CN113048251A - Deepwater duplex gate valve - Google Patents
Deepwater duplex gate valve Download PDFInfo
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- CN113048251A CN113048251A CN202110220446.5A CN202110220446A CN113048251A CN 113048251 A CN113048251 A CN 113048251A CN 202110220446 A CN202110220446 A CN 202110220446A CN 113048251 A CN113048251 A CN 113048251A
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- 230000007246 mechanism Effects 0.000 claims abstract description 86
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims description 21
- 239000012530 fluid Substances 0.000 claims description 14
- 230000000670 limiting effect Effects 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 2
- 239000013535 sea water Substances 0.000 abstract description 9
- 230000008859 change Effects 0.000 description 10
- 239000003208 petroleum Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F16K3/0281—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
- 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
- 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
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
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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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention relates to a deepwater duplex gate valve, which comprises a duplex valve body, a valve body and a gate valve, wherein the duplex valve body is of two valve body structures which are vertically fixed in parallel and provided with communicated circulation channels along the horizontal direction; a valve cavity communicated with the flow passage is arranged in each valve body structure; the valve plate is arranged in each valve cavity; each valve plate corresponds to one driving mechanism, the top of each driving mechanism is driven by an ROV, and the valve plates are driven by valve rods to be communicated or cut off the circulation channels; the interior of the pressure compensation mechanism is divided into two cavities by an elastic piece, and the interior cavity of each driving mechanism is correspondingly communicated with one cavity of one pressure compensation mechanism; the other cavity of each pressure compensation mechanism is communicated with the outside and keeps the pressure balance in the two cavities; therefore, the influence of seawater pressure on the gate valve can be offset, the gate valve can be applied to deep sea operation, and the requirement of deep water operation is met. Due to the adoption of the duplex structure, the device is used for one purpose and one standby, and provides safety guarantee for use.
Description
Technical Field
The invention relates to the technical field of deepwater oil exploitation, in particular to a duplex gate valve for deepwater.
Background
With the increasingly decreasing onshore petroleum resources, the offshore petroleum exploitation is rapidly increased, the deepwater petroleum exploitation is influenced by the depth of the seawater, the difficulty of the petroleum exploitation is high, and the performance requirement of deepwater petroleum exploitation equipment is higher and higher; the underwater gate valve is a key part in an underwater Christmas tree, an underwater emergency well sealing device and an underwater manifold system, the development of the domestic underwater gate valve is in a primary stage, the maximum water depth applicable to the domestic existing underwater gate valve is not more than 1500 m, the pressure is not more than 6000psi, and the domestic requirement on deep water oil development cannot be met. Therefore, how to provide a duplex gate valve for deep water is a problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
Therefore, the invention aims to provide a duplex gate valve for deepwater, which meets the requirement of current deepwater oil development.
The invention provides a duplex gate valve for deep water, which comprises:
the double-linkage valve body is of two valve body structures which are vertically fixed in parallel, and a communicated circulation channel is arranged along the horizontal direction; a valve cavity communicated with the flow passage is arranged in each valve body structure;
the valve plate is arranged in each valve cavity;
each valve plate corresponds to one driving mechanism, the top of each driving mechanism is driven by an ROV, and the valve plates are driven by valve rods to be communicated or cut off the circulation channels;
the interior of the pressure compensation mechanism is divided into two cavities by an elastic piece, and the inner cavity of each driving mechanism is correspondingly communicated with one cavity of one pressure compensation mechanism; the other chamber of each pressure compensation mechanism is communicated with the outside and keeps the pressure in the two chambers balanced.
According to the technical scheme, compared with the prior art, the duplex gate valve for the deep water, disclosed by the invention, has the advantages that the duplex structure is adopted, so that the gate valve is used for one purpose and one standby, and the safety guarantee is provided for the use; and the inner cavity of the driving mechanism is correspondingly communicated with a pressure compensation mechanism; the pressure of two side cavities is kept balanced by the movement of the elastic part of the pressure compensation mechanism; therefore, the influence of seawater pressure on the gate valve can be offset, the gate valve can be applied to deep sea operation, and the requirement of deep water operation is met.
