CN211398564U

CN211398564U - Double-sealing structure

Info

Publication number: CN211398564U
Application number: CN201922043784.7U
Authority: CN
Inventors: 聂众一; 高宇婷; 骆明华
Original assignee: Sichuan Juhesheng Electric Appliance Co ltd
Current assignee: Sichuan Juhesheng Electric Appliance Co ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-09-01
Anticipated expiration: 2029-11-22

Abstract

The utility model discloses a double-sealing structure, which comprises a self-sealing structure and a forced sealing structure, wherein the self-sealing structure comprises a sealing seat, a penetrating piece and an O-shaped rubber ring, a first groove is arranged in the sealing seat, the O-shaped rubber ring is arranged in the first groove, the penetrating piece penetrates through the sealing seat and is mutually matched with the sealing seat, and the O-shaped rubber ring arranged in the sealing seat is compressed to be deformed by the penetrating piece; force seal structure and include sealing ring, metal gasket and gland nut, sealing ring one end and penetration piece welding, the metal gasket is located between sealing ring and the seal receptacle, and gland nut includes the seal segment and screws up the section, and the seal segment is equipped with the internal thread, and the seal receptacle surface be equipped with interior screw-thread fit's external screw thread. The utility model discloses a forced seal has realized the double sealing structure who is applicable to the nipple of high temperature high pressure vessel or heavy-calibre pipeline with the compound mode of self sealss, and double sealing structure can form twice effectual seal structure, has improved the sealing reliability greatly.

Description

Double-sealing structure

Technical Field

The utility model relates to a high temperature high pressure seal technical field, the more specifically double containment structure that says so.

Background

In petrochemical industry, thermal power plants, thermal experimental facilities and other high-temperature and high-pressure containers of thermodynamic systems, an inserted electric heating element can be adopted for heating the medium in the container, the inserted electric heating element and the container are connected by adopting a screwed connection pipe, and the sealing mode is generally metal gasket forced sealing. In addition, in order to measure the temperature of the medium in the high-temperature high-pressure container or the large-diameter pipeline, an internal insertion type thermometer is adopted, the thermometer is also connected with the container or the pipeline through a screwed pipe, and the sealing mode is generally also realized through a metal gasket in a forced sealing mode.

Under the severe working load conditions of long-term high temperature and high pressure, temperature pressure fluctuation or circulation and the like, the single metal gasket forced sealing structure is often insufficient in sealing reliability, easy to generate leakage risk and seriously endanger the safe operation of a system.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a double containment structure, the utility model discloses a compulsory sealed and the compound mode of self sealss realized being applicable to the double track seal structure of the nipple of high temperature high pressure vessel or heavy-calibre pipeline, and double track seal structure can form the effectual seal structure of twice, has improved the sealing reliability greatly.

The purpose of the utility model is realized through the following technical scheme: a double-sealing structure comprises a self-sealing structure and a forced sealing structure, wherein the self-sealing structure comprises a sealing seat, a penetrating piece and an O-shaped rubber ring, a first groove is formed in the sealing seat, the O-shaped rubber ring is arranged in the first groove, the penetrating piece penetrates through the sealing seat and is matched with the sealing seat, and the O-shaped rubber ring arranged in the sealing seat is compressed to deform by the penetrating piece;

the forced sealing structure comprises a sealing ring, a metal pad and a compression nut, one end of the sealing ring is welded with the penetration piece, the metal pad is arranged between the sealing ring and the sealing seat, the compression nut comprises a sealing section and a screwing section, the sealing section is provided with an internal thread, and an external thread matched with the internal thread is arranged on the outer surface of the sealing seat.

Furthermore, both ends of the sealing ring are planes, one end of the sealing ring is in contact with the compression nut, and the other end of the sealing ring is in contact with the metal pad.

Furthermore, the metal pad is a metal flat pad, and the butt joint end face of the sealing seat and the metal pad is a plane.

Furthermore, the sealing ring and the end face of the sealing seat contacted with the metal pad are provided with a plurality of second grooves.

