CN108443524A - The underwater flat gate valve of subsea tree - Google Patents
The underwater flat gate valve of subsea tree Download PDFInfo
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- CN108443524A CN108443524A CN201810490275.6A CN201810490275A CN108443524A CN 108443524 A CN108443524 A CN 108443524A CN 201810490275 A CN201810490275 A CN 201810490275A CN 108443524 A CN108443524 A CN 108443524A
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- valve
- sealing
- seal
- deck
- flashboard
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- 238000007789 sealing Methods 0.000 claims abstract description 101
- 230000007246 mechanism Effects 0.000 claims abstract description 13
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- 238000012856 packing Methods 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 235000008227 Illicium verum Nutrition 0.000 claims description 16
- 240000007232 Illicium verum Species 0.000 claims description 16
- 125000006850 spacer group Chemical group 0.000 claims description 14
- 229920000459 Nitrile rubber Polymers 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 229910000701 elgiloys (Co-Cr-Ni Alloy) Inorganic materials 0.000 claims description 6
- 210000004907 gland Anatomy 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
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- 150000001875 compounds Chemical class 0.000 claims description 3
- 229920002530 polyetherether ketone Polymers 0.000 claims description 3
- 229910001060 Gray iron Inorganic materials 0.000 claims description 2
- 238000005984 hydrogenation reaction Methods 0.000 claims description 2
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- 238000005260 corrosion Methods 0.000 abstract description 19
- 230000007797 corrosion Effects 0.000 abstract description 18
- 238000013036 cure process Methods 0.000 abstract description 6
- 241000283216 Phocidae Species 0.000 description 41
- 239000013535 sea water Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
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Classifications
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0227—Packings
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/12—Covers for housings
-
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0281—Guillotine or blade-type valves, e.g. no passage through the valve member
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The present invention relates to a kind of subsea tree underwater flat gate valve, including valve body, valve deck, flashboard, holder, valve seats；The first sealing structure is equipped between valve body and valve deck；Second seals structure is equipped between valve seat and valve body；Third sealing structure is equipped between valve deck and valve rod；Gasket ring and valve stem nut are installed, valve rod stretches out valve deck and is threadedly coupled with valve stem nut across gasket ring in holder；Valve stem nut upper end connects actuating sleeve, and actuating sleeve connects upper valve rod, upper valve rod connection valve position indicating mechanism；Upper valve rod connects ROV interfaces by spring bearing；Installation is provided with the initial precompressed disc spring than pressure on valve seat；The pressure release passage extended equipped with upstream direction in valve body, unidirectional relief valve is equipped on valve body valve chamber internal channel；Valve seat intermediate symmetrical position is removable to be equipped with flashboard guiding mechanism.The present invention has good seal performance, has flashboard guide function, opens and closes compensation function；The advantages that corrosion resistant intensity, corrosion resistance are strong, and service life is long is improved to flashboard and valve seat cure process simultaneously.
Description
Technical field
The invention belongs to underwater valve technology fields, more particularly to a kind of underwater flat gate valve of subsea tree.
Background technology
After petrol resources exploitation is redirected into the 1980s from land, underwater key equipment such as seabed clustered well heads,
Dry type, wet-type christmas tree, more well casings converge, and seabed metering device etc. is developed, the innovation skill such as underwater supercharging, underwater oil vapor treatment
Art steps into field test and industrial applications stage, and underwater remote-control Work robot operating water depth is underwater oily up to 4 000m
Gas field development pattern becomes increasingly abundant, using the record fast refresh of the depth of water, subsea fields tieback distance.From several meters of the depth of water to number
Km, from marine large oil and gas fields to marginal field, from the North Sea, the Gulf of Mexico to Brazil so that China's eastern South China Sea all
There are many successful stories.The oil gas field depth of water of current application subsea production system exploitation is recorded as Gulf of Mexico Peidido
Mesh, maximum water depth 2943m；Full subsea production system development of fields and the seabed multiphase delivery pipe by 143km are applied simultaneously
The direct tieback in road has become a reality in the gas fields Norway Si Nuohei to land terminal.Subsea production system is with becoming economical and efficient
Develop one of the important technical in deep water hydrocarbon field and marine marginal field.
Petrol resources exploitation turns to ocean from land.Preceding sea turns to deep-sea and has become inexorable trend, Offshore Engineering equipment
As one of high-end equipment manufacture emphasis.Underwater gate valve is applied to adopt defeated well head and subsea production tree under water.It is used with traditional land
The environment of gate valve difference seawater is special, the environmental pressure generated such as corrosion and the adjoint sea water advanced increase of seawater, right
Load performance, corrosion resistant performance, sealing performance, performance, service life and maintenance period of deep-sea gate valve etc. have higher
Requirement.
