CN220435395U - Sealing structure suitable for multi-chamber equipment - Google Patents

Abstract

The utility model relates to the technical field of multi-chamber container sealing, in particular to a sealing structure suitable for multi-chamber equipment, which is applied to an annular sealing part formed by nesting inner and outer pressure chambers, wherein a connecting seat for connecting an inner pressure chamber is arranged in the outer pressure chamber, the connecting seat is provided with a surrounding structure surrounding the outer side wall of the inner pressure chamber, a lower sealing gap is formed between the surrounding structure and the inner pressure chamber, a lower sealing filler is arranged in the lower sealing gap, and the lower filler is tightly sealed by a lower pressure ring surrounding the inner pressure chamber; the lower lamination ring comprises an upward extending ring part, an upper sealing gap is formed between the ring part and the outer side wall of the internal pressure cavity, an upper layer sealing filler is arranged in the upper sealing gap, and the upper layer sealing filler is tightly pressed and sealed through an upper layer pressing ring. The upper lamination ring and the lower lamination ring are used for compressing and sealing, and two layers of fillers are arranged to form an upper layer and a lower layer of sealing structure, so that the sealing structure is simplified, the sealing effect is guaranteed, and the convenience of installation and disassembly can be met.

Description

Sealing structure suitable for multi-chamber equipment

Technical Field

The utility model relates to the technical field of sealing of various containers, in particular to a sealing structure suitable for a multi-chamber container, which is particularly suitable for sealing of high-temperature and high-pressure equipment, is applied to annular sealing positions of inner and outer pressure chambers in a nested manner, and particularly relates to a sealing structure suitable for multi-chamber equipment.

Background

Many multi-chamber high-temperature high-pressure devices exist in petrochemical devices, and effective sealing measures are needed to be adopted between adjacent chambers to reduce medium flow, and meanwhile, the large thermal expansion displacement can be absorbed. There are two main solutions at present, one is to use an expansion joint structure, and the other is to use a stuffing box structure.

The expansion joint structure can be divided into a two-end complete welding structure and a two-end flange connecting structure, the two-end complete welding structure can effectively block the mutual flow of media between adjacent chambers in theory, but the actual effect is greatly different from the ideal condition due to a plurality of uncertain factors existing in the processes of designing, manufacturing, transporting, using and the like of the expansion joint; the latter, in turn, increases the risk of leakage due to the presence of the flange, and also makes replacement quite difficult due to the fact that the expansion joint is arranged inside the device, once it is damaged, limited by the operating space.

The packing box structure can effectively solve the problem of large thermal expansion displacement in the operation process, can well adapt to the requirement of device maximization, but the packing sealing structure applied to the petrochemical device at present is only of a single-layer structure, the diameter of an applicable pipeline is relatively small, and for convenient maintenance, the packing needs to be arranged outside equipment, and although the convenience of external operation is far greater than that of internal operation, the equipment needs to be compatible with pipeline connection and ensure the operation space and the detachability when the packing is replaced, so that the external system and structure become very complex and high in cost.

Therefore, a more reasonable technical scheme is required to be provided, and the technical problems in the prior art are solved.

Disclosure of Invention

At least to overcome one of the above mentioned drawbacks, the present utility model proposes a sealing structure suitable for multi-chamber devices, in which the compression ring is segmented so that the workers can replace and detach the packing inside the device, and the working strength and difficulty are greatly reduced compared with the expansion joint structure, and the sealing structure is simplified compared with the complex structure of external single-layer packing sealing.

In order to achieve the above object, the sealing structure disclosed by the utility model can adopt the following technical scheme:

the sealing structure is suitable for multi-chamber equipment, is applied to an annular sealing part which is nested in an inner pressure cavity and an outer pressure cavity, a connecting seat which is used for connecting the inner pressure cavity is arranged in the outer pressure cavity, a surrounding structure which surrounds the outer side wall of the inner pressure cavity is arranged on the connecting seat, a lower sealing gap is formed between the surrounding structure and the inner pressure cavity, a lower sealing filler is arranged in the lower sealing gap, and the lower filler is tightly pressed and sealed through a lower pressing ring which surrounds the inner pressure cavity; the lower lamination ring comprises an upward extending ring part, an upper sealing gap is formed between the ring part and the outer side wall of the internal pressure cavity, an upper layer sealing filler is arranged in the upper sealing gap, and the upper layer sealing filler is tightly pressed and sealed through an upper layer pressing ring.

