CN109538813B - Redundant drive underwater gate valve actuating mechanism - Google Patents
Redundant drive underwater gate valve actuating mechanism Download PDFInfo
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- CN109538813B CN109538813B CN201811513367.8A CN201811513367A CN109538813B CN 109538813 B CN109538813 B CN 109538813B CN 201811513367 A CN201811513367 A CN 201811513367A CN 109538813 B CN109538813 B CN 109538813B
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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
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
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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
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating 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
- 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
Abstract
The invention provides a redundant driving underwater gate valve executing mechanism. Comprising the following steps: a hydraulic drive device, wherein the piston and the piston rod are arranged so that the piston drives the piston rod to move downwards when the piston moves downwards actively, and the piston rod is separated from the piston when the piston moves downwards actively; an ROV drive having a threaded shaft, a drive nut, and a sleeve; the transmission nut and the sleeve part are arranged in the cylinder part in a vertically movable way; the sleeve is positioned at the lower side of the transmission nut, and the lower end of the sleeve is a contact plate for the upper end of the piston rod to contact and lean against; the threaded shaft is rotatably arranged on the upper cover part and is matched with the transmission nut; the pressure compensator is arranged on the mechanism shell through a bracket and is connected with the pressure compensation joint through a compensation oil pipe so as to be communicated with the inside of the mechanism shell. The hydraulic drive and ROV operation structure can be separated and independent, and dynamic balance of the internal pressure and the external pressure of the mechanism shell can be ensured under the action of high pressure in deep sea.
Description
Technical Field
The invention relates to the field of deep sea oil and gas field development, in particular to a redundant driving underwater gate valve executing mechanism.
Background
The underwater gate valve is a key component of a marine oil and gas field production tree and an underwater manifold, and plays an important role in an underwater oil production system. The underwater gate valve actuating mechanism is a driving device which can drive the underwater gate valve to a fully-opened or fully-closed position or control the opening of the underwater gate valve according to a command. Currently existing underwater gate valve actuators are mostly hydraulically driven, electrically operated, ROV operated or compound operated. However, the existing composite underwater gate valve actuator needs two drives to be matched with each other or the other drive is in a specified state to finish the opening and Guan Zhafa actions, and the completely independent redundant drive is not realized. The patent document with the application number of CN201611021928.3 proposes a high-reliability hydraulic underwater gate valve, but the hydraulic drive and the screw drive of the device are not completely independent, when the gate valve is opened or closed by adopting the screw drive, a piston can be linked in a hydraulic cylinder, and the hydraulic cylinder oil port is required to be kept smooth so as to ensure that the hydraulic cylinder sucks and returns oil without holding pressure, and the gate valve cannot be opened or closed. Moreover, the existing underwater gate valve actuator has the following problems: the underwater gate valve actuating mechanism works on the submarine oil extraction system, so that the maintenance is very difficult when faults occur, the production stopping of the oil extraction system is required to be matched with the maintenance, the normal production of an underwater oil and gas field is seriously influenced, and the reliability of the underwater gate valve actuating mechanism is higher; as the water depth increases, the external pressure is continuously increased, and the underwater gate valve executing mechanism is required to bear higher external pressure; the opening of the high pressure underwater gate valve requires a greater output force from the gate valve actuator.
Disclosure of Invention
The invention aims to overcome at least one defect of opening and closing of the existing underwater gate valve, and provides a redundant driving underwater gate valve actuating mechanism which can realize separation and independence of two structures of hydraulic driving and ROV operation, can completely and independently open and close the gate valve and has higher reliability.
The invention also aims to ensure the dynamic balance of the internal pressure and the external pressure of the mechanism shell under the action of high pressure in deep sea, and avoid the pressure bearing of the mechanism shell.
It is a further object of the present invention to automatically ensure coaxiality of the position indication rod with the corresponding mounting hole, reduce the risk of the position indication rod being blocked, and improve the reliability of the position indication rod.
The invention further aims to avoid the pressure build-up in the hydraulic cylinder during the operation of opening and closing the gate valve, and further improve the reliability of the underwater gate valve actuating mechanism.
