CN209892144U - Dual plugging plug suitable for offshore floating facility sea entrance in-service plugging - Google Patents

Abstract

The utility model discloses a dual shutoff stopper suitable for sea mouth is led to marine floating facility is at labour shutoff, the double shutoff that uses when sea mouth carries out the shutoff when sea valve is examined and is torn open in labour at marine floating facility specifically says so, by the cydariform sealing device who includes cydariform sealing washer and cydariform sealing washer bottom plate, clamp plate and include the end face sealing device who comprises end face shutoff board, end face seal, combination spherical nut and constitute. The plugging plug can ensure that the second sealing can prevent seawater from entering the cabin under the condition that the first plugging is failed accidentally in the process of dismantling and inspecting the sea valve, thereby ensuring the safety of facilities.

Description

Dual plugging plug suitable for offshore floating facility sea entrance in-service plugging

[ technical field ] A method for producing a semiconductor device

The utility model relates to a double shutoff stopper suitable for marine floating facility leads to sea mouth is at double shutoff stopper of labour shutoff, especially FPSO carries out the shutoff to leading to the sea mouth when the labour is overhauld and tears open the dual shutoff stopper that uses when examining, maintaining operation with accomplishing the logical sea valve.

[ background of the invention ]

The FPSO is a central facility for offshore oil field production, is a mainstream production device for offshore oil and gas field development, integrates production command systems such as crude oil and natural gas primary processing, storage and the like, has a design life generally exceeding 30 years, but carries out special inspection every 5 years according to the specification of a classification society, and the inspection content comprises the disassembly and inspection operation of a sea valve; this operation is typically planned to be performed during the FPSO docking dock. However, when the oil tanker is docked, the operations of disengaging, towing, dock repair and the like need to occupy expensive resources such as large engineering ships, docks and the like, and the oil field stops production due to long dock repair period; therefore, from the economic aspect, shipowners and oilfield operators generally tend to perform underwater inspection instead of dock-level inspection to meet the requirements of classification society regulations when possible, and then plugging operation is required to be performed on the sea openings to assist in valve overhaul and maintenance.

As large offshore floating facilities such as an FPSO (floating production storage and offloading) have deep draught and large water pressure at a sea opening, the risk of online plugging and overhauling operation is high, and once a plugging tool is not properly selected or an operation method is mistaken, irreparable loss is caused. Therefore, when the large-scale offshore floating facility carries out sea valve overhauling and maintenance operation on the sealed sea opening in a service state, shipowners and operation companies require double sealing of the sea opening, so that the safety of the ship is not endangered due to a large amount of water entering the cabin even under the condition of one sealing failure point. At present, the plugging operation generally adopts a wooden plug mode for plugging, the reliability is poor, and no plugging tool special for plugging the sea opening of the offshore floating device exists.

[ summary of the invention ]

The to-be-solved technical problem of the utility model is to provide a double block up suitable for sea floating facility leads to sea mouth at labour shutoff.

The utility model discloses a realize above-mentioned purpose, the technical solution who adopts is:

a double plugging plug suitable for in-service plugging of a sea opening of an offshore floating facility comprises a drum-shaped sealing device arranged in the sea opening and an end face sealing device arranged outside the sea opening. The drum-shaped sealing device adopts a pressing plate to squeeze and clamp a drum-shaped sealing ring, so that the drum-shaped sealing ring expands to squeeze the pipe wall of the opening, and seawater is isolated to realize primary sealing; the end face sealing device extrudes the end face sealing ring under the action of the spherical nut to realize second sealing; the spherical center hole on the combined spherical nut matching end surface plugging plate is suitable for plugging the sea openings of ship outer plates with different line types by adjusting the angle.

The utility model provides a large-scale offshore facilities lead to no special shutoff instrument in the sea mouth of labour shutoff, adopt the risk that the wooden plug shutoff became invalid and lead to boats and ships to intake, operation safety, convenience.