Deep-sea gate valve should have the characteristics that：(1) deep-sea gate valve is operated in briny environment, operating depth from hundreds of meters to
Several kms will not only bear internal oil gas medium pressure, still suffer from extraneous seawater pressure.
(2) deep-sea gate valve is directly exposed in seawater, and valve body material, sealing element etc. not only want resistance to H2S to corrode, and also want
Seawater corrosion resistance also needs to consider spot corrosion, crevice corrosion and galvanic corrosion etc. in addition；
(3) for the underwater production technology in deep-sea, deep-sea gate valve can only be controlled by remote operation or ROV
System, therefore deep-sea gate valve must integrated driving device；
(4) it for deep-sea gate valve reliability and safety, needs to introduce failure to safety principle in gate valve design, that is, works as
When underwater gate valve breaks down, it is able to maintain that safe condition or is shifted to safe condition.
Thus the present invention design one kind can ROV driving carry compensating chain device, good seal performance, have flashboard be oriented to work(
Can, it open and close compensation function；Improve with valve seat cure process that corrosion resistant intensity, corrosion resistance are strong, and extending makes to flashboard simultaneously
With the service life, when underwater gate valve breaks down, the underwater flat gate valve that is able to maintain that safe condition or is shifted to safe condition.
Invention content
The present invention provides a kind of good seal performance to solve technical problem present in known technology, and there is flashboard to be oriented to
Function opens and closes compensation function；It is strong that corrosion resistant intensity, corrosion resistance improved to flashboard and valve seat cure process simultaneously, is extended
The underwater flat gate valve of the subsea tree of service life.
The present invention is adopted the technical scheme that solve technical problem present in known technology：
A kind of subsea tree underwater flat gate valve, including valve body, the valve deck being mounted on valve body, the valve body and valve
The first sealing structure is equipped between lid；The upper end of valve deck is equipped with holder, and valve seat, the valve seat are equipped in the middle part of the runner of valve body
Second seals structure is equipped between valve body；The centre of valve seat is equipped with longitudinally movable flashboard；The flashboard is tied by nesting
Structure connects valve rod, and the upper end of the valve rod stretches out valve deck, third sealing structure is equipped between valve deck and valve rod；Described
Gasket ring and valve stem nut are installed in holder, spring bearing is equipped between the valve stem nut and holder, gasket ring, the valve rod is stretched
Go out valve deck to be threadedly coupled with valve stem nut across gasket ring；The upper end of the valve stem nut passes through pin connection actuating sleeve, the driving
The upper end of set passes through pin connection upper valve rod, the upper valve rod connection valve position indicating mechanism；The upper valve rod passes through support shaft
Hold connection ROV interfaces；The ROV structures are mounted on valve body fixed frame；It is characterized in that：Installation is provided with just on the valve seat
Begin than the precompressed disc spring of pressure；The pressure release passage extended equipped with upstream direction in the valve body, pacifies on valve body valve chamber internal channel
Equipped with the unidirectional relief valve upstream released stress；The intermediate symmetrical position of the valve seat is removable to be equipped with flashboard Guiding machine
Structure.
The present invention can also use following technical measures：
Further include pressure equaliser, the pressure equaliser is connected to by oil pipe with rack bore.
The pressure equaliser includes gray iron, piston and the cylindrical spring being arranged between piston and cylinder cap,
The valve deck is mounted on the upper end of cylinder body by fastener, and sealing ring is equipped between the cylinder body and cylinder cap；The cylinder cap
Upper end is connected with the top connection being connected to surrounding medium；Hydraulic pressure oil medium is full of in the lower section cylinder body of the piston；In cylinder body
Lower end be equipped with lower contact, the lower contact is connected to by oil pipe with rack bore.
It is in the identical guide plate of mirror image that the flashboard guiding mechanism, which includes two, and the guide plate includes being oriented to
Plate ontology, the guide plate ontology are equipped with the centre bore being equipped with valve seat, and the center of the centre bore is located at guide plate ontology
The top position in middle part, the guiding stroke for being oriented to stroke and being less than valve seat lower guide plates of valve seat top guide plate；It is leading
It is equipped with flanging to two lateral same directions of plate ontology；Two guide plates in mirror symmetry enclose one and are oriented to and valve plate shifting
The consistent guide space in dynamic direction；The flashboard is formed with guide plate medial surface body contacts and is sealed in guide space, and
It is moved up and down along guide space in the drive lower flashboard of valve rod, realization is turned on and off state.
