CN117267391A - Butterfly valve with sealing structure - Google Patents

Butterfly valve with sealing structure Download PDF

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Publication number
CN117267391A
CN117267391A CN202311400566.9A CN202311400566A CN117267391A CN 117267391 A CN117267391 A CN 117267391A CN 202311400566 A CN202311400566 A CN 202311400566A CN 117267391 A CN117267391 A CN 117267391A
Authority
CN
China
Prior art keywords
ring
sealing
butterfly
plate
arcuate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311400566.9A
Other languages
Chinese (zh)
Inventor
王雪童
顾庭宇
俞垚
丁波
夏明�
王大玮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Hudong Marine Valve Manufacture Co ltd
Original Assignee
Shanghai Hudong Marine Valve Manufacture Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Hudong Marine Valve Manufacture Co ltd filed Critical Shanghai Hudong Marine Valve Manufacture Co ltd
Priority to CN202311400566.9A priority Critical patent/CN117267391A/en
Publication of CN117267391A publication Critical patent/CN117267391A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226—Shaping or arrangements of the sealing
    • F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/46—Attachment of sealing rings
    • F16K1/465—Attachment of sealing rings to the valve seats

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

The invention discloses a butterfly valve with a sealing structure, which comprises a valve body, a butterfly plate and a sealing structure arranged on the valve body, wherein the sealing structure comprises an arched sealing ring and a sealing compression ring; the arc-shaped sealing ring and the butterfly plate are in interference fit, and the arc-shaped sealing ring and the sealing compression ring form an annular plate spring structure; the scheme has good stability to cyclic high cycle fatigue damage, and has the advantages of fatigue damage resistance, life prolonging and self-compensating interference.

