CN209818970U - Flange with good sealing performance - Google Patents

Abstract

The utility model discloses a flange that leakproofness is good, its technical scheme main points include first flange and with the second flange of first flange coaxial arrangement, the middle part intercommunication of first flange and second flange just is formed with the passageway that is used for fixed outer pipeline, be equipped with the cross-section on the passageway and all be trapezoidal first sealed face and the sealed face of second, be equipped with the flange gasket of anticreep type between the sealed face of first sealed face and second, the flange gasket can produce distortion under the nip pressure of the sealed face of first sealed face and second to closely laminate first sealed face and the sealed face of second, one side of flange gasket is equipped with exhaust hole and external intercommunication, the utility model has the advantages of simple structure, reasonable in design, have sealed effectual, have wide market prospect.

Description

Flange with good sealing performance

Technical Field

The utility model relates to a flange field, more specifically says that it relates to a flange that the leakproofness is good.

Background

A flange, also known as a flange collar or flange. The flange is a part for connecting pipes, and is used for connecting pipe ends, in the prior art, the flange is widely applied to the pipeline industry without welding and sealing, but in the general pipeline connecting process, if the pipeline is not provided with the flange in advance, the connection is difficult, so the connection is difficult, and the leakage is easy to occur.

The utility model discloses a do not weld sealing flange for prior art publication number CN202852260U, including the ring flange, its characterized in that: the flange plate is characterized in that a through hole is formed in the middle of the flange plate, step grooves are formed in the periphery of the through hole, flat gaskets are arranged at the bottoms of the step grooves, and pressure check rings are arranged in the step grooves.

Although the above-mentioned publication can solve and avoid the leakage at the pipe joint to a certain extent, the temperature and pressure of the medium inside the flange often easily change, the higher temperature makes the bolt expand and extend by heating, the sealing system relaxes, the gasket does not have enough resilience to continue to keep the tight fit with the flange sealing surface, the high-temperature and high-pressure medium flows to the outside of the flange through the sealing surface, and moreover, under the working conditions that the high temperature and the high pressure simultaneously bear the impact, the alternating load and the thermal cycle, the sealing effect of the common sealing element cannot be guaranteed due to the material deterioration and the structure relaxation.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model discloses lie in providing a flange that the leakproofness is good to solve among the prior art not good problem of sealed effect.

In order to achieve the above purpose, the utility model provides a following technical scheme: the flange with good sealing performance comprises a first flange and a second flange which is coaxially arranged with the first flange, the middle parts of the first flange and the second flange are communicated and form a channel for fixing an outer pipeline, a first sealing surface and a second sealing surface which are trapezoidal in cross section are arranged on the channel, an anti-falling flange gasket is arranged between the first sealing surface and the second sealing surface, the flange gasket can generate torsional deformation under the clamping pressure of the first sealing surface and the second sealing surface and is tightly attached to the first sealing surface and the second sealing surface, and an exhaust hole is formed in one side of the flange gasket and is communicated with the outside.

By adopting the technical scheme, the first flange is connected with one conveying pipe, the second flange is connected with the second conveying pipe, the first flange and the first flange are coaxially arranged and are connected through bolts, the middle parts of the first flange and the second flange are communicated and are provided with channels for fixing an outer pipeline so as to connect the two conveying pipes, the flanges can be adopted to connect a plurality of conveying pipes according to the requirement to meet the use requirement, the first sealing surface and the second sealing surface are arranged to fix the flange gasket, the first sealing surface and the first flange are integrally formed or combined and connected, the second sealing surface and the second flange are integrally formed or combined and connected, after the sealing surface of the flange is contacted with the flange gasket, a force is applied to the flange gasket by further matching, so that the flange gasket generates torsional deformation to form a torque action until the flange gasket is tightly attached to the conical surface of the flange. When sealing system lax back, the flange gasket has the antitorque distortion, resumes the trend of original shape, will resume original flat bed structure to show higher resilience, continue to keep with the inseparable laminating of flange seal face, form effectual sealed all the time, the problem of the inflation of being heated because of having the space between wainscot portion and the flange has been solved in the setting of exhaust hole, and the linear type design makes debris or the foul that gets into in its exhaust hole taken out very easily, need not change the flange, practiced thrift the cost.

The utility model discloses further set up to: the flange gasket comprises an annular soft base body and a metal coating coated on the outer surface of the annular soft base body.

Through adopting above-mentioned technical scheme, because metal coating and flange surface contact time, can highly compress the soft base member of inside, can effectively improve the resilience performance nature of gasket, and metal coating can provide better intensity and support.

