Sealing device and rotary kiln

Abstract

The application provides a sealing device and a rotary kiln. The sealing device comprises a packing seal assembly, the packing seal assembly is used for sleeving a rotary support end of the rotary kiln, the packing seal assembly is further used for being fixedly connected with a sealing cover of the rotary kiln, the sealing device further comprises an oil seal assembly, a first sealing structure and a second sealing structure, the oil seal assembly is used for sleeving the rotary support end, the oil seal assembly is fixedly connected to one side of the packing seal assembly away from the sealing cover, and a storage cavity is formed between the oil seal assembly and the packing seal assembly; the first sealing structure is elastically abutted with the oil seal assembly and the packing seal assembly respectively, and the first sealing structure is further used for being elastically abutted with the rotary support end; the second sealing structure is elastically abutted with the oil seal assembly and the packing seal assembly respectively, and the storage cavity is located between the first sealing structure and the second sealing structure. In this way, the problems of powder leakage and air leakage are avoided, and the problem of external gas impurities entering the furnace is avoided.

Description

Technical Field

[0001] This article relates to the technical field of rotary kilns, and in particular to a sealing device and a rotary kiln. Background Technology

[0002] In the production process of lithium battery cathode materials, the washed materials need to be dried to remove moisture. Currently, double cone dryers are commonly used in cathode material production, but they cannot achieve continuous drying, affecting production efficiency. Rotary kilns are a commonly used industrial chemical equipment for continuous drying of materials. When processing materials under specific atmospheres or operating under pressure, their sealing requirements are very high.

[0003] In related technologies, rotary kilns are mostly sealed at the kiln head or kiln tail using packing seals or a combination of packing seals and labyrinth seals to prevent dust and gas leakage from inside the kiln.

[0004] However, due to errors in manufacturing and installation, as well as variations in kiln temperature, rotary kilns can experience axial movement and radial runout during rotation. This can lead to swaying and misalignment, resulting in poor sealing, powder and gas leakage, and the entry of external gaseous impurities into the furnace, affecting the furnace atmosphere. Summary of the Invention

[0005] Therefore, it is necessary to provide a sealing device and rotary kiln with better sealing performance.

[0006] A sealing device includes a packing seal assembly for fitting onto the rotary support end of a rotary kiln, the packing seal assembly also for fixed connection to a sealing cover of the rotary kiln, and the sealing device further includes:

[0007] An oil seal assembly is used to be sleeved on the rotary support end, and the oil seal assembly is fixedly connected to the side of the packing seal assembly away from the sealing cover, and a storage cavity is formed between the oil seal assembly and the packing seal assembly;

[0008] A first sealing structure elastically abuts against the oil seal assembly and the packing seal assembly, and the first sealing structure is also used to elastically abut against the slewing bearing end; and

[0009] The second sealing structure elastically abuts against the oil seal assembly and the packing seal assembly respectively, and the storage cavity is located between the first sealing structure and the second sealing structure.

[0010] In one embodiment, the first sealing structure includes a packing gland, which elastically abuts against the oil seal assembly and the packing seal assembly, respectively. The packing gland is also used to elastically abut against the outer surface of the slewing support end, and the storage cavity is located outside the packing gland.

[0011] In one embodiment, the oil seal assembly has a receiving groove on the side adjacent to the packing seal assembly, the receiving groove extending to the inner side of the oil seal assembly, and the packing is received in the receiving groove and elastically abuts against the oil seal assembly.

[0012] In one embodiment, the first sealing structure further includes a sealing ring, which elastically abuts against the packing sealing assembly and the oil seal assembly, respectively, and the storage cavity is located between the sealing ring and the second sealing structure.

[0013] In one embodiment, the second sealing structure is a sealing gasket.

[0014] In one embodiment, the packing seal assembly has a first storage trough on the side adjacent to the oil seal assembly, and the oil seal assembly has a second storage trough on the side adjacent to the packing seal assembly. The first storage trough and the second storage trough are arranged opposite to each other and together form a storage cavity.

[0015] In one embodiment, the packing seal assembly includes:

[0016] A stuffing box is used to fit onto the slewing support end and to be fixedly connected to the sealing cover. The stuffing box is used to form an annular receiving cavity between itself and the slewing support end.

[0017] Elastic filler is used to fill the annular cavity;

[0018] A gland is fixedly connected to the stuffing box, a portion of which is located within the annular receiving cavity and elastically abuts against the elastic packing. The gland and the oil seal assembly form the storage cavity.

[0019] In one embodiment, the packing seal assembly further includes an adjusting ring for fitting onto the rotary support end. The adjusting ring is located within the annular receiving cavity, and the gland elastically abuts against the elastic packing through the adjusting ring.

[0020] In one embodiment, the sealing device further includes an air seal assembly, which is fixedly connected to the packing seal assembly, and the air outlet of the air seal assembly is connected to the annular receiving cavity.

[0021] In one embodiment, the gas seal assembly includes:

[0022] A partition ring is used to be fitted onto the slewing support end. The partition ring is located inside the annular receiving cavity. The opposite sides of the partition ring elastically abut against the elastic packing. The partition ring has an annular air-sealing channel, which is arranged opposite to the outer surface of the slewing support end.