Description

Butterfly valve with sealing structure
Technical Field
The invention relates to the field of valve equipment, in particular to a butterfly valve with a sealing structure.
Background
With the development of various industries such as aerospace, marine shipbuilding and the like, the importance of butterfly valves suitable for extremely complex working conditions (ultralow temperature, ultrahigh temperature, high pressure, multiphase flow and the like) is gradually highlighted. For example, liquefied Natural Gas (LNG) is a special ship designed and built for transporting LNG at an ultra-low temperature of-163 ℃, in which butterfly valves suitable for ultra-low temperature are used very frequently; for example, the working temperature of the liquid hydrogen system is minus 253 ℃, and the working pressure is 70MPa, and the ultra-low temperature butterfly valve is also widely used in the system. Therefore, the butterfly valve which can still work normally under extremely complex working conditions such as ultralow temperature, low, medium and high pressure, vibration and the like has extremely high use value and economic significance.
Disclosure of Invention
The invention aims to provide a butterfly valve which can still work normally under extremely complex working conditions such as ultralow temperature, low, medium and high pressure, vibration and the like.
In order to achieve the above object, the present invention provides a butterfly valve with a sealing structure, including a valve body, a butterfly plate, and a sealing structure disposed on the valve body, where the sealing structure includes an arcuate seal ring and a sealing pressure ring, and when the butterfly valve needs to be closed, the butterfly plate is rotated to a position of the sealing structure, and the sealing structure cooperates with the butterfly plate to provide a seal to close the butterfly valve; the bow-shaped sealing ring and the butterfly plate are in interference fit, and the bow-shaped sealing ring and the sealing compression ring form an annular plate spring structure.
Preferably, an annular first pressing plate and an annular second pressing plate are mounted on the valve body, and an annular groove is formed between the first pressing plate and the second pressing plate and is used for mounting the sealing structure.
Preferably, the arcuate seal ring and the second pressure plate have an interference, and the first pressure plate limits the axial freedom of the arcuate seal ring, so that the first pressure plate and the second pressure plate cooperatively fix the arcuate seal ring.
Preferably, the sealing compression ring is arranged in the annular groove and is arranged on the outer ring of the arched sealing ring.
Preferably, the arcuate sealing ring comprises an outer annular spring, an arcuate ring, a C-shaped ring and an inner annular spring which are sequentially connected from outside to inside, wherein a first end of the arcuate ring is connected with the outer annular spring, a second end of the arcuate ring is connected with a first end of the C-shaped ring, and a second end of the C-shaped ring is connected with the inner annular spring.
Preferably, the inner annular spring is arranged on the inner ring, the width of the inner annular spring is matched with that of the annular groove, and the inner annular spring and the butterfly plate have interference; the outer annular spring is connected with the sealing compression ring, so that the sealing compression ring and the arched sealing ring form the annular plate spring structure.
Preferably, the C-ring is of uniform construction so as to uniformly transfer energy transferred from the inner annular spring to the arcuate ring.
Preferably, the interference between the arched sealing ring and the butterfly plate is adjusted by controlling the interference between the arched sealing ring and the second pressing plate.
Preferably, the annular plate spring structure stores certain energy by setting the position of the sealing compression ring, so that when the sealing between the butterfly plate and the arched sealing ring is insufficient, the annular plate spring structure deforms to release energy, and when the pressure between the butterfly plate and the arched sealing ring is overlarge, the annular plate spring structure stores energy.
Preferably, according to different pressure grades, actual temperature environments and corresponding media, the interference between the arched sealing ring and the second pressing plate and between the arched sealing ring and the butterfly plate is adjusted manually.
Compared with the prior art, the invention has the following advantages and beneficial effects:
according to the scheme, the interference between the bow-shaped sealing ring and the butterfly plate is adjusted by controlling the interference between the bow-shaped sealing ring and the second pressing plate, so that effective sealing is ensured; the sealing compression ring and the bow-shaped sealing ring form an annular plate spring structure, so that the self-compensating adjustment of the sealing can be performed; the uniform C-shaped ring and the inner annular spring can be compressed or relaxed due to the change of the working environment in operation so as to store and release energy, and the uniform C-shaped ring and the inner annular spring have good stability on cyclic high-cycle fatigue damage and have the advantages of fatigue damage resistance, service life prolonging and self-compensating interference magnitude;
the sealing structure of the scheme has good overall sealing performance and wide application range, and can be used for ultralow temperature, single-phase fluid (gaseous fluid or liquid fluid) and multiphase fluid (solid-gas, liquid-gas or solid-liquid-gas system) butterfly valves or similar products;
the sealing structure in the scheme is simple, easy to install, debug, repair and maintain, and has compact overall structure, strong self-adaptability and high reliability.
Drawings
FIG. 1 is a schematic view of a part of a butterfly valve with a seal structure according to an embodiment of the invention;
fig. 2 is a schematic structural view of an arcuate seal ring according to an embodiment of the present invention.
Detailed Description
The technical scheme, constructional features, achieved objects and effects of the embodiments of the present invention will be described in detail below with reference to fig. 1 to 2 in the embodiments of the present invention.
It should be noted that, the drawings are in very simplified form and all use non-precise proportions, which are only used for the purpose of conveniently and clearly assisting in describing the embodiments of the present invention, and are not intended to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any modification of structure, change of proportion or adjustment of size, without affecting the efficacy and achievement of the present invention, should still fall within the scope covered by the technical content disclosed by the present invention.
It is noted that in the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment provides a butterfly valve with a sealing structure, as shown in fig. 1, comprising a valve body 1, a butterfly plate 2 and the sealing structure arranged on the valve body 1, wherein the sealing structure comprises an arched sealing ring 4 and a sealing compression ring 3, when the butterfly valve needs to be closed, the butterfly plate 2 is rotated to the position of the sealing structure, and the sealing structure and the butterfly plate 2 cooperate to provide sealing so as to close the butterfly valve.
An annular first pressing plate 5 and an annular second pressing plate 6 are mounted on the valve body 1, and an annular groove is formed between the first pressing plate 5 and the second pressing plate 6 and is used for mounting the sealing structure: the annular groove provides a mounting position for the arched sealing ring 4 and prevents the arched sealing ring 4 from sliding in the axial direction, the arched sealing ring 4 and the second pressing plate 6 are in interference fit, the first pressing plate 5 plays a role in limiting the axial freedom degree of the arched sealing ring 4, and therefore the first pressing plate 5 and the second pressing plate 6 cooperatively fix the arched sealing ring 4; the sealing compression ring 3 is also arranged in the annular groove and on the outer ring of the arched sealing ring 4 to support and fix the arched sealing ring 4.
In other embodiments, the arcuate sealing ring 4 may have an interference with the first pressing plate 5, and the second pressing plate 6 limits the axial freedom of the arcuate sealing ring 4.
As shown in fig. 2, the arcuate sealing ring 4 comprises an outer annular spring 7, an arcuate ring 8, a C-shaped ring 9 and an inner annular spring 10 which are sequentially connected from outside to inside, wherein a first end of the arcuate ring 8 is connected with the outer annular spring 7, a second end of the arcuate ring 8 is connected with a first end of the C-shaped ring 9, and a second end of the C-shaped ring 9 is connected with the inner annular spring 10, so that the outer annular spring 7 and the inner annular spring 10 provide support for the arcuate ring 8; the inner annular spring 10 is arranged on the inner ring, the width of the inner annular spring is matched with that of the annular groove, the inner annular spring 10 is in direct contact with the butterfly plate 2, and the inner annular spring and the butterfly plate 2 have interference, so that the arcuate sealing ring 4 is in interference fit with the butterfly plate 2; the width of the outer annular spring 7 is smaller than that of the inner annular spring 10, and the outer annular spring 7 is in direct contact connection with the sealing compression ring 3, so that the sealing compression ring 3 and the arched sealing ring 4 form an annular plate spring structure.
The outer ring spring 7 and the inner ring spring 10 play a role in energy storage and energy storage, and the C-shaped ring 9 is uniform in structure, so that force, energy and the like transmitted by the inner ring spring 10 are uniformly transmitted to the outer bow-shaped ring 8.
When in actual use, the interference between the arched sealing ring 4 and the butterfly plate 2 is adjusted by controlling the interference between the arched sealing ring 4 and the second pressing plate 6, so that the butterfly valve is sealed; the annular plate spring structure stores certain energy by setting the position of the sealing compression ring 3, so that when the sealing surface between the butterfly plate 2 and the arched sealing ring 4 is subjected to high cycle fatigue damage and abrasion in the gate valve cycle, the annular plate spring structure deforms to release energy, thereby ensuring enough interference between the arched sealing ring 4 and the butterfly plate 2 and realizing self-compensating adjustment of the sealing structure; when the working environment of the butterfly valve changes, and the sealing structure and the butterfly plate 2 are not tightly sealed or the pressure between the sealing structure and the butterfly plate 2 is too high, energy is released or stored through the outer annular spring 7, the bow-shaped ring 8 and the inner annular spring 10 in the annular plate spring structure, so that the normal sealing between the sealing structure and the butterfly plate 2 is ensured.
In addition, according to different pressure grades, actual temperature environments and corresponding media, the interference between the arched sealing ring 4 and the second pressing plate 6 and the interference between the arched sealing ring 4 and the butterfly plate 2 are adjusted manually. For example, when the working pressure level of the gate valve is high, the interference between the arcuate seal ring 4 and the second pressure plate 6 and between the arcuate seal ring 4 and the butterfly plate 2 is appropriately increased; when the gate valve is used in a liquid hydrogen system, since the hydrogen molecule is small in size, it is also necessary to moderately increase the interference in order to prevent leakage of the medium.
While the present invention has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the invention. Many modifications and substitutions of the present invention will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims (10)

