CN219064105U - Sealing device - Google Patents

Abstract

The utility model belongs to the technical field of sealing equipment, and particularly relates to a sealing device; the sealing device comprises a sealing inner cylinder and a sealing cover; the fixed end of the sealing inner cylinder is communicated with equipment to be sealed; the sealing cover is of a barrel-shaped structure with one end provided with an opening, the inner side wall of the sealing cover is provided with a sealing assembly, the opening of the sealing cover is sleeved at one end of the sealing inner barrel away from equipment to be sealed, and a gap between the sealing inner barrel and the sealing cover is sealed by the sealing assembly. The sealing cover in the sealing device is sleeved on the sealing inner cylinder, and the gap between the sealing cover and the sealing inner cylinder is sealed through the sealing component arranged in the sealing cover, so that the gap required to be sealed by the sealing component can be effectively reduced through the matching of the sealing cover and the sealing inner cylinder, the air leakage rate of the sealing component is reduced, the sealing effect of the sealing device is effectively improved, the sealing effect of the rotary kiln can be effectively improved when the sealing device is applied to the rotary kiln, and the potential safety hazard of an oil-based rock debris distillation treatment process is reduced.

Description

Sealing device

Technical Field

The utility model belongs to the technical field of sealing equipment, and particularly relates to a sealing device.

Background

In oil-based rock debris distillation treatment processes, an indirect heating rotary kiln is a process commonly adopted in the industry.

When the rotary kiln works, a large amount of high-temperature oil vapor is generated in the rotary kiln, and the high-temperature oil vapor is mixed with air, so that explosion accidents are very easy to occur, and the process requires that the rotary kiln has good sealing performance.

In the prior art, a rotary kiln mostly adopts a scale sealing technology, such as a Chinese patent utility model patent with the name of 202021880605.1 and a wear-resistant scale sealing structure of the rotary kiln, and the rotary kiln comprises a rotary kiln barrel, wherein a front end plate is arranged at the front end of the rotary kiln barrel, a slag collecting box is arranged at the rear end of the rotary kiln barrel, a dust cover is arranged at the top end of the slag collecting box, the dust cover comprises a fixed cover, a movable cover is movably sleeved outside the fixed cover, a scale sealing ring is arranged between the slag collecting box and the rotary kiln barrel, and a wear-resistant lining plate ring is arranged between the scale sealing ring and the rotary kiln barrel.

The fish scale sealing ring is positioned between the slag collecting box and the rotary kiln cylinder and is used for sealing a gap between the slag collecting box and the rotary kiln cylinder; however, the scale seal ring is composed of a plurality of seal plates, the seal area is large, the air leakage rate is high, and in the oil-based rock debris distillation treatment process, great potential safety hazards exist. Therefore, the utility model provides a sealing device capable of effectively improving the sealing effect of the rotary kiln, which is a technical problem to be solved by the technicians in the field.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a sealing device to solve the technical problems that a fish scale sealing ring in the prior art is high in air leakage rate and has a large potential safety hazard in an oil-based rock debris distillation treatment process.

The utility model is realized by the following technical scheme:

a sealing device comprises a sealing inner cylinder and a sealing cover;

the sealing inner cylinder is of a circular tubular structure, and the fixed end of the sealing inner cylinder is communicated with equipment to be sealed;

the sealing cover is of a barrel-shaped structure with one end provided with an opening, the inner side wall of the sealing cover is provided with a sealing assembly, the opening of the sealing cover is sleeved at one end, far away from equipment to be sealed, of the sealing inner cylinder, and the sealing assembly seals a gap between the sealing inner cylinder and the sealing cover.

For better realising the utility model, a further optimization is made in the above structure, said sealing assembly comprising a sealing packing a, a sealing packing B, a rope and at least two ring plates;

the annular plates are of annular plate-shaped structures, all the annular plates are sequentially arranged along the axial direction of the sealing cover, a plurality of connecting pieces A are arranged on two sides of each annular plate, a plurality of connecting pieces A are sequentially arranged along the circumferential direction of each annular plate, and two adjacent annular plates are connected through the connecting pieces A;

the sealing filler A and the sealing filler B are multiple in number, the sealing fillers A are correspondingly arranged between two adjacent connecting pieces A one by one, the sealing fillers B are sequentially arranged around the outer circumference direction of the sealing filler A, and two ends of the sealing filler B are respectively lapped on the two adjacent connecting pieces A;

the rope winds the outside of a plurality of sealing fillers B along the circumferential direction of the sealing inner cylinder, two ends of the rope are respectively positioned at two sides of the sealing inner cylinder, and the two ends of the rope are respectively penetrated out of the sealing cover and hung with a balancing weight.

