CN113983176B - Marine ultralow temperature double-valve seat double-sealing butterfly valve - Google Patents

Marine ultralow temperature double-valve seat double-sealing butterfly valve Download PDF

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Publication number
CN113983176B
CN113983176B CN202111228570.2A CN202111228570A CN113983176B CN 113983176 B CN113983176 B CN 113983176B CN 202111228570 A CN202111228570 A CN 202111228570A CN 113983176 B CN113983176 B CN 113983176B
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CN
China
Prior art keywords
valve
plate
butterfly
double
valve rod
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Active
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CN202111228570.2A
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Chinese (zh)
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CN113983176A (en
Inventor
杨克挺
金宁
王胤莹
顾杨庆
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Shanghai Hudong Marine Valve Manufacture Co ltd
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Shanghai Hudong Marine Valve Manufacture Co ltd
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Publication of CN113983176A publication Critical patent/CN113983176A/en
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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
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
    • F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
    • F16J15/122—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement generally parallel to the surfaces
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
    • F16J15/30—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings with sealing rings made of carbon
    • 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
    • F16K1/222—Shaping of the valve member
    • 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
    • F16K1/16—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
    • F16K1/2268—Sealing means for the axis of rotation
    • 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
    • F16K1/44—Details of seats or valve members of double-seat valves
    • 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
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F16K27/0218—Butterfly valves
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/53—Mechanical actuating means with toothed gearing
    • F16K31/535—Mechanical actuating means with toothed gearing for rotating valves
    • 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
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings

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

Abstract

The invention provides a marine ultralow temperature double-valve seat double-sealing butterfly valve, which comprises a valve rod, an actuator, a bracket, a valve cover, a valve body, a butterfly plate and a bottom cover, wherein the valve rod is arranged on the actuator; one end of the valve rod is provided with an actuator which is used for controlling the valve rod to rotate, and the end face of the other end of the valve rod is provided with a bottom cover; the actuator is to the valve rod of valve gap on the cover overlap in proper order and has joint sealed support, valve gap and valve body each other, the valve gap is closed, the valve body includes a cavity, the cavity is separated by one section valve rod, both sides are inlet chamber and export chamber respectively, be provided with the butterfly plate on one section valve rod, the rotation of valve rod axle drive butterfly plate has set gradually bottom plate between butterfly plate and the valve body, first disk seat, the medium plate, second disk seat and upper plate, bottom plate and medium plate are used for clamping fixed first disk seat, medium plate and upper plate are used for clamping fixed second disk seat, first disk seat and second disk seat are used for when butterfly plate is closed, contact with the butterfly plate and seal, so that inlet chamber and export chamber are separated. The butterfly valve can normally work in an ultralow-temperature working environment.

