the outer peripheral wall of the conveying pipe 210, the gas flowing out from the connection point between the furnace cylinder 200 and the conveying pipe 210 cannot enter the space between the inner wall of the fixed assembly 80 and the outer peripheral wall of the conveying pipe 210. When there is a gap between the inner wall of the fixed assembly 80 and the outer peripheral wall of the conveying pipe 210, the gas flowing out from the connection point between the furnace cylinder 200 and the conveying pipe 210 can enter the gap between the inner wall of the fixed assembly 80 and the outer peripheral wall of the conveying pipe 210. Since the first flange 30 is in sealed contact with the outer peripheral wall of the conveying pipe 210, the first flange 30 will have a sealing and blocking effect on the gas in the gap between the inner wall of the fixed assembly 80 and the outer peripheral wall of the conveying pipe 210.

[0037] Specifically, the two ends of the sealing shell 20 are a first end and a second end, respectively; that is, along the axial direction of the conveying pipe 210, the sealing shell 20 has a first end and a second end that are arranged opposite to each other, and the first end of the sealing shell 20 is located on the side of its second end closer to the furnace cylinder 200; the first end of the sealing shell 20 is fixedly connected to the furnace cylinder 200 and in sealed contact.

[0038] Specifically, in the axial direction of the conveying pipe 210, there is a gap between the first end of the fixing component 80 and the furnace cylinder 200. Since the first end of the sealing shell 20 is in sealing contact with the furnace cylinder 200, and the sealing component 10 is in sealing contact with both the fixing component 80 and the sealing shell 20, the gas flowing out from the connection point between the furnace cylinder 200 and the conveying pipe 210 can only flow into the designated space 60. The sealing component 10 will have the effect of sealing and blocking the gas in the designated space 60. In the direction perpendicular to the axial direction of the conveying pipe 210, the designated space 60 is located between the sealing shell 20 and the conveying pipe 210. In the axial direction of the conveying pipe 210, the designated space 60 includes the space between the sealing component 10 and the furnace cylinder 200 and the space between the first end of the fixing component 80 and the furnace cylinder 200.

[0039] It should be noted that, since the first end of the sealing shell 20 is fixedly connected to the furnace cylinder 200, the furnace cylinder 200 will drive the sealing shell 20 to rotate around a preset axis. The extension direction of the preset axis is parallel to or the same as the axial direction of the conveying pipe 210; that is, the sealing shell 20 rotates relative to the sealing component 10, and there is a dynamic seal between the sealing component 10 and the sealing shell 20. Since the second end of the fixing component 80 is fixedly connected to the first flange 30, and the first flange 30 is fixedly sleeved on the conveying pipe 210, the fixing component 80 is fixedly installed, and there is a static seal between the sealing component 10 and the fixing component 80.

[0040] As can be seen, the sealing structure 100 of this application can effectively seal the connection between the furnace cylinder 200 and the conveying pipe 210, preventing gas leakage and solving the problem of poor sealing effect in the existing sealing methods at the connection between the furnace cylinder and the feed pipe or discharge pipe.

[0041] Furthermore, due to the poor sealing effect at the connection between the furnace cylinder and the feed or discharge pipe in the existing technology, there is a problem of condensed oil and gas leakage at the connection between the furnace cylinder and the feed or discharge pipe. The condensed oil and gas leaking from the connection between the furnace cylinder and the feed or discharge pipe causes dripping due to gravity. The sealing structure 100 of this application can effectively seal the connection between the furnace cylinder 200 and the conveying pipe 210, thus avoiding the problem of condensed oil and gas leakage at the connection between the furnace cylinder 200 and the conveying pipe 210, and thus avoiding the problem of dripping condensed oil and gas.

[0042] Specifically, the first flange 30 is welded to the conveying pipe 210.

[0043] Specifically, the sealing component 10 has a ring-shaped structure and is sleeved on the fixing component 80.