The utility model discloses further set up to: the metal coating is including first corrugated metal plate and second corrugated metal plate, first corrugated metal plate with second corrugated metal plate stack and form cyclic annular in order to coat soft base member surface.

By adopting the technical scheme, the crest part on the first corrugated metal plate and the trough part on the second corrugated metal plate are coincided, stacked and fixedly connected, and the crest part and the trough part are stacked and fixedly connected, so that the sealing can be formed on the soft substrate inside as much as possible, and the leakage is slowed down or even eliminated.

The utility model discloses further set up to: the flange section of first flange and second flange is equipped with a plurality of mounting holes, the exhaust hole is used for intercommunication mounting hole and flange gasket, the tip in exhaust hole is located the middle part of mounting hole.

Through adopting above-mentioned technical scheme, first flange and second flange pass through bolted connection, convenient to detach and maintenance.

The utility model discloses further set up to: the first sealing surface and the second sealing surface are symmetrically arranged, and pressure check rings are arranged at the end parts of the first sealing surface and the second sealing surface.

Through adopting above-mentioned technical scheme, the tip of first sealed face and second sealed face is equipped with the pressure retaining ring, is convenient for compress tightly the flange gasket.

The utility model discloses further set up to: all be equipped with on first flange and the second flange and take neck section and flange section, take neck section and flange section to pass through the arc transition face and connect, and have a plurality of strengthening ribs that extend to and take neck section terminal surface on the arc transition face.

Through adopting above-mentioned technical scheme, take neck section and flange section to pass through the arc transition face and connect, strengthened the structural strength of junction. And have a plurality of strengthening ribs that extend to the terminal surface of taking the neck section on the arc transition face, such design has further strengthened the structural strength who takes the neck section, can use in the connection of great intensity torsion part.

The utility model discloses following beneficial effect has: the pairing structure of sealed face can apply for a torsion of flange gasket, and the reaction force of turning round of flange gasket then shows the improvement for resilience ability to gain good enhancement sealing performance, after sealing system relaxs, the flange gasket has sufficient resilience to continue to keep with the inseparable laminating of the sealed face of flange, thereby guarantees the leakproofness, secondly, has solved because of having the space between wainscot part and the flange problem of thermal expansion through setting up in exhaust hole, and sealing performance is stable.

Drawings

FIG. 1 is a schematic diagram of a prior art structure in this embodiment;

FIG. 2 is a schematic view showing the structure of the present embodiment;

FIG. 3 is a schematic view showing the structure of the flange gasket according to the present embodiment.

Reference numerals: 1. a channel; 2. mounting holes; 3. an exhaust hole; 4. a first flange; 5. a second flange; 6. a second sealing surface; 7. a first sealing surface; 8. a flange gasket; 81. a metal coating; 82. a flexible substrate; 811. a first corrugated metal plate; 812. and a second corrugated metal plate.

Detailed Description

In order to make the technical solutions of the present invention better understood, the following detailed description of the present invention is provided with reference to the accompanying drawings and specific embodiments, and it should be noted that the embodiments and features of the embodiments of the present invention can be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; 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.

The embodiment discloses a flange with good sealing performance, as shown in fig. 1 and fig. 2, comprising a first flange 4 and a second flange 5 coaxially arranged with the first flange 4, wherein the middle parts of the first flange 4 and the second flange 5 are communicated and are provided with a channel 1 for fixing an external pipeline, two flanges are butted to communicate a plurality of external pipes to achieve a transmission effect, the channel 1 is provided with a first sealing surface 7 and a second sealing surface 6 which are both trapezoidal in cross section, the first sealing surface 7 and the second sealing surface 6 are both used for fixing a flange gasket 8, the sealing surfaces are both trapezoidal and similar to a stepped groove, a good sealing effect can be achieved on the flange gasket 8, a plurality of mounting holes 2 are arranged on the flange sections of the first flange 4 and the second flange 5, the mounting holes 2 can be arranged at equal angles, the preferred number is 6, the connection is stable, vent holes 3 are used for communicating with the outside, the tip in exhaust hole 3 is located the middle part of mounting hole 2, the sealed face of first sealed 7 and the sealed 6 symmetrical arrangement of second, and the tip of the sealed face of first sealed 7 and second 6 is equipped with the pressure retaining ring, the pressure retaining ring supports the top at the sealed face of first sealed 7 and second 6, all be equipped with on first flange 4 and the second flange 5 and take neck section and flange section, take neck section and flange section to pass through the arc transition surface and connect, and have a plurality of strengthening ribs that extend to and take neck section terminal surface on the arc transition surface.