Description

Marine ultralow temperature double-valve seat double-sealing butterfly valve
Technical Field
The invention relates to the technical field of ultralow temperature valves, in particular to a marine ultralow temperature double-valve seat double-sealing butterfly valve.
Background
The butterfly valve is also called as a flap valve, and is a valve which has a simple structure and can be used for opening and closing low-pressure pipeline media. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The pipe is mainly used for cutting and throttling. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly valve opening and closing piece in the valve body, so that the purpose of opening and closing or adjusting is achieved.
With the development of shipbuilding industry, more and more valves are widely applied to ship piping, and play a quite important role in the whole ship system. Liquefied Natural Gas (LNG) vessels are special vessels designed and built for transporting liquefied natural gas at an extremely low temperature of-163 ℃, and among all freight vessels at present, LNG vessel technology is the most complex and difficult, and is called as "open beads on crown" for world shipbuilding.
Therefore, there is a need for a butterfly valve suitable for use in Liquefied Natural Gas (LNG) vessels that can operate properly in ultra-low temperature environments.
Disclosure of Invention
The invention provides a marine ultralow-temperature double-valve-seat double-sealing butterfly valve which can normally work in an ultralow-temperature working environment, is applicable to more complex working conditions compared with a conventional butterfly valve, has bidirectional sealing capability, and has high practical value and development prospect.
To achieve the above and other related objects, the present invention provides a marine ultralow temperature double-valve seat double-seal butterfly valve, comprising a valve rod, an actuator, a bracket, a valve cover, a valve body, a butterfly plate and a bottom cover;
the actuator is arranged at one end of the valve rod, the actuator controls the valve rod to rotate axially through a worm gear, and the end face of the other end of the valve rod is provided with the bottom cover;
The actuator is sleeved with the support, the valve cover and the valve body which are mutually jointed and sealed on the valve rod of the valve cover in sequence, the valve cover is closed, the valve body comprises a cavity, the cavity is divided by a section of valve rod, an inlet cavity and an outlet cavity are respectively arranged on two sides of the cavity, the butterfly plate is arranged on the section of valve rod, and the butterfly plate is driven to rotate by the valve rod shaft so that the inlet cavity and the outlet cavity are communicated or separated;
The butterfly plate with set gradually bottom plate, first disk seat, medium plate, second disk seat and upper plate between the valve body, the bottom plate with the medium plate is used for the clamp to fix first disk seat, the medium plate with the upper plate is used for the clamp to fix the second disk seat, first disk seat with the second disk seat is used for when the butterfly plate is closed, with the butterfly plate contact seal, so that the inlet chamber with the outlet chamber is separated.
Further, the one-section valve rod is fixed with the butterfly plate through a locking pin, the butterfly plate is located on one side of the one-section valve rod, and the locking pin penetrates through the other side of the one-section valve rod from one side of the one-section valve rod.
Further, metal wave tooth compound gaskets are arranged between the valve body and the valve cover, between the bottom cover and the valve body, between the bottom plate and the middle plate and between the middle plate and the upper plate, and the metal wave tooth compound gaskets are made by bonding asbestos-free nonmetallic materials on the surface of a wave-shaped metal frame.
Further, a packing gland, a packing pressing ring, packing and a packing pad are sequentially arranged between the valve cover and the valve rod from one end far away from the valve body, and the packing gland, the packing pressing ring and the packing pad are used for fixing the packing.
Further, the packing is of an annular structure and sleeved on the valve rod, two ends of the packing are made of nickel wire reinforced graphite, and the middle of the packing is made of high-purity butterfly graphite.
Further, a set of split rings is provided between the packing gland and the packing gland ring.
Further, the packing gland is fixed at one end of the valve cover through a fastener, and a disc spring is arranged between the fastener and the packing gland.
Further, the valve cover is connected with the valve body and the valve cover is connected with the bracket through fasteners.
Further, two sides of the bracket are respectively provided with a lifting lug.
Further, the butterfly plate is of a hollow design.
In conclusion, the marine ultralow-temperature double-valve seat double-sealing butterfly valve provided by the invention is controlled to open and close by the worm gear and worm, so that the large-caliber butterfly valve can be easily opened and closed; in addition, the butterfly plate adopts a hollow design, so that the flow resistance coefficient in the liquid flowing process is greatly reduced, and the flow is increased; finally, the double-valve seat double-sealing arrangement is adopted, so that the sealing performance of the valve in a low-temperature environment is greatly improved, and meanwhile, the valve has bidirectional sealing performance.