In order to achieve at least one of the above objects, the present invention provides a redundant driving underwater gate valve actuator, including a valve body end cover and a valve rod penetrating the valve body end cover in a manner of moving up and down and being in sealing connection with the valve body end cover, wherein the redundant driving underwater gate valve actuator further includes:
the hydraulic driving device is connected to the valve body end cover and is provided with a piston rod, at least one cylinder body and at least one piston; the lower end of the piston rod is fixedly connected with the upper end of the valve rod, each piston is arranged on the piston rod, the piston and the piston rod are arranged so that the piston drives the piston rod to move downwards when the piston moves downwards actively, and the piston rod is separated from the piston when the piston moves downwards actively; the piston rod is provided with an oil return channel communicated with the upper end surface of the piston rod and an oil return hole communicated with the oil return channel and each cylinder body; the oil return hole communicated with each cylinder body is positioned at the lower side of the piston in the corresponding cylinder body;
the mechanism shell is connected with the valve body end cover or the hydraulic driving device, and a pressure compensation joint is arranged on the mechanism shell;
the reset assembly is arranged in the mechanism shell and comprises a compression spring and a hook barrel; the upper end of the piston rod is connected with the hook cylinder so as to synchronously move with the hook cylinder; the compression spring is configured to compress and store energy when the hook cylinder moves downwards so as to promote the hook cylinder to move upwards;
the upper end cover is arranged at the upper end of the mechanism shell and is provided with an upper cover part and a barrel part which extends downwards from the upper cover part and is inserted into the hook barrel;
a valve stem position indicating assembly having a position indicating rod, a return spring and a spherical contact seat; the spherical contact seat is in contact and propped against the upper end of the hook cylinder; the position indication rod is arranged on the upper cover part in a vertically movable manner, the upper end of the position indication rod extends out of the upper end cover, and the lower end of the position indication rod is arranged on the spherical contact seat; the return spring is sleeved on the position indication rod and is configured to prompt the position indication rod to move downwards; and
an ROV drive having a threaded shaft, a drive nut, and a sleeve; the transmission nut and the sleeve part are arranged in the cylinder part in a vertically movable way; the sleeve is positioned at the lower side of the transmission nut, and the lower end of the sleeve is a contact plate for the upper end of the piston rod to contact and lean against; an oil return through hole which is coaxially arranged with the oil return channel is formed in the center of the contact plate; the threaded shaft is rotatably arranged on the upper cover part and is matched with the transmission nut so as to drive the transmission nut to ascend or descend when rotating; and
the pressure compensator is installed in the mechanism shell through a support, and is connected with the pressure compensation joint through a compensation oil pipe so as to be communicated with the inside of the mechanism shell.
Optionally, the at least one cylinder comprises a first cylinder; the first cylinder body comprises a first cylindrical part, a first cover part for closing the upper end of the first cylindrical part, and an annular cover part which extends outwards from the lower end of the first cylindrical part to close the lower end of the mechanism shell;
the at least one piston includes a first piston disposed within the first cylindrical portion.
Optionally, the at least one cylinder further comprises a second cylinder body, the second cylinder body comprises a second cylindrical part, and a second cover part for closing the upper end of the second cylindrical part; the outer wall surface of the second cylindrical part is flush with the outer wall surface of the mechanism shell; and is also provided with
The at least one piston further comprises a second piston, the second piston being disposed within the second cylindrical portion;
the valve body end cover is arranged at the lower end of the second cylindrical part.
Optionally, the piston rod comprises a first sub-rod and a second sub-rod, and the first sub-rod is arranged on the upper side of the second sub-rod; the first piston is sleeved on the first sub-rod; the second piston is sleeved on the second sub-rod; the first sub-rod is fixedly connected with the second sub-rod.
Optionally, the first sub-rod and the second sub-rod each comprise a rod part and a connecting block positioned at the lower end of the rod part; the diameter of the connecting block is larger than that of the rod part so as to be in contact with and abutted against the corresponding first piston or second piston; the connecting block is provided with a connecting hole with a downward opening;
the upper end of the second sub rod or the valve rod is inserted into the corresponding connecting hole.
Optionally, a locking mechanism is arranged between each piston and the piston rod, and the locking mechanism is provided with a fixed ring fixedly sleeved on the piston rod and a plurality of locking pieces extending downwards from the fixed ring; the locking pieces are uniformly distributed along the circumferential direction of the fixed ring, and every two adjacent locking pieces are arranged at intervals;
an annular groove is arranged in the central hole of each piston, and a sealing ring is arranged in the annular groove.
Optionally, the upper cover part is provided with a yielding hole and a rotating hole from top to bottom in sequence;
a bearing is arranged in the rotating hole, and the threaded shaft is arranged on the bearing;
a bearing gland for sealing the rotating hole is arranged at the bottom of the abdication hole;
an ROV (ROV) interface cover for covering the abdication hole is arranged on the upper surface of the upper cover part.
Optionally, a through hole is formed in the bottom plate of the hook cylinder;
the upper end of the piston rod is provided with a baffle ring and a baffle sheet; the baffle ring is arranged between the baffle plate and the bottom plate of the hook cylinder.