[0044] In this embodiment, along the axial direction of the conveying pipe 210, the sealing member 10 has a first end and a second end disposed opposite to each other, with the first end of the sealing member 10 located on the side of its second end closer to the furnace cylinder 200; the sealing structure 100 further includes a baffle 40 and a tightening portion 50, the baffle 40 abutting against the first end of the sealing member 10, and the tightening portion 50 abutting against the second end of the sealing member 10, so that the baffle 40 and the tightening portion 50 limit the sealing member 10 in the axial direction of the conveying pipe 210 and generate an axial pressing force on the sealing member 10 in the axial direction of the conveying pipe 210; wherein, at least a portion of the sealing member 10 is made of a flexible material so that when the sealing member 10 is subjected to an axial pressing force, the sealing member 10 deforms, so that the sealing member 10 expands in a direction perpendicular to the axial direction of the conveying pipe 210, thereby making the sealing member 10 in sealing contact with the fixing assembly 80 and in sealing contact with the sealing shell 20.

[0045] Specifically, the baffle 40 is fixedly connected to the fixing assembly 80, the tightening part 50 is located in the sealed space, and the tightening part 50 is adjustable along the axial position of the conveying pipe 210 to adjust the axial clamping force of the tightening part 50 on the sealing component 10.

[0046] Specifically, the baffle 40 is located on the side of the fixing assembly 80 near the furnace cylinder 200 and is fixedly connected to the first end of the fixing assembly 80; at this time, there is a gap between the baffle 40 and the furnace cylinder 200 in the axial direction of the conveying pipe 210. Optionally, the baffle 40 is in sealed contact with the first end of the fixing assembly 80.

[0047] Specifically, the clamping part 50 is adjustablely positioned on the fixing assembly 80 along the axial direction of the conveying pipe 210, and an operating part 51 is connected to the clamping part 50 to adjust the axial position of the clamping part 50 along the conveying pipe 210 by operating the operating part 51. Optionally, the operating part 51 is a rod-shaped structure.

[0048] Specifically, the sealing component 10 includes one or more packing rings 11; when the sealing component 10 includes multiple packing rings 11, the multiple packing rings 11 are arranged sequentially along the axial direction of the conveying pipe 210, and adjacent two packing rings 11 are tightly fitted along the axial direction of the conveying pipe 210. The packing rings 11 have a ring-shaped structure and are sleeved on the fixing component 80.

[0049] Optionally, packing 11 is graphite packing.

[0050] Optionally, the packing 11 is a strip-shaped structure formed by the ends of the packing 11 abutting each other, so that the packing 11 is fitted onto the fixing component 80 through the abutting points of the ends of the packing 11. When the sealing component 10 includes multiple packings 11, the central axes of the multiple packings 11 coincide, and the straight line where any two packings 11 abutting positions are located is not parallel to the central axis of the packing 11, so that the abutting positions of the multiple packings 11 are staggered.

[0051] In this embodiment, the sealing structure 100 further includes a rotary support 70, which includes an inner ring and an outer ring located outside the inner ring. The outer ring and inner ring of the rotary support 70 are coaxial and can be rotatably arranged relative to each other. The sealing shell 20 is connected to the outer ring of the rotary support 70, and the fixing component 80 is connected to the inner ring of the rotary support 70, so that the sealing shell 20 can rotate relative to the fixing component 80. Furthermore, along the axial direction of the conveying pipe 210, the sealing component 10 has a plurality of sealing parts arranged sequentially. By providing the rotary support 70, it is also beneficial to ensure the uniformity of the pressing force of the sealing shell 20 on the plurality of sealing parts of the sealing component 10, that is, to ensure that the sealing component 10 is not subjected to bias pressure, thereby ensuring the sealing effect of the sealing component 10.

[0052] Specifically, the slewing bearing 70 also includes rolling elements disposed between its outer and inner rings. The inner and outer rings are connected by the rolling elements to ensure the radial and axial positional accuracy between the inner and outer rings, thereby ensuring the uniformity of force transmission between the inner and outer rings in the radial and axial directions. Optionally, the rolling elements are balls or rollers.