Drawings
FIG. 1 is a schematic diagram of a marine ultralow temperature double-valve seat double-seal butterfly valve according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a sealing gasket at a bottom cover of a marine ultralow temperature double-valve seat double-sealing butterfly valve according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a design of a double valve seat in a marine ultralow temperature double valve seat double seal butterfly valve according to an embodiment of the invention;
FIG. 4 is a schematic diagram of double valve seat compression in a marine ultralow temperature double valve seat double seal butterfly valve according to an embodiment of the invention;
FIG. 5 is a schematic diagram of a sealing gasket at the joint of a valve cover and a valve body in a marine ultralow temperature double-valve seat double-sealing butterfly valve according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a packing pressing ring in a marine ultralow temperature double-valve seat double-seal butterfly valve according to an embodiment of the invention.
Detailed Description
The marine ultralow temperature double-valve seat double-sealing butterfly valve provided by the invention is further described in detail below with reference to figures 1-6 and detailed description. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for the purpose of facilitating and clearly aiding in the description of embodiments of the invention. For a better understanding of the invention with objects, features and advantages, refer to the drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that any modifications, changes in the proportions, or adjustments of the sizes of structures, proportions, or otherwise, used in the practice of the invention, are included in the spirit and scope of the invention which is otherwise, without departing from the spirit or essential characteristics thereof.
It is noted that 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. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Referring to fig. 1 and 3, the invention provides a marine ultralow temperature double-valve seat double-sealing butterfly valve, which comprises a valve rod 3, an actuator 25, a bracket 20, a valve cover 4, a valve body 1, a butterfly plate 2 and a bottom cover 5; one end of the valve rod 3 is provided with an actuator 25, the actuator 25 controls the valve rod 3 to rotate through a worm gear, and the opening and closing of the butterfly valve are controlled by the worm gear, so that the butterfly valve with large caliber can be easily opened and closed. The end face of the other end of the valve rod 3 is provided with a bottom cover 5, and the bottom cover 5 and a bottom sealing ring 6 can jointly ensure the sealing performance of the lower end of the butterfly valve and provide a fulcrum for the shaft rotation of the valve rod 3. The actuator 25 is sleeved with a support 20, a valve cover 4 and a valve body 1 which are jointed and sealed with each other on a valve rod 3 of the valve cover 5 in sequence, the valve cover 4 is closed, the valve body 1 comprises a cavity, the cavity is separated by a section of valve rod 3, an inlet cavity and an outlet cavity are respectively arranged on two sides of the cavity, a section of valve rod 3 is provided with a butterfly plate 2, and the butterfly plate 2 is driven to rotate by the shaft rotation of the valve rod 3 so that the inlet cavity and the outlet cavity are communicated or separated. Referring to fig. 3, a bottom plate 8, a first valve seat 57, a middle plate 9, a second valve seat 56 and an upper plate 10 are sequentially arranged between the butterfly plate 2 and the valve body 1, the bottom plate 8 and the middle plate 9 are used for clamping and fixing the first valve seat 57, the middle plate 9 and the upper plate 10 are used for clamping and fixing the second valve seat 56, and when the first valve seat 57 and the second valve seat 56 are used for closing the butterfly plate 2, the first valve seat 57 and the second valve seat 56 are in contact with the butterfly plate 2 to seal, so that an inlet cavity and an outlet cavity are separated. The double-valve seat double-seal arrangement is adopted, so that the sealing performance of the valve in a low-temperature environment is greatly improved, and meanwhile, the valve has bidirectional sealing performance.
In this embodiment, referring to fig. 2-6, a first metal corrugated composite gasket 14 is disposed between the valve body 1 and the valve cover 4, and the metal corrugated composite gasket 14 is formed by bonding asbestos-free nonmetallic materials such as flexible graphite or polytetrafluoroethylene on the lower surface of a special corrugated metal frame. The metal tooth composite shim 14 has better rebound compensation performance and lower preload. A second metal wave tooth composite gasket 6 is also arranged between the bottom cover 5 and the valve body 1, a third metal wave tooth composite gasket 21 is arranged between the bottom plate 8 and the valve body 1, the middle plate 9 and the bottom plate 8, and the upper plate 10 and the middle plate 9 respectively for ensuring the sealing performance requirements of all parts.
