CN208237108U - The underwater flat gate valve of subsea tree - Google Patents
The underwater flat gate valve of subsea tree Download PDFInfo
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- CN208237108U CN208237108U CN201820768262.6U CN201820768262U CN208237108U CN 208237108 U CN208237108 U CN 208237108U CN 201820768262 U CN201820768262 U CN 201820768262U CN 208237108 U CN208237108 U CN 208237108U
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Abstract
The utility model relates to a kind of subsea tree underwater flat gate valve, including valve body, valve deck, flashboard, bracket, 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 across gasket ring with valve stem nut in bracket；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 interface by spring bearing；Installation is provided with the initial precompressed disc spring than pressure on valve seat；The pressure release passage extended in valve body equipped with upstream direction, is equipped with unidirectional relief valve on valve body valve chamber internal channel；Valve seat intermediate symmetrical position is removable to be equipped with flashboard guiding mechanism.The utility model has good seal performance, has flashboard guide function, opening and closing compensation function；It is strong that corrosion resistant intensity, corrosion resistance improved to flashboard and valve seat cure process simultaneously, the advantages that long service life.
Description
Technical field
The utility model belongs to underwater valve technology field, more particularly to a kind of underwater Flat Sluice of subsea tree
Valve.
Background technique
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 pressurization, 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 mode 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, 2 943m of maximum water depth；It is conveyed simultaneously using full subsea production system development of fields and by the seabed multiphase of 143km
The direct tieback of pipeline has become a reality in the gas field Norway Si Nuohei to land terminal.Subsea production system is becoming economical and efficient
One of the important technical in deep water hydrocarbon field and marine marginal field is developed on ground.
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 corrosion such as seawater and the environmental pressure that generates with sea water advanced increase, right
Load performance, corrosion resistant performance, sealing performance, action performance, service life and maintenance period of deep-sea gate valve etc. have higher
Requirement.
Deep-sea gate valve should have the following characteristics that (1) deep-sea gate valve work in briny environment, operating depth from several hundred rice 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 is also wanted
Seawater corrosion resistance additionally needs to consider spot corrosion, crevice corrosion and galvanic corrosion etc.；
(3) for production technology underwater for 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 utility model design one kind can ROV driving with compensating chain device, good seal performance is led with flashboard
To function, opening and closing compensation function；Corrosion resistant intensity, corrosion resistance improved to flashboard and valve seat cure process simultaneously strong, extension
Service life, when underwater gate valve breaks down, the underwater Flat Sluice that is able to maintain that safe condition or is shifted to safe condition
Valve.
Summary of the invention
The utility model is to solve technical problem present in well-known technique and provide a kind of good seal performance, has flashboard
Guide function, opening and closing compensation function；It is strong that corrosion resistant intensity, corrosion resistance improved to flashboard and valve seat cure process simultaneously, is prolonged
The underwater flat gate valve of subsea tree of service life is grown.
The utility model is adopted the technical scheme that solve technical problem present in well-known technique:
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 bracket, is equipped with valve seat, the valve seat 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 passes through nested knot
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 bracket, spring bearing is equipped between the valve stem nut and bracket, gasket ring, the valve rod is stretched
Valve deck passes through gasket ring and is threadedly coupled with valve stem nut out；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 interface；The ROV structure is mounted on valve body fixed frame；It is characterized by: installation is provided with just on the valve seat
Begin than the precompressed disc spring of pressure；The pressure release passage extended in the valve body equipped with upstream direction, 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 utility model can also use following technical measures:
It 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 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 guiding
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 of valve seat top guide plate are less than the guiding stroke of valve seat lower guide plates；It is leading
Flanging is equipped with to two sides of plate ontology to same direction；Two guide plates in mirror symmetry enclose a guiding and move with valve plate
The dynamic consistent guide space in direction；The flashboard and guide plate medial surface body contacts, which are formed, in guide space seals, and
It is moved up and down along guide space in the drive lower flashboard of valve rod, realization opens or closes 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 cooperates 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 between primary seal and secondary sealing by the outer wall of valve deck；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 cone seal 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 end surface, 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 component 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 overlay cladding thickness
2.5mm~3mm.