[0053] Optionally, the slewing support 70 is a bearing.

[0054] Specifically, the sealing structure 100 also includes a second flange 71, which is fixedly connected to the sealing shell 20 and to the outer ring of the slewing support 70, so that the sealing shell 20 is fixedly connected to the outer ring of the slewing support 70 through the second flange 71.

[0055] Specifically, the sealing structure 100 also includes a third flange 72, which is detachably connected to the inner ring of the slewing support 70 and detachably connected to the fixing assembly 80. When the third flange 72 is connected to the inner ring of the slewing support 70 and to the fixing assembly 80, the inner ring of the slewing support 70 is connected to and relatively fixed to the fixing assembly 80 through the third flange 72.

[0056] Optionally, the fixing component 80 has a first connecting hole, and the third flange 72 has a second connecting hole. The third flange 72 is fixed relative to the fixing component 80 by passing a first fastener through the first and second connecting holes. Further, the first connecting hole is a threaded hole, allowing for a threaded connection between the fastener and the fixing component 80. Specifically, the first fastener is a bolt.

[0057] Optionally, a third connecting hole is provided on the inner ring of the slewing bearing 70, and a fourth connecting hole is provided on the third flange 72. A second fastener is inserted into the third and fourth connecting holes to fix the third flange 72 relative to the inner ring of the slewing bearing 70. Specifically, the second fastener is a bolt.

[0058] In this embodiment, the fixing component 80 includes a shaft cylinder 81 and a connecting pipe 82. Both the shaft cylinder 81 and the connecting pipe 82 are sleeved on the conveying pipe 210. The inner wall surface of the shaft cylinder 81 is in contact with or has a gap with the outer peripheral wall of the conveying pipe 210, and the inner wall surface of the connecting pipe 82 is in contact with or has a gap with the outer peripheral wall of the conveying pipe 210. The axial direction of the shaft cylinder 81 and the axial direction of the connecting pipe 82 are parallel or the same as the axial direction of the conveying pipe 210. The shaft cylinder 81 has a first end and a second end arranged opposite to each other along its axial direction, and the connecting pipe 82 has a first end and a second end arranged opposite to each other along its axial direction. The first end of the shaft cylinder 81 is located on the side of its second end closer to the furnace cylinder 200. The first end of the connecting pipe 82 is fixedly connected to and in sealed contact with the second end of the shaft cylinder 81. The second end of the connecting pipe 82 is fixedly connected to the first flange 30. That is, the first end of the shaft cylinder 81 is the first end of the fixing component 80, and the second end of the connecting pipe 82 is the second end of the fixing component 80. A sealing shell 20 is fitted onto the outside of the shaft cylinder 81. The sealing shell 20 and the shaft cylinder 81 are spaced apart in a direction perpendicular to the axial direction of the conveying pipe 210 to form a sealing space between them. The sealing component 10 is in sealing contact with the inner wall of the shaft cylinder 81. At least a portion of the connecting pipe 82 is a corrugated section to achieve a flexible connection between the furnace cylinder 200 and the conveying pipe 210. Since the corrugated section is scalable along the axial direction of the conveying pipe 210, it can compensate for axial position fluctuations or twists of the furnace cylinder 200 relative to the conveying pipe 210, thereby ensuring the normal operation of the rotary kiln equipment.

