CN113983176A - Maritime work ultralow temperature double-valve-seat double-seal butterfly valve - Google Patents

Maritime work ultralow temperature double-valve-seat double-seal butterfly valve Download PDF

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Publication number
CN113983176A
CN113983176A CN202111228570.2A CN202111228570A CN113983176A CN 113983176 A CN113983176 A CN 113983176A CN 202111228570 A CN202111228570 A CN 202111228570A CN 113983176 A CN113983176 A CN 113983176A
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CN
China
Prior art keywords
valve
seat
plate
butterfly
double
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
CN202111228570.2A
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Chinese (zh)
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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Application filed by Shanghai Hudong Marine Valve Manufacture Co ltd filed Critical Shanghai Hudong Marine Valve Manufacture Co ltd
Priority to CN202111228570.2A priority Critical patent/CN113983176A/en
Publication of CN113983176A publication Critical patent/CN113983176A/en
Pending legal-status Critical Current

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    • 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 maritime work ultralow-temperature double-valve-seat double-seal butterfly valve which comprises a valve rod, an actuator, a support, a valve cover, a valve body, a butterfly plate and a bottom cover, wherein the valve rod is fixedly connected with the actuator; one end of the valve rod is provided with an actuator, the actuator is used for controlling the valve rod to rotate in a shaft mode, and the end face of the other end of the valve rod is provided with a bottom cover; the valve rod from the actuator to the valve cover is sequentially sleeved with a support, the valve cover and a valve body which are mutually jointed and sealed, 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 formed in two sides of the cavity respectively, a butterfly plate is arranged on the section of valve rod, the valve rod rotates to drive the butterfly plate to rotate, 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 the first valve seat and the second valve seat are in contact sealing with the butterfly plate when the butterfly plate is closed, so that the inlet cavity and the outlet cavity are divided. The butterfly valve can work normally in the ultra-low temperature working environment.