The utility model has the advantage that by adopting the above technical scheme
1, this deep-sea gate valve design uses run-in index single disc, and flashboard and valve base chamber are provided with detachable guide plate, can
Valve body guidance tape processing cumbersome process is effectively reduced, it can be achieved that online replacement and maintenance, prevent flashboard in longitudinal movement
Offset deviation is generated, guarantees product hermeticity energy.Compared with processing " guidance tape " with conventional panel gate valve body, this detachable guiding
Hardened 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 maintenance, 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 the utility model flashboard, valve seat is all made of the surface WC spraying technology cure process, ensure that
The bond strength and hardness of coating and matrix, can effectively improve product service life and sealing performance.
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 dielectric leakage at valve rod, goes out to leak 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 utility model can ROV be drivingly connected, in order to reduce starting torque, reduce the requirement in the source inputted to torque,
Reduce the requirement to upper operating system pressure-bearing, it is ensured that test and service life are equipped with and are connected to pressure balance dress with rack bore
It sets, which has the function of to drive compensation balance when gate valve opens and closes under water, and pressure equaliser can not only be such that Direct Travel opens
Valve closing door upper operating system external and internal pressure is balanced the purpose for playing protection equipment, can also be made by pressure balance principle
Product open and close torque reduces.Pre-tightening function by compensating cylinder inner elastomeric element makes valve under non-open/close states in operating system
Portion's pressurising prevents external seawater corrosion-damaged into causing.
6, all key parts and structure are optimized by finite element analysis, with media contact position built-up welding UNS
N06625
Overlay cladding thickness 2.5mm~3mm；Improve anti-corrosion ability.
In conclusion the utility model has good seal performance, there is flashboard guide function, opening and closing compensation function；Simultaneously
It is strong that corrosion resistant intensity, corrosion resistance improved to flashboard and valve seat cure process, the advantages that long service life.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is A-A cross-sectional view in Fig. 1；
Fig. 3 is B-B cross-sectional view in Fig. 2；
Fig. 4 is the portion I enlarged drawing in Fig. 3；
Fig. 5 is the portion II enlarged drawing in Fig. 3；
Fig. 6 is the portion 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 cross-sectional view in Fig. 9；
Figure 11 is IV partial enlarged view 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, bracket；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 mechanism；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 embodiment
For the invention, features and effects that can further appreciate that the utility model, the following examples are hereby given, and cooperates
Detailed description are as follows for attached drawing:
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 bracket 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 bracket, pad are installed in the bracket
Spring bearing 12 is equipped between ring, the valve rod stretches out valve deck and is threadedly coupled across gasket ring with valve stem nut；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 interface 15 by spring bearing；The ROV structure is 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 Yu 5 surface of valve seat.It is initial close generating
In terms of envelope is than pressure, it is zero that single disc, which generates initial sealing than the valve rod power needed for pressing, therefore such gate valve is opened lightly, flexibly；
In addition, flashboard 7 can float according to the variation of pressure, a possibility that 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 Figure 11, and when gate valve is in close state, 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 guarantee 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 utility model 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 bracket.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 between plug and cylinder cap, the valve deck 19-2 is 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 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 bracket.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 opening and closing can also be made to turn round by pressure balance principle
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
Hole 18-11, the center of 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；Flanging 18-2 is equipped with to same direction in two sides of guide plate ontology；Two
A guide plate in mirror symmetry encloses a guiding and the consistent guide space of valve plate moving direction；Described in guide space
Flashboard and guide plate medial surface body contacts, which are formed, to be sealed, and is moved down on the drive lower flashboard of valve rod is along guide space
Dynamic, realization opens or closes state.Valve body guidance tape processing cumbersome process be can effectively reduce, it can be achieved that online replacement and maintenance,
It prevents flashboard from generating offset deviation in longitudinal movement, guarantees 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 cooperated 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 condition of fluctuation especially suitable for pressure and temperature.Described sealing is using hydrogenation fourth
0 type sealing ring of nitrile rubber, the upper surface of the valve body are 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 between primary seal 3-1 and secondary sealing 3-2 by the outer wall of valve deck；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, is mounted on lip-type packing 6-2, two lips 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 compared with traditional rubber class seal with O ring, this structure valve seat can be fitted
For under more harsh environment.It imports and exports both ends and uses identical valve seat construction, thus on the basis of guaranteeing 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 sealing 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 is 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 cone seal face contacts 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 guarantee still to be capable of forming effective sealing in the failure of the first resealing；This is filled out
Material group is special multiple design, be 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 end surface, 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 condition, 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 where 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-sealing " 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 guarantee 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 and media contact position Jun Dui are welded with UNS N06625 overlay cladding thickness 2.5mm~3mm.