[0059] When the inner wall of the shaft cylinder 81 and the outer peripheral wall of the conveying pipe 210 are completely fitted together, the gas flowing out from the connection point between the furnace cylinder 200 and the conveying pipe 210 cannot enter the space between the inner wall of the shaft cylinder 81 and the outer peripheral wall of the conveying pipe 210. When there is a gap between the inner wall of the shaft cylinder 81 and the outer peripheral wall of the conveying pipe 210, and when the inner wall of the connecting pipe 82 and the outer peripheral wall of the conveying pipe 210 are completely fitted together, the gas flowing out from the connection point between the furnace cylinder 200 and the conveying pipe 210 can enter the space between the inner wall of the shaft cylinder 81 and the outer peripheral wall of the conveying pipe 210, but the gas flowing out from the gap between the inner wall of the shaft cylinder 81 and the outer peripheral wall of the conveying pipe 210 cannot enter the space between the inner wall of the connecting pipe 82 and the outer peripheral wall of the conveying pipe 210. When there is a gap between the inner wall of the shaft cylinder 81 and the outer peripheral wall of the conveying pipe 210, and when there is a gap between the inner wall of the connecting pipe 82 and the outer peripheral wall of the conveying pipe 210, the gas flowing out from the connection position of the furnace cylinder 200 and the conveying pipe 210 flows through the gap between the inner wall of the shaft cylinder 81 and the outer peripheral wall of the conveying pipe 210, and enters the gap between the inner wall of the connecting pipe 82 and the outer peripheral wall of the conveying pipe 210. At this time, the first flange 30 will have the effect of sealing and blocking the gas in the gap between the inner wall of the connecting pipe 82 and the outer peripheral wall of the conveying pipe 210.

[0060] Specifically, the baffle 40 is fixedly connected to the shaft cylinder 81; that is, the baffle 40 is located on the side of the shaft cylinder 81 near the furnace cylinder 200 and is fixedly connected to the first end of the shaft cylinder 81. Optionally, the baffle 40 is in sealed contact with the first end of the shaft cylinder 81.

[0061] Specifically, the clamping part 50 is adjustablely positioned on the shaft cylinder 81 along the axial direction of the conveying pipe 210.

[0062] Specifically, the inner ring of the slewing support 70 is connected to the shaft cylinder 81; that is, the shaft cylinder 81 is detachably connected to the third flange 72; when the third flange 72 is connected to the inner ring of the slewing support 70 and connected to the shaft cylinder 81, the inner ring of the slewing support 70 is connected to and relatively fixed to the shaft cylinder 81 through the third flange 72.

[0063] Optionally, a first connecting hole is formed on the shaft cylinder 81, and a first fastener is inserted into the first connecting hole and the second connecting hole to fix the third flange 72 relative to the shaft cylinder 81. Further, the first connecting hole is a threaded hole to allow a threaded connection between the fastener and the shaft cylinder 81.

[0064] Specifically, the sealing component 10 is sleeved on the shaft sleeve 81, that is, the packing 11 is sleeved on the shaft sleeve 81.

[0065] Specifically, the connecting pipe 82 includes a plurality of designated pipe sections 821 spaced apart along its axial direction, each of which is a corrugated pipe section.

[0066] In this embodiment, a gas channel is provided on the fixing component 80. The first end of the gas channel is used to introduce inert gas. The space between the first end of the fixing component 80 and the furnace cylinder 200 is connected to the second end of the gas channel, so that inert gas is supplied to the space between the first end of the fixing component 80 and the furnace cylinder 200 through the gas channel, forming an inert gas protection, thereby playing an auxiliary sealing role and further enhancing the sealing effect. In addition, the inert gas entering the space between the first end of the fixing component 80 and the furnace cylinder 200 can also cool the sealing component 10, thus extending the service life of the sealing component 10.

[0067] Specifically, the gas passage is set on the shaft cylinder 81, and the space between the first end of the shaft cylinder 81 and the furnace cylinder 200 is connected to the second end of the gas passage.

[0068] Optionally, the second end of the gas passage extends through the baffle 40 so that the space between the baffle 40 and the furnace cylinder 200 is connected to the second end of the gas passage.

[0069] Specifically, the first end of the gas passage is used to communicate with the tracheal connector 90; optionally, the tracheal connector 90 is inserted into the gas passage from the first end of the gas passage. Optionally, the inner wall of the gas passage is provided with internal threads for threaded connection with the tracheal connector 90.

