CN113048251B - Duplex gate valve for deep water - Google Patents
Duplex gate valve for deep water Download PDFInfo
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- CN113048251B CN113048251B CN202110220446.5A CN202110220446A CN113048251B CN 113048251 B CN113048251 B CN 113048251B CN 202110220446 A CN202110220446 A CN 202110220446A CN 113048251 B CN113048251 B CN 113048251B
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- pressure compensation
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 90
- 238000007789 sealing Methods 0.000 claims description 23
- 239000012530 fluid Substances 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 239000003755 preservative agent Substances 0.000 claims description 3
- 230000002335 preservative effect Effects 0.000 claims description 3
- 239000013535 sea water Substances 0.000 abstract description 7
- 239000003208 petroleum Substances 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 230000002457 bidirectional effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 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
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003993 interaction Effects 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
- 230000000007 visual effect Effects 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention relates to a double gate valve for deep water, which comprises a double valve body, wherein the double 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; the inside of each valve body structure is provided with a valve cavity communicated with the circulation channel; the valve plates are arranged in each valve cavity; each valve plate corresponds to one driving mechanism, the top of the driving mechanism is driven by an ROV, and the valve plates are driven by a valve rod to be communicated with or cut off a circulation channel; the pressure compensation mechanism is internally divided into two cavities through an elastic piece, and each driving mechanism internal cavity 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 the pressure balance between the two cavities is kept; therefore, the influence of the seawater pressure on the gate valve can be counteracted, the gate valve can be applied to deep sea operation, and the requirement of deep water operation is met. Because of adopting the duplex structure, the device is one-to-one and provides safety guarantee for use.
Description
Technical Field
The invention relates to the technical field of deep water petroleum exploitation, in particular to a double gate valve for deep water.
Background
With the increasing decrease of land petroleum resources, offshore petroleum exploitation is rapidly increased, and deep water petroleum exploitation is influenced by the depth of sea water, so that the petroleum exploitation difficulty is high, and the performance requirement on petroleum drilling equipment for deep water exploitation is higher and higher; the underwater sluice valve is a key component in the underwater Christmas tree, the underwater emergency well sealing device and the underwater manifold system, the development of the underwater sluice valve in China is in a primary stage, the maximum water depth applicable to the conventional underwater sluice valve in China is not more than 1500 meters, the pressure is not more than 6000psi, and the requirements of the deep water petroleum development in China cannot be met. Therefore, how to provide a double gate valve for deep water is a problem to be solved by those skilled in the art.
Disclosure of Invention
Therefore, the invention aims to provide a double gate valve for deep water, which meets the current requirements of deep water petroleum development.
The invention provides a double gate valve for deep water, which comprises:
the double valve body is of two valve body structures which are vertically fixed in parallel, and a communicated flow channel is arranged along the horizontal direction; the inside of each valve body structure is provided with a valve cavity communicated with the circulation channel;
the valve plates are arranged in each valve cavity;
each valve plate corresponds to one driving mechanism, the top of the driving mechanism is driven by an ROV, and the valve plates are driven by a valve rod to be communicated with or cut off a circulation channel;
the pressure compensation mechanism is divided into two cavities by an elastic piece, and the cavity in 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 the pressure balance between the two chambers is kept.
Compared with the prior art, the invention discloses a double gate valve for deep water, which adopts a double structure, so that the double gate valve is one-to-one and provides safety guarantee for use; the internal cavity of the driving mechanism is correspondingly communicated with a pressure compensation mechanism; the pressure balance of the two side cavities is kept through the movement of the elastic part of the pressure compensation mechanism; therefore, the influence of the seawater pressure on the gate valve can be counteracted, the gate valve can be applied to deep sea operation, and the requirement of deep water operation is met.
Further, each of the pressure compensating mechanisms includes: a pressure compensating mechanism housing, a connecting tube, and a bladder; one side of the pressure compensation mechanism shell is fixed 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 connected with the inner cavity of the driving mechanism in a sealing way and is communicated with the inner cavity of the driving mechanism; the inner cavity of the pressure compensation mechanism shell is divided into two parts by the bag, and the pressure balance of the two sides of the inner cavity is kept, wherein the inner cavity of the driving mechanism, the pressure compensation mechanism shell and the bag are filled with the same density fluid; the bag is made of rubber, preferably nitrile rubber, the interior of the bag is filled with fluid, the movement of the bag changes the volumes of two chambers in the inner cavity of the shell of the pressure compensation mechanism, and the pressures at the two sides are regulated to be balanced. The invention is thus applicable to sea depths greater than 3000 meters and rated operating pressures greater than 15000psi.
