CN221569444U - Metal elastic sealing bidirectional pressure-bearing triple offset butterfly valve - Google Patents

Abstract

The application relates to the technical field of valves and discloses a metal elastic sealing bidirectional pressure-bearing triple offset butterfly valve which comprises a valve body, a valve seat, a valve shaft, a valve plate, a compression ring flange and a metal elastic sealing ring. In the use process, when the valve is in a fully closed state, a medium can enter the bending part of the metal elastic sealing ring through the flow hole. And then under the pressure action of the medium, the bending part of the metal elastic sealing ring can deform, so that the bending part of the metal elastic sealing ring expands outwards. Therefore, the sealing pair can be always propped against the edge of the valve plate to form a sealing pair, and the effect of auxiliary sealing by pressure is realized. Because the bending part of the metal elastic sealing ring can deform, the sealing surface can not be influenced by thermal expansion and cold contraction, and when the thermal expansion and cold contraction generate micro deformation, the bending part of the metal elastic sealing ring can automatically perform sealing pressure compensation according to the characteristic of elastic compensation, so that the valve is stable and reliable in operation, and the service life of the valve is prolonged.

Description

Metal elastic sealing bidirectional pressure-bearing triple offset butterfly valve

Technical Field

The application relates to the technical field of valves, in particular to a metal elastic sealing bidirectional pressure-bearing triple offset butterfly valve.

Background

At present, the triple eccentric hard sealing butterfly valve is widely applied to metallurgical, electric power, petrochemical industry, water supply and drainage, municipal construction and other industrial pipelines with medium temperature less than or equal to 425 ℃ for flow regulation and fluid interception. The butterfly plate of the existing three-eccentric hard seal butterfly valve is arranged in the diameter direction of a pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0 and 90 degrees. When the valve rotates to 90 degrees, the valve is in a full-open state; when the valve rotates to 0 degrees, the valve is in a fully closed state.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

The existing three-eccentric hard sealing butterfly valve is divided into a multi-layer soft and hard stacked sealing ring and a metal hard collision hard sealing structure. The sealing ring of the multi-layer soft and hard stacked sealing butterfly valve is fixed on the valve plate, when the valve plate is in a normally open state, the medium forms positive flushing on the sealing surface of the valve plate, and after the soft sealing band in the metal sheet interlayer is flushed, the sealing performance is directly affected, so that the service life is lower. The valve plate and the sealing surface of the valve seat of the metal hard-touch hard-seal triple eccentric butterfly valve are of inclined cone structures, temperature-resistant and corrosion-resistant alloy materials are deposited on the inclined cone surface of the valve plate, springs fixed between the pressure plates of the adjusting rings are assembled with adjusting bolts on the pressure plates, the valve is sealed by extruding the valve plate and the valve seat, the valve opening and closing torque is large, the valve is easily opened and closed for a long time, the sealing surface is worn, the sealing performance is unstable due to the condition of thermal expansion and contraction of medium temperature, and the service life is low.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of utility model

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a metal elastic sealing bidirectional pressure-bearing triple offset butterfly valve, so as to prolong the service life of the valve.

In some embodiments, the metal elastic sealing bidirectional pressure bearing triple offset butterfly valve comprises: a valve body; a valve seat mounted inside the valve body; the valve shaft is rotatably arranged on the valve body and penetrates through the valve seat; the valve plate is arranged on the valve shaft and positioned in the valve seat, and a gap is formed between the valve plate and the valve seat; the compression ring flange is detachably arranged on the valve seat and comprises a flow hole, and the flow hole is used for passing through a medium; the metal elastic sealing ring comprises a ring plate part and a bending part which are connected, the bending part is positioned at the inner side of the ring plate part to form a structure with a fishhook-shaped cross section, the ring plate part is arranged between the valve seat and the pressure ring flange, and the bending part is positioned at a gap formed by the valve plate and the valve seat; the medium enters the bending part through the flow hole, and the bending part is outwards expanded under the pressure action of the medium until the medium abuts against the edge of the valve plate to form a seal.

Optionally, the pressure ring flange further comprises: the circulating holes are uniformly distributed around the flange.

Optionally, the pressure ring flange further comprises: the first annular groove is positioned on the inner side surface of the flange plate; wherein, the edge of the bending part is propped against the groove bottom of the first annular groove.