The sealing structure disclosed by the above is characterized in that the sealing filler is arranged inside the equipment, so that complex matched structures and systems designed outside are avoided. The lower layer sealing packing is tightly pressed and sealed by adopting the lower layer pressing ring, and the upper layer sealing packing is tightly pressed and sealed by adopting the upper layer pressing ring, so that the sealing connection between the inner pressure cavity and the outer pressure cavity can be realized under the combined action of the two layers of sealing structures; the thermal expansion displacement is satisfied, the integral sealing structure is simplified, and the installation construction and the subsequent disassembly and overhaul are facilitated.

Further, the lower lamination ring used in the present utility model is used to achieve the compression seal of the lower sealing filler, and the lower lamination ring may take a variety of structural forms, which are not limited only, but are optimized and one of the possible options is presented herein: the lower lamination ring comprises a connecting edge part, a compression ring structure extending to the lower sealing gap is formed on the inner side of the connecting edge part, an annular groove is formed on the lower surface of the connecting edge part, and a supporting protrusion is arranged on the connecting seat corresponding to the annular groove. By adopting the scheme, the supporting protrusions and the annular grooves form dislocation baffling, so that the medium flow resistance is increased, and the sealing effect can be ensured; meanwhile, the supporting protrusions support the connecting edge, so that the stress balance and stability of the connecting edge are kept.

Still further, in order to ensure the support stability, the structure of the supporting protrusion may be configured in various, in particular but not exclusively limited, and is optimized and one of possible choices is proposed herein: the supporting bulge is in a convex ring shape. When the scheme is adopted, the supporting bulge and the connecting seat are integrally formed.

Further, after the lower pressure ring is disposed, the structure for forming the upper sealing gap upwards may be various forms, specifically but not limited to, and is optimized and one of possible choices is provided herein: the ring part extending upwards is arranged at the connecting edge part. When the scheme is adopted, the ring part extending upwards and the connecting edge part are integrally formed.

Further, after the lower press ring is set, in order to ensure stable connection between the lower press ring and the connecting seat, the connection can be reinforced in various ways, and optimization is performed and one of the possible options is proposed here: the lower-layer pressing ring is fixedly connected with the connecting seat through a fastener. With such an arrangement, the fastener may be a fastening bolt.

Further, in making the connection of the lower laminate ring to the connection seat, various forms of connection structures may be provided, which are not limited only, and here are optimized and one of the possible options is presented: the connecting seat is provided with a plurality of connecting parts at intervals, and the fastener passes through the lower layer compression ring and is in fastening connection with the connecting parts. When the scheme is adopted, the connecting parts are uniformly arranged at intervals along the circumferential surface.

Further, the upper pressure ring is also used for pressing to form a seal, the specific structure is not limited only, and optimization is performed herein and one possible choice is proposed: the upper lamination ring includes a connecting rim portion, and a compression ring structure extending toward the upper sealing gap is formed on the inner side of the connecting rim portion. When the scheme is adopted, the connecting edge part and the compression ring structure are integrally formed.

Further, in the present utility model, the upper pressure ring also ensures the reliability of the sealing structure by means of connection and fixation, and specifically, optimization is performed here and one of possible choices is proposed: the upper pressure ring is fixedly connected with the connecting seat through a fastener. With such an arrangement, the fastener may be a bolt.

Still further, the attachment of the upper laminate to the attachment base may also be accomplished by fasteners, where optimization is performed and one of the possible options is presented: the connecting seat is provided with a plurality of connecting parts at intervals, and the fastening piece penetrates through the upper layer compression ring and is in fastening connection with the connecting parts. When the scheme is adopted, the connecting parts of the upper lamination ring and the lower lamination ring which are respectively correspondingly matched are arranged at intervals, so that interference between the upper lamination ring and the lower lamination ring is avoided.

Further, in order to facilitate maintenance and repair, the structures of the upper layer compression ring and the lower layer compression ring are optimized, and one of the possible choices is proposed here: the upper lamination ring and/or the lower lamination ring comprise a plurality of pressing pieces, and the adjacent pressing pieces are in press fit and are connected and fastened through a step structure.

Further, in the present utility model, the structure of the connection seat is not limited only, and in order to better accommodate the lower sealing filler, optimization is performed and one of possible choices is proposed herein: the surrounding structure of the connecting seat is internally provided with a step structure for containing lower sealing filler, and the step structure faces the outer side wall of the internal pressure cavity and forms a lower sealing gap. When the scheme is adopted, the gap between the surrounding structure and the outer side wall of the internal pressure cavity is changed at the step structure, so that more lower-layer sealing filler can be contained, and a more stable sealing structure is formed; while also allowing for greater assurance of thermal expansion displacement.