First sealing structure includes primary seal and time sealing, and the primary seal is metal illiciumverum gasket ring, wherein
The lower surface of the valve deck is equipped with primary seal mounting groove, is equipped in the primary seal mounting groove and coordinates with metal illiciumverum gasket ring
Outer inclined-plane, the diameter of the primary seal mounting groove is less than the outer diameter of metal illiciumverum gasket ring so that metal illiciumverum gasket
The upper part of ring is inlaid in primary seal mounting groove, and degree wedge-type seal face is matched on the lower part of the metal illiciumverum gasket ring and valve body
It closes；Described sealing uses 0 type sealing ring of hydrogenated nitrile-butadiene rubber, and the upper surface of the valve body is equipped with time sealing mounting groove, above-mentioned
0 type sealing ring of hydrogenated nitrile-butadiene rubber be inlaid in time in sealing mounting groove；Sealing detection channel, the sealing are equipped on valve deck
Sense channel is extended to by the outer wall of valve deck between primary seal and secondary sealing；Seal plug is installed on valve deck.
The second seals structure uses double sealing structure, i.e., two seals slot, institute are equipped on the outer end face of valve seat
It states and is mounted on lip-type packing in seal groove, two lip-type packings are backwards to setting.
The third sealing structure uses triple combined sealing structures, respectively the first resealing structure, the second resealing
Structure and third resealing structure；The valve rod and valve deck are equipped with the conical seal (contact) face of cooperation, two conical seal (contact) face contacts
The first resealing structure is formed, packing seal slot is equipped on the top valve rod of the first resealing structure, the filler is close
Packing seal group is installed in sealing groove；Form the second resealing structure；Spacer ring is installed on the top of the packing seal group, it is described every
The upper surface of ring is inserted into the spacer ring mounting groove of sealing gland lower face, and the sealing gland is fixedly mounted on by fastener
On valve deck；It is respectively equipped with lip seal circle between the spacer ring and valve rod, spacer ring and valve deck, forms third resealing structure.
The packing seal group be PTFE, PEEK and ELGILOY composition lip seal structure or C-shaped ring, PTFE,
The compound sealing structure of ELGILOY lip seal components combination.
The outer surface of the flashboard and seal receptacle is coated with carbide layers.
The valve body, valve seat, the inner surface of valve deck and media contact position Jun Dui are welded with UNS N06625 built-up welding layer thickness
2.5mm~3mm.
The present invention is had the following advantages using above-mentioned technical proposal：
1, this deep-sea gate valve design uses run-in index single disc, flashboard that valve base chamber is provided with detachable guide plate, can
Valve body guidance tape processing cumbersome process is effectively reduced, it can be achieved that replacing and safeguarding online, prevents flashboard in longitudinal movement
Offset deviation is generated, ensures product hermeticity energy.Compared with " guidance tape " being processed with conventional panel gate valve body, this detachable guiding
Harden structure can process the difficulty of guidance tape to avoid valve body and the replacement easy to disassemble of detachable guide plate can carry out on-line maintenance, together
When also avoid the cumbersome process of valve body processing guidance tape, reduce processing cost, convenient online dismounting and safeguard solve routine
Flat gate valve structure such as body cavity need to do special corrosion resistant or cure process band is oriented to the problem of band structure cannot achieve.
2, the critical seals part such as flashboard of the present invention, valve seat is all made of the processing of WC surface spraying technical cues, ensure that coating
With the bond strength and hardness of matrix, product service life and sealing performance can be effectively improved.
3, underwater gate valve, also subject to hydrostatic pressure, is cut in order to prevent under deep water conditions other than bearing to end interior external pressure
Only leakage or seawater enter valve body, and the first sealing structure between valve body and valve deck uses quoit sealing+O-ring primary and secondary
Sealing structure form；Wherein metal o-ring prevents cut-off the outside as primary seal, and O-shaped sealing is as time sealing for preventing sea
Water metal valve body, and then improve the sealing performance of underwater gate valve.
4, it is the important channel of medium leakage at valve rod, goes out leakage in valve rod in order to prevent, three are used at valve stem seal
Resealing structure；Effectively increase the sealing performance of underwater gate valve.