Optionally, the method further comprises: the bolts are arranged among the valve seat, the annular plate part and the flange plate; the valve seat comprises a threaded hole, the annular plate part comprises a through hole, the flange plate comprises a mounting hole, and the bolt is arranged in the through hole in a penetrating manner after being arranged in the mounting hole and is in threaded connection with the threaded hole.

Optionally, the valve seat further comprises: the second annular groove is positioned on the inner side surface of the valve seat; wherein the curved portion is received into the second annular groove after the annular plate portion is mounted between the valve seat and the press ring flange.

Optionally, the valve plate includes: a connecting portion connected to the valve shaft; the round platform part is connected with the connecting part; wherein, the bending part is propped against the side surface of the round platform part.

Optionally, the method further comprises: and the first sealing ring is arranged between the valve seat and the annular plate part and is used for reinforcing sealing.

Optionally, the method further comprises: and the second sealing ring is arranged between the pressure ring flange and the annular plate part and used for reinforcing sealing.

Optionally, the method further comprises: and the valve packing is arranged between the valve body and the valve shaft and used for reinforcing sealing.

The metal elastic sealing bidirectional pressure-bearing triple offset butterfly valve provided by the embodiment of the disclosure can realize the following technical effects:

The embodiment of the disclosure provides a metal elastic sealing bidirectional pressure-bearing triple offset butterfly valve, which comprises a valve body, a valve seat, a valve shaft, a valve plate, a compression ring flange and a metal elastic sealing ring. The valve seat is arranged in the valve body and is used for forming a sealing pair. The valve shaft is rotatably arranged on the valve body and penetrates through the valve seat, and can do rotary motion relative to the valve body and the valve seat. The valve plate is arranged on the valve shaft and positioned in the valve seat, and is driven by the valve plate to rotate, and the rotation angle is 0-90 degrees. The valve is in a fully opened state when rotating to 90 degrees, and is in a fully closed state when rotating to 0 degrees. A gap is formed between the valve plate and the valve seat so that the valve plate can rotate in the valve seat. The compression ring flange is detachably arranged on the valve seat and used for compressing and fixing the metal elastic sealing ring. The press ring flange comprises a flow opening for the passage of a medium. The metal elastic sealing ring comprises a ring plate part and a bending part which are connected, the material adopts a high-performance nickel-chromium alloy Inconel625 plate, the thickness is 1-2 mm, and the metal elastic sealing ring is formed by rolling through a special die. The inner side of the bending part forms a structure with a fishhook-shaped cross section, and the torque of the valve when the valve is opened or closed is reduced through the sealing ring with a specific structure. The annular plate part is arranged between the valve seat and the compression ring flange, and the bending part is positioned at a gap formed by the valve plate and the valve seat and is used for sealing the gap. The medium enters the bending part through the flow hole, and the bending part is outwards expanded under the pressure action of the medium until the bending part abuts against the edge of the valve plate to form a seal.

In the use process, when the valve is in a fully closed state, a medium can enter the bending part of the metal elastic sealing ring through the flow hole. And then under the pressure action of the medium, the bending part of the metal elastic sealing ring can deform, so that the bending part of the metal elastic sealing ring expands outwards. Therefore, the sealing pair can be always propped against the edge of the valve plate to form a sealing pair, and the effect of auxiliary sealing by pressure is realized. Because the bending part of the metal elastic sealing ring can deform, the sealing surface can not be influenced by thermal expansion and cold contraction, and when the thermal expansion and cold contraction generate micro deformation, the bending part of the metal elastic sealing ring can automatically perform sealing pressure compensation according to the characteristic of elastic compensation, so that the valve is stable and reliable in operation, and the service life of the valve is prolonged.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

FIG. 1 is a schematic cross-sectional view of a metal elastic seal bi-directional pressure-bearing tri-eccentric butterfly valve provided by embodiments of the present disclosure;

FIG. 2 is a schematic cross-sectional view of the structure at A-A in FIG. 1;

FIG. 3 is an enlarged schematic view of the structure at B in FIG. 2;

fig. 4 is an enlarged schematic view of the structure at C in fig. 2.