In order to better realize the utility model, the structure is further optimized, and a plurality of connecting pieces B are arranged on two sides of the annular plate;

the connecting pieces B are sequentially arranged along the circumferential direction of the annular plate, and two adjacent annular plates are connected through the connecting pieces B; the connecting pieces B are located between two adjacent connecting pieces A, the distance from the connecting pieces B to the circle center of the annular plate is larger than the distance from the connecting pieces A to the circle center of the annular plate, and the sealing fillers B are arranged between the two adjacent connecting pieces B in a one-to-one correspondence mode.

In order to better realize the utility model, the structure is further optimized, and the distance from the inner side wall of the connecting piece A to the center of the circle of the annular plate is larger than or equal to the inner diameter of the annular plate; the distance from the outer side wall of the connecting piece A to the circle center of the annular plate is smaller than the distance from the outer side wall of the sealing filler A to the circle center of the annular plate.

In order to better realize the utility model, in the structure, two perforations are arranged on the sealing cover, annular sealing rings are arranged at the perforations, two ends of the rope respectively penetrate through the two perforations, and the annular sealing rings seal gaps between the rope and the perforations.

In order to better implement the present utility model, further optimization is made in the above structure, the seal assembly further includes a pressure plate; the quantity of the pressing plates is equal to that of the sealing fillers B, the pressing plates are arranged on one side, away from the sealing fillers A, of the sealing fillers B in a one-to-one correspondence mode, and the ropes are wound on the outer portions of the pressing plates along the circumferential direction of the sealing inner cylinder.

In order to better realize the utility model, in the structure, the side of the pressing plate, which is far away from the sealing filler B, is provided with two lug plates, through holes are formed in the two lug plates, the two lug plates are respectively close to the two ends of the pressing plate, and the ropes are arranged in the through holes.

In order to better realize the utility model, the structure is further optimized, the circumferential inner side wall of the sealing cover is provided with a mounting groove, the mounting groove is arranged around the sealing cover, and the sealing assembly is arranged in the mounting groove.

In order to better realize the utility model, in the structure, the space between the circumferential outer side wall of the sealing assembly and the bottom of the mounting groove forms a sealing space, the outer side wall of the sealing cover is provided with an inflation port, the inflation port is provided with a sealing plug for sealing the inflation port, the inflation port is communicated with the sealing space, and inert gas is filled in the sealing space.

In order to better realize the utility model, the structure is further optimized, and the sealing cover comprises an upper shell and a lower shell; the upper shell and the lower shell are of semicircular structures, and two ends of the upper shell are connected with two ends of the lower shell through bolts.

In summary, the utility model has the following technical effects:

the sealing cover in the sealing device is sleeved on the sealing inner cylinder, and the gap between the sealing cover and the sealing inner cylinder is sealed through the sealing component arranged in the sealing cover, so that the gap required to be sealed by the sealing component can be effectively reduced through the matching of the sealing cover and the sealing inner cylinder, the air leakage rate of the sealing component is reduced, the sealing effect of the sealing device is effectively improved, the sealing effect of the rotary kiln can be effectively improved when the sealing device is applied to the rotary kiln, and the potential safety hazard of an oil-based rock debris distillation treatment process is reduced.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a seal assembly of the present utility model mounted on a rotary kiln;

fig. 2 is a partial enlarged view of a portion B in fig. 1;

FIG. 3 is a cross-sectional view taken along the direction A-A in FIG. 1;

fig. 4 is a partial enlarged view of a portion C in fig. 3.

Reference numerals:

1. sealing the inner cylinder;

2. a sealing cover; 21. a mounting groove; 22. an inflation inlet; 231. an upper housing; 232. a lower housing;

3. a seal assembly; 31. a ring plate; 321. sealing filler A; 322. sealing filler B; 33. a rope; 341. a connecting piece A; 342. a connecting piece B; 35. balancing weight; 36. a pressing plate; 361. ear plates;

41. a cylinder; 42. a kiln head cover; 43. and a feeding device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

In the description of the present utility model, it is to be noted that, unless otherwise indicated, the meaning of "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

Examples:

as shown in fig. 1 to 4:

a sealing device comprises a sealing inner cylinder 1 and a sealing cover 2; wherein, the liquid crystal display device comprises a liquid crystal display device,

the sealing inner cylinder 1 is of a circular tubular structure, and the fixed end of the sealing inner cylinder 1 is communicated with equipment to be sealed;

the sealing cover 2 is of a barrel-shaped structure with one end provided with an opening, the inner side wall of the sealing cover 2 is provided with a sealing assembly 3, the opening of the sealing cover 2 is sleeved at one end of the sealing inner cylinder 1 far away from equipment to be sealed, and the sealing assembly 3 seals a gap between the sealing inner cylinder 1 and the sealing cover 2.