Further, the second recess is equipped with three, and the second recess is V type groove, the degree of depth in V type groove is 1mm, and the contained angle in V type groove is 40.

Furthermore, one end of the sealing ring is a plane, the other end of the metal ring is a conical surface, the plane end of the sealing ring is in contact with the compression nut, and the conical surface end of the sealing ring is in contact with the metal pad.

Furthermore, the metal pad is a metal lens pad, and the butt joint end face of the sealing seat and the metal pad is a conical surface.

Further, the surface of the metal lens pad is subjected to silver plating treatment.

Furthermore, the O-shaped rubber ring is made of one of ethylene propylene rubber, silicon rubber, fluorine rubber or perfluoro rubber.

The utility model has the advantages that:

1) the utility model discloses a forced seal has realized the double sealing structure who is applicable to the nipple of high temperature high pressure vessel or heavy-calibre pipeline with the compound mode of self sealss, double sealing structure can form twice effectual seal structure, the sealing reliability is greatly improved, its self sealss is through the size cooperation between the first recess in through-component and the seal receptacle, and the compression is located O type rubber circle in the first recess and is realized to warping, forced seal then is through gland nut, pretension load is applyed to sealing ring and seal receptacle, make the sealed face between metal pad and the seal receptacle and the sealed face contact between metal pad and the sealing ring and produce plastic deformation, reach the effect of forced seal.

2) The utility model discloses a seal structure's advantage still lies in that the forced seal of metal gasket applys the load and is provided by threaded connection, and pretension load is great, and the initial seal of O type rubber pad provides initial compression load by the rectangular channel of installation O type rubber pad and through-going piece, and medium pressure provides ultimate operating load when by operating condition, consequently O type rubber circle and metal gasket's atress, sealed opposition each other, each other do not influence.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

In the figure, 1-a sealing seat, 2-a penetrating piece, 3-an O-shaped rubber ring, 4-a sealing ring, 5-a metal pad and 6-a compression nut.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

The terms "parallel", "perpendicular", etc. do not require that the components be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel relative to "perpendicular," and does not mean that the structures are necessarily perfectly parallel, but may be slightly tilted.

The terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal, vertical or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

Furthermore, the terms "substantially", and the like are intended to indicate that the relative terms are not necessarily strictly required, but may have some deviation. For example: "substantially equal" does not merely mean absolute parallelism, and because absolute equality is difficult to achieve in actual production and operation, certain deviations generally exist. Thus, in addition to absolute equality, "substantially equal" also includes the above-described case where there is some deviation. In this case, unless otherwise specified, terms such as "substantially", and the like are used in a similar manner to those described above.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1, the utility model provides a technical scheme: a double-sealing structure comprises a self-sealing structure and a forced sealing structure, wherein the self-sealing structure comprises a sealing seat 1, a penetrating piece 2 and an O-shaped rubber ring 3, a first groove is formed in the sealing seat 1, the right angle of the first groove is provided with a fillet, the fillet can effectively prevent the O-shaped rubber ring 3 from being scratched when in compression deformation, the O-shaped rubber ring 3 is arranged in the first groove, the penetrating piece 2 penetrates through the sealing seat 1 and is matched with the sealing seat 1, the O-shaped rubber ring 3 arranged in the sealing seat 1 is compressed to be deformed by the penetrating piece 2, the self-sealing is realized by the size matching between the penetrating piece 2 and the first groove in the sealing seat 1 and the compression of the O-shaped rubber ring 3 arranged in the first groove to be deformed; the forced sealing structure comprises a sealing ring 4, a metal pad 5 and a compression nut 6, one end of the sealing ring 4 is welded with the penetrating piece 2, the welding end of the sealing ring 4 is in contact with the compression nut 6, the metal pad 5 is arranged between the sealing ring 4 and the sealing seat 1, the compression nut 6 comprises a sealing section and a screwing section, the sealing section is provided with an internal thread, an external thread matched with the internal thread is arranged on the outer surface of the sealing seat 1, and the forced sealing is realized by exerting a pre-tightening load through the compression nut 6, the sealing ring 4 and the sealing seat 1, so that a sealing surface between the metal pad 5 and the sealing seat 1 and a sealing surface between the metal pad 5 and the sealing ring 4 are in contact and generate plastic deformation, and the effect of forced sealing is achieved. The utility model discloses a forced seal has realized the double sealing structure who is applicable to the nipple of high temperature high pressure vessel or heavy-calibre pipeline with the compound mode of self sealss, and double sealing structure can form twice effectual seal structure, has improved the sealing reliability greatly.