Reference numerals:

10: a valve body; 20: a valve seat; 30: a valve shaft; 40: a valve plate; 41: a connection part; 42: a round table part; 50: a press ring flange; 51: a flow hole; 52: a flange plate; 53: a first annular groove; 60: a metal elastic sealing ring; 61: a ring plate portion; 62: a bending portion; 70: a first seal ring; 80: and a second sealing ring.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

Referring to fig. 1 to 4, the embodiment of the present disclosure provides a metal elastic sealing bi-directional pressure-bearing tri-eccentric butterfly valve, which includes a valve body 10, a valve seat 20, a valve shaft 30, a valve plate 40, a pressure ring flange 50 and a metal elastic sealing ring 60. The valve seat 20 is mounted inside the valve body 10. The valve shaft 30 is rotatably mounted to the valve body 10 and penetrates the valve seat 20. The valve plate 40 is mounted on the valve shaft 30 and positioned inside the valve seat 20, and a gap is formed between the valve plate 40 and the valve seat 20. The pressure ring flange 50 is detachably mounted to the valve seat 20, and the pressure ring flange 50 includes a through-hole 51 for passing a medium therethrough, and the through-hole 51 is provided. The metal elastic seal ring 60 includes a ring plate portion 61 and a bending portion 62 connected to each other, the bending portion 62 is located inside the ring plate portion 61 to form a structure having a fishhook-shaped cross section, the ring plate portion 61 is mounted between the valve seat 20 and the pressure ring flange 50, and the bending portion 62 is located at a gap formed between the valve plate 40 and the valve seat 20. Wherein the medium enters the bent portion 62 through the flow hole 51, and the bent portion 62 is expanded outward until a seal is formed against the edge of the valve plate 40 by the pressure of the medium.

The embodiment of the disclosure provides a metal elastic sealing bidirectional pressure-bearing triple offset butterfly valve, which comprises a valve body 10, a valve seat 20, a valve shaft 30, a valve plate 40, a compression ring flange 50 and a metal elastic sealing ring 60. The valve seat 20 is mounted inside the valve body 10 to constitute a seal pair. The valve shaft 30 is rotatably attached to the valve body 10 and penetrates the valve seat 20, and is capable of rotational movement with respect to the valve body 10 and the valve seat 20. The valve plate 40 is mounted on the valve shaft 30 and located inside the valve seat 20, and is driven by the valve plate 40 to rotate by an angle of 0-90 degrees. The valve is in a fully opened state when rotating to 90 degrees, and is in a fully closed state when rotating to 0 degrees. A gap is formed between the valve plate 40 and the valve seat 20 so that the valve plate 40 can rotate inside the valve seat 20. The compression ring flange 50 is detachably mounted on the valve seat 20, and is used for compressing and fixing the metal elastic sealing ring 60. The pressure ring flange 50 comprises a through-going bore 51, the through-going bore 51 being intended for the passage of a medium. The metal elastic sealing ring 60 comprises a ring plate part 61 and a bending part 62 which are connected, and is made of a high-performance nichrome Inconel625 plate with the thickness of 1-2 mm, and is formed by rolling through a special die. The bending portion 62 is located inside the annular plate portion 61 to form a structure having a fishhook-shaped cross section, and the torque when the valve is opened or closed is reduced by the seal ring of a specific structure. The annular plate portion 61 is mounted between the valve seat 20 and the pressure ring flange 50, and the bent portion 62 is located at a gap formed between the valve plate 40 and the valve seat 20, for sealing the gap. Wherein the medium enters the bent portion 62 through the flow hole 51, and the bent portion 62 is expanded outward until a seal is formed against the edge of the valve plate 40 by the pressure of the medium.

In use, when the valve is in a fully closed condition, the medium will enter the curved portion 62 of the metal elastic seal ring 60 through the flow hole 51. Then, under the pressure of the medium, the bending portion 62 of the metal elastic sealing ring 60 will deform, so that the bending portion 62 of the metal elastic sealing ring 60 expands outwards. Therefore, the sealing pair can always be abutted against the edge of the valve plate 40, and an auxiliary sealing effect by pressure is achieved. Because the bending part 62 of the metal elastic sealing ring 60 can deform, the sealing surface can not be influenced by thermal expansion and cold contraction, and when the thermal expansion and cold contraction generate micro deformation, the bending part 62 of the metal elastic sealing ring 60 can automatically perform sealing pressure compensation according to the characteristic of elastic compensation, so that the valve is stable and reliable in operation, and the service life of the valve is prolonged.