Description

Maritime work ultralow temperature double-valve-seat double-seal butterfly valve
Technical Field
The invention relates to the technical field of ultralow temperature valves, in particular to a maritime work ultralow temperature double-valve-seat double-seal butterfly valve.
Background
A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and can be used for the on-off control of low-pressure pipeline media, namely a valve which is opened and closed by rotating around a valve shaft, wherein a closing member (a valve clack or a butterfly plate) is a disk. 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 mainly plays a role in cutting off and throttling. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the opening and closing or adjusting purpose is achieved.
With the development of shipbuilding industry, more and more valves are widely applied to ship piping and play a very important role in the whole ship system. The Liquefied Natural Gas (LNG) ship is a special ship designed and built for transporting liquefied natural gas at an extremely low temperature of-163 ℃, and among all the current freight ships, the LNG ship is the most technically complex and difficult, and is called as the pearl on the crown of the world shipbuilding.
Therefore, there is a need for a butterfly valve suitable for a Liquefied Natural Gas (LNG) ship and capable of operating normally in an ultra-low temperature environment.
Disclosure of Invention
The invention provides a maritime work ultralow-temperature double-valve-seat double-seal butterfly valve which can normally work in an ultralow-temperature working environment, is suitable for more complicated working conditions compared with a conventional butterfly valve, has bidirectional sealing capability, and has high practical value and development prospect.
In order to achieve the above objects and other related objects, the invention provides a maritime work ultralow temperature double-valve-seat double-seal butterfly valve, which comprises 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 and controls the valve rod to rotate in a shaft mode through a worm gear, and the bottom cover is arranged on the end face of the other end of the valve rod;
the support, the valve cover and the valve body which are mutually jointed and sealed are sequentially sleeved on the valve rod of the valve cover from the actuator, 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 section of valve rod is provided with the butterfly plate, and the valve rod shaft rotates to drive the butterfly plate to rotate so as to enable the inlet cavity and the outlet cavity to be communicated or divided;
the butterfly valve comprises a valve body and is characterized in that 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 the first valve seat and the second valve seat are used for being in contact sealing with the butterfly plate when the butterfly plate is closed, so that the inlet cavity and the outlet cavity are separated.
Further, the section of valve rod passes through the locking pin with the butterfly plate is fixed, and the butterfly plate is located one side of the section of valve rod, the locking pin runs through one side of the section of valve rod from one side of the section of valve rod and another side of the section of valve rod.
Furthermore, metal corrugated 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 are made of non-asbestos non-metal materials bonded on the surface of the corrugated metal frame.
Furthermore, 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 of the valve cover far away from the valve body, and the packing gland, the packing pressing ring and the packing pad are used for fixing the packing.
Furthermore, 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.
Further, a set of split rings is arranged between the packing gland and the packing pressing 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 support through fasteners.
Furthermore, two sides of the support are respectively provided with a lifting lug.
Further, the butterfly plate is of a hollow design.
In conclusion, the maritime work ultralow-temperature double-valve-seat double-seal butterfly valve provided by the invention has the advantages that the opening and closing of the butterfly valve are controlled by the worm gear, so that the large-diameter butterfly valve can be opened and closed easily; moreover, 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 the bidirectional sealing performance.
Drawings
FIG. 1 is a schematic view of a marine ultra-low temperature double-seat double-seal butterfly valve according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a sealing gasket at a bottom cover of a marine ultralow-temperature double-seat double-sealing butterfly valve according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a double-valve seat design in a marine ultralow-temperature double-valve seat double-seal butterfly valve according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the pressing of the double valve seats in the marine ultralow temperature double-valve-seat double-seal butterfly valve according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a sealing gasket at the joint of a valve cover and a valve body in the marine ultralow-temperature double-valve-seat double-sealing butterfly valve provided by an embodiment of the invention;
fig. 6 is a schematic view of a packing pressing ring in the marine ultralow temperature double-seat double-seal butterfly valve according to an embodiment of the present invention.
Detailed Description
The marine ultralow temperature double-valve seat double-seal butterfly valve provided by the invention is further described in detail with reference to the attached drawings 1-6 and the specific embodiment. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Referring to fig. 1 and 3, the invention provides a maritime work ultralow temperature double-valve-seat double-seal 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 shaft of the valve rod 3 to rotate through a worm gear, and the worm gear controls the opening and closing of the butterfly valve, so that the large-diameter butterfly valve can be opened and closed easily. The end face of the other end of the valve rod 3 is provided with a bottom cover 5, the bottom cover 5 and a bottom sealing ring 6 can jointly guarantee the sealing performance of the lower end of the butterfly valve, and a fulcrum is provided for the shaft rotation of the valve rod 3. The actuator 25 is sleeved with the support 20, the valve cover 4 and the valve body 1 which are mutually jointed and sealed in sequence from the valve rod 3 of the valve cover 5, the valve cover 4 is closed, the valve body 1 comprises a cavity, the cavity is divided by a section of the valve rod 3, an inlet cavity and an outlet cavity are respectively arranged on two sides of the cavity, a butterfly plate 2 is arranged on a section of the valve rod 3, and the valve rod 3 rotates in a shaft mode to drive the butterfly plate 2 to rotate so that the inlet cavity and the outlet cavity are communicated or divided. 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 the first valve seat 57 and the second valve seat 56 are used for contacting and sealing with the butterfly plate 2 when the butterfly plate 2 is closed, so that an inlet cavity and an outlet cavity are separated. 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 the bidirectional sealing performance.
In the present 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 adhering flexible graphite or polytetrafluoroethylene or other non-asbestos non-metallic materials to the lower surface of a special corrugated metal frame. The metal corrugated composite shim 14 has better spring back compensation 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 respectively arranged between the bottom plate 8 and the valve body 1, between the middle plate 9 and the bottom plate 8 and between the upper plate 10 and the middle plate 9, and is used for ensuring the sealing performance requirements of all parts.
In the present embodiment, referring to fig. 1, the butterfly plate 2 is sleeved on the valve rod 3 and fixed with the butterfly plate 2 through the locking pin 13. The lower end of the valve rod 3 is provided with a bottom cover 5 which jointly ensures the sealing performance of the lower end of the butterfly valve with a bottom sealing ring 6, and the other end of the valve rod 3 is provided with a key groove which can be electrically connected with a worm gear and a hydraulic actuator and is used for controlling the opening and closing of the valve.
In the present embodiment, referring to fig. 1, a packing gland 19, a packing retainer 17, a packing 16 and a packing pad 15 are sequentially arranged between the valve cover 4 and the valve rod 3 from the end away from the valve body 1, and the packing gland 19, the packing retainer 17 and the packing pad 15 are used for fixing the packing 16. As shown in fig. 1, a packing pad 16 is arranged at the upper end of the valve rod 3 and the valve cover 4, a packing 16 is arranged above the valve rod 3 and the valve cover 4, the packing 16 generally adopts specially-structured nickel wire reinforced graphite as an end ring and has excellent scratch resistance and a scale scraping and cleaning function, and the high-purity butterfly graphite adopted in the middle can achieve the characteristic of efficient sealing under the low-pre-condition, so that the sealing performance of the valve packing is fully ensured.
In the present embodiment, referring to fig. 1, the packing 16 is provided with a packing retainer 17 at the upper end and is disposed below the packing gland 19. A set of split rings 18 are arranged between the packing gland 19 and the packing pressing ring 17 to jointly form a blowout prevention device, so that the valve rod 3 is prevented from blowing out in the using process, the use safety of the valve is improved, the uniform stress of the gland and the uniform stress of the packing can be fully ensured, and the sealing performance is ensured. And, set up dish spring 47 and nut on gland 19 and compress tightly, guarantee because long-time compress tightly and the temperature influence, the loose problem of revealing that leads to of packing fully guarantees that 16 are in the compression state constantly, guarantees sealing performance. And 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, and the three O-shaped ring grooves are respectively provided with one O-shaped ring 45, so that the sealing performance is fully ensured, and the external leakage of the valve is avoided.
In the 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 connected with the bracket 20 through fasteners, and the left side and the right side of the bracket are respectively provided with a lifting lug 37 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 pressure plate 11, a spring retainer 12, a nut, and a bolt, which together form a sealing system of the butterfly valve, and can perform a bidirectional sealing capability, and the butterfly plate 2 adopts a hollow design, which greatly reduces a flow resistance during a liquid flowing process.
In this embodiment, four upper and lower bearing sleeves 23 are arranged between the valve body 1 and the valve rod 3, so that the frictional resistance of the valve in the opening and closing process is reduced, and 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 large-caliber butterfly valve.
2) The butterfly plate adopts a hollow design, greatly reduces the flow resistance coefficient in the liquid flowing process, increases the flow,
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 the valve has bidirectional sealing performance; the pressing plate, the spring retainer ring and the bolt and the nut jointly 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 the double-disk seat is compressing tightly the even atress of in-process, improves sealing performance.
4) The packing pressing ring, the split ring and the packing gland jointly form a blowout prevention device, so that the valve rod is prevented from blowing out in the use process, and the use safety of the valve is improved; the upper 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 the packing position is fully ensured; the packing gland is provided with three groups of disc springs for compensating the shrinkage of the packing after extrusion deformation, so that the packing is fully compressed, and the sealing performance of the packing is fully ensured.
5) The design of the lifting lugs on the two sides of the support enables the valve to be more convenient in the lifting process.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.