[0023] An air inlet is fixedly connected to the stuffing box, which has a clearance hole. The air outlet of the air inlet, the clearance hole, and the annular air seal channel are connected in sequence.

[0024] In one embodiment, the air intake component includes a cover and an air intake pipe. The cover is fixedly connected to the stuffing box and covers the clearance hole. The air intake pipe is fixedly connected to the cover, and the air intake pipe, the cover, the clearance hole, and the annular air seal channel are sequentially connected.

[0025] In one embodiment, the partition ring includes a first abutting portion, a second abutting portion, and a connecting portion, all located in the annular receiving cavity. The connecting portion is located between the first abutting portion and the second abutting portion, and is fixedly connected to the first abutting portion and the second abutting portion respectively. The annular air seal channel is opened in the connecting portion, and the first abutting portion and the second abutting portion elastically abut against the elastic packing respectively.

[0026] In one embodiment, the oil seal assembly includes:

[0027] A sealing ring is used to fit onto the rotary support end. The sealing ring is fixedly connected to the packing seal assembly. An oil seal groove is provided on the inner side of the sealing ring.

[0028] The blocking component includes a first connecting ring and a sealing protrusion structure. The first connecting ring is used to be sleeved on the rotary support end. There is a gap between the side of the first connecting ring adjacent to the packing seal assembly and the sealing ring. At least two sealing protrusion structures are fixedly connected to the outside of the first connecting ring. At least two sealing protrusion structures are spaced apart along the axial direction of the first connecting ring. Each sealing protrusion structure is located in the oil seal groove and elastically abuts against the sealing ring.

[0029] In one embodiment, each of the sealing protrusion structures is an annular structure, and each of the sealing protrusion structures has a first sealing part and a second sealing part. The first sealing part and the second sealing part are both annular structures and are arranged to surround the rotary support end. An angle is formed between the first sealing part and the second sealing part. The first sealing part and the second sealing part are both located in the oil seal groove and elastically abut against the inner wall of the oil seal groove, so that the first sealing part and the second sealing part are used for sealing.

[0030] In one embodiment, the blocking member further includes a second connecting ring, which is used to be sleeved on the rotary support end. The second connecting ring is fixedly connected to the first connecting ring and is located on the side of the sealing ring opposite to the packing seal assembly.

[0031] The oil seal assembly also includes a clamp, which is snapped onto the outer side of the second connecting ring so that the blocking member is fixedly sleeved with the slewing support end.

[0032] In one embodiment, a snap-fit ​​groove is provided on the outer side of the second connecting ring, and part of the clamp is snapped into the snap-fit ​​groove.

[0033] In one embodiment, the blocking member further includes a shaping member, and the first connecting ring and the second connecting ring are covered and connected to the shaping member.

[0034] In one embodiment, each of the sealing protrusion structures, the first connecting ring, and the second connecting ring is an integrally formed structure.

[0035] A rotary kiln includes a furnace body, a sealing cover, and a sealing device as described in any of the above embodiments. The furnace body has a rotary support end, the packing sealing assembly is sleeved on the rotary support end, the packing sealing assembly is also fixedly connected to the sealing cover, and the oil seal assembly is sleeved on the rotary support end.

[0036] The above-mentioned one or more technical solutions have at least the following advantages:

[0037] During the operation of the rotary kiln, the packing seal assembly seals the rotary support end of the kiln body, thus blocking the flow of dust and gas. When the seal of the packing seal assembly fails, the first sealing structure seals the rotary support end. When the seal between the first sealing structure and the packing seal assembly fails, the storage chamber temporarily stores dust and gas. At this time, the second sealing structure also prevents dust and gas leakage and prevents external impurities from entering the storage chamber. When the seal between the first sealing structure and the oil seal assembly fails, the oil seal assembly prevents dust and gas leakage. In this way, the packing seal assembly, the first sealing structure, the storage chamber, the second sealing structure, and the oil seal assembly work together to prevent dust and gas leakage, improving the sealing effect of the sealing device, avoiding powder and gas leakage, and preventing external gas impurities from entering the storage chamber, thereby preventing external gas impurities from entering the kiln.

[0038] Details of one or more embodiments herein are set forth in the accompanying drawings and description. Other features, objects, and advantages of this document will become apparent from the specification, drawings, and claims. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments in this paper, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this paper and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of a rotary kiln according to one embodiment;

[0041] Figure 2 for Figure 1 The diagram shows an enlarged view of the rotary kiln at point A.

[0042] Figure 3 for Figure 1 The diagram shows an enlarged view of the rotary kiln at point B.

[0043] Figure 4 for Figure 2 The diagram shows an enlarged view of the rotary kiln at point C.

[0044] Figure 5 for Figure 2 The diagram shows an enlarged view of the rotary kiln at point D.