Further, each pressure compensation mechanism includes: the pressure compensation mechanism comprises a shell, a connecting pipe and a bag; one side of the pressure compensation mechanism shell is fixedly provided with a connecting pipe communicated with the inner cavity of the pressure compensation mechanism shell, and the other side of the pressure compensation mechanism shell is provided with a plurality of through holes communicated with the outside; the connecting pipe is hermetically connected with the inner cavity of the driving mechanism and is communicated with the inner cavity of the driving mechanism; the inner cavity of the shell of the pressure compensation mechanism is divided into two parts by the bag, and the pressure at the two sides of the inner cavity is kept balanced, wherein the inner cavity of the driving mechanism, the shell of the pressure compensation mechanism and the bag are filled with fluid with the same density; the bag is made of rubber, preferably nitrile rubber, is filled with fluid, and moves to change the volumes of two chambers in the inner cavity of the pressure compensation mechanism shell so as to adjust the pressures on two sides to be balanced. Therefore, the invention can be suitable for the seawater depth of more than 3000 meters and the rated working pressure of more than 15000 psi.
Furthermore, the fluid is an anti-corrosion liquid, and internal parts of the gate valve are prevented from rusting.
Furthermore, the pressure compensation mechanism shell comprises a first shell and a second shell, a connecting pipe is welded on one side of the first shell, an open opening is formed on the other side of the first shell, a connecting flange is arranged at the edge of the open opening, an opening is formed on one side of the second shell, a flange corresponding to the connecting flange is formed at the edge of the opening, and the first shell and the second shell are fixed through bolts to form a cavity; the edge of the bag forms a sheet shape and is fixed between the connecting flange and the flange in a sealing way; the first housing and bladder form a fluid-filled chamber in communication with the interior chamber of the drive mechanism; a pressure regulating cavity communicated with the outside is formed between the bag and the second shell. Thereby securing the bladder between the first and second shells while the bladder seals at the flange between the first and second shells.
Further, the driving mechanism sequentially comprises a fixed shield, a sheath and a spring shell from the top to the bottom; the shield is open at the top and defines an ROV drive bore; the operating rod is connected in the sheath, and the top end of the operating rod penetrates out of the sheath and corresponds to the driving hole; the inner cavity of the sheath is filled with fluid and is fixedly communicated with the pressure compensation mechanism; the lower end of the operating rod is inserted into and rotates in the inner cavity of the spring shell and is in threaded connection with the support; a spring seat is sleeved on the support, and the support and the spring seat form limiting through a limiting piece; the outer wall of the spring seat is sleeved with a spring; a piston shaft is fixed at the bottom of the spring seat; the piston shaft is fixed with the valve rod.
Further, the spring comprises a large spring and a small spring which are arranged in a nesting mode and are oppositely screwed; the spring relates to the parameter and selects according to the gate valve opening force, adopts big spring housing to establish little spring and undertakes the compression jointly, can increase the gate valve opening force, reduces the spring setting simultaneously, and both revolve to the opposite motion interference that prevents.
Further, the duplex gate valve for deep water further comprises a hydraulic cylinder, the bottom of the spring shell is hermetically connected with the hydraulic cylinder, the bottom of the piston shaft is fixed with the hydraulic piston, the top of the valve rod is fixed with the hydraulic piston, and an oil duct of the hydraulic cylinder is connected with underwater hydraulic control or ground far-end hydraulic control; therefore, the second set of driving mode is adopted and is independent of the ROV driving power, and the operation safety is ensured.