In this embodiment, referring to fig. 1, the butterfly plate 2 is sleeved on the valve rod 3 and fixed with the butterfly plate 2 by a locking pin 13. The lower end of the valve rod 3 is provided with a bottom cover 5, the bottom cover and a bottom sealing ring 6 jointly ensure the sealing performance of the lower end of the butterfly valve, the other end of the valve rod 3 is provided with a key slot, and the valve rod can be electrically connected with a worm gear and worm, and a hydraulic actuator is used for controlling the opening and closing of the valve.
In this embodiment, referring to fig. 1, a packing gland 19, a packing ring 17, a packing 16 and a packing 15 are sequentially disposed between the valve cover 4 and the valve rod 3 from an end far from the valve body 1, and the packing gland 19, the packing ring 17 and the packing 15 are used for fixing the packing 16. As shown in fig. 1, a packing pad 16 is arranged at the upper ends of the valve rod 3 and the valve cover 4, the packing 16 is placed above the valve rod, the packing 16 generally adopts nickel wire reinforced graphite with a special structure as an end ring, has excellent scraping resistance and scraping cleaning function, and the high-purity butterfly graphite adopted in the middle can achieve the characteristic of high-efficiency sealing under the low pre-condition, so that the sealing performance of the packing of the valve is fully ensured.
In this embodiment, referring to fig. 1, a packing pressing ring 17 is disposed at an upper end of the packing 16 and is disposed below a packing pressing cover 19. The pair of ring-opening rings 18 are arranged between the packing gland 19 and the packing gland 17, so that the blowout prevention device is formed together, the valve rod 3 is prevented from being blown out in the use process, the use safety of the valve is improved, the uniform stress of the gland and the uniform stress of packing can be fully ensured, and the sealing performance is ensured. And, set up dish spring 47 and nut on the gland 19 and compress tightly, guarantee because long-time compress tightly and temperature influence, the loose leakage problem that leads to of packing fully guarantees that packing 16 is in the state of compressing tightly constantly, guarantees sealing performance. Finally, two O-shaped ring grooves are formed in the outer side of the packing pressing ring 17, one O-shaped ring groove is formed in the inner side of the packing pressing ring, one O-shaped ring 45 is respectively arranged in each of the three O-shaped ring grooves, sealing performance is fully guaranteed, and leakage of the valve is avoided.
In this embodiment, referring to fig. 1, the packing gland 19 is connected with the valve cover 4, and the valve cover 4 is connected with the valve body 1 through fasteners, the upper end of the valve cover 4 is also connected with the bracket 20 through fasteners, and two lifting lugs 37 are respectively arranged on the left side and the right side of the bracket for lifting the valve.
In this embodiment, as shown in fig. 1, the outer sides of the first valve seat 15 and the second valve seat 56 further include a pressing plate 11, a spring retainer ring 12, a nut and a bolt, which together form a sealing system of the butterfly valve, so that the butterfly valve can perform bidirectional sealing, and the butterfly plate 2 adopts a hollow design, so that the flow resistance in the liquid flowing process is greatly reduced.
In this embodiment, four bearing sleeves 23 are disposed between the valve body 1 and the valve rod 3, so that friction resistance of the valve in the opening and closing process is reduced, and meanwhile, the valve rod 3 is supported and guided.
The invention has the advantages that:
1) The invention controls the opening and closing of the butterfly valve by the worm gear and the worm, and can easily open and close the butterfly valve with large caliber.
2) The butterfly plate adopts a hollow design, so that the flow resistance coefficient in the liquid flowing process is greatly reduced, the flow is increased,
3) The double-valve seat double-sealing arrangement is adopted, so that the sealing performance of the valve in a low-temperature environment is greatly improved, and meanwhile, the valve has bidirectional sealing performance; the pressing plate, the spring retainer ring, the bolt and the nut together form a pressing device, so that the bottom plate, the middle plate and the upper plate can be effectively pressed, and the loosening of the bolt can be prevented; the medium plate adopts ingenious design, processes the recess for two disk seats are evenly stressed in the compress tightly the in-process, improve sealing performance.
4) The packing pressing ring is split, and the packing gland forms an anti-blowout device together, so that the valve rod is prevented from blowout in the use process, and the use safety of the valve is improved; the outer wall of the packing pressing ring is provided with two O-shaped ring grooves, the inner wall of the packing pressing ring is provided with one O-shaped ring groove, two O-shaped rings are arranged between the packing pressing ring and the valve cover, and one O-shaped ring is arranged between the packing pressing ring and the valve rod, so that the sealing performance of a packing position is fully ensured; and three groups of disc springs are arranged on the packing pressing cover and used for compensating the shrinkage of the packing after the packing is extruded and deformed, so that the packing is fully pressed, and the sealing performance of the packing is fully ensured.
5) Lifting lugs on two sides of the support are designed, so that the valve is more convenient in the lifting process.
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 (7)

