CN220668360U

CN220668360U - Flange sealing device

Info

Publication number: CN220668360U
Application number: CN202322420829.4U
Authority: CN
Inventors: 李军刚; 刘双伟; 蒋光强; 杜锋辉; 周忠泽; 范洪兴; 艾海提江·买买提; 郝健坤; 宋小明
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2023-09-06
Filing date: 2023-09-06
Publication date: 2024-03-26
Anticipated expiration: 2033-09-06

Abstract

The utility model discloses a flange sealing device, which comprises a first flange and a second flange, wherein the first flange and the second flange are connected through a connecting device, a flange gasket groove is formed in the first flange and the second flange, the flange gasket grooves in the first flange and the second flange are combined to form a gasket groove, a sealing ring is arranged on the outer side of a designed gasket, and a gasket assembly is arranged between the upper flange and the lower flange and fastened through the connecting device. When fluid meets the backing ring, the sealing ring drives the backing ring to carry out floating sealing; when pressure is gradually increased, the backing ring metal body is expanded under pressure, the backing ring groove is compressed, sealing is enhanced, sealing assisting effect is generated, flange plane sealing is achieved, installation and maintenance are simple, bolt screwing torque is low, the backing ring can be repeatedly used, a dust-proof ring is arranged between the first sealing ring and the second sealing ring, dust-proof effect is achieved, and pressure balance holes are formed in the backing ring body, so that the upper pressure and the lower pressure of the backing ring are consistent.

Description

Flange sealing device

Technical Field

The utility model relates to the technical field of flange sealing, in particular to a flange sealing device.

Background

API grommet sealing flanges are currently used in well control equipment. Wherein the BX-type backing ring cannot be reused once used; BX backing rings are soft in material and gradually deform plastically along with the passage of time, so that leakage failure is caused, and serious consequences such as blowout are caused; the bolts also need to be fastened regularly; the backing ring is easy to damage, and the transportation and storage costs are high.

The existing API backing ring groove has higher repairing cost and is easy to cause indentation damage; the field bolt is pre-tightened, the torque requirement is high, and the equipment is complex and not easy to carry; meanwhile, the torque of the bolt is inconsistent due to different thread machining precision, materials and components of lubricating grease, and the conditions of rust and the like of the on-site bolt are difficult to avoid. Often resulting in failure service. The safety and reliability of equipment are affected, and no simple and effective solution is available at present.

1 patent was retrieved by the "floating seal grommet" keyword: CN209146325U is a floating seal ring with good sealing performance, which mainly consists of a floating seal ring and a moving shaft, and mainly solves the axial floating seal problem of the shaft. The 1 patent searched cannot realize the static seal of the high-pressure flange on the plane, does not have a metal framework and does not have the function of a dust ring; nor can the bolt torque problem be reduced; the problem that the API backing ring is deformed during vibration of the drilling machine can not be solved.

Disclosure of Invention

The utility model aims to provide a flange sealing device, which is used for overcoming the defects that in the prior art, the repairing cost of an API backing ring groove is high and indentation damage is easy to cause; the field bolt is pre-tightened, the torque requirement is higher, and the equipment is complex and is not easy to carry.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a flange sealing device, includes first flange and second flange, first flange and second flange pass through connecting device and connect, be provided with the flange ring groove that fills up on first flange and the second flange, the combination of the flange ring groove on first flange and the second flange forms the ring groove that fills up, be provided with the backing ring in the ring groove that fills up, the backing ring includes backing ring body and sets up first sealing washer and second sealing washer on the backing ring body.

Preferably, a dust-proof ring is arranged between the first sealing ring and the second sealing ring.

Preferably, the first sealing ring and the second sealing ring are symmetrically arranged on two sides of the dust-proof ring.

Preferably, the backing ring body is provided with a pressure balance hole.

Preferably, the first flange and the second flange are provided with flange gasket grooves with equal sizes.

Preferably, the connection means is a bolt or a jackscrew.

Preferably, the first sealing ring and the second sealing ring are identical in shape and size.

Preferably, the number of the first sealing rings and the second sealing rings is one or more.

Preferably, the grommet groove cross-sectional area is greater than the grommet cross-sectional area.

Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a flange sealing device, which is characterized in that a gasket ring groove is designed on a flange, a gasket ring is installed in the flange, a sealing ring is arranged on the outer side of the designed gasket ring, and a gasket ring assembly is installed between an upper flange and a lower flange and fastened through a connecting device. When fluid meets the backing ring, the sealing ring drives the backing ring to carry out floating sealing; when the pressure is gradually increased, the metal body of the backing ring is expanded under pressure, the backing ring groove is pressed, the sealing is enhanced, the sealing assisting effect is generated, the flange plane sealing is realized, the installation and maintenance are simple, the fastening torque of the bolt is low, and the backing ring can be reused.

Further, be provided with the dust ring between first sealing washer and the second sealing washer, realized dustproof effect.

Further, the pressure balance holes are formed in the backing ring body, so that the upper pressure and the lower pressure of the backing ring are consistent.