Further, the invention provides a pair gate valve for deep water, still includes display mechanism, and display mechanism includes: the rack, the gear assembly and the display block; the bottom of the rack is fixed on the spring seat and can axially move along the inner cavity of the sheath along with the spring seat; the gear assembly comprises a gear shaft fixing frame, a gear and a gear shaft; the gear shaft fixing frame is fixed at the bottom in the sheath and used for supporting the gear shaft, the middle part of the gear shaft is provided with a gear meshed with the rack, one end of the gear shaft extends out of the sheath and is fixed with a display block, and a valve switch mark is arranged on the display block. Therefore, the display block outside the sheath can clearly display the on-off state of the gate valve, the ROV feeds the state back to the control end, and the running reliability of the gate valve is improved.
Furthermore, each valve body structure comprises a valve body, an upper end cover, a lower end cover and a sealing seat; a circulation passage is arranged on the valve body along the horizontal direction, the valve cavity is positioned in the middle of the valve body, the top and the bottom of the valve body are open and are respectively fixed in a sealing way through an upper end cover and a lower end cover, and two sealing seats are respectively arranged in the valve cavities corresponding to the two sides of the valve plate; the upper end cover is provided with a through hole of the valve rod. The through hole of upper end cover sets up the inner groovy, is equipped with the two-way sealing filler in the recess, prevents that the sea water from getting into, prevents inside outside seepage simultaneously.
Furthermore, the lower end cover is provided with a through hole of a balance rod, and one end of the balance rod is fixed at the bottom of the valve plate and is the same as the outer diameter of the valve rod. Wherein the lower end cover is provided with a groove in the through hole, and the groove is internally provided with a bidirectional sealing filler to prevent seawater from entering and prevent internal leakage to the outside. The outer diameters of the balance rod and the valve rod are the same, so that the valve cavity can be ensured to have no volume change in the on-off state, and the on-off torque is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a double gate valve for deep water according to the present invention;
FIG. 2 is a partial sectional view of a double gate valve for deep water according to the present invention;
FIG. 3 is a schematic diagram of the pressure compensating mechanism;
FIG. 4 is a view taken along the line A of FIG. 2 (showing a schematic structural view of a display mechanism);
FIG. 5 is a view showing a connection relationship between the seat and the spring seat;
in the figure: 100-double valve body, 101-flow passage, 102-valve chamber, 103-valve body, 104-upper end cover, 105-lower end cover, 106-sealing seat, 107-bidirectional sealing filler, 200-valve plate, 300-driving mechanism, 301-shield, 302-sheath, 3021-operating rod, 303-spring housing, 3031-support, 3032-spring seat, 3033-spring, 3034-piston shaft, 3035-limiting piece, 400-pressure compensation mechanism, 401-pressure compensation mechanism housing, 4011-first housing, 4012-second housing, 402-connecting pipe, 403-sac, 404-through hole, 405-connecting flange, 500-hydraulic cylinder, 501-hydraulic piston, 600-display mechanism, 601-rack, 602-gear assembly, 6021-gear shaft holder, 6022-gear, 6023-gear shaft, 603-display block, 700-balance bar, 800-valve stem.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Referring to the accompanying drawings 1 and 2, the embodiment of the invention discloses a double gate valve for deep water, which comprises:
the double-valve body 100 is characterized in that the double-valve body 100 is of two valve body structures which are vertically fixed in parallel, and a communicated circulation channel 101 is arranged along the horizontal direction; each valve body structure is internally provided with a valve cavity 102 communicated with the flow passage 101;
a valve plate 200, one valve plate 200 is arranged in each valve cavity 102;
each valve plate 200 corresponds to one driving mechanism 300, the top of each driving mechanism 300 is driven by an ROV, and the valve rod 800 drives the valve plate 200 to be communicated or cut off the flow channel 101;
the interior of the pressure compensation mechanism 400 is divided into two cavities by an elastic member, and the cavity in each driving mechanism 300 is correspondingly communicated with one cavity of the pressure compensation mechanism 400; the other chamber of each pressure compensation mechanism 400 is connected to the outside and keeps the pressure in the two chambers balanced.
The invention discloses and provides a duplex gate valve for deep water, which adopts a duplex structure, is one-use and one-standby and provides safety guarantee for use; and the inner cavity of the driving mechanism is correspondingly communicated with a pressure compensation mechanism; the pressure of two side cavities is kept balanced by the movement of the elastic part of the pressure compensation mechanism; therefore, the influence of seawater pressure on the gate valve can be offset, the gate valve can be applied to deep sea operation, and the requirement of deep water operation is met.