5, the present invention can ROV be drivingly connected, in order to reduce starting torque, reduce the requirement in source input to torque, reduction
Requirement to upper operating system pressure-bearing, it is ensured that test and service life are equipped with and are connected to pressure equaliser with rack bore, should
Device has the function of to drive compensation balance, pressure equaliser that can not only make Direct Travel opening/shutting valve when gate valve opens and closes under water
Upper operating system external and internal pressure is balanced the purpose for playing protection equipment, product can also be made to open by pressure balance principle
Close torque reduction.Pre-tightening function by compensating cylinder inner elastomeric element makes valve pressurising inside operating system under non-open/close states
Prevent external seawater corrosion-damaged into causing.
6, all vital parts and structure are optimized by finite element analysis, with media contact position built-up welding UNS
N06625
Built-up welding layer thickness 2.5mm~3mm；Improve anti-corrosion ability.
In conclusion the present invention has good seal performance, there is flashboard guide function, open and close compensation function；Simultaneously to lock
Plate improves the advantages that corrosion resistant intensity, corrosion resistance are strong, and service life is long with valve seat cure process.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is A-A sectional views in Fig. 1；
Fig. 3 is B-B sectional views in Fig. 2；
Fig. 4 is the portions I enlarged drawing in Fig. 3；
Fig. 5 is the portions II enlarged drawing in Fig. 3；
Fig. 6 is the portions III enlarged drawing in Fig. 3；
Fig. 7 is flashboard guiding mechanism structural schematic diagram；
Fig. 8 is guide board structure schematic diagram；
Fig. 9 is pressure equaliser structural schematic diagram；
Figure 10 is C-C sectional views in Fig. 9；
Figure 11 is IV partial enlarged views in Fig. 3.
In figure：1, valve body；1-1, pressure release passage；1-2, unidirectional relief valve；2, valve deck；3, the first sealing structure；3-1, master
Sealing；3-10, primary seal mounting groove；3-2, secondary sealing；3-20, secondary sealing mounting groove；3-3, sealing detection channel；3-4, sealing
It is stifled；4, holder；5, valve seat；6, second seals structure；6-1, seal groove；6-2, lip-type packing；7, flashboard；8, valve rod；9-1、
First resealing structure；9-10, conical seal (contact) face；9-2, the second resealing structure；9-20, packing seal group；9-3, third weight
Sealing structure；9-30, lip seal circle；9-4, spacer ring；10, gasket ring；11, valve stem nut；12, spring bearing；13, actuating sleeve；
14, upper valve rod；15, Fa Wei indicating mechanisms；16, fixed frame；17, butterfly spring；18, flashboard guiding mechanism；18-1, guide plate；18-
10, guide plate ontology；18-11, centre bore；18-2, flanging；19, pressure equaliser；19-1, cylinder body；19-2, cylinder cap；19-
3, piston；19-4, cylindrical spring；19-5, sealing ring；19-6, top connection；19-7, lower contact；20, oil pipe.
Specific implementation mode
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, and coordinate attached drawing
Detailed description are as follows：
It please refers to Fig.1 to Fig.3, a kind of underwater flat gate valve of subsea tree, including valve body 1, is mounted on valve body
Valve deck 2 is equipped with the first sealing structure 3 between the valve body and valve deck；The upper end of valve deck is equipped with holder 4, in the runner of valve body
Portion is equipped with valve seat 5, and second seals structure 6 is equipped between the valve seat and valve body；The centre of valve seat is equipped with longitudinally movable
Flashboard 7；The flashboard connects valve rod 8 by nested structure, and valve deck is stretched out in the upper end of the valve rod, between valve deck and valve rod
Equipped with third sealing structure；Gasket ring 10 and valve stem nut 11, the valve stem nut and holder, pad are installed in the holder
Spring bearing 12 is equipped between ring, the valve rod stretches out valve deck and is threadedly coupled with valve stem nut across gasket ring；The valve stem nut
11 upper end passes through pin connection upper valve rod 14, the upper valve rod by pin connection actuating sleeve 13, the upper end of the actuating sleeve
Connection valve position indicating mechanism 15；The upper valve rod 14 connects ROV interfaces 15 by spring bearing；The ROV structures are mounted on valve
On body fixed frame 16；Installation is provided with the initial precompressed disc spring 17 than pressure on the valve seat, the seal pressure in the course of work by
Pressure medium and butterfly spring 17 provide jointly, and the stress of valve rod is only the frictional force of flashboard 7 and 5 surface of valve seat.It is initial close generating
For envelope than pressure aspect, it is zero that single disc, which generates initial sealing than pressing required valve rod power, therefore such gate valve is opened lightly, flexibly；
In addition, flashboard 7 can float according to the variation of pressure, the possibility being stuck so as to avoid flashboard；Be equipped in the valve body to
The pressure release passage 1-1 that updrift side extends, is equipped with the unidirectional relief valve upstream released stress on valve body valve chamber internal channel
1-2 please refers to Fig.1 1, and when gate valve is closed, confined space is formed in cavity, can when chamber pressure steeply rises
Pressure is discharged to upstream end by unidirectional relief valve and not only acts as decompression protection function, while protection downstream dress can also be played
Set the effect with operator；In order to ensure that flashboard is moved up and down according to preset track, in the intermediate symmetrical position of the valve seat
It is removable that flashboard guiding mechanism 18 is installed.