1. The butterfly valve with the sealing structure is characterized by comprising a valve body, a butterfly plate and the sealing structure arranged on the valve body, wherein the sealing structure comprises an arched sealing ring and a sealing compression ring, when the butterfly valve needs to be closed, the butterfly plate is rotated to the position of the sealing structure, and the sealing structure and the butterfly plate cooperate to provide sealing so as to close the butterfly valve; the bow-shaped sealing ring and the butterfly plate are in interference fit, and the bow-shaped sealing ring and the sealing compression ring form an annular plate spring structure.
2. The butterfly valve with a seal of claim 1, wherein the valve body has first and second annular pressure plates mounted thereon, the first and second pressure plates defining therebetween an annular groove for mounting the seal.
3. The butterfly valve with a seal of claim 2, wherein the arcuate seal ring has an interference between the arcuate seal ring and the second pressure plate, the first pressure plate limiting an axial degree of freedom of the arcuate seal ring such that the first pressure plate and the second pressure plate cooperatively secure the arcuate seal ring.
4. A butterfly valve having a seal as recited in claim 3, wherein the seal ring is mounted within the annular groove and on an outer ring of the arcuate seal ring.
5. The butterfly valve with a seal of claim 4, wherein the arcuate seal ring comprises an outer annular spring, an arcuate ring, a C-ring, and an inner annular spring connected in sequence from the outside to the inside, the arcuate ring having a first end connected to the outer annular spring and a second end connected to the first end of the C-ring, the second end of the C-ring connected to the inner annular spring.
6. The butterfly valve with a sealing structure according to claim 5, wherein the inner annular spring is arranged on the inner ring, the width of the inner annular spring is matched with the width of the annular groove, and the inner annular spring and the butterfly plate have interference; the outer annular spring is connected with the sealing compression ring, so that the sealing compression ring and the arched sealing ring form the annular plate spring structure.
7. The butterfly valve with a seal of claim 6, wherein the C-ring is of uniform construction to uniformly transfer energy transferred from the inner annular spring to the arcuate ring.
8. The butterfly valve having a sealing structure of claim 6, wherein the amount of interference between the arcuate seal ring and the butterfly plate is adjusted by controlling the amount of interference between the arcuate seal ring and the second pressure plate.
9. The butterfly valve with a sealing structure of claim 6, wherein the annular leaf spring structure is configured to store energy by positioning the sealing ring such that the annular leaf spring structure will deform to release energy when the seal between the butterfly plate and the arcuate seal ring is insufficient and store energy when the pressure between the butterfly plate and the arcuate seal ring is excessive.
10. The butterfly valve with a sealing structure of claim 3, wherein the amount of interference between the arcuate seal ring and the second pressure plate and between the arcuate seal ring and the butterfly plate is manually adjusted based on different pressure ratings, actual temperature environments, and corresponding media.
CN202311400566.9A 2023-10-26 2023-10-26 Butterfly valve with sealing structure Pending CN117267391A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311400566.9A CN117267391A (en) 2023-10-26 2023-10-26 Butterfly valve with sealing structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311400566.9A CN117267391A (en) 2023-10-26 2023-10-26 Butterfly valve with sealing structure

Publications (1)

Publication Number Publication Date
CN117267391A true CN117267391A (en) 2023-12-22

Family

ID=89208134

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311400566.9A Pending CN117267391A (en) 2023-10-26 2023-10-26 Butterfly valve with sealing structure

Country Status (1)

Country Link
CN (1) CN117267391A (en)

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