[0045] Reference numerals: 10-rotary kiln; 10a-furnace body; 10b-sealing cover; 100-rotation support end; 10c-sealing device; 200-packing seal assembly; 210-stuffing gland; 211-annular receiving cavity; 212-avoiding hole; 220-elastic packing; 230-pressure cover; 240-adjusting ring; 201-storage cavity; 202-first storage tank; 300-oil seal assembly; 310-sealing ring; 311-oil seal groove; 320-blocking element; 321-first connecting ring; 322-sealing protrusion structure; 3221-first sealing part; 3222-second sealing part; 323-second connecting ring; 3231-clamping groove; 324-shaping element; 330-clamp; 301-receiving groove; 3 02-Second storage tank; 400-First sealing structure; 410-Packing; 420-Sealing ring; 500-Second sealing structure; 600-Air seal assembly; 610-Separating ring; 611-First abutment part; 612-Second abutment part; 613-Connecting part; 6101-Annular air seal channel; 620-Air inlet; 621-Cover; 622-Air inlet pipe; 700-First fastening assembly; 710-First threaded fastener; 720-First nut; 800-Second fastening assembly; 810-Double-ended stud; 820-Second nut; 830-Third nut. Detailed Implementation

[0046] To facilitate understanding of this document, a more complete description will be provided below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, this document can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure herein.

[0047] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the document. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0049] like Figure 1 As shown, a rotary kiln 10 in one embodiment includes a furnace body 10a, a sealing cover 10b, and a sealing device 10c. The furnace body 10a has a rotary support end 100.

[0050] like Figure 1 and Figure 2As shown, in one embodiment, the sealing device 10c includes a packing seal assembly 200, which is used to be sleeved on the rotary support end 100 of the rotary kiln 10. The packing seal assembly 200 is also used to be fixedly connected to the sealing cover 10b of the rotary kiln 10. The sealing device 10c also includes an oil seal assembly 300, a first sealing structure 400 and a second sealing structure 500. The oil seal assembly 300 is used to be sleeved on the rotary support end 100 and is fixedly connected to the side of the packing seal assembly 200 away from the sealing cover 10b. A storage cavity 201 is formed between the oil seal assembly 300 and the packing seal assembly 200. The first sealing structure 400 elastically abuts against both the oil seal assembly 300 and the packing seal assembly 200, thereby sealing the gap between them. The first sealing structure 400 also elastically abuts against the rotary support end 100, further sealing the gap between them. The second sealing structure 500 elastically abuts against both the oil seal assembly 300 and the packing seal assembly 200, sealing the gap between them. The storage cavity 201 is located between the first sealing structure 400 and the second sealing structure 500, providing sealing structures on both its inner and outer sides.

[0051] like Figure 1 As shown, in this embodiment, when the rotary kiln 10 is working, the rotary support end 100 rotates. During the operation of the rotary kiln 10, dust and gas inside the furnace body 10a will enter the gap between the sealing cover 10b and the rotary support end 100. The packing sealing assembly 200 will prevent dust and gas from entering the gap between the packing sealing assembly 200 and the rotary support end 100. That is, the packing sealing assembly 200 seals the rotary support end 100 of the furnace body 10a to prevent dust leakage. When the seal of the packing sealing assembly 200 fails, a gap is generated between the packing sealing assembly 200 and the rotary support end 100. At this time, the first sealing structure 400 will block the outflow of dust and gas, so that the first sealing structure 400 can play a sealing role.

[0052] like Figure 1As shown, furthermore, when the seal between the first sealing structure 400 and the packing seal assembly 200 fails, dust and gas will enter the storage chamber 201 through the gap between the first sealing structure 400 and the packing seal assembly 200, causing the dust to be temporarily stored in the storage chamber 201, thereby preventing dust leakage from the storage chamber 201. At this time, due to the sealing effect of the second sealing structure 500, dust and gas will not leak out, and external gas impurities will not enter the storage chamber 201. When the storage chamber 201 is full of dust, as the furnace body 10a rotates continuously, a gap will be generated between the first sealing structure 400 and the oil seal assembly 300. At this time, dust and gas will enter the oil seal assembly 300 through the gap, causing the oil seal assembly 300 to block dust and gas leakage. In this way, the packing seal assembly 200, the first sealing structure 400, the storage chamber 201, the second sealing structure 500, and the oil seal assembly 300 jointly prevent dust and gas leakage.

[0053] During the operation of the rotary kiln 10, the aforementioned sealing device 10c seals the rotary support end 100 of the furnace body 10a with the packing sealing assembly 200, i.e., the packing sealing assembly 200 blocks the flow of dust and gas. When the seal of the packing sealing assembly 200 fails, the first sealing structure 400 seals the rotary support end 100. When the seal between the first sealing structure 400 and the packing sealing assembly 200 fails, the storage chamber 201 is used to temporarily store dust and gas. At this time, the second sealing structure 500 is also used to prevent dust and gas from leaking out, while preventing external impurities from entering the storage chamber 201. When the seal between the first sealing structure 400 and the oil seal assembly 300 fails, the oil seal assembly 300 is used to prevent dust and gas from leaking out. In this way, the sealing effect of the sealing device 10c is improved by the joint blocking of dust and gas leakage by the packing sealing assembly 200, the first sealing structure 400, the storage chamber 201, the second sealing structure 500 and the oil seal assembly 300, thus avoiding the problem of powder leakage and gas leakage. At the same time, it also avoids the problem of external gas impurities entering the storage chamber 201, thereby preventing the problem of external gas impurities entering the furnace.