Compared with the prior art, the technical scheme disclosed by the utility model has the following partial beneficial effects:

according to the utility model, the upper lamination ring and the lower lamination ring are used for compression sealing, and two layers of fillers are arranged to form an upper-layer sealing structure and a lower-layer sealing structure, so that the sealing structure is simplified, the sealing effect is ensured, and the convenience of installation and disassembly can be met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the composition of a seal structure.

Fig. 2 is an enlarged schematic view of a portion of the seal structure.

Fig. 3 is a schematic cross-sectional structure of the lower pressure ring.

Fig. 4 is a schematic top view of the upper press ring.

Fig. 5 is a schematic view of the mating structure between adjacent press sheets.

In the above figures, the meaning of each symbol is:

1. an outer pressure chamber; 2. an internal pressure cavity; 3. a connecting seat; 301. a surrounding structure; 302. a supporting protrusion; 4. an upper press ring; 401. tabletting; 5. a lower press ring; 501. a connecting edge portion; 502. a ring portion; 503. a clamp ring structure; 504. a ring groove; 6. an upper layer of sealing filler; 7. and (5) a lower layer of sealing filler.

Detailed Description

The utility model is further illustrated by the following description of specific embodiments in conjunction with the accompanying drawings.

Aiming at the condition that the ring seal before the inner pressure cavity and the outer pressure cavity in the prior art is inconvenient to operate or complex in structure, the following embodiments are optimized to overcome the defects in the prior art.

Examples

As shown in fig. 1 and 2, the present embodiment provides a sealing structure suitable for multi-chamber equipment, which is applied to an annular sealing place where an inner pressure chamber 1 and an outer pressure chamber 1 are nested, a connecting seat 3 for connecting an inner pressure chamber 2 is arranged in the outer pressure chamber 1, the connecting seat 3 is provided with a surrounding structure 301 surrounding the outer side wall of the inner pressure chamber 2, a lower sealing gap is formed between the surrounding structure 301 and the inner pressure chamber 2, a lower sealing filler 7 is arranged in the lower sealing gap, and the lower sealing filler is tightly sealed by a lower pressure ring 5 surrounding the inner pressure chamber 2; the lower lamination ring 5 comprises an upwardly extending ring portion 502, and the ring portion 502 forms an upper sealing gap with the outer side wall of the internal pressure cavity 2, an upper layer sealing filler 6 is arranged in the upper sealing gap, and the upper layer sealing filler 6 is tightly pressed and sealed through the upper lamination ring 4.

According to the sealing structure disclosed by the embodiment, the lower-layer compression ring 5 is adopted to realize the compression sealing of the lower-layer sealing filler 7, and the upper-layer compression ring 4 is adopted to realize the compression sealing of the upper-layer sealing filler 6, so that the sealing connection between the inner pressure cavity 2 and the outer pressure cavity 1 can be realized under the combined action of the two layers of sealing structures; the thermal expansion displacement is satisfied, the integral sealing structure is simplified, and the installation construction and the subsequent disassembly and overhaul are facilitated.

The lower pressure ring 5 used in this embodiment is used to realize the compression seal of the lower sealing filler 7, and the lower pressure ring 5 may take various structural forms, which are not limited solely, and this embodiment is optimized and adopts one of the possible choices: as shown in fig. 3, the lower pressure ring 5 includes a connecting edge 501, a compression ring structure 503 extending toward the lower sealing gap is formed inside the connecting edge 501, a ring groove 504 is provided on the lower surface of the connecting edge 501, and a supporting protrusion 302 is provided on the connecting seat 3 corresponding to the ring groove 504. With such a scheme, the supporting protrusions 302 support the connection edge 501, so that the connection edge 501 is kept in a balanced and stable stress.

Preferably, the connecting edge 501 is a horizontal ring, the compression ring 503 is perpendicular to the connecting edge, and the ring groove 504 is disposed at a right angle between the compression structure and the connecting edge.

In order to ensure support stability, the structure of the supporting protrusion 302 may be configured in various ways, and is not limited to only one, and the present embodiment is optimized and adopts one of possible choices: the supporting protrusion 302 is in a convex ring shape. With such a scheme, the supporting boss 302 is integrally formed with the connection base 3.

After the lower pressure ring 5 is disposed, the structure for forming the upper sealing gap upwards can be various forms, and is not limited in particular, and this embodiment is optimized and adopts one of possible choices: the upwardly extending ring portion 502 is provided at the connecting rim portion 501. With this arrangement, the upwardly extending ring portion 502 is integrally formed with the connecting rim portion 501.