According to the redundant driving underwater gate valve actuating mechanism, as the piston and the piston rod are arranged separately, the hydraulic driving structure and the ROV operation structure can be separated and independent, the gate valve can be completely and independently opened and closed, and the reliability is higher.
Further, due to the pressure compensator, dynamic balance of the internal pressure and the external pressure of the mechanism shell can be ensured under the action of high pressure in the deep sea, and pressure bearing of the mechanism shell is avoided.
Further, as the spherical contact seat in the valve rod position indicating assembly is in non-rigid connection with the hook barrel, coaxiality of the position indicating rod and the corresponding mounting hole can be automatically guaranteed, the risk of clamping the position indicating rod is reduced, and the reliability of the position indicating rod is improved.
Further, the oil return channel and the oil return hole are formed in the piston rod, and the oil return through hole is formed in the sleeve, so that pressure build-up in the hydraulic cylinder during gate valve opening and closing operation can be avoided, and the reliability of the redundant driving underwater gate valve executing mechanism is further improved.
Further, the hydraulic valve can be provided with at least two cylinders and two pistons, namely, two mutually independent hydraulic cylinders are adopted, so that the hydraulic valve has higher reliability and larger opening force for the high-pressure underwater gate valve. And in the event of damage to one cylinder drive system, the other cylinder drive system may continue to operate.
Further, as the locking mechanism is arranged between each piston and the piston rod, the special structure of the locking mechanism can prevent hydraulic oil from flowing to the lower side of the piston as much as possible, and the sealing performance is ensured.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
FIG. 1 is a schematic front view of a redundant drive subsea gate valve actuator according to one embodiment of the invention;
FIG. 2 is a schematic top view of the redundant drive subsea gate valve actuator of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken in the direction A-A of FIG. 2;
fig. 4 is a schematic cross-sectional view in the direction B-B in fig. 3.
Detailed Description
Fig. 1 is a schematic front view of a redundant drive subsea gate valve actuator according to one embodiment of the invention. As shown in fig. 1 and referring to fig. 2 to 4, an embodiment of the present invention provides a redundant drive underwater gate valve actuator. The redundant drive underwater gate valve actuator comprises a valve body end cover 20, a valve rod 21 which is arranged in the valve body end cover 20 in a penetrating manner in an up-and-down moving manner and is in sealing connection with the valve body end cover 20, a hydraulic drive device 30, a mechanism shell 40, a reset assembly 50, an upper end cover 60, a valve rod position indication assembly 70, an ROV drive device 80 and a pressure compensator 90.
A hydraulic drive device 30 is connected to the valve body end cap 20 and has a piston rod, at least one cylinder and at least one piston. Each piston is located in one cylinder. The lower end of the piston rod is fixedly connected with the upper end of the valve rod 21, and each piston is arranged on the piston rod. The piston and the piston rod are arranged such that the piston when driving downward moves the piston rod downward, and the piston rod is separated from the piston when driving downward. The piston rod is provided with an oil return channel 31 communicated with the upper end surface of the piston rod and an oil return hole communicated with the oil return channel 31 and each cylinder body; an oil return hole communicated with each cylinder body is positioned at the lower side of the piston in the corresponding cylinder body.
The mechanism housing 40 may be connected to the valve body end cap 20 or the hydraulic drive device 30, and a pressure compensating joint 91 is mounted on the mechanism housing 40. The reset assembly 50 is disposed within the mechanism housing 40 and includes a compression spring 51 and a hook 52. The upper end of the piston rod is connected to the hooking cylinder 52 to move synchronously with the hooking cylinder 52. The compression spring 51 is configured to compress the stored energy as the hook 52 moves downward to urge the hook 52 upward. The upper cover 60 is provided at the upper end of the mechanism case 40, and has an upper cover portion 61 and a tube portion 62 extending downward from the upper cover portion 61 and into which the hook tube 52 is inserted. The piston rod and hook 52 may precompress the compression spring 51.
The valve stem position indicating assembly 70 has a position indicating rod 71, a return spring 72, and a ball contact seat 73. The spherical contact seat 73 is contacted and abutted with the upper end of the hook 52. The position indication lever 71 is vertically movably attached to the upper cover 61, and the upper end of the position indication lever 71 extends out of the upper cover 60, and the lower end thereof is attached to the spherical contact seat 73. The return spring 72 is fitted around the position indicating lever 71 and configured to urge the position indicating lever 71 to move downward. The coaxiality of the position indication rod 71 and the corresponding mounting hole can be automatically adjusted through the spherical contact with the hook barrel 52, and the reliability of the position indication rod 71 is improved.