[0054] like Figure 3 As shown, in one embodiment, the first sealing structure 400 includes a packing 410, which elastically abuts against both the oil seal assembly 300 and the packing seal assembly 200 to seal the gap between them. The packing 410 also elastically abuts against the outer surface of the slewing support end 100 to seal the gap between them. A storage chamber 201 is located outside the packing 410 so that dust and gas can only enter the storage chamber 201 after the packing 410 has failed.

[0055] like Figure 3 As shown, in this embodiment, the packing 410 is the sealing filler. When the seal of the packing sealing assembly 200 fails, a gap is generated between the packing sealing assembly 200 and the rotary support end 100. At this time, the packing 410 of the first sealing structure 400 will block the outflow of dust and gas, allowing the packing 410 to perform its sealing effect. When a gap is generated between the packing 410 and the oil seal assembly 300, dust and gas will enter the oil seal assembly 300 through the gap, causing the oil seal assembly 300 to block the leakage of dust and gas.

[0056] like Figure 3 As shown, in one embodiment, the oil seal assembly 300 has a receiving groove 301 on one side adjacent to the packing seal assembly 200. The receiving groove 301 extends to the inner side of the oil seal assembly 300. The packing 410 is received in the receiving groove 301 and elastically abuts against the oil seal assembly 300 to improve the positional stability of the packing 410 and thereby improve the sealing effect of the packing 410.

[0057] like Figure 3 As shown, in one embodiment, the first sealing structure 400 further includes a sealing ring 420, which elastically abuts against the packing seal assembly 200 and the oil seal assembly 300, respectively. The storage cavity 201 is located between the sealing ring 420 and the second sealing structure 500. In this embodiment, when the packing 410 fails, the sealing ring 420 will prevent dust and gas from entering the storage cavity 201, thus improving the sealing effect; when the sealing ring 420 fails, dust and gas will enter the storage cavity 201.

[0058] like Figure 3 As shown, in one embodiment, the second sealing structure 500 is a sealing gasket to prevent dust and gas in the storage chamber 201 from leaking through the gap between the packing sealing assembly 200 and the oil seal assembly 300, and at the same time to prevent external gas impurities from entering the storage chamber 201 through the gap between the packing sealing assembly 200 and the oil seal assembly 300, thereby preventing external gas impurities from entering the furnace through the storage chamber 201.

[0059] like Figure 3 As shown, in one embodiment, a first storage trough 202 is provided on the side of the packing seal assembly 200 adjacent to the oil seal assembly 300, and a second storage trough 302 is provided on the side of the oil seal assembly 300 adjacent to the packing seal assembly 200. The first storage trough 202 and the second storage trough 302 are arranged opposite to each other and together form a storage cavity 201. The storage cavity 201 is formed in the oil seal assembly 300 and the packing seal assembly 200, so that the space of the storage cavity 201 can be larger, thereby increasing the storage capacity of the storage cavity 201 and improving the effect of the storage cavity 201 in preventing dust leakage.

[0060] like Figure 2As shown, in one embodiment, the packing seal assembly 200 includes a stuffing box 210, elastic packing 220, and a gland 230. The stuffing box 210 is fitted onto the rotary support end 100 and fixedly connected to the sealing cap 10b. The stuffing box 210 forms an annular receiving cavity 211 with the rotary support end 100. The elastic packing 220 fills the annular receiving cavity 211. The gland 230 is fixedly connected to the stuffing box 210, with a portion of the gland 230 located within the annular receiving cavity 211 and elastically abutting against the elastic packing 220. A storage cavity 201 is formed between the gland 230 and the oil seal assembly 300.

[0061] like Figure 2 As shown, in this embodiment, the two opposite sides of the elastic packing 220 abut against the gland 230 and the stuffing box 210 respectively, so that the gland 230 and the stuffing box 210 squeeze the elastic packing 220 in the circumferential direction of the rotary support end 100, thereby causing the elastic packing 220 to deform radially along the rotary support end 100 and seal the gap between the stuffing box 210 and the rotary support end 100.

[0062] like Figure 2 As shown, in one embodiment, the packing seal assembly 200 further includes an adjusting ring 240, which is fitted onto the rotary support end 100. The adjusting ring 240 is located within the annular receiving cavity 211, and the gland 230 elastically abuts against the elastic packing 220 via the adjusting ring 240. In this embodiment, by replacing the adjusting ring 240 with one of different thicknesses, the gland 230 abuts against the elastic packing 220 via the adjusting ring 240, thus improving the versatility of the gland 230.

[0063] like Figure 2 As shown, in one embodiment, the sealing device 10c further includes an air seal assembly 600, which is fixedly connected to the packing seal assembly 200, and the air outlet of the air seal assembly 600 is connected to the annular receiving cavity 211.

[0064] like Figure 2 and Figure 4As shown, in one embodiment, the air seal assembly 600 includes a partition ring 610 and an air inlet 620. The partition ring 610 is fitted onto the rotary support end 100 and is located within the annular receiving cavity 211. The two opposite sides of the partition ring 610 elastically abut against the elastic packing 220 to prevent the partition ring 610 from damaging the sealing effect of the elastic packing 220 and to divide the elastic packing 220 into a first packing and a second packing. The partition ring 610 has an annular air seal channel 6101, which is positioned opposite to the outer surface of the rotary support end 100. The air inlet 620 is fixedly connected to the stuffing box 210, which has a clearance hole 212. The air outlet of the air inlet 620, the clearance hole 212, and the annular air seal channel 6101 are sequentially connected.