Drawings

FIG. 1 is a schematic diagram illustrating the operation of a flange seal according to the present utility model;

FIG. 2 is a semi-sectional view of a flange seal assembly according to the present utility model;

FIG. 3 is a schematic diagram of a novel flange gasket ring pressure balance hole structure according to the present utility model;

FIG. 4 is a schematic view of a novel flange gasket ring groove of the present utility model;

in the figure: 1-backing ring, 2-first flange, 3-second flange, 201-flange body, 202-flange backing ring groove, 4-connecting device, 101-backing ring body, 102-first sealing ring, 104-second sealing ring, 103-dust ring, 105-pressure balance hole.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model 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 utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the embodiments of the present utility model, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

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

The utility model is described in further detail below with reference to the attached drawing figures:

the utility model provides a flange sealing device as shown in fig. 1, which comprises a first flange 2 and a second flange 3, wherein the first flange 2 and the second flange 3 are connected through a connecting device 4, a flange gasket groove is formed in the first flange 2 and the second flange 3, the flange gasket grooves in the first flange 2 and the second flange 3 are combined to form a gasket groove, a gasket 1 is arranged in the gasket groove, and the gasket 1 comprises a gasket body 101, and a first sealing ring 102 and a second sealing ring 104 which are arranged on the gasket body 101.

Still another embodiment of the present utility model provides a flange sealing device, including a first flange 2 and a second flange 3, where the first flange 2 and the second flange 3 are connected by a connecting device 4, a flange gasket groove is provided on the first flange 2 and the second flange 3, the flange gasket grooves on the first flange 2 and the second flange 3 are combined to form a gasket groove, a gasket 1 is provided in the gasket groove, and the gasket 1 includes a gasket body 101, and a first sealing ring 102 and a second sealing ring 104 provided on the gasket body 101.

A dust-proof ring 103 is arranged between the first sealing ring 102 and the second sealing ring 104.

The first sealing ring 102 and the second sealing ring 104 are symmetrically arranged on two sides of the dust-proof ring 103.

The grommet body 101 is provided with a pressure balance hole.

The first flange 2 and the second flange 3 are provided with flange gasket grooves with equal sizes.

The connecting device 4 adopts bolts or jackscrews.

The first seal 102 and the second seal 104 are identical in shape and size.

The number of first seal rings 102 and second seal rings 104 is one or more.

The cross-sectional area of the backing ring groove is larger than that of the backing ring 1.

The specific 2 flange sealing designs have the same backing ring groove, the backing ring 1 comprises a backing ring body 101 and two sealing rings, and the backing ring 1 is provided with a pressure balancing hole 105; the backing ring 1 can form effective sealing after being inserted into the flange backing ring groove; the 2 flanges are connected through connecting bolts; the dust ring prevents external dust, and the design does not need to bear pressure.

The sealing rings can be O-shaped sealing rings or sealing rings made of rubber materials with other shapes, and the number of the sealing rings can be designed into 1 or more channels; and the flange reserved API backing ring is used together with the novel flange sealing backing ring and the backing ring groove, or 2 or more novel flange sealing backing rings and backing ring grooves are used.

Working principle:

and a backing ring 1 is arranged between the upper flange and the lower flange, and is fastened through connecting bolts. When fluid meets the backing ring 1, the sealing ring drives the backing ring 1 to carry out floating sealing; when the pressure is gradually increased, the backing ring metal body is pressed and expanded to press the backing ring groove, so that the sealing is enhanced, and a sealing assisting effect is generated. When a group of sealing rings on the inner side are damaged, the pressure balance holes 105 are communicated with each other by up and down pressure, so that the cushion ring assembly is prevented from being pushed to move upwards or downwards by fluid pressure, and the cushion ring assembly expands outwards, and the cushion ring 1 is always in a floating sealing state; when the flange bolts are slightly stretched and a small gap exists between the flanges, the backing ring 1 has a certain gap up and down in the backing ring groove and can still float to keep sealing.

Although the embodiments of the present utility model have been described above with reference to the accompanying drawings, the present utility model is not limited to the above-described specific embodiments and application fields, which are merely illustrative, instructive, and not restrictive. Those skilled in the art, having the benefit of this disclosure, may make many forms without departing from the scope of the utility model as claimed.

Claims

1. The utility model provides a flange sealing device, its characterized in that includes first flange (2) and second flange (3), first flange (2) and second flange (3) are connected through connecting device (4), be provided with flange gasket annular on first flange (2) and second flange (3), the combination of flange gasket annular on first flange (2) and second flange (3) forms the gasket annular, be provided with backing ring (1) in the gasket annular, backing ring (1) include backing ring body (101) and first sealing washer (102) and second sealing washer (104) of setting on backing ring body (101).

2. A flange sealing arrangement according to claim 1, characterized in that a dust ring (103) is arranged between the first sealing ring (102) and the second sealing ring (104).

3. A flange sealing arrangement according to claim 1, characterized in that the first sealing ring (102) and the second sealing ring (104) are symmetrically arranged on both sides of the dust ring (103).

4. A flange sealing arrangement according to claim 1, characterized in that the grommet body (101) is provided with pressure balancing holes.

5. A flange sealing arrangement according to claim 1, characterized in that the first flange (2) and the second flange (3) are provided with flange gasket grooves of equal size.

6. A flange sealing arrangement according to claim 1, characterized in that the connection means (4) are bolts or jackscrews.

7. A flange sealing arrangement according to claim 1, characterized in that the first sealing ring (102) and the second sealing ring (104) are identical in shape and size.

8. A flange sealing arrangement according to claim 1, characterized in that the number of the first sealing ring (102) and the second sealing ring (104) is one or more.

9. A flange sealing arrangement according to claim 1, characterized in that the grommet groove cross-sectional area is larger than the grommet (1) cross-sectional area.