Advantageously, with reference to fig. 3, each pressure compensation mechanism 400 comprises: a pressure compensation mechanism housing 401, a connecting tube 402, and a bladder 403; a connecting pipe 402 communicated with the inner cavity of the pressure compensation mechanism shell 401 is fixed on one side of the pressure compensation mechanism shell 401, and a plurality of through holes 404 communicated with the outside are formed in the other side of the pressure compensation mechanism shell; the connecting pipe 402 is hermetically connected to the inner chamber of the driving mechanism 300 and is communicated with the inner chamber of the driving mechanism 300; bladder 403 divides the interior of pressure compensation mechanism housing 401 into two portions and maintains pressure balance across them, wherein the interior chamber of drive mechanism 300, pressure compensation mechanism housing 401, and bladder 403 are filled with fluid of the same density. The bag is made of rubber, preferably nitrile rubber, is filled with fluid, and moves to change the volumes of two chambers in the inner cavity of the pressure compensation mechanism shell so as to adjust the pressures on two sides to be balanced. Therefore, the invention can be suitable for the seawater depth of more than 3000 meters and the rated working pressure of more than 15000 psi.
Advantageously, the fluid is a corrosion inhibitor to prevent rusting of the internal parts of the gate valve.
More advantageously, the pressure compensation mechanism casing 401 includes a first casing 4011 and a second casing 4012, the first casing 4011 has a connecting pipe 402 welded to one side thereof, and the other side thereof is open and has an opening edge with a connecting flange 405, the second casing 4012 has an opening formed on one side thereof and an opening edge with a flange corresponding to the connecting flange 405, and the first casing 4011 and the second casing 4012 are fixed by bolts to form a chamber; the edge of the pocket 403 is formed as a flap and is sealingly secured between the attachment flange 405 and the flange; the first housing 4011 and bladder 403 form a fluid-filled chamber in communication with the interior chamber of the drive mechanism 300; a pressure regulating chamber communicated with the outside is formed between the bladder 403 and the second housing 4012. Thereby securing the bladder between the first and second shells while the bladder seals at the flange between the first and second shells.
One of the design factors affecting pressure compensation is the volume change of the spring cavity when the valve is opened or closed, and the other is the change of the compressed volume of the compensation liquid under high pressure.
Referring to fig. 2, the driving mechanism 300 includes a fixed shield 301, a sheath 302 and a spring housing 303 in sequence from top to bottom; the shroud 301 is open-topped and defines an ROV drive bore; an operating rod 3021 is connected in the sheath 302, and the top end of the operating rod 3021 penetrates through the sheath 302 and corresponds to the driving hole; the inner cavity of the sheath 302 is filled with fluid and is fixedly communicated with the pressure compensation mechanism 400; the lower end of the operating rod 3021 is inserted into the inner cavity of the spring housing 303 and rotates, and is in threaded connection with the support 3031; a spring seat 3032 is sleeved on the support 3031, and the support 3031 and the spring seat 3032 are limited by a limiting part 3035; a spring 3033 is sleeved on the outer wall of the spring seat 3032; a piston shaft 3034 is fixed at the bottom of the spring seat 3032; the piston shaft 3034 is fixed to the valve stem 800. Referring to fig. 5, the limiting member 3035 may be a flat key, a key groove is formed on the outer side of the support for mounting the flat key, and a limiting groove is formed on the inner side of the spring seat, so that the flat key can slide in the limiting groove along the axial direction (vertical direction in the drawing), that is, the spring seat can move along the support along the axial direction.
Advantageously, spring 3033 comprises a large spring and a small spring in a nested arrangement and with opposite handedness. The spring relates to the parameter and selects according to the gate valve opening force, adopts big spring housing to establish little spring and undertakes the compression jointly, can increase the gate valve opening force, reduces the spring setting simultaneously, and both revolve to the opposite motion interference that prevents.