The present invention can also use following technical measures：
Preferably, Fig. 9 and Figure 10 are please referred to, further includes pressure equaliser 19, the pressure equaliser passes through oil pipe
It is connected to 4 inner cavity of holder.The pressure equaliser 19 includes cylinder body 19-1, cylinder cap 19-2, piston 19-3 and is arranged in work
Cylindrical spring 19-4, the valve deck 19-2 between plug and cylinder cap are mounted on the upper end of cylinder body 19-1 by fastener, described
Sealing ring 19-5 is equipped between cylinder body 19-1 and cylinder cap 19-2；The upper end of the cylinder cap be connected be connected to surrounding medium it is upper
Connector 19-6；Hydraulic pressure oil medium is full of in the lower section cylinder body of the piston；It is equipped with lower contact 19-7 in the lower end of cylinder body 19-1,
The lower contact is connected to by oil pipe 20 with 4 inner cavity of holder.Pressure equaliser can not only make Direct Travel opening/shutting valve top
Operating system external and internal pressure is balanced the purpose for playing protection equipment, and product can also be made to open and close by pressure balance principle and turned round
Square reduces, and reduces the requirement in the source inputted to torque, reduces the requirement to upper operating system pressure-bearing, it is ensured that gate valve is tested and made
Use the service life；Making valve by the elastic element preload function of cylinder interior, pressurising prevents inside operating system under non-open/close states
External seawater is corrosion-damaged into causing.
Preferably, Fig. 7 and Fig. 8 are please referred to, the flashboard guiding mechanism 18 includes two identical in mirror image
Guide plate 18-1, the guide plate include guide plate ontology 18-10, and the guide plate ontology is equipped with the center being equipped with valve seat
The center of hole 18-11, the centre bore are located at position top in the middle part of guide plate ontology, the guiding of valve seat top guide plate
Stroke is less than the guiding stroke of valve seat lower guide plates；It is equipped with flanging 18-2 in two lateral same directions of guide plate ontology；Two
A guide plate in mirror symmetry encloses one and is oriented to the guide space consistent with valve plate moving direction；Described in guide space
Flashboard is formed with guide plate medial surface body contacts and is sealed, and is moved down on the drive lower flashboard of valve rod is along guide space
Dynamic, realization is turned on and off state.Valve body guidance tape processing cumbersome process can effectively be reduced, it can be achieved that online replace and safeguard,
It prevents flashboard from generating offset deviation in longitudinal movement, ensures product hermeticity energy.
Preferably, referring to Fig. 4, first sealing structure 3 includes primary seal 3-1 and time sealing 3-2, the primary seal
For metal illiciumverum gasket ring, wherein the lower surface of the valve deck is equipped with primary seal mounting groove 3-10, the primary seal mounting groove
It is interior equipped with the outer inclined-plane coordinated with metal illiciumverum gasket ring, the diameter of the primary seal mounting groove is less than metal illiciumverum gasket
The outer diameter of ring so that the upper part of metal illiciumverum gasket ring is inlaid in primary seal mounting groove 3-10, primary seal mounting groove and close
Contact of incline plane inside and outside packing ring, and compress and form sealing；The angle of gasket ring and primary seal mounting groove inclined-plane is generally
23°；The cooperation of wedge-type seal face is spent on the lower part of the metal illiciumverum gasket ring and valve body；Using above-mentioned main seal structure as Jie
When matter pressure rise, metal illiciumverum gasket ring is pushed to be close to valve body, pressure more high compressive force is bigger, and sealing effect is better；Tool
There is the features such as high pressure resistant, sealed reliable, there is the operating mode of fluctuation especially suitable for pressure and temperature.Described sealing is using hydrogenation fourth
The upper surface of 0 type sealing ring of nitrile rubber, the valve body is equipped with time sealing mounting groove 3-20, and above-mentioned 0 type of hydrogenated nitrile-butadiene rubber is close
Seal is inlaid in time sealing mounting groove；Secondary sealing improves the sealing of underwater gate valve for preventing seawater metal valve body
Performance.Preferably, for the ease of the sealing performance of inspection primary seal and time sealing, sealing detection channel 3-3 is equipped on valve deck,
The sealing detection channel is extended to by the outer wall of valve deck between primary seal 3-1 and secondary sealing 3-2；Seal plug is installed on valve deck
3-4。
Preferably, referring to Fig. 5, being equipped with second seals structure 6 between the valve seat and valve body uses double sealing structure,
It is equipped with two seals slot 6-1 i.e. on the outer end face of valve seat, lip-type packing 6-2, two lips are mounted in the seal groove
Shape sealing ring is backwards to setting.Using above-mentioned double sealing structure, sealing performance is increased with the raising of pressure, is realized " from close
Envelope " effect.In addition, it can reduce friction, service life is longer, and more conventional rubber seal with O ring, this structure valve seat can fit
For under more harsh environment.It imports and exports both ends and uses identical valve seat construction, on the basis of ensureing to open light and handy, flexible
The function of two way seal is realized, there is good leakproofness and reliability.Two lip-type packings are backwards to being arranged, when runner comes
The first lip-type packing, which struts compression to play before sealing function cooperatively forms valve with sealing surface, when pressure seals guarantee sealing performance.