[0065] like Figure 2 and Figure 4 As shown, in this embodiment, when the rotary kiln 10 is operating, the air inlet 620 introduces sealing gas, which then enters the annular gas seal channel 6101 after passing through the air outlet end and the clearance hole 212 of the air inlet 620. At this time, the sealing gas surrounds the rotary support end 100 and blocks dust and furnace gas, forming a gas seal between the stuffing box 210 and the rotary support end 100 to prevent dust and furnace gas from leaking out. Moreover, the gas in the annular gas seal channel 6101 also compresses the elastic packing 220, improving the sealing effect of the elastic packing 220. Furthermore, when the double seal of the elastic packing 220 and the gas seal assembly 600 fails, the first sealing structure 400 comes into play.

[0066] like Figure 4 As shown, in one embodiment, the air intake 620 includes a cover 621 and an air intake pipe 622. The cover 621 is fixedly connected to the stuffing box 210 and covers the clearance hole 212. The air intake pipe 622 is fixedly connected to the cover 621, and the air intake pipe 622, the cover 621, the clearance hole 212, and the annular gas seal channel 6101 are sequentially connected. In this embodiment, the cover 621 covers the clearance hole 212 to prevent the sealing gas from leaking through the clearance hole 212.

[0067] like Figure 4As shown, in one embodiment, the partition ring 610 includes a first abutting portion 611, a second abutting portion 612, and a connecting portion 613, all located in the annular receiving cavity 211. The connecting portion 613 is located between the first abutting portion 611 and the second abutting portion 612, and is fixedly connected to the first abutting portion 611 and the second abutting portion 612 respectively. An annular air seal channel 6101 is opened in the connecting portion 613. The first abutting portion 611 and the second abutting portion 612 elastically abut against the elastic packing 220 respectively, so that the partition ring 610 divides the elastic packing 220 into a first packing and a second packing, so that the first packing, the air seal assembly 600, and the second packing sequentially perform a sealing function.

[0068] like Figure 4 As shown, in one embodiment, there is a gap between the first abutment portion 611 and the rotary support end 100, allowing gas in the annular gas seal channel 6101 to enter between the first abutment portion 611 and the rotary support end 100. There is also a gap between the second abutment portion 612 and the rotary support end 100, allowing gas in the annular gas seal channel to enter between the second abutment portion 612 and the rotary support end 100. This increases the contact area between the gas and the rotary support end, thereby increasing the gas seal area and thus improving the gas seal effect.

[0069] like Figure 4 As shown, in one embodiment, the connecting part 613 is located in the middle of the first abutting part 611 and the connecting part 613 is located in the middle of the second abutting part 612, so that the cantilever torque of the first abutting part 611 and the second abutting part 612 is smaller, thereby improving the service life of the first abutting part 611 and the second abutting part 612.

[0070] like Figure 5 As shown, in one embodiment, the oil seal assembly 300 includes a sealing ring 310 and a blocking member 320. The sealing ring 310 is used to fit onto the rotary support end 100. The sealing ring 310 is fixedly connected to the packing seal assembly 200. An oil seal groove 311 is provided on the inner side of the sealing ring 310, that is, an oil seal groove 311 is provided on the side of the sealing ring 310 facing the rotary support end 100. The oil seal groove 311 contains lubricating oil. The blocking member 320 includes a first connecting ring 321 and a sealing protrusion structure 322. The first connecting ring 321 is used to be sleeved on the rotary support end 100. There is a gap between the side of the first connecting ring 321 adjacent to the packing seal assembly 200 and the sealing ring 310. At least two sealing protrusion structures 322 are fixedly connected to the outside of the first connecting ring 321. At least two sealing protrusion structures 322 are spaced apart along the axial direction of the first connecting ring 321. Each sealing protrusion structure 322 is located in the oil seal groove 311 and elastically abuts against the sealing ring 310. Each sealing protrusion structure 322 is an annular structure.

[0071] like Figure 5As shown, in this embodiment, when the packing seal assembly 200 and the first sealing structure 400 fail, dust and gas will enter the oil seal groove 311. Since each sealing protrusion 322 elastically abuts against the sealing ring 310, each sealing protrusion 322 can prevent further flow of dust and gas. Multiple sealing protrusions 322 form multiple sealing defenses. In addition, the oil seal groove 311 contains lubricating oil, which also helps to prevent the continued flow of dust and gas, effectively preventing the continued flow of dust and gas. Furthermore, the lubricating oil provides lubrication, reducing the friction between each sealing protrusion 322 and the sealing ring 310, and extending the service life of the oil seal assembly 300.

[0072] like Figure 5 As shown, in one embodiment, the blocking member 320 further includes a second connecting ring 323, which is used to fit onto the rotary support end 100. The second connecting ring 323 is fixedly connected to the first connecting ring 321 and is located on the side of the sealing ring 310 opposite to the packing seal assembly 200. The oil seal assembly 300 also includes a clamp 330, which is engaged with the outer side of the second connecting ring 323 to fix the blocking member 320 onto the rotary support end 100. In this embodiment, the clamp 330 is an elastic annular ring. The clamp 330 is engaged with the outer side of the second connecting ring 323 to tighten the second connecting ring 323 onto the rotary support end 100, thereby fixing the blocking member 320 onto the rotary support end 100.