In the embodiment of the invention, the hydraulic cylinder 500 is further included, the hydraulic cylinder 500 is hermetically connected to the bottom of the spring housing 303, the bottom of the piston shaft 3034 is fixed to the hydraulic piston 501, the top of the valve rod 800 is fixed to the hydraulic piston 501, and an oil passage of the hydraulic cylinder 500 is hydraulically connected to an underwater oil control or a ground far end. Therefore, the second set of driving mode is adopted and is independent of the ROV driving power, and the operation safety is ensured.
In another embodiment of the present invention, referring to fig. 4, a display mechanism 600 is further included, the display mechanism 600 including: a rack 601, a gear assembly 602, a display block 603; the bottom of the rack 601 is fixed on the spring seat 3032 and can axially move along the inner cavity of the sheath 302 along with the spring seat 3032; the gear assembly 602 comprises a gear shaft fixing frame 6021, a gear 6022 and a gear shaft 6023; the gear shaft fixing frame 6021 is fixed at the inner bottom of the sheath 302 and is used for supporting the gear shaft 6023, the gear 6022 meshed with the rack 601 is arranged in the middle of the gear shaft 6023, one end of the gear shaft 6022 extends out of the sheath 302 and is fixed with the display block 603, and the display block 603 is provided with a valve switch mark. The display block can be a rectangular block, one side of the display block is provided with an O, the other side of the display block is provided with an S, the display block rotates 180 degrees along with the gear shaft, the display block is respectively displayed as the O or the S, and the ROV can observe and confirm the opening and closing state of the valve.
In other embodiments of the present invention, each valve body structure comprises a valve body 103, an upper end cap 104, a lower end cap 105 and a sealing seat 106; a flow passage 101 is arranged on the valve body 103 along the horizontal direction, the valve cavity 102 is positioned in the middle of the valve body 103, the top and the bottom of the valve body 103 are both open and are sealed and fixed by an upper end cover 104 and a lower end cover 105 respectively, and two sealing seats 106 are arranged in the valve cavity 102 corresponding to the two sides of the valve plate 200 respectively; the upper end cover 104 is provided with a through hole of the valve rod 800, the lower end cover 105 is provided with a through hole of the balance bar 700, one end of the balance bar 700 is fixed at the bottom of the valve plate 200, and the outer diameter of the balance bar 700 is the same as that of the valve rod 800. The grooves in the upper end cover and the lower end cover are both provided with bidirectional sealing packing 107 to ensure internal and external sealing, and meanwhile, the outer diameters of the two rods of the balance rod and the valve rod are the same, so that the valve cavity can be ensured to have no volume change in the on-off state, and the on-off torque is reduced.
The invention provides a high-pressure-resistant, high-sealing-performance and high-reliability duplex gate valve for deep water aiming at the requirements of offshore oil exploitation, which is suitable for seawater depths of more than 3000 meters and rated working pressures of more than 15000psi, adopts a double-sealing structure, a double-driving technology, a pressure compensation technology and a switch display technology, is widely applied to an underwater emergency well sealing device, an underwater well killing throttle manifold system and an underwater production system, and can meet the requirements of offshore oil drilling and exploitation at home and abroad.
When the valve plate is used, the ROV driving end can be inserted into a driving hole in the top of the protective cover to drive the operating rod to rotate, and the support is in threaded connection with the operating rod, so that the support moves (moves downwards) along the axial direction in the spring shell and pushes the spring seat to move downwards to compress the spring, the piston rod is pushed to drive the valve rod and the valve plate to move downwards, the through hole in the valve plate is further far away from the cut-off channel, the flow channel is blocked, and the sealing seats on the two sides of the valve plate are sealed; the pressure compensation mechanism is always in a compensation state, the display device is used for driving the rack to move downwards under the downward movement of the spring seat, then the driving gear rotates, the gear shaft drives the display block to rotate, and the closed state displays S; when the circulation channel needs to be opened, the ROV rotates 180 degrees, so that each part returns, the valve plate is opened, and the display block displays O; the ROV observes the change under water and feeds the change back to the control end.