When one end, valve base sealing corrupted media pressure comes lumen, the second lip-type packing compression is strutted play sealing function with it is close
Cover cooperatively forms preload than swaging at being sealed after valve, it is ensured that sealing performance.So valve seat construction can be effectively formed dual-seal,
There is fairly good firm sealing effect for the special media such as toxic, inflammable, explosive.
Preferably, referring to Fig. 6, the third sealing structure 9 uses triple combined sealing structures, the respectively first weight close
Seal structure 9-1, the second resealing structure 9-2 and third resealing structure 9-3；The valve rod 8 and valve deck 2 are equipped with the cone of cooperation
Shape sealing surface 9-10, two conical seal (contact) faces contact to form the first resealing structure 9-1, and conical seal (contact) face finish reaches Ra0.2
Effective " very stiff and demanding " sealing can be formed above by poppet stem preload；On the top valve rod of the first resealing structure
Equipped with packing seal slot, packing seal group 9-20 is installed in the packing seal slot；Form the second resealing structure, valve rod 8
High-pressure sealing stuffing group is provided between valve deck 2 to ensure still form effective sealing in the failure of the first resealing；This is filled out
Material group is special multiple design, can be realized multi-stage sealed；Spacer ring is installed on the top of the packing seal group, the spacer ring it is upper
End face is inserted into the spacer ring mounting groove of sealing gland lower face, and the sealing gland is fixedly mounted on valve deck by fastener
On；It is respectively equipped with lip seal circle 9-30 between the spacer ring 9-4 and valve rod, spacer ring and valve deck, forms third resealing structure；
In valve production, under room temperature operating mode, it is related to cost factor, due to the extensive application of "O"-ring, valve at home
It is less using lip seal circle.But under special operation condition, such as：In the case of low leakage, ultralow temperature or special media,
Rubber round section joint ring cannot be met the requirements, and therefore, must just select the sealing of lip seal circle to carry out replacement can meet use
It is required that.The advantages of lip seal circle, is that it can realize " self sealss " as being enclosed " O ", i.e., its sealing performance is with pressure
It increases and increases.In addition, it can reduce friction, service life is longer, can be suitably used under more harsh environment.
Preferably, the packing seal group by material be PTFE, PEEK and ELGILOY form form lip seal structure or
The compound sealing structure that person's C-shaped ring, PTFE, ELGILOY lip seal component combine.
Preferably, in order to ensure the bond strength and hardness of coating and matrix, product service life and close can be effectively improved
Sealing property；The outer surface of the flashboard and seal receptacle is coated with carbide layers.
Preferably, in order to further increase the corrosion resistance of gate valve critical component, the valve body, valve seat, valve deck it is interior
Surface is welded with UNS N06625 built-up welding layer thickness 2.5mm~3mm with media contact position Jun Dui.
In conclusion particular/special requirement and technical essential of the present invention according to seabed gate valve, determine from simple to complexity, from weight
Point, which is studied, arrives application study, the overall study thinking of technological problems after first customer service technical problem, to complete this underwater gate valve
Innovative design.The present invention has good seal performance, has flashboard guide function, opens and closes compensation function；Simultaneously to flashboard and valve seat
Cure process improves the advantages that corrosion resistant intensity, corrosion resistance are strong, and service life is long.
The above is only the preferred embodiments of the present invention, and is not intended to limit the present invention in any form,
Every any simple modification made to the above embodiment according to the technical essence of the invention, equivalent variations and modification, belong to
In the range of technical solution of the present invention.