[0070] In this embodiment, the furnace cylinder 200 includes a furnace cylinder body 230 and a fourth flange 220 disposed on the furnace cylinder body 230. The first end of the conveying pipe 210 passes through the fourth flange 220 and extends into the furnace cylinder body 230. In the axial direction of the conveying pipe 210, the fourth flange 220 is in sealing contact with the furnace cylinder body 230. The gas flowing out from the connection position of the furnace cylinder 200 and the conveying pipe 210 first passes through the gap at the connection position of the fourth flange 220 and the conveying pipe 210, and then flows to the space 60 between the inner wall of the fixed component 80 and the outer peripheral wall of the conveying pipe 210.

[0071] Specifically, in the axial direction of the delivery conduit 210, the designated space 60 includes the space between the sealing member 10 and the fourth flange 220 and the space between the first end of the fixing assembly 80 and the fourth flange 220.

[0072] Specifically, the first end of the sealing shell 20 is fixedly connected to and in sealing contact with the fourth flange 220.

[0073] Specifically, the space between the first end of the fixing component 80 and the fourth flange 220 is connected to the second end of the gas passage.

[0074] Optionally, the second end of the gas passage extends through the baffle 40 so that the space between the baffle 40 and the fourth flange 220 communicates with the second end of the gas passage.

[0075] In this embodiment, along the axial direction of the conveying pipe 210, the third flange 72 is located on the side of the tightening part 50 away from the sealing member 10; the third flange 72 is provided with a clearance through hole for the operating part 51 to pass through, and the operating part 51 is movably inserted into the clearance through hole along the axial direction of the conveying pipe 210, so that the operating part 51 can drive the tightening part 50 to tighten the sealing member 10 or drive the tightening part 50 away from the sealing member 10.

[0076] When replacing the sealing component 10, since the third flange 72 is detachably connected to the inner ring of the slewing support 70 and detachably connected to the fixing assembly 80, the third flange 72 can be detached from the inner ring of the slewing support 70 and the third flange 72 can be detached from the fixing assembly 80. After the third flange 72 is detached, the tightening part 50 can be removed, and then the sealing component 10 can be removed. It is evident that the sealing structure 100 of this application improves the ease of operation when replacing the sealing component 10.

[0077] The present invention also provides a rotary kiln device, which includes a furnace cylinder 200, a conveying pipe 210 and the aforementioned sealing structure 100.

[0078] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0079] In the sealing structure 100 provided by the present invention, the sealing structure 100 includes a fixing component 80, a first flange 30, a sealing shell 20, and a sealing component 10. The fixing component 80 is sleeved on the conveying pipe 210, and the inner wall of the fixing component 80 is in contact with or has a gap with the outer peripheral wall of the conveying pipe 210. Along the axial direction of the conveying pipe 210, the fixing component 80 has a first end and a second end that are arranged opposite to each other, and the second end of the fixing component 80 is located on the side of its first end away from the furnace cylinder 200. The first flange 30 is fixedly sleeved on the conveying pipe 210 and is in sealing contact with the outer peripheral wall of the conveying pipe 210, that is, the inner wall surface of the first flange 30 is in sealing contact with the outer peripheral wall of the conveying pipe 210. The second end of the fixing component 80 is fixedly connected to the first flange 30.

[0080] The sealing shell 20 is sleeved on the outside of the fixing component 80. The sealing shell 20 and the fixing component 80 are spaced apart in a direction perpendicular to the axial direction of the conveying pipe 210 to form a sealing space between the sealing shell 20 and the fixing component 80. Along the axial direction of the conveying pipe 210, the sealing shell 20 has a first end and a second end that are arranged opposite to each other. The first end of the sealing shell 20 is located on the side of its second end closer to the furnace cylinder 200. The first end of the sealing shell 20 is fixedly connected to the furnace cylinder 200 and in sealing contact. The sealing component 10 is disposed in the sealing space. The sealing component 10 is in sealing contact with the fixing component 80 and also in sealing contact with the sealing shell 20. That is, the inner wall surface of the sealing component 10 is in sealing contact with the fixing component 80, and the outer peripheral wall of the sealing component 10 is in sealing contact with the sealing shell 20.