[0073] like Figure 5 As shown, a snap-fit ​​groove 3231 is provided on the outer side of the second connecting ring 323, and part of the clamp 330 is snapped into the snap-fit ​​groove 3231, which improves the connection stability between the clamp 330 and the second connecting ring 323.

[0074] like Figure 5 As shown, in one embodiment, each sealing protrusion structure 322, the first connecting ring 321 and the second connecting ring 323 are integrally formed structures to improve the strength and sealing effect of the blocking member 320.

[0075] like Figure 5 As shown, the blocking member 320 also includes a shaping member 324, with the first connecting ring 321 and the second connecting ring 323 covering and connected to the shaping member 324. In this embodiment, the shaping member 324 is a rigid structure, such as steel. Since the first connecting ring 321 and the second connecting ring 323 are covered and connected to the shaping member 324, the deformation of the first connecting ring 321 and the second connecting ring 323 is suppressed, resulting in higher positional stability of the blocking member 320. This ensures that each sealing protrusion structure 322 remains in a predetermined position for sealing, thereby improving the sealing effect of each sealing protrusion structure 322.

[0076] like Figure 5 As shown, in one embodiment, there are two sealing protrusion structures 322. The two sealing protrusion structures 322 are fixedly connected to the outside of the first connecting ring 321. The two sealing protrusion structures 322 are spaced apart along the axial direction of the first connecting ring 321. Each sealing protrusion structure 322 is located in the oil seal groove 311, and the two sealing protrusion structures 322 elastically abut against the two inner walls of the oil seal groove 311.

[0077] like Figure 5 As shown, in one embodiment, each sealing protrusion 322 is an annular structure, and each sealing protrusion 322 has a first sealing portion 3221 and a second sealing portion 3222. Both the first sealing portion 3221 and the second sealing portion 3222 are annular structures and are arranged to surround the rotary support end 100. An angle is formed between the first sealing portion 3221 and the second sealing portion 3222. Both the first sealing portion 3221 and the second sealing portion 3222 are located within the oil seal groove 311 and elastically abut against the inner wall of the oil seal groove 311, so that the first sealing portion 3221 and the second sealing portion 3222 are used for sealing. In this embodiment, each sealing protrusion 322 has a first sealing portion 3221 and a second sealing portion 3222, both of which are used for sealing, so that each sealing protrusion 322 has two sealing structures, improving the sealing effect of each sealing protrusion 322.

[0078] like Figure 2 As shown, in one embodiment, the sealing device 10c further includes a first fastening component 700, through which the stuffing box 210 is fixedly connected to the sealing cap 10b.

[0079] like Figure 2 As shown, in one embodiment, the stuffing box 210 has a first connecting hole, and the sealing cap 10b has a second connecting hole. The first fastening assembly 700 includes a first threaded fastener 710 and a first nut 720. The first threaded fastener 710 passes through the first connecting hole and the second connecting hole, and the first end of the first threaded fastener 710 abuts against one side of the stuffing box 210. The first nut 720 is threadedly connected to the second end of the first threaded fastener 710. The first nut 720 also abuts against one side of the sealing cap 10b away from the stuffing box 210, so that the first threaded fastener 710 and the first nut 720 together fix the stuffing box 210 and the sealing cap 10b in a fixed connection.

[0080] like Figure 3 As shown, in one embodiment, the sealing device 10c further includes a second fastening assembly 800, through which the sealing ring 310, the gland 230 and the stuffing box 210 are sequentially fixedly connected.

[0081] like Figure 3 As shown, the second fastening assembly 800 includes a double-ended stud 810, a second nut 820, and a third nut 830. The sealing ring 310 has a third connecting hole, the gland 230 has a fourth connecting hole, and the stuffing box 210 has a fifth connecting hole. The double-ended stud 810 passes through the third, fourth, and fifth connecting holes sequentially. The second nut 820 is threaded to the first end of the double-ended stud 810 and abuts against the sealing ring 310. The third nut 830 is threaded to the second end of the double-ended stud 810 and abuts against the stuffing box 210, thus securing the sealing ring 310, gland 230, and stuffing box 210 sequentially.

[0082] like Figures 1 to 5 As shown, in one embodiment, during the operation of the rotary kiln, dust and gas inside the furnace body 10a enter the gap between the sealing cover 10b and the slewing bearing end 100. Under the action of the elastic packing 220, they are blocked within the furnace body 10a. The annular air seal channel 6101 allows an air seal to be formed between the stuffing box 210 and the slewing bearing end 100. Simultaneously, the gas input through the air inlet pipe 622 can compress the elastic packing 220 along the axial direction of the stuffing box 210, causing the elastic packing 220 to... Deformation occurs, thus ensuring a good dynamic seal between the slewing bearing end 100 and the elastic packing 220; when the double seal composed of the elastic packing 220 and the gas seal fails due to the deflection and misalignment of the rotary kiln, dust and gas in the furnace body 10a will enter the gap between the pressure cover 230 and the slewing bearing end 100 through the gap created between the elastic packing 220 and the slewing bearing end 100, and the packing 410 will prevent the dust and gas from continuing to flow outward; when the packing After the seal between 410 and the gland 230 fails and a gap is created, the sealing ring 420 can, to some extent, prevent dust and gas from flowing outward. If the sealing ring 420 fails, dust and gas will enter the storage chamber 201, where the dust can be temporarily stored. External air will not enter the furnace body 10a, ensuring the furnace atmosphere. When the storage chamber 201 is full, as the furnace body 10a rotates continuously, dust and gas will continuously compress the packing 4. 10. This causes a gap to form between the packing 410 and the sealing ring 310. At this time, dust and gas will enter the oil seal groove 311 through this gap. Under the action of each sealing protrusion structure 322, it is prevented from flowing further. The design of multiple sealing protrusion structures 322 can form multiple sealing defenses, effectively preventing dust and gas leakage. Similarly, when the seal between the packing 410 and the slewing bearing end 310 fails and a gap is generated, the sealing protrusion structure 322 can also prevent dust and gas leakage.