[ description of the drawings ]

FIG. 1 is a schematic structural view of the present invention;

wherein: 1. a drum seal ring base plate; 2. a drum-shaped seal ring; 3. a drum-shaped seal ring pressure plate; 4. a hexagonal nut; 5. an end face seal ring; 6. an end face plugging plate; 7. and (4) combining the spherical nuts.

[ detailed description ] embodiments

The present invention will be further described with reference to the accompanying drawings 1 and the following detailed description:

firstly, cleaning marine organisms at the external sealing position in the opening to be sealed by a diver, wherein the surface is smooth and has no impurities, and the sealing reliability is ensured; then a drum-shaped sealing device consisting of a drum-shaped sealing ring bottom plate 1 with a screw rod, a drum-shaped sealing ring 2, a drum-shaped sealing ring pressing plate 3 and a hexagon nut 4 is plugged into the sea chest, and the hexagon nut 4 is screwed down, so that the drum-shaped sealing ring pressing plate 3 and the drum-shaped sealing ring bottom plate 1 extrude the drum-shaped sealing ring 2; the drum-shaped sealing ring 2 is extruded, expanded and deformed and is tightly attached to the wall of the opening, and seawater on two sides of the drum-shaped sealing ring is isolated to realize first plugging.

After the drum-shaped sealing device is installed, a diver penetrates the end face sealing device consisting of the end face sealing ring 5 and the end face plugging plate 6 through a screw rod of the drum-shaped sealing ring base plate 1, then screws the combined spherical nut 7, so that the end face sealing ring 5 between the end face plugging plate 6 and the hull outer plate is extruded and deformed, and seawater on two sides of the end face sealing ring 5 is isolated to realize second plugging.

After the plugging operation is completed, the operating personnel in the cabin disassemble and repair the sea valve and then reassemble the sea valve, and the plugging plug can be disassembled after the test is qualified. The diver loosens the combined spherical nut 7 to separate the combined spherical nut from the spherical center hole of the end face plugging plate 6, the end face plugging device is taken down after seawater enters balance internal and external pressure, then the hexagon nut 4 is loosened, the drum-shaped sealing ring 2 is restored under the self elastic action and is separated from the pipe wall, the seawater enters the inner wall of the pipe of the sea access opening, and the pressure at two sides of the drum-shaped sealing ring 2 is balanced; and taking down the plugging plug when the pressures on the two sides are balanced and no seawater flows into the sea opening, and finishing the plugging operation.

For the sea opening with the outer plate on the periphery being an irregular curved surface, the spherical surface of the combined spherical nut 7 and the spherical surface hole in the center of the end face plugging plate 6 form a sealing surface which can rotate within a certain angle to ensure that the end face plugging plate 6, the end face sealing ring 5 and the outer plate on the periphery of the sea opening are jointed to realize the second sealing.

The utility model is suitable for a valve is torn open and is examined the logical sea mouth shutoff of operation when the operation is examined specially to large-scale floating facility on sea, leads to sea mouth shutoff operation to large-scale navigation ship and is equally suitable for.

Claims (2)

1. The utility model provides a dual shutoff stopper suitable for offshore floating facility logical sea mouth is at active service shutoff, it includes the drum-shaped sealing device who installs in logical sea mouth and installs the end face seal device who leads to the outer ship board of sea mouth and constitute its characterized in that: the drum-shaped sealing device expands and extrudes the pipe wall under pressure to form a first seal; the end face sealing device extrudes the end face sealing ring under the action of the combined spherical nut to form a second seal.

2. The double block plug suitable for offshore floating facility sea entrance in-service block of claim 1, wherein: the end surface plugging plate is provided with a spherical central hole, is matched with the combined spherical nut to form spherical sealing and can rotate around the spherical surface so as to adapt to the plugging of the sea opening when the ship plate around the sea opening of the offshore facility has a certain angle or the ship plate is an irregular curved surface.

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