[0081] When the inner wall of the fixed assembly 80 is completely fitted with the outer peripheral wall of the conveying pipe 210, the gas flowing out from the connection point between the furnace cylinder 200 and the conveying pipe 210 cannot enter the space between the inner wall of the fixed assembly 80 and the outer peripheral wall of the conveying pipe 210. When there is a gap between the inner wall of the fixed assembly 80 and the outer peripheral wall of the conveying pipe 210, the gas flowing out from the connection point between the furnace cylinder 200 and the conveying pipe 210 can enter the gap between the inner wall of the fixed assembly 80 and the outer peripheral wall of the conveying pipe 210. Since the first flange 30 is in sealed contact with the outer peripheral wall of the conveying pipe 210, the first flange 30 will have a sealing and blocking effect on the gas in the gap between the inner wall of the fixed assembly 80 and the outer peripheral wall of the conveying pipe 210.

[0082] Specifically, in the axial direction of the conveying pipe 210, there is a gap between the first end of the fixing component 80 and the furnace cylinder 200. Since the first end of the sealing shell 20 is in sealing contact with the furnace cylinder 200, and the sealing component 10 is in sealing contact with both the fixing component 80 and the sealing shell 20, the gas flowing out from the connection point between the furnace cylinder 200 and the conveying pipe 210 can only flow into the designated space 60. The sealing component 10 will have the effect of sealing and blocking the gas in the designated space 60. In the direction perpendicular to the axial direction of the conveying pipe 210, the designated space 60 is located between the sealing shell 20 and the conveying pipe 210. In the axial direction of the conveying pipe 210, the designated space 60 includes the space between the sealing component 10 and the furnace cylinder 200 and the space between the first end of the fixing component 80 and the furnace cylinder 200.

[0083] It should be noted that, since the first end of the sealing shell 20 is fixedly connected to the furnace cylinder 200, the furnace cylinder 200 will drive the sealing shell 20 to rotate around a preset axis. The extension direction of the preset axis is parallel to or the same as the axial direction of the conveying pipe 210; that is, the sealing shell 20 rotates relative to the sealing component 10, and there is a dynamic seal between the sealing component 10 and the sealing shell 20. Since the second end of the fixing component 80 is fixedly connected to the first flange 30, and the first flange 30 is fixedly sleeved on the conveying pipe 210, the fixing component 80 is fixedly installed, and there is a static seal between the sealing component 10 and the fixing component 80.

[0084] As can be seen, the sealing structure 100 of this application can effectively seal the connection between the furnace cylinder 200 and the conveying pipe 210, preventing gas leakage and solving the problem of poor sealing effect in the existing sealing methods at the connection between the furnace cylinder and the feed pipe or discharge pipe.