[0083] The above-mentioned one or more technical solutions have at least the following advantages:

[0084] During the operation of the rotary kiln 10, the aforementioned sealing device 10c seals the rotary support end 100 of the furnace body 10a with the packing sealing assembly 200, i.e., the packing sealing assembly 200 blocks the flow of dust and gas. When the seal of the packing sealing assembly 200 fails, the first sealing structure 400 seals the rotary support end 100. When the seal between the first sealing structure 400 and the packing sealing assembly 200 fails, the storage chamber 201 is used to temporarily store dust and gas. At this time, the second sealing structure 500 is also used to prevent dust and gas from leaking out, while preventing external impurities from entering the storage chamber 201. When the seal between the first sealing structure 400 and the oil seal assembly 300 fails, the oil seal assembly 300 is used to prevent dust and gas from leaking out. In this way, the sealing effect of the sealing device 10c is improved by the joint blocking of dust and gas leakage by the packing sealing assembly 200, the first sealing structure 400, the storage chamber 201, the second sealing structure 500 and the oil seal assembly 300, thus avoiding the problem of powder leakage and gas leakage. At the same time, it also avoids the problem of external gas impurities entering the storage chamber 201, thereby preventing the problem of external gas impurities entering the furnace.

[0085] The embodiments described above are merely illustrative of several implementation methods described herein, and while they are detailed and specific, they should not be construed as limiting the scope of this patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these modifications and improvements are all within the scope of protection of this patent. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A sealing device, characterized in that The application relates to a rotary kiln sealing device, which comprises a packing seal assembly (200) for sleeving a rotary support end (100) of a rotary kiln (10), and the packing seal assembly (200) is fixedly connected with a sealing cover (10b) of the rotary kiln (10), and the sealing device (10c) further comprises: an oil seal assembly (300) for sleeving the rotary support end (100), and the oil seal assembly (300) is fixedly connected with one side of the packing seal assembly (200) away from the sealing cover (10b), and a storage cavity (201) is formed between the oil seal assembly (300) and the packing seal assembly (200); a first sealing structure (400) which is elastically abutted with the oil seal assembly (300) and the packing seal assembly (200) respectively, and the first sealing structure (400) is also elastically abutted with the rotary support end (100); and a second sealing structure (500) which is elastically abutted with the oil seal assembly (300) and the packing seal assembly (200) respectively, and the storage cavity (201) is located between the first sealing structure (400) and the second sealing structure (500).

2. The sealing device of claim 1, wherein The first sealing structure (400) comprises a packing ring (410) which is elastically abutted with the oil seal assembly (300) and the packing seal assembly (200) respectively, and the packing ring (410) is also elastically abutted with the outer side of the rotary support end (100), and the storage cavity (201) is located on the outer side of the packing ring (410).

3. The sealing device of claim 2, wherein, The oil seal assembly (300) is provided with a receiving groove (301) on one side adjacent to the packing seal assembly (200), the receiving groove (301) extends to the inner side of the oil seal assembly (300), the packing ring (410) is accommodated in the receiving groove (301) and elastically abutted with the oil seal assembly (300).

4. The sealing device of claim 2, wherein The first sealing structure (400) further comprises a sealing ring (420) which is elastically abutted with the packing seal assembly (200) and the oil seal assembly (300) respectively, and the storage cavity (201) is located between the sealing ring (420) and the second sealing structure (500).

5. The sealed device of claim 1, wherein, The second sealing structure (500) is a sealing gasket.

6. The sealed device of claim 1, wherein, The packing seal assembly (200) is provided with a first storage groove (202) on one side adjacent to the oil seal assembly (300), the oil seal assembly (300) is provided with a second storage groove (302) on one side adjacent to the packing seal assembly (200), and the first storage groove (202) and the second storage groove (302) are oppositely arranged and jointly form the storage cavity (201).

7. The sealed device of claim 1, wherein, The packing seal assembly (200) comprises: a packing box (210) for sleeving the rotary support end (100) and being fixedly connected with the sealing cover (10b), and the packing box (210) is used for forming an annular accommodating cavity (211) with the rotary support end (100); An elastic packing (220) is filled in the annular accommodating cavity (211); A gland (230) is fixedly connected to the packing box (210), and a part of the gland (230) is located in the annular accommodating cavity (211) and elastically abuts against the elastic packing (220), and the gland (230) and the oil seal assembly (300) form the storage cavity (201).