The sealing cover 2 in the sealing device is sleeved on the sealing inner cylinder 1, and the gap between the sealing cover 2 and the sealing inner cylinder 1 is sealed through the sealing component 3 arranged in the sealing cover 2, and the sealing cover 2 and the sealing inner cylinder 1 can be matched to effectively reduce the gap required to be sealed by the sealing component 3 so as to reduce the air leakage rate of the sealing component 3, thereby effectively improving the sealing effect of the sealing device, and applying the sealing device to the rotary kiln can effectively improve the sealing effect of the rotary kiln so as to reduce the potential safety hazard of the oil-based rock debris distillation treatment process.

The sealing device can be arranged at the kiln head and/or the kiln tail of the rotary kiln; when the sealing device is installed at the kiln head of the rotary kiln, the fixed end of the sealing inner cylinder 1 is required to be communicated with the head of the cylinder 41 of the rotary kiln, and the sealing inner cylinder 1 and the cylinder 41 are required to be coaxially arranged;

one end of the sealing cover 2, which is far away from the cylinder 41, is fixedly connected with a kiln head cover 42 of the rotary kiln, and one end of the sealing cover 2, which is far away from the cylinder 41, is communicated with the kiln head cover 42 so that the cylinder 41 is communicated with the kiln head cover 42, and the sealing device can seal a gap between the kiln head cover 42 and the cylinder 41;

when the rotary kiln is in a working state, the cylinder 41 rotates around the axis of the rotary kiln, the sealing inner cylinder 1 rotates along with the cylinder 41, the sealing inner cylinder 1 and the sealing cover 2 rotate relatively, normal working of the rotary kiln cannot be affected, and the sealing assembly 3 in the sealing cover 2 can seal a gap between the sealing inner cylinder 1 and the sealing cover 2;

when the sealing cover 2 is installed at the kiln tail of the rotary kiln, the fixed end of the sealing inner cylinder 1 is required to be communicated with the tail of the cylinder 41 of the rotary kiln, and the sealing inner cylinder 1 and the cylinder 41 are required to be coaxially arranged;

the sealing cover 2 is sleeved at one end of the sealing inner cylinder 1 far away from the cylinder 41, the feeding device 43 of the rotary kiln penetrates through the closed end of the sealing cover 2 (one end of the sealing cover 2 far away from the cylinder 41) to extend into the cylinder 41, and the joint of the sealing cover 2 and the feeding device 43 is fixed and sealed in a welding mode;

when the rotary kiln is in a working state, the cylinder 41 rotates around the axis of the rotary kiln, the sealing inner cylinder 1 rotates along with the cylinder 41, the sealing inner cylinder 1 and the sealing cover 2 rotate relatively, normal operation of the rotary kiln cannot be influenced, and the sealing assembly 3 in the sealing cover 2 can seal a gap between the sealing inner cylinder 1 and the sealing cover 2, so that safety accidents caused by mixing of high-temperature oil steam and air in the cylinder 41 are avoided.

Optimally, the sealing assembly 3 comprises a sealing filler A321, a sealing filler B322, a rope 33 and at least two annular plates 31; wherein, the liquid crystal display device comprises a liquid crystal display device,

the annular plates 31 are of annular plate-shaped structures, all annular plates 31 are sequentially arranged along the axial direction of the sealing cover 2, a plurality of connecting pieces A341 are arranged on two sides of each annular plate 31, the connecting pieces A341 are sequentially arranged along the circumferential direction of each annular plate 31, two adjacent annular plates 31 are connected through the connecting pieces A341, and the space between the two adjacent annular plates 31 is divided into a plurality of stuffing boxes through the connecting pieces A341;