After setting the lower press ring 5, in order to ensure stable connection between the lower press ring 5 and the connection base 3, the connection can be reinforced in various ways, and this embodiment is optimized and adopts one of the possible options: the lower lamination ring 5 and the connecting seat 3 are fixedly connected through a fastener. With such an arrangement, the fastener may be a fastening bolt.

In carrying out the connection of the lower laminate ring 5 with the connection seat 3, various forms of connection structures can be provided, which are not exclusively limited, here optimized and one of the possible options is proposed: a plurality of connecting parts are arranged on the connecting seat 3 at intervals, and the fastening piece penetrates through the lower-layer pressing ring 5 and is in fastening connection with the connecting parts. When the scheme is adopted, the connecting parts are uniformly arranged at intervals along the circumferential surface.

The upper lamination ring 4 is also used for compression forming a seal, the specific structure of which is not limited only, and this embodiment is optimized and adopts one of the possible options: the upper laminate ring 4 includes a connecting rim 501, and a compression ring structure 503 extending toward the upper seal gap is formed on the inner side of the connecting rim 501. With this arrangement, the connecting lip 501 is integrally formed with the clamp ring structure 503.

Preferably, the connecting edge 501 of the upper laminate ring 4 is also a horizontal ring-shaped member, and the compression ring structure 503 is perpendicular to the connecting edge 501.

In this embodiment, the upper lamination ring 4 also ensures the reliability of the sealing structure by means of connection and fixation, and in particular, this embodiment is optimized and adopts one of the possible options: the upper lamination ring 4 is fixedly connected with the connecting seat 3 through a fastener. With such an arrangement, the fastener may be a bolt.

The connection of the upper laminate to the connection seat 3 can also be achieved by means of fasteners, which in this embodiment are optimized and one of the possible options is adopted: the connecting seat 3 is provided with a plurality of connecting parts at intervals, and the fastening piece penetrates through the upper lamination ring 4 and is fastened and connected with the connecting parts. With such a scheme, the connection parts of the upper lamination ring 4 and the lower lamination ring 5 respectively corresponding to each other are arranged at intervals, so that the interference between the upper lamination ring 4 and the lower lamination ring 5 is avoided.

For convenient maintenance and repair, the structures of the upper lamination ring 4 and the lower lamination ring 5 are optimized, and one of the possible options is adopted in the optimization of the embodiment: as shown in fig. 4 and 5, the upper lamination ring 4 and/or the lower lamination ring 5 each include a plurality of segment plates 401, and adjacent plates 401 are tightly fitted and connected and fastened through a step structure. When the scheme is adopted, the overall stability of the block pressing ring is improved, and the opening size of the maintenance structure is reduced. By providing the upper and/or lower laminate ring as several segments, installation and removal inside the pressure chamber is facilitated.

In the present embodiment, the structure of the connecting seat 3 is not limited only, but is optimized and one of the possible options is adopted in order to better accommodate the lower sealing filler 7: the surrounding structure 301 of the connecting seat 3 is provided with a step structure for containing the lower sealing filler 7, and the step structure faces the outer side wall of the internal pressure cavity 2 and forms a lower sealing gap. By adopting the scheme, the step structure changes the gap between the surrounding structure 301 and the outer side wall of the internal pressure cavity 2, so that more lower sealing filler 7 can be contained, and a more stable sealing structure is formed; while also allowing for greater assurance of thermal expansion displacement.

By adopting the scheme, the following effects can be achieved specifically:

1) The packing and related components are installed and disassembled in the equipment, and the equipment is only provided with a manhole with a common size, so that the complexity in the subsequent piping, equipment and civil engineering structural design is greatly reduced. Because the external single-layer packing seal structure has long extension length, the equipment height, the piping length, the structural load and the like are increased intangibly.

2) In order to ensure reliable sealing of the packing structure under limited bolt pretightening force, a double-layer packing sealing structure is arranged. The length of the sealing flow channel is increased by arranging the double-layer packing, namely, the resistance of medium flow is increased, compared with a single-layer packing sealing structure, the double-layer packing sealing structure can achieve better matching and balance between the pretightening force and the compression ring stress, namely, the compression ring stress cannot be excessively increased when the pretightening force is increased (more compression rings share the pretightening stress), and meanwhile, the corresponding medium flow resistance is increased along with the increase of the pretightening force.