Claims (10)
1. a kind of subsea tree underwater flat gate valve, including valve body, the valve deck being mounted on valve body, the valve body and valve deck
Between be equipped with the first sealing structure；The upper end of valve deck is equipped with holder, is equipped with valve seat in the middle part of the runner of valve body, the valve seat and
Second seals structure is equipped between valve body；The centre of valve seat is equipped with longitudinally movable flashboard；The flashboard passes through nested structure
Valve rod is connected, the upper end of the valve rod stretches out valve deck, third sealing structure is equipped between valve deck and valve rod；In the branch
Gasket ring and valve stem nut are installed in frame, spring bearing is equipped between the valve stem nut and holder, gasket ring, the valve rod stretches out
Valve deck is threadedly coupled across gasket ring with valve stem nut；The upper end of the valve stem nut passes through pin connection actuating sleeve, the actuating sleeve
Upper end pass through pin connection upper valve rod, the upper valve rod connection valve position indicating mechanism；The upper valve rod passes through spring bearing
Connect ROV interfaces；The ROV structures are mounted on valve body fixed frame；It is characterized in that：Installation is provided with initial on the valve seat
Than the precompressed disc spring of pressure；The pressure release passage extended equipped with upstream direction in the valve body, is installed on valve body valve chamber internal channel
There is the unidirectional relief valve upstream released stress；The intermediate symmetrical position of the valve seat is removable to be equipped with flashboard guiding mechanism.
2. the underwater flat gate valve of subsea tree according to claim 1, it is characterised in that：It further include pressure balance dress
It sets, the pressure equaliser is connected to by oil pipe with rack bore.
3. the underwater flat gate valve of subsea tree according to claim 2, it is characterised in that：The pressure equaliser
Including gray iron, piston and the cylindrical spring being arranged between piston and cylinder cap, the valve deck is mounted on by fastener
The upper end of cylinder body is equipped with sealing ring between the cylinder body and cylinder cap；The upper end of the cylinder cap is connected with to be connected with surrounding medium
Logical top connection；Hydraulic pressure oil medium is full of in the lower section cylinder body of the piston；It is equipped with lower contact in the lower end of cylinder body, under described
Connector is connected to by oil pipe with rack bore.
4. the underwater flat gate valve of subsea tree according to claim 1, it is characterised in that：The flashboard guiding mechanism
It is in the identical guide plate of mirror image including two, the guide plate includes guide plate ontology, on the guide plate ontology
Equipped with the centre bore being equipped with valve seat, the center of the centre bore is located at position top in the middle part of guide plate ontology, the valve seat
The guiding stroke for being oriented to stroke and being less than valve seat lower guide plates of top guide plate；In two lateral same directions of guide plate ontology
Equipped with flanging；Two guide plates in mirror symmetry enclose one and are oriented to the guide space consistent with valve plate moving direction；
The flashboard is formed with guide plate medial surface body contacts and is sealed in guide space, and in the drive lower flashboard of valve rod along guiding
It is moved up and down in space, realization is turned on and off state.
5. the underwater flat gate valve of subsea tree according to claim 1, it is characterised in that：First sealing structure
Including primary seal and time sealing, the primary seal is metal illiciumverum gasket ring, wherein the lower surface of the valve deck is close equipped with master
Mounting groove is sealed, the outer inclined-plane coordinated with metal illiciumverum gasket ring, the primary seal installation are equipped in the primary seal mounting groove
The diameter of slot is less than the outer diameter of metal illiciumverum gasket ring so that the upper part of metal illiciumverum gasket ring is inlaid in primary seal peace
Tankage, degree wedge-type seal face cooperation on the lower part of the metal illiciumverum gasket ring and valve body；Described sealing is using hydrogenation fourth
The upper surface of 0 type sealing ring of nitrile rubber, the valve body is equipped with time sealing mounting groove, above-mentioned 0 type sealing ring of hydrogenated nitrile-butadiene rubber
It is inlaid in time sealing mounting groove；Sealing detection channel is equipped on valve deck, the sealing detection channel is prolonged by the outer wall of valve deck
It extends between primary seal and secondary sealing；Seal plug is installed on valve deck.
6. the underwater flat gate valve of subsea tree according to claim 1, it is characterised in that：The second seals structure
Using double sealing structure, i.e., two seals slot is equipped on the outer end face of valve seat, it is close to be mounted on lip in the seal groove
Seal, two lip-type packings are backwards to setting.