Further, the fluid is preservative solution, so that the internal parts of the gate valve are prevented from rusting.
Further, the pressure compensation mechanism shell comprises a first shell and a second shell, wherein 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 is sheet-shaped and is fixed between the connecting flange and the flange in a sealing way; the first housing and the bladder form a fluid-filled chamber in communication with the interior chamber of the drive mechanism; and a pressure regulating cavity communicated with the outside is formed between the bag and the second shell. Whereby the bladder is secured between the first and second housings while the bladder seals the flange between the first and second housings.
Further, the driving mechanism sequentially comprises a fixed shield, a sheath and a spring shell from top to bottom; the shroud is open at the top and defines an ROV drive bore; an 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 fixedly communicated with the pressure compensation mechanism; the lower end of the operating rod is inserted into the inner cavity of the spring shell, rotated and connected with the support through threads; the support is sleeved with a spring seat, and a limit part is arranged between the support and the spring seat to form limit; 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 springs comprise large springs and small springs which are arranged in a stacked manner and are opposite in rotation direction; the spring related parameters are selected according to the opening force of the gate valve, and the large spring is sleeved with the small spring to bear compression together, so that the opening force of the gate valve can be increased, the setting of the spring is reduced, and the rotation directions of the large spring and the small spring are opposite to each other to prevent movement interference.
Further, the invention provides a double gate valve for deep water, which further comprises a hydraulic cylinder, wherein the bottom of a spring shell is connected with the hydraulic cylinder in a sealing way, the bottom of a piston shaft is fixed with a hydraulic piston, the top of a valve rod is fixed with the hydraulic piston, and an oil duct of the hydraulic cylinder is connected with underwater hydraulic control or is connected with ground remote hydraulic control; therefore, a second set of driving mode is adopted and independent from ROV driving power, so that the operation safety is ensured.
Further, the invention provides a deepwater double gate valve, which also comprises a display mechanism, wherein the display mechanism comprises: rack, gear assembly, 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 component comprises a gear shaft fixing frame, a gear and a gear shaft; the gear shaft fixing frame is fixed at the inner bottom of the sheath and used for supporting the gear shaft, a gear meshed with the rack is arranged in the middle of the gear shaft, one end of the gear shaft extends out of the sheath and is fixedly provided 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, and the ROV feeds back the state to the control end, so that the running reliability of the gate valve is improved.
Further, each valve body structure comprises a valve body, an upper end cover, a lower end cover and a sealing seat; the valve body is provided with a circulating channel 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 both 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 cavity 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 the upper end cover is provided with an inner groove, and a bidirectional sealing filler is arranged in the groove to prevent seawater from entering and simultaneously prevent the inside from leaking to the outside.
Further, a through hole of a balance rod is formed in the lower end cover, one end of the balance rod is fixed to the bottom of the valve plate, and the balance rod is identical to the outer diameter of the valve rod. Wherein the lower end cover is provided with a groove through the hole, and a bidirectional sealing filler is arranged in the groove to prevent seawater from entering and simultaneously prevent the inside from leaking to the outside. The outer diameters of the balance rod and the valve rod are the same, so that the valve cavity is 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 that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a double gate valve for deep water according to the present invention;
FIG. 2 is a partial cross-sectional view of a double gate valve for deep water according to the present invention;
FIG. 3 is a schematic diagram showing the structure of the pressure compensation mechanism;
FIG. 4 is a view from direction A of FIG. 2 (showing a schematic view of the display mechanism);
FIG. 5 is a diagram showing the connection between the seat and the spring seat;
in the figure: 100-duplex valve body, 101-flow passage, 102-valve cavity, 103-valve body, 104-upper end cap, 105-lower end cap, 106-seal seat, 107-bidirectional packing, 200-valve plate, 300-drive mechanism, 301-shroud, 302-shroud, 3021-operating rod, 303-spring housing, 3031-seat, 3032-spring seat, 3033-spring, 3034-piston shaft, 3035-retainer, 400-pressure compensation mechanism, 401-pressure compensation mechanism housing, 4011-first housing, 4012-second housing, 402-connecting tube, 403-pocket, 404-through hole, 405-connecting flange, 500-hydraulic cylinder, 501-hydraulic piston, 600-display mechanism, 601-rack, 602-gear assembly, 6021-gear shaft mount, 6022-gear, 6023-gear shaft, 603-display block, 700-balance rod, 800-valve rod.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should 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 the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Referring to fig. 1 and 2, the embodiment of the invention discloses a duplex gate valve for deep water, which comprises:
the double valve body 100, the double valve body 100 is two valve body structures fixed in parallel vertically, and a communicating flow channel 101 is arranged along the horizontal direction; each valve body structure is internally provided with a valve cavity 102 communicated with the circulation channel 101;
valve plates 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 the driving mechanism 300 is driven by an ROV, and the valve plate 200 is driven by the valve rod 800 to be communicated with or cut off the circulation channel 101;
the pressure compensation mechanism 400 is divided into two cavities by an elastic piece, and the cavity in each driving mechanism 300 is correspondingly communicated with one cavity of one pressure compensation mechanism 400; the other chamber of each pressure compensating mechanism 400 communicates with the outside and maintains pressure balance between the two chambers.