Optionally, as shown in connection with fig. 3 and 4, the press ring flange 50 further comprises a flange plate 52. The flow holes 51 are uniformly distributed around the flange 52.

In the disclosed embodiment, the compression ring flange 50 also includes a flange plate 52 that is removably mounted to the valve seat 20. The number of the flow holes 51 is plural, and the plurality of flow holes 51 are uniformly distributed around the flange 52, so that the medium can uniformly enter the bending portion 62 of the metal elastic seal ring 60. Thereby enabling the bending portion 62 of the metal elastic seal ring 60 to be uniformly deformed, and further improving the sealing effect.

Optionally, as shown in connection with fig. 3 and 4, the pressure ring flange 50 further comprises a first annular groove 53. The first annular groove 53 is located on the inner side of the flange 52. Wherein the edge of the curved portion 62 abuts against the groove bottom of the first annular groove 53.

In the disclosed embodiment, the compression ring flange 50 further includes a first annular groove 53 on the inner side of the flange plate 52. The groove bottom of the first annular groove 53 is used for abutting against the edge of the bending portion 62, and then a sealing structure is formed between the compression ring flange 50 and the metal elastic sealing ring 60. So that the metal elastic packing 60 can be subjected to a sufficient medium pressure to enhance the sealing effect.

Optionally, a bolt is also included. Bolts are installed between the valve seat 20, the annular plate portion 61 and the flange plate 52. Wherein, disk seat 20 includes the screw hole, and annular plate portion 61 includes the through-hole, and ring flange 52 includes the mounting hole, wears to locate the through-hole and threaded connection in the screw hole after the bolt is installed in the mounting hole.

In the embodiment of the present disclosure, bolts are further included that are installed between the valve seat 20, the annular plate portion 61, and the flange plate 52. The bolts are attached to the attachment holes of the flange plate 52, then pass through the through holes of the annular plate portion 61, and are screwed into the screw holes of the valve seat 20, thereby fixing the pressure ring flange 50 and the metal elastic seal ring 60 to the valve seat 20 as a connecting member. The bolt is used as a connecting piece, so that the connecting piece has the advantages of stable connection and convenient disassembly.

Optionally, as shown in connection with fig. 3 and 4, the valve seat 20 further comprises a second annular groove. The second annular groove is located on the inner side of the valve seat 20. Wherein the curved portion 62 is received into the second annular groove after the annular plate portion 61 is mounted between the valve seat 20 and the press ring flange 50.

In the disclosed embodiment, the valve seat 20 further includes a second annular groove located on an inner side of the valve seat 20. The second annular groove is for receiving the bent portion 62 of the metal elastic packing 60 so that the metal elastic packing 60 can be fixed between the valve seat 20 and the press ring flange 50 by the circular plate portion.

Alternatively, as shown in conjunction with fig. 1 and 2, the valve plate 40 includes a connecting portion 41 and a land portion 42. The connection portion 41 is connected to the valve shaft 30. The truncated cone 42 is connected to the connecting portion 41. Wherein the curved portion 62 abuts against the side surface of the truncated cone 42.

In the disclosed embodiment, the valve plate 40 includes a connecting portion 41 and a land portion 42 that are connected. The connection portion 41 is for connection to the valve shaft 30, and the side surface of the truncated cone portion 42 is for abutting against the bent portion 62 of the metal elastic seal ring 60. Since the side surface of the truncated cone 42 is inclined at a certain angle, a specific eccentric angle can be formed. So that the valve plate 40 can reduce the necessary friction at the moment of opening and at the moment of releasing the seal. Thereby reducing abrasion and prolonging service life.

Optionally, as shown in connection with fig. 3 and 4, a first sealing ring 70 is also included. A first seal ring 70 is mounted between the valve seat 20 and the annular plate portion 61 for enhancing the seal.

In the disclosed embodiment, a first seal ring 70 is also included that is mounted between the valve seat 20 and the annular plate portion 61. The first seal ring 70 is used for improving the sealing effect at the contact position of the valve seat 20 and the annular plate portion 61, and plays a role in enhancing sealing.