[0085] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0086] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0087] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sealing structure applied in a rotary kiln, the rotary kiln comprising a furnace cylinder (200) and a conveying pipe (210), the first end of the conveying pipe (210) extending into the furnace cylinder (200), the conveying pipe (210) being fixedly disposed, and the furnace cylinder (200) being rotatably disposed; characterized in that, The sealing structure includes: A fixing component (80) is sleeved on the conveying pipe (210), the inner wall of the fixing component (80) is fitted with or has a gap with the outer peripheral wall of the conveying pipe (210); along the axial direction of the conveying pipe (210), the fixing component (80) has a first end and a second end arranged opposite to each other, the second end of the fixing component (80) is located on the side of its first end away from the furnace cylinder (200); The first flange (30) is fixedly sleeved on the conveying pipe (210) and in sealing contact with the outer peripheral wall of the conveying pipe (210); the second end of the fixing assembly (80) is fixedly connected to the first flange (30); A sealing shell (20) is sleeved on the outside of the fixing component (80) to form a sealed space between the sealing shell (20) and the fixing component (80); along the axial direction of the conveying pipe (210), the sealing shell (20) has two oppositely arranged ends, and one end of the sealing shell (20) near the furnace cylinder (200) is fixedly connected to and in sealed contact with the furnace cylinder (200); A sealing component (10) is disposed within the sealing space, and the sealing component (10) is in sealing contact with the fixing component (80) and in sealing contact with the sealing shell (20); The fixing component (80) has a gas channel. The first end of the gas channel is used to introduce inert gas. The space between the first end of the fixing component (80) and the furnace cylinder (200) is connected to the second end of the gas channel. The gas channel is used to enhance the sealing effect and cool down the sealing component (10).

2. The sealing structure according to claim 1, characterized in that, Along the axial direction of the conveying pipe (210), the sealing member (10) has a first end and a second end disposed opposite to each other; the sealing structure further includes: A baffle (40) and a clamping part (50) are provided, wherein the baffle (40) abuts against the first end of the sealing member (10) and the clamping part (50) abuts against the second end of the sealing member (10) to limit the sealing member (10) in the axial direction of the conveying pipe (210) and generate an axial clamping force on the sealing member (10); At least a portion of the sealing member (10) is made of a flexible material so that when the sealing member (10) is subjected to axial compressive force, the sealing member (10) deforms to expand in a direction perpendicular to the axial direction of the delivery pipe (210).

3. The sealing structure according to claim 2, characterized in that, The baffle (40) is fixedly connected to the fixing component (80), and the tightening part (50) is adjustable along the axial position of the conveying pipe (210).

4. The sealing structure according to claim 1 or 2, characterized in that, The sealing component (10) includes one or a plurality of packings (11) arranged sequentially along the axial direction of the delivery pipe (210).

5. The sealing structure according to claim 1, characterized in that, The sealing structure further includes a rotary support (70), which includes an inner ring and an outer ring located outside the inner ring, and the outer ring and the inner ring are rotatably arranged relative to each other; the sealing shell (20) is connected to the outer ring of the rotary support (70), and the fixing component (80) is connected to the inner ring of the rotary support (70).

6. The sealing structure according to claim 5, characterized in that, The sealing structure further includes: The second flange (71) is fixedly connected to the sealing shell (20) and to the outer ring of the slewing support (70); and / or The third flange (72) is detachably connected to the inner ring of the slewing support (70) and detachably connected to the fixing component (80); when the third flange (72) is connected to the inner ring of the slewing support (70) and connected to the fixing component (80), the inner ring of the slewing support (70) is connected to and relatively fixed to the fixing component (80) through the third flange (72).

7. The sealing structure according to claim 1, characterized in that, A shaft sleeve (81) is sleeved on the conveying pipe (210), and a sealing shell (20) is sleeved on the outside of the shaft sleeve (81) to form a sealing space between the sealing shell (20) and the shaft sleeve (81); the sealing component (10) is in sealing contact with the shaft sleeve (81). A connecting pipe (82) is sleeved on the conveying pipe (210). The first end of the connecting pipe (82) is fixedly connected to the second end of the shaft cylinder (81) and in sealed contact. The second end of the connecting pipe (82) is fixedly connected to the first flange (30). At least a portion of the connecting pipe (82) is a corrugated pipe section.

8. The sealing structure according to claim 7, characterized in that, The connecting pipe (82) includes a plurality of designated pipe sections (821) spaced apart along its axial direction, each of the designated pipe sections (821) being a corrugated pipe section.

9. A rotary kiln device, comprising a furnace cylinder (200) and a conveying pipe (210), characterized in that, The rotary kiln equipment further includes the sealing structure as described in any one of claims 1 to 8.

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