the sealing filler A321 and the sealing filler B322 are multiple in number, and the sealing fillers A321 are arranged between two adjacent connecting pieces A341 in one-to-one correspondence, namely the sealing fillers A321 are arranged in the stuffing box in one-to-one correspondence; the inner side wall of the sealing filler A321 is directly contacted with the outer side wall of the sealing inner cylinder 1, and the arrangement of the connecting piece A341 can effectively prevent the sealing filler A321 from wrinkling caused by mutual friction when the sealing inner cylinder 1 rotates, so as to ensure the sealing effect of the sealing device;

the plurality of sealing fillers B322 are sequentially arranged around the outer circumferential direction of the sealing filler A321, and two ends of the sealing filler B322 are respectively lapped on the two adjacent connecting pieces A341, so that the sealing filler A321 and the sealing filler B322 are arranged in the two adjacent annular plates 31 in a staggered manner;

the rope 33 winds the outsides of a plurality of sealing fillers B322 along the circumferential direction of the sealing inner barrel 1, two ends of the rope 33 are respectively positioned at two sides of the sealing inner barrel 1, two ends of the rope 33 are respectively penetrated out of the sealing cover 2 and hung with a balancing weight 35, and the rope 33 is tensioned by utilizing the gravity of the balancing weight 35, so that the rope 33 can press the sealing fillers A321 and B322, and the sealing effect of the sealing device is further improved.

It should be noted that, the plurality of ring plates 31 are sequentially arranged, and the intervals between two adjacent ring plates 31 are equal, and a sealing filler a321 and a sealing filler B322 are also arranged between the two ring plates 31 at two ends and the sealing cover 2, so as to better realize the sealing between the cylinder 41 and the kiln hood 42 or between the cylinder 41 and the feeding device 43;

because the sealing filler A321 and the sealing filler B322 generate lateral deformation under the action of the circumferential tension force of the rope 33, the side surfaces of the sealing filler A321 and the sealing filler B322 can be clung to the adjacent two annular plates 31 to form a static sealing structure, thereby effectively preventing the leakage of high-temperature oil steam.

Optimally, the sealing filler A321 and the sealing filler B322 are in interference fit with the adjacent two ring plates 31, so that the sealing effect of the sealing device is improved.

Preferably, the sealing filler a321 and the sealing filler B322 are made of impregnated graphite packing or expanded graphite.

Preferably, a plurality of connecting pieces B342 are provided on both sides of the ring plate 31;

the plurality of connecting pieces B342 are sequentially arranged along the circumferential direction of the annular plate 31, and the adjacent two annular plates 31 are connected through the connecting pieces B342, so that the connection of the adjacent two annular plates 31 is more stable;

the connecting pieces B342 are positioned between two adjacent connecting pieces A341, the distance from the connecting pieces B342 to the center of the ring plate 31 is larger than the distance from the connecting pieces A341 to the center of the ring plate 31, and the sealing fillers B322 are correspondingly arranged between the two adjacent connecting pieces B342 one by one, so that the sealing fillers B322 and the sealing fillers A321 can be arranged in a staggered manner, and the sealing effect of the sealing device is further improved;

and the arrangement of the connecting piece B342 can avoid the occurrence of wrinkles caused by friction between the sealing filler B322 and the sealing filler A321, so as to ensure that the sealing device can be used normally.

Preferably, the distance between two adjacent connecting pieces A341 is equal, the distance between two adjacent connecting pieces B342 is equal, and the sealing filler A321 and the sealing filler B322 can be synchronously produced by adopting mechanical equipment, so that the sealing filler A321 and the sealing filler B322 are more convenient to produce, and the structure of the sealing device is more stable.

Optimally, the distance from the inner side wall of the connecting piece A341 to the center of the ring plate 31 is larger than or equal to the inner diameter of the ring plate 31, so that the connecting piece A341 cannot contact the inner sealing cylinder 1, and friction between the connecting piece A341 and the inner sealing cylinder 1 is avoided;

the distance from the outer side wall of the connecting piece A341 to the center of the ring plate 31 is smaller than the distance from the outer side wall of the sealing filler A321 to the center of the ring plate 31, so that the sealing filler B322 can be tightly attached to the outer side wall of the sealing filler A321, and the sealing effect of the sealing device is effectively improved.

Preferably, the sealing cover 2 is provided with two perforations; wherein, the liquid crystal display device comprises a liquid crystal display device,

the perforation is provided with an annular sealing ring, after the rope 33 is arranged around the sealing filler B322, two ends of the rope 33 are respectively penetrated out of the two perforations and are connected with the balancing weight 35, and the annular sealing ring can seal a gap between the rope 33 and the perforations so as to improve the sealing effect of the sealing device.