3) In order to ensure sealing, the inner side of the lower packing press ring is provided with a ring groove, the equipment body is provided with a boss, the flow resistance of the medium is increased through dislocation baffling of the concave boss, and the flowing trend of the medium in the packing at the lower lamination ring is slowed down, so that the sealing reliability is improved.

4) In order to facilitate the internal operation, the upper and lower packing press rings are respectively provided with a concave surface and a convex surface, and the larger press ring is split into two or more pieces, so that the two packing press rings are convenient to enter and exit from a smaller manhole; one of the two adjacent blocks is concave, and the other block is convex, so that the circumferential stability of the compression ring is facilitated. The two compression rings are connected by adopting the fasteners at the joint, so that the overall stability of the two compression rings in the radial direction is improved.

5) The upper lamination ring fastener and the lower lamination ring fastener are arranged in a staggered manner, are respectively connected with the equipment body, and meanwhile, the second lamination ring is provided with the guide hole of the first lamination ring fastener.

6) The fastening piece and the two laminated rings are tightly pressed by adopting measures such as belleville springs, elastic washers, wedges and the like, so that the loosening phenomenon of the fastening force of the stud in the operation process can be effectively prevented.

The above is an embodiment exemplified in this example, but this example is not limited to the above-described alternative embodiments, and a person skilled in the art may obtain various other embodiments by any combination of the above-described embodiments, and any person may obtain various other embodiments in the light of this example. The above detailed description should not be construed as limiting the scope of the present embodiments, which is defined in the appended claims.

Claims (10)

1. Be fit for seal structure of multicavity room equipment, be applied to the annular seal department that inside and outside pressure chamber (1) nest set up, its characterized in that: a connecting seat (3) for connecting the internal pressure cavity (2) is arranged in the external pressure cavity (1), the connecting seat (3) is provided with a surrounding structure (301) surrounding the outer side wall of the internal pressure cavity (2), a lower sealing gap is formed between the surrounding structure (301) and the internal pressure cavity (2), a lower sealing filler (7) is arranged in the lower sealing gap, and the lower filler is tightly pressed and sealed through a lower pressing ring (5) surrounding the internal pressure cavity (2); the lower lamination ring (5) comprises an upwardly extending ring part (502), an upper sealing gap is formed between the ring part (502) and the outer side wall of the internal pressure cavity (2), an upper layer sealing filler (6) is arranged in the upper sealing gap, and the upper layer sealing filler (6) is tightly pressed and sealed through an upper layer pressing ring (4).

2. The sealing structure suitable for a multi-chamber apparatus according to claim 1, wherein: the lower lamination ring (5) comprises a connecting edge part (501), a compression ring structure (503) extending to a lower sealing gap is formed on the inner side of the connecting edge part (501), an annular groove (504) is formed on the lower surface of the connecting edge part (501), and a supporting protrusion (302) is arranged on the connecting seat (3) corresponding to the annular groove (504).

3. The sealing structure suitable for a multi-chamber apparatus according to claim 2, wherein: the supporting protrusion (302) is in a convex ring shape.

4. The sealing structure suitable for a multi-chamber apparatus according to claim 2, wherein: the ring part (502) extending upwards is arranged on the connecting edge part (501).

5. The sealing structure suitable for a multi-chamber apparatus according to any one of claims 1 to 4, wherein: the lower lamination ring (5) is fixedly connected with the connecting seat (3) through a fastener.

6. The sealing structure for a multi-chamber apparatus according to claim 5, wherein: a plurality of connecting parts are arranged on the connecting seat (3) at intervals, and a fastener penetrates through the lower lamination ring (5) and is in fastening connection with the connecting parts.

7. The sealing structure suitable for a multi-chamber apparatus according to claim 1, wherein: the upper pressure ring (4) comprises a connecting edge part (501), and a pressure ring structure (503) extending to an upper sealing gap is formed on the inner side of the connecting edge part (501).

8. The sealing structure for a multi-chamber apparatus according to claim 7, wherein: the upper pressure ring (4) is fixedly connected with the connecting seat (3) through a fastener.

9. The sealing structure for a multi-chamber apparatus according to claim 8, wherein: the connecting seat (3) is provided with a plurality of connecting parts at intervals, and the fastening piece penetrates through the upper layer compression ring (4) and is in fastening connection with the connecting parts.

10. The sealing structure suitable for a multi-chamber apparatus according to claim 1, wherein: the upper layer pressing ring (4) and/or the lower layer pressing ring (5) comprise a plurality of pressing pieces (401), and adjacent pressing pieces (401) are in press fit and connected and fastened through a step structure.