1. The marine ultralow-temperature double-valve seat double-sealing butterfly valve is characterized by comprising a valve rod, an actuator, a bracket, a valve cover, a valve body, a butterfly plate and a bottom cover;
the actuator is arranged at one end of the valve rod, the actuator controls the valve rod to rotate axially through a worm gear, and the end face of the other end of the valve rod is provided with the bottom cover;
The actuator is sleeved with the support, the valve cover and the valve body which are mutually jointed and sealed on the valve rod of the valve cover in sequence, the valve cover is closed, the valve body comprises a cavity, the cavity is divided by a section of valve rod, an inlet cavity and an outlet cavity are respectively arranged on two sides of the cavity, the butterfly plate is arranged on the section of valve rod, and the butterfly plate is driven to rotate by the valve rod shaft so that the inlet cavity and the outlet cavity are communicated or separated;
A bottom plate, a first valve seat, a middle plate, a second valve seat and an upper plate are sequentially arranged between the butterfly plate and the valve body, the bottom plate and the middle plate are used for clamping and fixing the first valve seat, the middle plate and the upper plate are used for clamping and fixing the second valve seat, and when the first valve seat and the second valve seat are used for closing the butterfly plate, the first valve seat and the second valve seat are in contact seal with the butterfly plate so as to separate the inlet cavity from the outlet cavity;
Metal wave tooth composite gaskets are arranged between the valve body and the valve cover, between the bottom cover and the valve body, between the bottom plate and the middle plate and between the middle plate and the upper plate, and the metal wave tooth composite gaskets are made of non-asbestos nonmetallic materials bonded on the surface of a wave-shaped metal frame;
A packing gland, a packing pressing ring, packing and a packing pad are sequentially arranged between the valve cover and the valve rod from one end far away from the valve body, and the packing gland, the packing pressing ring and the packing pad are used for fixing the packing;
a group of split rings are arranged between the packing gland and the packing pressing ring.
2. The marine ultra-low temperature double-valve seat double-seal butterfly valve of claim 1, wherein the length of valve rod is fixed to the butterfly plate by a locking pin, and the butterfly plate is located on one side of the length of valve rod, and the locking pin penetrates through the other side of the length of valve rod from one side of the length of valve rod.
3. The marine ultralow temperature double-valve seat double-sealing butterfly valve according to claim 1, wherein the filler is of an annular structure and is sleeved on the valve rod, two ends of the filler are made of nickel wire reinforced graphite, and the middle of the filler is made of high-purity butterfly graphite.
4. The marine ultralow temperature double-valve seat double-sealing butterfly valve of claim 1, wherein the packing gland is fixed at one end of the valve cover through a fastener, and the fastener and the packing gland are provided with a disc spring.
5. The marine ultralow temperature double-valve seat double-sealing butterfly valve of any one of claims 1-4, wherein the valve cover and the valve body and the valve cover and the bracket are connected through fasteners.
6. The marine ultralow temperature double-valve seat double-sealing butterfly valve according to any one of claims 5, wherein two lifting lugs are arranged on two sides of the bracket.
7. The marine ultralow temperature double-valve seat double-sealing butterfly valve of claim 1, wherein the butterfly plate is of hollow design.
CN202111228570.2A 2021-10-21 2021-10-21 Marine ultralow temperature double-valve seat double-sealing butterfly valve Active CN113983176B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200254812Y1 (en) * 2001-08-31 2001-12-01 이정수 Double sealing metal seat for butterfly valve
KR200295954Y1 (en) * 2002-08-20 2002-11-29 이정수 Double sealing structure for butterfly valve
WO2008149429A1 (en) * 2007-06-05 2008-12-11 Nbs Co., Ltd. Butterfly valve for extreme cold
CN103629372A (en) * 2013-12-05 2014-03-12 河南煜达阀门制造有限公司 Three-eccentric center low-flow-resistance butterfly valve
KR101403402B1 (en) * 2013-12-30 2014-06-03 김만영 Butterfly valve
CN205371655U (en) * 2016-01-14 2016-07-06 北京市阀门总厂股份有限公司 Ultra -low temperature butterfly valve
CN205978433U (en) * 2016-07-20 2017-02-22 中石化洛阳工程有限公司 Flexible graphite metal ripples tooth composite gasket
CN206290823U (en) * 2016-12-07 2017-06-30 上海弘盛特种阀门制造股份有限公司 A kind of high-performance LNG seals ultralow temperature butterfly valve with hard
CN107314119A (en) * 2017-07-19 2017-11-03 武汉武船机电模块有限责任公司 A kind of hull valve

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200254812Y1 (en) * 2001-08-31 2001-12-01 이정수 Double sealing metal seat for butterfly valve
KR200295954Y1 (en) * 2002-08-20 2002-11-29 이정수 Double sealing structure for butterfly valve
WO2008149429A1 (en) * 2007-06-05 2008-12-11 Nbs Co., Ltd. Butterfly valve for extreme cold
CN103629372A (en) * 2013-12-05 2014-03-12 河南煜达阀门制造有限公司 Three-eccentric center low-flow-resistance butterfly valve
KR101403402B1 (en) * 2013-12-30 2014-06-03 김만영 Butterfly valve
CN205371655U (en) * 2016-01-14 2016-07-06 北京市阀门总厂股份有限公司 Ultra -low temperature butterfly valve
CN205978433U (en) * 2016-07-20 2017-02-22 中石化洛阳工程有限公司 Flexible graphite metal ripples tooth composite gasket
CN206290823U (en) * 2016-12-07 2017-06-30 上海弘盛特种阀门制造股份有限公司 A kind of high-performance LNG seals ultralow temperature butterfly valve with hard
CN107314119A (en) * 2017-07-19 2017-11-03 武汉武船机电模块有限责任公司 A kind of hull valve

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