Optionally, as shown in connection with fig. 3 and 4, a second sealing ring 80 is also included. A second seal ring 80 is mounted between the pressure ring flange 50 and the annular plate portion 61 for enhancing the seal.

In an embodiment of the present disclosure, a second seal ring 80 is further included that is mounted between the pressure ring flange 50 and the annular plate portion 61. The second seal ring 80 is used for improving the sealing effect at the contact position of the pressure ring flange 50 and the ring plate portion 61, and plays a role in enhancing sealing.

Optionally, as shown in connection with fig. 1, a valve packing is also included. A valve packing is installed between the valve body 10 and the valve shaft 30 for reinforcing sealing.

In the disclosed embodiment, valve packing is also included that is mounted between the valve body 10 and the valve shaft 30. The valve packing improves the sealing effect of the contact part of the valve body 10 and the valve shaft 30, and plays a role in reinforcing the sealing.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (9)

1. A metal elastic seal bi-directional pressure-bearing tri-eccentric butterfly valve, comprising:

A valve body;

A valve seat mounted inside the valve body;

the valve shaft is rotatably arranged on the valve body and penetrates through the valve seat;

The valve plate is arranged on the valve shaft and positioned in the valve seat, and a gap is formed between the valve plate and the valve seat;

The compression ring flange is detachably arranged on the valve seat and comprises a flow hole, and the flow hole is used for passing through a medium;

The metal elastic sealing ring comprises a ring plate part and a bending part which are connected, the bending part is positioned at the inner side of the ring plate part to form a structure with a fishhook-shaped cross section, the ring plate part is arranged between the valve seat and the pressure ring flange, and the bending part is positioned at a gap formed by the valve plate and the valve seat;

The medium enters the bending part through the flow hole, and the bending part is outwards expanded under the pressure action of the medium until the medium abuts against the edge of the valve plate to form a seal.

2. The metallic, resilient, sealed, bi-directional, pressure-bearing, tri-eccentric butterfly valve of claim 1, wherein the pressure ring flange further comprises:

The circulating holes are uniformly distributed around the flange.

3. The metallic, resilient, sealed, bi-directional, pressure-bearing, tri-eccentric butterfly valve of claim 2, wherein the pressure ring flange further comprises:

The first annular groove is positioned on the inner side surface of the flange plate;

wherein, the edge of the bending part is propped against the groove bottom of the first annular groove.

4. The metallic elastic seal bi-directional pressure-bearing tri-eccentric butterfly valve of claim 2, further comprising:

The bolts are arranged among the valve seat, the annular plate part and the flange plate;

The valve seat comprises a threaded hole, the annular plate part comprises a through hole, the flange plate comprises a mounting hole, and the bolt is arranged in the through hole in a penetrating manner after being arranged in the mounting hole and is in threaded connection with the threaded hole.

5. The metallic, resilient, sealed, bi-directional, pressure-bearing, tri-eccentric butterfly valve of claim 1, wherein the valve seat further comprises:

the second annular groove is positioned on the inner side surface of the valve seat;

Wherein the curved portion is received into the second annular groove after the annular plate portion is mounted between the valve seat and the press ring flange.

6. The metallic, resilient, sealed, bi-directional, pressure-bearing, tri-eccentric butterfly valve of claim 1, wherein the valve plate comprises:

A connecting portion connected to the valve shaft;

The round platform part is connected with the connecting part;

Wherein, the bending part is propped against the side surface of the round platform part.

7. A metallic, resilient, sealed, bi-directional, pressure-bearing, tri-eccentric butterfly valve as in any one of claims 1 to 6, further comprising:

and the first sealing ring is arranged between the valve seat and the annular plate part and is used for reinforcing sealing.

8. A metallic, resilient, sealed, bi-directional, pressure-bearing, tri-eccentric butterfly valve as in any one of claims 1 to 6, further comprising:

And the second sealing ring is arranged between the pressure ring flange and the annular plate part and used for reinforcing sealing.

9. A metallic, resilient, sealed, bi-directional, pressure-bearing, tri-eccentric butterfly valve as in any one of claims 1 to 6, further comprising:

and the valve packing is arranged between the valve body and the valve shaft and used for reinforcing sealing.