8. The sealing device of claim 7, wherein The packing seal assembly (200) further comprises an adjusting ring (240), the adjusting ring (240) is used for sleeving the rotary support end (100), the adjusting ring (240) is located in the annular accommodating cavity (211), and the gland (230) elastically abuts against the elastic packing (220) through the adjusting ring (240).

9. The sealing device of claim 7, wherein, The sealing device (10c) further comprises a gas seal assembly (600), the gas seal assembly (600) is fixedly connected to the packing seal assembly (200), and a gas outlet end of the gas seal assembly (600) is in communication with the annular accommodating cavity (211).

10. The sealing device of claim 9, wherein, The gas seal assembly (600) comprises: A partition ring (610) is used for sleeving the rotary support end (100), the partition ring (610) is located in the annular accommodating cavity (211), and opposite sides of the partition ring (610) elastically abut against the elastic packing (220), and the partition ring (610) is provided with an annular gas seal passage (6101), and the annular gas seal passage (6101) is used for being arranged opposite to the outer side of the rotary support end (100); An air inlet member (620) is fixedly connected to the packing box (210), the packing box (210) is provided with a position avoiding hole (212), and a gas outlet end of the air inlet member (620), the position avoiding hole (212) and the annular gas seal passage (6101) are in sequence communication.

11. The sealing device of claim 10, wherein The air inlet member (620) comprises a cover body (621) and an air inlet pipe (622), the cover body (621) is fixedly connected to the packing box (210), and the cover body (621) covers the position avoiding hole (212); the air inlet pipe (622) is fixedly connected to the cover body (621), and the air inlet pipe (622), the cover body (621), the position avoiding hole (212) and the annular gas seal passage (6101) are in sequence communication.

12. The sealed device of claim 10, wherein, The partition ring (610) comprises a first abutting portion (611), a second abutting portion (612) and a connecting portion (613), all of which are located in the annular accommodating cavity (211), the connecting portion (613) is located between the first abutting portion (611) and the second abutting portion (612), and the connecting portion (613) is fixedly connected with the first abutting portion (611) and the second abutting portion (612) respectively, the annular gas seal passage (6101) is arranged in the connecting portion (613), and the first abutting portion (611) and the second abutting portion (612) elastically abut against the elastic packing (220) respectively.

13. The sealed device of claim 1, wherein, The oil seal assembly (300) comprises: A sealing ring (310) is sleeved on the rotary support end (100), the sealing ring (310) is fixedly connected with the packing seal assembly (200), and an oil seal groove (311) is arranged on the inner side of the sealing ring (310); The blocking piece (320) comprises a first connecting ring (321) and a sealing protruding structure (322), the first connecting ring (321) is used for sleeving on the rotary support end (100), and a gap exists between the first connecting ring (321) adjacent to one side of the packing seal assembly (200) and the sealing ring (310), at least two sealing protruding structures (322) are fixedly connected to the outer side of the first connecting ring (321), and the at least two sealing protruding structures (322) are arranged at intervals along the axial direction of the first connecting ring (321), and each sealing protruding structure (322) is located in the oil seal groove (311) and elastically abuts against the sealing ring (310).

14. The sealed device of claim 13, wherein, Each sealing protruding structure (322) is an annular structure, each sealing protruding structure (322) has a first sealing part (3221) and a second sealing part (3222), the first sealing part (3221) and the second sealing part (3222) are annular structures and are arranged around the rotary support end (100), an included angle is formed between the first sealing part (3221) and the second sealing part (3222), and the first sealing part (3221) and the second sealing part (3222) are located in the oil seal groove (311) and elastically abut against the inner wall of the oil seal groove (311), so that the first sealing part (3221) and the second sealing part (3222) are used for sealing.

15. The sealed device of claim 13, wherein, The blocking piece (320) further comprises a second connecting ring (323), the second connecting ring (323) is used for sleeving on the rotary support end (100), the second connecting ring (323) is fixedly connected with the first connecting ring (321), and the second connecting ring (323) is located on the side, away from the packing seal assembly (200), of the sealing ring (310); The oil seal assembly (300) further comprises a clamp (330), the clamp (330) is clamped to the outer side of the second connecting ring (323), so that the blocking piece (320) is fixedly sleeved on the rotary support end (100).

16. The sealed device of claim 15, wherein, The outer side of the second connecting ring (323) is provided with a clamping groove (3231), and part of the clamp (330) is clamped in the clamping groove (3231).

17. The sealed device of claim 15, wherein, The blocking piece (320) further comprises a shaping piece (324), and the first connecting ring (321) and the second connecting ring (323) are connected to the shaping piece (324) in a cladding mode.

18. The sealing device according to any one of claims 15-17, characterized in that Each sealing protruding structure (322), the first connecting ring (321) and the second connecting ring (323) are an integrally formed structure.

19. A rotary kiln characterized by, The sealing device (10c) according to any one of claims 1 to 18, a furnace body (10a) having a rotary support end (100), the packing seal assembly (200) being sleeved on the rotary support end (100), the packing seal assembly (200) being fixedly connected with the sealing cover (10b), and the oil seal assembly (300) being sleeved on the rotary support end (100).

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