Claims (10)

1. A maritime work ultralow-temperature double-valve-seat double-seal butterfly valve is characterized by comprising a valve rod, an actuator, a support, a valve cover, a valve body, a butterfly plate and a bottom cover;
the actuator is arranged at one end of the valve rod and controls the valve rod to rotate in a shaft mode through a worm gear, and the bottom cover is arranged on the end face of the other end of the valve rod;
the support, the valve cover and the valve body which are mutually jointed and sealed are sequentially sleeved on the valve rod of the valve cover from the actuator, 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 section of valve rod is provided with the butterfly plate, and the valve rod shaft rotates to drive the butterfly plate to rotate so as to enable the inlet cavity and the outlet cavity to be communicated or divided;
the butterfly valve comprises a valve body and is characterized in that 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 the first valve seat and the second valve seat are used for being in contact sealing with the butterfly plate when the butterfly plate is closed, so that the inlet cavity and the outlet cavity are separated.
2. The marine ultra-low temperature double seat dual seal butterfly valve of claim 1, wherein said one-section stem is fixed to said butterfly plate by a locking pin, and said butterfly plate is located on one side of said one-section stem, and said locking pin penetrates said other side of said one-section stem from said one-section stem side.
3. The marine ultra-low temperature double-seat double-seal butterfly valve as claimed in claim 1, wherein metal corrugated composite gaskets are disposed 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 corrugated composite gaskets are made of non-asbestos non-metallic materials bonded on the surface of the corrugated metal frame.
4. The marine ultra-low temperature double-seat double-seal butterfly valve as claimed in claim 1, wherein a packing gland, a packing pressing ring, a packing and a packing pad are sequentially arranged between the valve cover and the valve rod from the 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.
5. The marine ultra-low temperature double-seat double-seal butterfly valve as claimed in claim 4, wherein the packing is of a ring structure and is 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.
6. The marine ultra-low temperature double-seat double-seal butterfly valve according to claim 4, wherein a set of split rings is disposed between the packing gland and the packing pressing ring.
7. The marine ultra-low temperature double-seat double-seal butterfly valve of claim 4, wherein the packing gland is fixed at one end of the valve cover by a fastener, and the fastener and the packing gland are provided with a disc spring.
8. The marine ultra-low temperature double-seat double-seal butterfly valve according to any one of claims 1 to 7, wherein the valve cover and the valve body and the valve cover and the bracket are connected by a fastener.
9. The marine ultra-low temperature double-seat double-seal butterfly valve according to any one of claim 8, wherein a lifting lug is provided at each side of the support.
10. The marine ultra-low temperature double-seat dual-seal butterfly valve of claim 1, wherein the butterfly plate is of hollow design.
CN202111228570.2A 2021-10-21 2021-10-21 Maritime work ultralow temperature double-valve-seat double-seal butterfly valve Pending CN113983176A (en)

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CN202111228570.2A CN113983176A (en) 2021-10-21 2021-10-21 Maritime work ultralow temperature double-valve-seat double-seal butterfly valve

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CN202111228570.2A CN113983176A (en) 2021-10-21 2021-10-21 Maritime work ultralow temperature double-valve-seat double-seal butterfly valve

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CN113983176A true CN113983176A (en) 2022-01-28

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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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