The invention discloses a double gate valve for deep water, which adopts a double structure, so that the double gate valve is one-to-one and provides safety guarantee for use; the internal cavity of the driving mechanism is correspondingly communicated with a pressure compensation mechanism; the pressure balance of the two side cavities is kept through the movement of the elastic part of the pressure compensation mechanism; therefore, the influence of the seawater pressure on the gate valve can be counteracted, the gate valve can be applied to deep sea operation, and the requirement of deep water operation is met.
Advantageously, referring to fig. 3, each pressure compensating mechanism 400 includes: a pressure compensating mechanism housing 401, a connecting tube 402, and a bladder 403; one side of the pressure compensation mechanism shell 401 is fixed with a 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 connected with the inner chamber of the driving mechanism 300 in a sealing way and is communicated with the inner chamber of the driving mechanism 300; the bladder 403 divides the interior cavity of the pressure compensating mechanism housing 401 into two parts and maintains pressure balance on both sides thereof, wherein the interior chamber of the drive mechanism 300, the pressure compensating mechanism housing 401 and the bladder 403 are all filled with the same density fluid. The bag is made of rubber, preferably nitrile rubber, the interior of the bag is filled with fluid, the movement of the bag changes the volumes of two chambers in the inner cavity of the shell of the pressure compensation mechanism, and the pressures at the two sides are regulated to be balanced. The invention is thus applicable to sea depths greater than 3000 meters and rated operating pressures greater than 15000psi.
Advantageously, the fluid is a preservative solution, preventing the internal parts of the gate valve from rusting.
More advantageously, the pressure compensating mechanism housing 401 includes a first housing 4011 and a second housing 4012, one side of the first housing 4011 is welded with a connecting pipe 402, the other side forms an open opening, the open edge has a connecting flange 405, one side of the second housing 4012 forms an opening, the open edge forms a flange corresponding to the connecting flange 405, and the first housing 4011 and the second housing 4012 form a chamber by bolting; the edge of the bag 403 is sheet-shaped and is fixed between the connecting flange 405 and the flange in a sealing manner; the first housing 4011 and the bladder 403 form a fluid-filled chamber in communication with the interior chamber of the drive mechanism 300; a pressure regulating cavity communicating with the outside is formed between the pouch 403 and the second housing 4012. Whereby the bladder is secured between the first and second housings while the bladder seals the flange between the first and second housings.
One design factor affecting pressure compensation is the change in volume of the spring chamber when the valve is opened and closed, and the other is the change in compressed volume of the compensation liquid at high pressure.
Referring to fig. 2, the drive mechanism 300 includes, in order from top to bottom, a stationary shroud 301, a sheath 302, and a spring housing 303; shroud 301 is open at the top and defines an ROV drive bore; the sheath 302 is connected with an operation rod 3021, and the top end of the operation rod 3021 penetrates out of the sheath 302 and corresponds to the driving hole; the lumen of the sheath 302 is filled with fluid and is in fixed communication with the pressure compensating mechanism 400; the lower end of the operation rod 3021 is inserted into and rotated in the inner cavity of the spring housing 303 and is in threaded connection with the bracket 3031; a spring seat 3032 is sleeved on the support 3031, and a limit is formed between the support 3031 and the spring seat 3032 through a limit 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; piston shaft 3034 is fixed to valve stem 800. Referring to fig. 5, the limiting member 3035 may be a flat key, a keyway is disposed on the outer side of the support to mount 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 axial direction of the support.