Two ends of the sealing ring 4 are both planes, one end of the sealing ring 4 is in contact with the compression nut 6, and the other end of the sealing ring 4 is in contact with the metal pad 5. The metal gasket 5 generates plastic deformation at the contact part of the sealing surface of the sealing seat and the sealing surface of the sealing ring 4 by applying a pre-tightening load through the compression nut 6, the sealing ring 4 and the sealing seat 1, so that the effect of forced sealing is achieved.

The metal pad 5 is a metal flat pad, and the butt joint end face of the sealing seat 1 and the metal pad 5 is a plane. The sealing ring 4 and the end face of the sealing seat 1 contacted with the metal pad 5 are provided with a plurality of second grooves. The second recess is equipped with three, and the second recess is V type groove, the degree of depth in V type groove is 1mm, and the contained angle in V type groove is 40. Because the metal pad 5 adopts the metal flat gasket, then the metal pad 5 and sealing ring 4 and the face-to-face contact of seal receptacle 1 contact form for the plane end, so compress tightly sealed effect not good, when addding a plurality of V type grooves, change original face-to-face contact mode, effectual sealing performance that has strengthened improves sealed reliability.

The O-shaped rubber ring 3 is made of one of ethylene propylene rubber, silicon rubber, fluorine rubber or perfluoro rubber. The material of the O-ring 3 can be selected according to the type of the medium, the pressure, the temperature, and other conditions.

Example 2

Referring to fig. 2, the utility model provides a technical scheme: a double-sealing structure comprises a self-sealing structure and a forced sealing structure, wherein the self-sealing structure comprises a sealing seat 1, a penetrating piece 2 and an O-shaped rubber ring 3, a first groove is formed in the sealing seat 1, the right angle of the first groove is provided with a fillet, the fillet can effectively prevent the O-shaped rubber ring 3 from being scratched when in compression deformation, the O-shaped rubber ring 3 is arranged in the first groove, the penetrating piece 2 penetrates through the sealing seat 1 and is matched with the sealing seat 1, the O-shaped rubber ring 3 arranged in the sealing seat 1 is compressed to be deformed by the penetrating piece 2, the self-sealing is realized by the size matching between the penetrating piece 2 and the first groove in the sealing seat 1 and the compression of the O-shaped rubber ring 3 arranged in the first groove to be deformed; the forced sealing structure comprises a sealing ring 4, a metal pad 5 and a compression nut 6, one end of the sealing ring 4 is welded with the penetrating piece 2, the welding end of the sealing ring 4 is in contact with the compression nut 6, the metal pad 5 is arranged between the sealing ring 4 and the sealing seat 1, the compression nut 6 comprises a sealing section and a screwing section, the sealing section is provided with an internal thread, an external thread matched with the internal thread is arranged on the outer surface of the sealing seat 1, and the forced sealing is realized by exerting a pre-tightening load through the compression nut 6, the sealing ring 4 and the sealing seat 1, so that a sealing surface between the metal pad 5 and the sealing seat 1 and a sealing surface between the metal pad 5 and the sealing ring 4 are in contact and generate plastic deformation, and the effect of forced sealing is achieved. The utility model discloses a forced seal has realized the double sealing structure who is applicable to the nipple of high temperature high pressure vessel or heavy-calibre pipeline with the compound mode of self sealss, and double sealing structure can form twice effectual seal structure, has improved the sealing reliability greatly.

One end of the sealing ring 4 is a plane, the other end of the metal ring is a conical surface, the plane end of the sealing ring 4 is in contact with the compression nut 6, and the conical surface end of the sealing ring 4 is in contact with the metal pad 5. And a pre-tightening load is applied through the compression nut 6, the sealing ring 4 and the sealing seat 1, so that sealing is realized.