As shown in fig. 2 and 3, a drop-proof flange gasket 8 is disposed between the first sealing surface 7 and the second sealing surface 6, the flange gasket 8 includes a ring-shaped flexible substrate 82 and a metal coating 81 coated on the outer surface of the flexible substrate, the metal coating 81 is made of carbon steel, nickel alloy and titanium alloy, the flexible substrate 82 is made of flexible graphite or polytetrafluoroethylene, the metal coating 81 includes a first corrugated metal plate 811 and a second corrugated metal plate 812, the first corrugated metal plate 811 and the second corrugated metal plate 812 are laminated to form a ring shape to coat the outer surface of the flexible substrate 82, and the thickness of the metal coating 81 is less than 0.4 mm. In this thickness range, both guaranteed good ductility and crookedness, also can provide better intensity and support, flange gasket 8 can produce distortion under the clamp-on of first sealed face 7 and the sealed face 6 of second to closely laminate first sealed face 7 and the sealed face 6 of second, one side of flange gasket 8 is equipped with exhaust hole 3 and communicates with the external world.

In the practical use process, the outer pipeline swimsuit transmits media, but when the working conditions are harsh, such as under the conditions of high temperature and high pressure, the common sealing system cannot meet the sealing effect, for example, the sealing surface in fig. 1 is a plane, while the sealing surface in the application is an inclined surface. After the inclined plane sealing surface of the flange is contacted with the flange gasket 8, a force is applied to the flange gasket 8 by further matching, so that the flange gasket 8 generates torsional deformation to form a torque action until the flange gasket 8 is tightly attached to the inclined plane of the flange. When the sealing system is relaxed, the flange gasket 8 has the tendency of reverse torsional deformation and recovery of original shape, and the original flat gasket structure needs to be recovered, so that higher resilience is shown, the flange gasket is continuously kept to be tightly attached to the flange sealing surface, and effective sealing is always formed. The conventional gasket with the structure shown in fig. 1 has limited elasticity due to the resilience of the material of the flange gasket 8 after the sealing system is loosened, and in addition, the function of the performance of the flange gasket 8 in the sealing effect is not negligible, and the two side edges of the first corrugated metal plate 811 and the second corrugated metal plate 812 are connected into a whole to form a ring. When the corrugated metal coating 81 is in contact with the surface of the flange, the flexible substrate 82 in the inner part can be highly compressed and enclosed in an annular closed space formed between the metal coating 81 and the flange surface, so that the corrugated metal coating has particularly excellent sealing property and rebound resilience, and the sealing property is further improved.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims (6)

1. The utility model provides a flange that leakproofness is good which characterized in that: the anti-dropping flange sealing device comprises a first flange (4) and a second flange (5) which is coaxially arranged with the first flange (4), wherein the middle parts of the first flange (4) and the second flange (5) are communicated and are provided with a channel (1) for fixing an outer pipeline, a first sealing surface (7) and a second sealing surface (6) with trapezoidal cross sections are arranged on the channel (1), an anti-dropping flange gasket (8) is arranged between the first sealing surface (7) and the second sealing surface (6), the flange gasket (8) can generate distortion under the clamping pressure of the first sealing surface (7) and the second sealing surface (6) and tightly fit the first sealing surface (7) and the second sealing surface (6), and one side of the flange gasket (8) is provided with an exhaust hole (3) and is communicated with the outside.

2. The flange with good sealing performance as claimed in claim 1, wherein: the flange gasket (8) comprises an annular soft base body (82) and a metal coating (81) coated on the outer surface of the annular soft base body.

3. The flange with good sealing performance as claimed in claim 2, wherein: metal coating (81) including first corrugated metal plate (811) and second corrugated metal plate (812), first corrugated metal plate (811) with second corrugated metal plate (812) stack and form cyclic annular cladding with soft base member (82) surface.

4. The flange with good sealing performance as claimed in claim 1, wherein: the flange section of first flange (4) and second flange (5) is equipped with a plurality of mounting holes (2), exhaust hole (3) are used for intercommunication mounting hole (2) and flange gasket (8), the tip in exhaust hole (3) is located the middle part of mounting hole (2).

5. The flange with good sealing performance as claimed in claim 1, wherein: the first sealing surface (7) and the second sealing surface (6) are symmetrically arranged, and pressure check rings are arranged at the ends of the first sealing surface (7) and the second sealing surface (6).

6. The flange with good sealing performance as claimed in claim 1, wherein: all be equipped with on first flange (4) and second flange (5) and take neck section and flange section, take neck section and flange section to pass through the arc transition face and connect, and have a plurality of strengthening ribs that extend to and take neck section terminal surface on the arc transition face.