Advantageously, the spring 3033 comprises a large spring and a small spring in a nested arrangement with opposite sense of rotation. The spring related parameters are selected according to the opening force of the gate valve, and the large spring is sleeved with the small spring to bear compression together, so that the opening force of the gate valve can be increased, the setting of the spring is reduced, and the rotation directions of the large spring and the small spring are opposite to each other to prevent movement interference.
In the embodiment of the invention, the hydraulic cylinder 500 is further included, the bottom of the spring housing 303 is connected with the hydraulic cylinder 500 in a sealing way, the bottom of the piston shaft 3034 is fixed with the hydraulic piston 501, the top of the valve rod 800 is fixed with the hydraulic piston 501, and an oil duct of the hydraulic cylinder 500 is connected with underwater hydraulic control or is connected with ground remote hydraulic control. Therefore, a second set of driving mode is adopted and independent from ROV driving power, so that the operation safety is ensured.
In another embodiment of the present invention, referring to fig. 4, the display mechanism 600 is further included, and the display mechanism 600 includes: rack 601, gear assembly 602, 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; gear assembly 602 includes gear shaft mount 6021, gear 6022, and gear shaft 6023; the gear shaft fixing frame 6021 is fixed at the bottom in 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 fixing frame 6021 extends out of the sheath 302 and is fixed with a display block 603, and a valve switch mark is arranged on the display block 603. The display block can be a rectangular block, one side of the display block is provided with O, the other side of the display block is provided with S, the display block rotates 180 degrees along with the gear shaft, the display block is respectively displayed as O or S, and the ROV can observe and confirm the valve opening and closing state.
In other embodiments of the present invention, each valve body structure includes a valve body 103, an upper end cap 104, a lower end cap 105, and a seal seat 106; the valve body 103 is provided with a circulation channel 101 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 sealed and fixed through an upper end cover 104 and a lower end cover 105, and two sealing seats 106 are respectively arranged in the valve cavity 102 corresponding to the two sides of the valve plate 200; the upper end cap 104 has a through hole of the valve rod 800, the lower end cap 105 has a through hole of the balance rod 700, and one end of the balance rod 700 is fixed to the bottom of the valve plate 200 and has the same outer diameter as the valve rod 800. The grooves in the upper end cover and the lower end cover are respectively provided with a bidirectional sealing filler 107, so that internal and external sealing is ensured, and meanwhile, the outer diameters of the balance rod and the valve rod are the same, so that the valve cavity is ensured to have no volume change in a switching state, and the switching torque is reduced.
Therefore, the invention provides the high-pressure-resistant high-sealing-performance high-reliability double gate valve for deep water, which is applicable to the sea water depth of more than 3000 m and rated working pressure 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 choke manifold system and an underwater production system, and can meet the requirements of offshore oil drilling and production at home and abroad.
In the use of the invention, the ROV driving end can be inserted into the driving hole at the top of the shield to drive the operation rod to rotate, and the support is in threaded connection with the operation rod, so that the support axially moves (moves downwards) in the spring shell and pushes the spring seat downwards to compress the spring, the piston rod is pushed to drive the valve rod and the valve plate to move downwards, and then the through hole on the valve plate is far away from the interception channel to block the circulation channel, and the sealing seats at the two sides of the valve plate are sealed; the pressure compensation mechanism is always in a compensation state, the display device, the spring seat moves downwards to drive the rack to move downwards, the gear is further driven to rotate, the gear shaft drives the display block to rotate, and the display device is closed to display S; when the circulation channel needs to be opened, the ROV rotates 180 degrees, so that all parts return, the valve plate is opened, and the display block displays O; the ROV observes this change under water and feeds it back to the control side.
The invention is also provided with a hydraulic cylinder drive, when external liquid is filled into the hydraulic cylinder, the compression hydraulic piston moves downwards, and then the piston shaft and the spring seat are driven to move downwards (at the moment, the spring seat and the support move relatively along the axial direction), and the spring is compressed; the valve rod is driven by the hydraulic piston to move downwards, so that the through hole on the valve plate is far away from the shutoff channel, and the gate valve is closed; the spring seat moves downwards to drive the rack to move downwards, so that the gear is driven to rotate, the gear shaft drives the display block to rotate, and the S is displayed in a closed state; when the circulation channel is required to be opened, under the action of the restoring elasticity of the spring, the part above the spring seat and the part below the piston rod are pushed to return, so that the through hole on the valve plate is communicated with the circulation channel, and the display block displays O; the ROV observes this change under water and feeds it back to the control side.