The metal gasket 5 is a metal lens gasket, the butt joint end face of the sealing seat 1 and the metal gasket 5 is a plane, the metal lens gasket is a gasket with a conical surface, and the conical surface of the metal lens gasket and the conical surface of the sealing ring 4 can be adjusted to be an optimal conical surface and the matching surface of the conical surface under the action of the compression nut 6, so that sealing is realized. The silver plating treatment is carried out on the surface of the metal lens pad, so that the sealing performance between the sealing ring and the metal lens pad can be further enhanced through the silver plating treatment, and the sealing reliability is improved.

The utility model discloses an installation method step as follows:

firstly, a through hole slightly larger than a sealing seat 1 is formed in a container wall needing to be perforated, then the sealing seat 1 is fixedly connected with the container wall in a welding mode, a threaded end is arranged outwards, a threaded end which is not arranged is welded with the container wall, butt joint is realized by matching internal threads of a compression nut 6 with external threads of the sealing seat 1, and a penetrating piece 2 is fixed on the sealing seat 1; the O-shaped rubber ring 3 is extruded by utilizing the size matching between the penetrating piece 2 and the sealing seat 1 to realize self-sealing, and then the compression nut 6 is utilized to apply preload to enable the sealing ring 4, the metal pad 5 and the sealing seat 1 to be mutually extruded and generate plastic deformation, so that forced sealing is realized.

The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. A dual seal structure characterized by: the self-sealing structure comprises a self-sealing structure and a forced sealing structure, wherein the self-sealing structure comprises a sealing seat (1), a penetrating piece (2) and an O-shaped rubber ring (3), a first groove is formed in the sealing seat (1), the O-shaped rubber ring (3) is arranged in the first groove, the penetrating piece (2) penetrates through the sealing seat (1) and is matched with the sealing seat (1), and the O-shaped rubber ring (3) arranged in the sealing seat (1) is compressed to deform by the penetrating piece (2);

force seal structure include sealing ring (4), metal pad (5) and gland nut (6), sealing ring (4) one end with penetration piece (2) welding, metal pad (5) are located sealing ring (4) with between seal receptacle (1), gland nut (6) are including seal segment and screw up the section, the seal segment is equipped with the internal thread, seal receptacle (1) surface be equipped with interior screw-thread fit's external screw thread.

2. The dual sealing structure of claim 1 wherein: the two ends of the sealing ring (4) are planes, one end of the sealing ring (4) is in contact with the compression nut (6), and the other end of the sealing ring (4) is in contact with the metal pad (5).

3. A dual sealing structure according to claim 2, wherein: the metal gasket (5) is a metal flat gasket, and the butt joint end face of the sealing seat (1) and the metal gasket (5) is a plane.

4. A dual sealing structure according to claim 3, wherein: the sealing ring (4) and the end face of the sealing seat (1) contacted with the metal pad (5) are provided with a plurality of second grooves.

5. The dual sealing structure of claim 4 wherein: the second recess is equipped with three, and the second recess is V type groove, the degree of depth in V type groove is 1mm, and the contained angle in V type groove is 40.

6. The dual sealing structure of claim 1 wherein: one end of the sealing ring (4) is a plane, the other end of the metal ring is a conical surface, the plane end of the sealing ring (4) is in contact with the compression nut (6), and the conical surface end of the sealing ring (4) is in contact with the metal pad (5).

7. The dual sealing structure of claim 6 wherein: the metal gasket (5) is a metal lens gasket, and the butt joint end face of the sealing seat (1) and the metal gasket (5) is a conical surface.

8. The dual sealing structure of claim 7 wherein: and performing silver plating treatment on the surface of the metal lens pad.

9. The dual sealing structure of claim 1 wherein: and the right angle of each first groove is rounded.

10. The dual sealing structure of claim 1 wherein: the O-shaped rubber ring (3) is made of one of ethylene propylene rubber, silicon rubber, fluorine rubber or perfluoro rubber.