The hydraulic cylinder drive is also arranged, when external liquid is filled into the hydraulic cylinder, the hydraulic piston is compressed to move downwards, so that the piston shaft and the spring seat are driven to move downwards (at the moment, the spring seat and the support generate relative motion along the axial direction), and the spring is compressed; the valve rod moves downwards under the driving of the hydraulic piston, so that the through hole in the valve plate is far away from the cut-off channel, and the gate valve is closed; the spring seat moves downwards to drive the rack to move downwards, so that the drive gear rotates, the gear shaft drives the display block to rotate, and the closed state shows S; when the circulation channel needs to be opened, under the action of the elastic force recovered by the spring, the parts above the spring seat and the parts below the piston rod are pushed to return, so that the through hole in the valve plate is communicated with the circulation channel, and the display block displays O; the ROV observes the change under water and feeds the change back to the control end.
The display device can work normally no matter which way the display device is driven; the invention adopts two driving modes to be independently arranged, and the two gate valves are arranged in parallel, thereby ensuring the use safety of the gate valves. The driving cavity is connected with the pressure compensation device, so that the gate valve can be operated in a deepwater environment and is not influenced by deepwater external pressure. The device has the advantages of reasonable structure, high sealing reliability, simple operation, convenient use, intuitive switch display and capability of operating in a deep water environment.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A deepwater duplex gate valve is characterized by comprising:
the double-valve-body (100) is of two valve-body structures which are vertically fixed in parallel, and a communicated flow channel (101) is arranged along the horizontal direction; each valve body structure is internally provided with a valve cavity (102) communicated with the flow passage (101);
a valve plate (200), one valve plate (200) being disposed in each valve cavity (102);
each valve plate (200) corresponds to one driving mechanism (300), the top of each driving mechanism (300) is driven by an ROV, and a valve rod (800) drives the valve plate (200) to communicate or cut off the flow channel (101);
the interior of the pressure compensation mechanism (400) is divided into two cavities by an elastic piece, and the cavity in the interior of each driving mechanism (300) is correspondingly communicated with one cavity of one pressure compensation mechanism (400); and the other chamber of each pressure compensation mechanism (400) is communicated with the outside and keeps the pressure in the two chambers balanced.
2. A twin gate valve for deep water according to claim 1, characterised in that each of the pressure compensating means (400) comprises: a pressure compensation mechanism shell (401), a connecting pipe (402) and a bag (403); one side of the pressure compensation mechanism shell (401) is fixedly provided with the connecting pipe (402) communicated with the inner cavity of the pressure compensation mechanism shell, and the other side of the pressure compensation mechanism shell is provided with a plurality of through holes (404) communicated with the outside; the connecting pipe (402) is hermetically connected with the inner chamber of the driving mechanism (300) and is communicated with the inner chamber of the driving mechanism (300); the bladder (403) divides the inner cavity of the pressure compensation mechanism shell (401) into two parts and keeps the pressure balance on the two sides, wherein the inner cavity of the driving mechanism (300), the pressure compensation mechanism shell (401) and the bladder (403) are filled with fluid with the same density.
3. The double gate valve for deep water according to claim 2, wherein the fluid is a corrosion preventing liquid.
4. The double gate valve for deep water as claimed in claim 2, wherein the pressure compensation mechanism casing (401) comprises a first casing (4011) and a second casing (4012), the first casing (4011) is welded with the connecting pipe (402) at one side, the other side is open and open, the open edge is provided with a connecting flange (405), the second casing (4012) is provided with an opening at one side, the opening edge is provided with a flange corresponding to the connecting flange (405), and the first casing (4011) and the second casing (4012) form a chamber through being fixed by bolts; the edge of the pocket (403) is formed into a sheet shape and is fixed between the connecting flange (405) and the flange in a sealing way; the first housing (4011) and the bladder (403) forming a fluid-filled chamber in communication with an interior chamber of the drive mechanism (300); a pressure regulating cavity communicated with the outside is formed between the bag (403) and the second shell (4012).