The display device can work normally no matter which way is used for driving; the two driving modes are adopted to be independently arranged, and the two gate valves are arranged in parallel, so that the use safety of the gate valves is ensured. 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 reasonable structure, high sealing reliability, simple operation, convenient use, visual switch display and capability of operating in a deepwater environment.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present invention. In this specification, schematic representations of the above terms are not necessarily directed 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. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (8)
1. A double gate valve for deep water, comprising: 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; a valve cavity (102) communicated with the circulation channel (101) is arranged in each valve body structure; a valve plate (200), wherein each valve cavity (102) is internally provided with one valve plate (200); the driving mechanisms (300), 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 plates (200) are driven by a valve rod (800) to be communicated with or cut off the circulation channel (101); the pressure compensation mechanism (400) is divided into two cavities by an elastic piece, and the cavity in each driving mechanism (300) is correspondingly communicated with one cavity of the pressure compensation mechanism (400); the other cavity of each pressure compensation mechanism (400) is communicated with the outside, and the pressure balance between the two cavities is kept; the pressure compensation mechanism (400) is provided with a pressure compensation mechanism shell (401), the pressure compensation mechanism shell (401) comprises a first shell (4011) and a second shell (4012), and the cavities of the first shell (4011) and the second shell (4012) are symmetrically arranged along the joint surface of the first shell and the second shell;
wherein, the driving mechanism (300) sequentially comprises a fixed shield (301), a sheath (302) and a spring shell (303) from top to bottom; the shroud (301) is open at the top and defines an ROV drive bore; an operation rod (3021) is connected in the sheath (302), and the top end of the operation 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 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 is in threaded connection with the support (3031); a spring seat (3032) is sleeved on the support (3031), and a limit is formed between the support (3031) and the spring seat (3032) through a limit piece (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 with the valve rod (800);
further comprising a display mechanism (600), the display mechanism (600) comprising: a rack (601), a gear assembly (602) and 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 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).
2. A double gate valve for deep water according to claim 1, wherein each of said pressure compensating mechanisms (400) comprises: a pressure compensation mechanism housing (401), a connecting tube (402), and a bag (403); one side of the pressure compensation mechanism shell (401) is fixed 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 connected with the inner chamber of the driving mechanism (300) in a sealing way and is communicated with the inner chamber of the driving mechanism (300); the bladder (403) divides the inner cavity of the pressure compensating mechanism housing (401) into two parts and keeps the pressure balance on both sides, wherein the inner cavity of the driving mechanism (300), the pressure compensating mechanism housing (401) and the bladder (403) are all filled with the same density fluid.
3. A double gate valve for deep water according to claim 2, wherein the fluid is a preservative solution.
4. The double gate valve for deep water according to claim 2, wherein one side of the first housing (4011) is welded with the connecting pipe (402), the other side is formed with an open mouth, the open mouth edge is provided with a connecting flange (405), one side of the second housing (4012) is formed with an opening, the opening edge is formed with a flange corresponding to the connecting flange (405), and the first housing (4011) and the second housing (4012) are formed into a chamber by bolting; the edges of the pockets (403) are sheet-shaped and are sealingly secured between the connecting flange (405) and the flange; the first housing (4011) and the bladder (403) form 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 springs (3033) comprise a large spring and a small spring arranged in a stack and having opposite rotation directions.
6. The double gate valve for deep water according to claim 1, further comprising a hydraulic cylinder (500), wherein the hydraulic cylinder (500) is connected to the bottom of the spring housing (303) in a sealing manner, 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 duct of the hydraulic cylinder (500) is connected to an underwater hydraulic control or to a ground remote hydraulic control.
7. The double gate valve for deep water according to 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 valve body (103) is provided with the circulation channel (101) 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 sealed and fixed 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).
8. The double gate valve for deep water according to claim 7, wherein the lower end cap (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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| CN114251477B (en) * | 2021-12-23 | 2024-05-28 | 中海油深圳海洋工程技术服务有限公司 | Deep water integrated ROV single-operation multi-isolation valve |
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