It should be noted that, the above-mentioned ring seal is made of rubber material, and the outer side wall of the ring seal is attached to the perforated side wall, and the inner side wall of the ring seal is attached to the outer surface of the rope 33, so as to play a role in sealing the gap between the rope 33 and the perforation, and not to affect the movement of the rope 33.

Preferably, the sealing assembly 3 further comprises a pressing plate 36; wherein, the liquid crystal display device comprises a liquid crystal display device,

the number of the pressing plates 36 is equal to that of the sealing fillers B322, and the pressing plates 36 are arranged on one side, away from the sealing fillers A321, of the sealing fillers B322 in a one-to-one correspondence manner;

the ropes 33 are wound on the outer parts of the pressing plates 36 along the circumferential direction of the inner seal cylinder 1, so that pretightening force applied by the ropes 33 to the sealing filler A321 and the sealing filler B322 can act on the pressing plates 36 and be transmitted to the sealing filler B322 through the pressing plates 36, the pretightening force is transmitted more uniformly, and the situation that the ropes 33 squeeze and damage the sealing filler B322 can be avoided.

Preferably, the side of the pressing plate 36 away from the sealing filler B322 is provided with two ear plates 361; wherein, the liquid crystal display device comprises a liquid crystal display device,

the two ear plates 361 are respectively provided with a through hole, and the two ear plates 361 are respectively arranged close to two ends of the pressing plate 36, and the rope 33 is arranged in the through holes, so that the situation that the pressing plate 36 cannot be pressed due to the change of the position of the rope 33 is avoided.

Preferably, the inner diameter of the annular plate 31 is larger than the outer diameter of the inner sealing cylinder 1, so as to avoid the damage of parts caused by collision or hard friction with the annular plate 31 when the inner sealing cylinder 1 jumps with the cylinder 41 (the concentricity is insufficient); the inner diameter of the annular plate 31 is preferably 10mm larger than the outer diameter of the seal inner cylinder 1.

When the cylinder 41 generates radial runout during rotation due to manufacturing and installation reasons, the sealing filler A321 and the sealing filler B322 and the annular plate 31 can generate relative sliding in the radial direction, and the sealing filler A321 and the sealing filler B322 can synchronously slide in the runout direction along with the sealing inner cylinder 1 to form a dynamic sealing structure, so that leakage of high-temperature oil steam is effectively prevented.

Preferably, the circumferential inner side wall of the sealing cover 2 is provided with a mounting groove 21, the mounting groove 21 is arranged around the sealing cover 2, and the sealing assembly 3 is arranged in the mounting groove 21.

Optimally, the space between the circumferential outer side wall of the sealing assembly 3 and the bottom of the mounting groove 21 forms a sealing space, the outer side wall of the sealing cover 2 is provided with an inflation inlet 22, the inflation inlet 22 is provided with a sealing plug for sealing the inflation inlet 22, the inflation inlet 22 is communicated with the sealing space, and inert gas is filled in the sealing space;

the inert gas acts as follows:

1. the pressure of the sealing filler A321 and the sealing filler B322 extruded to the sealing inner cylinder 1 is increased, so that the sealing effect of the sealing device is improved;

2. the sealing filler A321 and the sealing filler B322 have an isolating function under the condition of small leakage, and the safety accident caused by the direct mixing of air and high-temperature oil vapor is avoided.

Preferably, the inert gas is nitrogen, and the pressure of the nitrogen in the sealed space is 0.1MPa.

Preferably, the sealing cover 2 includes an upper housing 231 and a lower housing 232; the upper shell 231 and the lower shell 232 are of semicircular structures, and two ends of the upper shell 231 are connected with two ends of the lower shell 232 through bolts, so that the sealing cover 2 is simpler to install and detach;

when the sealing packing a321 and the sealing packing B322 need to be replaced, only the bolts connecting the two ends of the upper housing 231 and the lower housing 232 need to be taken down, so that the maintenance of the sealing device is more convenient and quicker.

Preferably, a gasket is provided at the junction of the upper housing 231 and the lower housing 232 to improve the sealing effect at the junction of the upper housing 231 and the lower housing 232.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. A sealing device, characterized in that: comprises a sealing inner cylinder (1) and a sealing cover (2);

the sealing inner cylinder (1) is of a circular tubular structure, and the fixed end of the sealing inner cylinder (1) is communicated with equipment to be sealed;

the sealing cover (2) is of a barrel-shaped structure with one end provided with an opening, the inner side wall of the sealing cover (2) is provided with a sealing assembly (3), the opening of the sealing cover (2) is sleeved at one end, far away from equipment to be sealed, of the sealing inner cylinder (1), and the sealing assembly (3) seals a gap between the sealing inner cylinder (1) and the sealing cover (2).