5. A double gate valve for deep water according to claim 1, characterized in that the driving mechanism (300) comprises a fixed shield (301), a sheath (302) and a spring housing (303) in sequence from top to bottom; the shield (301) is open-topped and defines an ROV drive bore; an operating rod (3021) is connected in the sheath (302), and the top end of the operating rod (3021) penetrates out of the sheath (302) and corresponds to the driving hole; the inner cavity of the sheath (302) is filled with fluid and is fixedly communicated with the pressure compensation mechanism (400); the lower end of the operating rod (3021) is inserted into the inner cavity of the spring shell (303) in a rotating manner and is in threaded connection with the support (3031); a spring seat (3032) is sleeved on the support (3031), and the support (3031) and the spring seat (3032) are limited by a limiting part (3035); the outer wall of the spring seat (3032) is sleeved with a spring (3033); a piston shaft (3034) is fixed at the bottom of the spring seat (3032); the piston shaft (3034) is fixed with the valve rod (800).
6. A sluice valve according to claim 5, characterised in that the spring (3033) comprises a large spring and a small spring arranged in a nested arrangement and having opposite directions of rotation.
7. The double gate valve for deep water as claimed in claim 5, further comprising a hydraulic cylinder (500), wherein the hydraulic cylinder (500) is hermetically connected to the bottom of the spring housing (303), the bottom of the piston shaft (3034) is fixed to a hydraulic piston (501), the top of the valve rod (800) is fixed to the hydraulic piston (501), and the oil passage of the hydraulic cylinder (500) is connected with underwater hydraulic control or ground remote hydraulic control.
8. A twin gate valve for deep water according to claim 5, further comprising a display mechanism (600), the display mechanism (600) comprising: the gear rack (601), the gear assembly (602) and the display block (603); the bottom of the rack (601) is fixed on the spring seat (3032) and can move along the axial direction of the inner cavity of the sheath (302) along with the spring seat (3032); the gear assembly (602) comprises a gear shaft fixing frame (6021), a gear (6022) and a gear shaft (6023); the gear shaft fixing frame (6021) is fixed at the inner bottom of the sheath (302) and used for supporting the gear shaft (6023), a gear (6022) meshed with the rack (601) is arranged in the middle of the gear shaft (6023), one end of the gear shaft extends out of the sheath (302) and is fixed with the display block (603), and a valve switch mark is arranged on the display block (603).
9. A deepwater duplex gate valve as claimed in claim 1, wherein each valve body structure comprises a valve body (103), an upper end cover (104), a lower end cover (105) and a sealing seat (106); the circulation channel (101) is arranged on the valve body (103) along the horizontal direction, the valve cavity (102) is positioned in the middle of the valve body (103), the top and the bottom of the valve body (103) are both open and are respectively fixed in a sealing manner through the upper end cover (104) and the lower end cover (105), and two sealing seats are respectively arranged in the valve cavity (102) corresponding to the two sides of the valve plate (200); the upper end cover (104) is provided with a through hole of the valve rod (800).
10. The gate valve of claim 9, wherein the lower end cover (105) is provided with a through hole for a balance bar (700), and one end of the balance bar (700) is fixed to the bottom of the valve plate (200) and has the same outer diameter as the valve rod (800).
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| CN202110220446.5A CN113048251B (en) | 2021-02-26 | 2021-02-26 | Duplex gate valve for deep water |
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| CN202110220446.5A CN113048251B (en) | 2021-02-26 | 2021-02-26 | Duplex gate valve for deep water |
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| CN113048251B CN113048251B (en) | 2023-12-05 |
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Cited By (1)
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| CN114251477A (en) * | 2021-12-23 | 2022-03-29 | 深圳海油工程水下技术有限公司 | Deep water integrated ROV single-operation multi-isolation valve |
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| CN113048251B (en) | 2023-12-05 |
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