7. the underwater flat gate valve of subsea tree according to claim 1, it is characterised in that：The third sealing structure
Using triple combined sealing structures, respectively the first resealing structure, the second resealing structure and third resealing structure；It is described
Valve rod and valve deck are equipped with the conical seal (contact) face of cooperation, and two conical seal (contact) faces contact to form the first resealing structure, first
The top valve rod of resealing structure is equipped with packing seal slot, and packing seal group is equipped in the packing seal slot；Shape
At the second resealing structure；Spacer ring is installed on the top of the packing seal group, and the upper surface of the spacer ring is inserted into sealing gland
In the spacer ring mounting groove of lower face, the sealing gland is fixedly mounted on by fastener on valve deck；The spacer ring and valve rod, every
It is respectively equipped with lip seal circle between ring and valve deck, forms third resealing structure.
8. the underwater flat gate valve of subsea tree according to claim 7, it is characterised in that：The packing seal group is
The lip seal structure or C-shaped ring of PTFE, PEEK and ELGILOY composition, PTFE, ELGILOY lip seal component combine
Compound sealing structure.
9. the underwater flat gate valve of subsea tree according to claim 1, it is characterised in that：The flashboard and seal receptacle
Outer surface be coated with carbide layers.
10. the underwater flat gate valve of subsea tree according to claim 1, it is characterised in that：The valve body, valve seat,
The inner surface of valve deck is welded with UNS N06625 built-up welding layer thickness 2.5mm~3mm with media contact position Jun Dui.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810490275.6A CN108443524A (en) | 2018-05-21 | 2018-05-21 | The underwater flat gate valve of subsea tree |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810490275.6A CN108443524A (en) | 2018-05-21 | 2018-05-21 | The underwater flat gate valve of subsea tree |
Publications (1)
| Publication Number | Publication Date |
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| CN108443524A true CN108443524A (en) | 2018-08-24 |
Family
ID=63205215
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810490275.6A Pending CN108443524A (en) | 2018-05-21 | 2018-05-21 | The underwater flat gate valve of subsea tree |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662172A (en) * | 2018-06-06 | 2018-10-16 | 中国船舶重工集团公司第七二五研究所 | The one-way flow used in a kind of deep water is from underwater gate valve of releasing |
| CN109322635A (en) * | 2018-12-13 | 2019-02-12 | 美钻深海能源科技研发（上海）有限公司 | Underwater kit hydrogen sulfide corrosion automatic safe closing well system |
| CN110220652A (en) * | 2019-06-24 | 2019-09-10 | 吴忠仪表有限责任公司 | Deep-sea gate valve seat sealing reliability dynamic simulant test device |
| NO20190662A1 (en) * | 2019-05-23 | 2020-11-24 | Ik Norway As | A valve assembly for controlling the flow of a medium in a pipeline |
| CN112161075A (en) * | 2020-10-30 | 2021-01-01 | 中国船舶重工集团公司七五O试验场 | Underwater automatic control high-pressure valve |
| CN116537742A (en) * | 2023-07-07 | 2023-08-04 | 东营市金亿来石油机械有限公司 | Leakage-proof wellhead gate valve for petroleum exploitation |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662172A (en) * | 2018-06-06 | 2018-10-16 | 中国船舶重工集团公司第七二五研究所 | The one-way flow used in a kind of deep water is from underwater gate valve of releasing |
| CN109322635A (en) * | 2018-12-13 | 2019-02-12 | 美钻深海能源科技研发（上海）有限公司 | Underwater kit hydrogen sulfide corrosion automatic safe closing well system |
| NO20190662A1 (en) * | 2019-05-23 | 2020-11-24 | Ik Norway As | A valve assembly for controlling the flow of a medium in a pipeline |
| NO345461B1 (en) * | 2019-05-23 | 2021-02-15 | Ik Norway As | A valve assembly for controlling the flow of a medium in a pipeline |
| CN110220652A (en) * | 2019-06-24 | 2019-09-10 | 吴忠仪表有限责任公司 | Deep-sea gate valve seat sealing reliability dynamic simulant test device |
| CN112161075A (en) * | 2020-10-30 | 2021-01-01 | 中国船舶重工集团公司七五O试验场 | Underwater automatic control high-pressure valve |
| CN116537742A (en) * | 2023-07-07 | 2023-08-04 | 东营市金亿来石油机械有限公司 | Leakage-proof wellhead gate valve for petroleum exploitation |
| CN116537742B (en) * | 2023-07-07 | 2023-09-22 | 东营市金亿来石油机械有限公司 | Leakage-proof wellhead gate valve for petroleum exploitation |
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