2. The sealing device of claim 1, wherein: the sealing assembly (3) comprises a sealing filler A (321), a sealing filler B (322), a rope (33) and at least two annular plates (31);

the annular plates (31) are of annular plate-shaped structures, all the annular plates (31) are sequentially arranged along the axial direction of the sealing cover (2), a plurality of connecting pieces A (341) are arranged on two sides of each annular plate (31), the connecting pieces A (341) are sequentially arranged along the circumferential direction of each annular plate (31), and two adjacent annular plates (31) are connected through the connecting pieces A (341);

the sealing filler A (321) and the sealing filler B (322) are multiple in number, the sealing fillers A (321) are correspondingly arranged between two adjacent connecting pieces A (341), the sealing fillers B (322) are sequentially arranged around the outer circumference direction of the sealing filler A (321), and two ends of the sealing filler B (322) are respectively lapped on the two adjacent connecting pieces A (341);

the rope (33) is wound on the outer parts of the sealing fillers B (322) along the circumferential direction of the sealing inner cylinder (1), two ends of the rope (33) are respectively positioned on two sides of the sealing inner cylinder (1), and the two ends of the rope (33) are respectively penetrated out of the sealing cover (2) and hung with a balancing weight (35).

3. The sealing device of claim 2, wherein: a plurality of connecting pieces B (342) are arranged on both sides of the annular plate (31);

the plurality of connecting pieces B (342) are sequentially arranged along the circumferential direction of the annular plate (31), and two adjacent annular plates (31) are connected through the connecting pieces B (342); the connecting pieces B (342) are located between two adjacent connecting pieces A (341), the distance from each connecting piece B (342) to the circle center of the annular plate (31) is larger than the distance from each connecting piece A (341) to the circle center of the annular plate (31), and the sealing fillers B (322) are arranged between two adjacent connecting pieces B (342) in a one-to-one correspondence mode.

4. A sealing device according to claim 3, wherein: the distance from the inner side wall of the connecting piece A (341) to the center of the circle of the annular plate (31) is larger than or equal to the inner diameter of the annular plate (31); the distance from the outer side wall of the connecting piece A (341) to the center of the annular plate (31) is smaller than the distance from the outer side wall of the sealing filler A (321) to the center of the annular plate (31).

5. The sealing device of claim 4, wherein: two perforations are formed in the sealing cover (2), annular sealing rings are arranged at the perforations, two ends of the rope (33) penetrate out of the two perforations respectively, and the annular sealing rings seal gaps between the rope (33) and the perforations.

6. The sealing device of claim 5, wherein: the seal assembly (3) further comprises a pressure plate (36); the number of the pressing plates (36) is equal to that of the sealing fillers B (322), the pressing plates (36) are arranged on one side, away from the sealing fillers A (321), of the sealing fillers B (322) in a one-to-one correspondence mode, and the ropes (33) are wound on the outer portions of the pressing plates (36) along the circumferential direction of the inner sealing cylinder (1).

7. The sealing device of claim 6, wherein: two lug plates (361) are arranged on one side, far away from the sealing filler B (322), of the pressing plate (36), through holes are formed in the two lug plates (361), the two lug plates (361) are respectively close to two ends of the pressing plate (36), and the ropes (33) are arranged in the through holes.

8. The sealing device according to any one of claims 1 to 7, wherein: the circumference inside wall of sealed cowling (2) is provided with mounting groove (21), mounting groove (21) encircle sealed cowling (2) sets up, seal assembly (3) set up in mounting groove (21).

9. The sealing device of claim 8, wherein: the sealing device is characterized in that a sealing space is formed between the circumferential outer side wall of the sealing assembly (3) and the bottom of the mounting groove (21), an air charging port (22) is formed in the outer side wall of the sealing cover (2), a sealing plug for sealing the air charging port (22) is arranged at the air charging port (22), the air charging port (22) is communicated with the sealing space, and inert gas is filled in the sealing space.

10. The sealing device of claim 1, wherein: the seal cover (2) comprises an upper shell (231) and a lower shell (232); the upper shell (231) and the lower shell (232) are of semicircular structures, and two ends of the upper shell (231) are connected with two ends of the lower shell (232) through bolts.

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