In conclusion particular/special requirement and technical essential of the utility model according to seabed gate valve, determine from simple to complexity,
From primary study to application study, the overall study thinking of technological problems after first customer service technical problem, to complete this underwater lock
The innovative design of valve.The utility model has good seal performance, has flashboard guide function, opening and closing compensation function；Simultaneously to lock
The advantages that it is strong that plate and valve seat cure process improve corrosion resistant intensity, corrosion resistance, long service life.
The above is only the preferred embodiment to the utility model, is not made in any form to the utility model
Limitation, it is all according to the technical essence of the utility model any simple modification made to the above embodiment, equivalent variations with
Modification, is all within the scope of the technical scheme of the utility model.
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 bracket, 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 bracket, gasket ring, the valve rod stretches out
Valve deck passes through gasket ring and is threadedly coupled with valve stem nut；The upper end of the valve stem nut passes through pin connection actuating sleeve, the actuating sleeve
Upper end by pin connection upper valve rod, the upper valve rod connection valve position indicating mechanism；The upper valve rod passes through spring bearing
Connect ROV interface；The ROV structure is mounted on valve body fixed frame；It is characterized by: installation is provided with initially on the valve seat
Than the precompressed disc spring of pressure；The pressure release passage extended in the valve body equipped with upstream direction, 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: 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 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 of top guide plate is less than the guiding stroke of valve seat lower guide plates；In two sides of guide plate ontology to same direction
Equipped with flanging；Two guide plates in mirror symmetry enclose a guiding and the consistent guide space of valve plate moving direction；?
The flashboard and guide plate medial surface body contacts, which are formed, in guide space seals, and in the drive lower flashboard of valve rod along guiding
It is moved up and down in space, realization opens or closes 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 cooperated 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
0 type sealing ring of nitrile rubber, the upper surface of the valve body are 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 shape 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 cone seal face contacts form the first resealing structure, first
The top of the resealing structure valve rod is equipped with packing seal slot, is equipped with packing seal group 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 end surface, the sealing gland is fixedly mounted on valve deck by fastener；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 and media contact position Jun Dui of valve deck are welded with UNS N06625 overlay cladding thickness 2.5mm~3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820768262.6U CN208237108U (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 |
|---|---|---|---|
| CN201820768262.6U CN208237108U (en) | 2018-05-21 | 2018-05-21 | The underwater flat gate valve of subsea tree |
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| Publication Number | Publication Date |
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| CN208237108U true CN208237108U (en) | 2018-12-14 |
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ID=64580379
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820768262.6U Active CN208237108U (en) | 2018-05-21 | 2018-05-21 | The underwater flat gate valve of subsea tree |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443524A (en) * | 2018-05-21 | 2018-08-24 | 天津祥嘉流体控制***有限公司 | The underwater flat gate valve of subsea tree |
| CN111570692A (en) * | 2020-05-19 | 2020-08-25 | 强大阀门集团有限公司 | Forming process of large-diameter integrally forged gate valve |
-
2018
- 2018-05-21 CN CN201820768262.6U patent/CN208237108U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443524A (en) * | 2018-05-21 | 2018-08-24 | 天津祥嘉流体控制***有限公司 | The underwater flat gate valve of subsea tree |
| CN111570692A (en) * | 2020-05-19 | 2020-08-25 | 强大阀门集团有限公司 | Forming process of large-diameter integrally forged gate valve |
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