ROV drive 80 has a threaded shaft 81, a drive nut 82, and a sleeve 83. The drive nut 82 and the sleeve portion 62 are disposed in the barrel portion 62 so as to be movable up and down. The sleeve 83 is on the underside of the drive nut 82 and the lower end of the sleeve 83 is a contact plate for the upper end of the piston rod to contact against. An oil return through hole coaxially arranged with the oil return passage 31 is provided in the center of the contact plate. The screw shaft 81 is rotatably installed to the upper cover 61 and cooperates with the driving nut 82 to drive the driving nut 82 to rise or fall when rotated. The piston and the piston rod are arranged so that the piston drives the piston rod to move downwards when the piston is actively moved downwards, and the piston rod is separated from the piston when the piston is actively moved downwards, so that the hydraulic cylinder is not required to suck back oil when the ROV is operated, and the ROV is completely independent.
The oil return channel 31 is arranged in the piston rod, so that hydraulic oil at the lower part of the hydraulic cylinder can be discharged into the actuating mechanism shell 40 during hydraulic driving, and the hydraulic cylinder is prevented from being blocked and the gate valve can not be opened. When the ROV is operated, the diameter difference of the piston rod and the valve rod 21 causes the volume change of the hydraulic cylinder, the oil return through holes on the oil return channel 31 and the sleeve 83 are matched to realize oil suction and oil return, the pressure is prevented from being suppressed, and the gate valve is ensured to be opened and closed more reliably.
The pressure compensator 90 is mounted to the mechanism housing 40 by a bracket 92. And the pressure compensator 90 is connected to the pressure compensating joint 91 through a compensating oil pipe 93 to communicate with the inside of the mechanism housing 40. The mechanism shell 40 and the pressure compensator 90 are filled with hydraulic oil, one side of the pressure compensator 90 is communicated with the actuator shell 40, and the other side is communicated with seawater, so that dynamic balance between the pressure of the seawater inside the mechanism shell 40 and the pressure of the seawater outside the mechanism shell is realized. Namely, under the action of high pressure in deep sea, dynamic balance of the internal pressure and the external pressure of the mechanism shell 40 can be ensured, and the mechanism shell 40 is prevented from bearing pressure.
In some embodiments of the invention, at least one cylinder comprises a first cylinder 32. The first cylinder 32 includes a first cylindrical portion, a first cover portion closing an upper end of the first cylindrical portion, and an annular cover portion extending outwardly from a lower end of the first cylindrical portion to close a lower end of the mechanism case 40. The at least one piston includes a first piston 33, the first piston 33 being disposed within the first cylindrical portion.
In some embodiments of the present invention, a multiple cylinder drive mode may be employed, one cylinder may be operated, the remaining cylinders may be ready for use, or multiple cylinders may be driven simultaneously. For example, the at least one cylinder further includes a second cylinder 34, the second cylinder 34 including a second cylindrical portion, and a second cover portion closing an upper end of the second cylindrical portion. The outer wall surface of the second cylindrical portion is flush with the outer wall surface of the mechanism case 40. And at least one piston further comprises a second piston 35, the second piston 35 being disposed within the second cylindrical portion. The valve body cover 20 is provided at the lower end of the second cylindrical portion.
Further, the piston rod may be integrally formed, and may also include a first sub-rod 36 and a second sub-rod 37, where the first sub-rod 36 is disposed on an upper side of the second sub-rod 37. The first piston 33 is sleeved on the first sub-rod 36. The second piston 35 is sleeved on the second sub rod 37. The first sub-lever 36 is fixedly connected with the second sub-lever 37. The first sub-lever 36 and the second sub-lever 37 each include a lever portion and a connection block at the lower end of the lever portion. The diameter of the connection block is greater than the diameter of the stem to contact against the respective first 33 or second 35 piston. The connecting block is provided with a connecting hole with a downward opening. The upper end of the second sub-rod 37 or the valve stem 21 is inserted into the corresponding connection hole.
Further, the upper side of the annular cover portion may be provided with a spring seat 53. The spring seat 53 is mounted on a three-piece spring seat retainer 54, and the spring seat retainer 54 is disposed in a groove in the mechanism housing 40, so that the mechanism housing 40, the first cylinder 32, the second cylinder 34, and the valve body end cover 20 are fastened and connected. The valve body end cover 20, the first cylinder body 32, the second cylinder body 34 and the spring seat 53 are sequentially connected by adopting the stud 22 and the nut 23, and the waterproof nut 24 is arranged to prevent seawater from penetrating.
The second piston 35 is installed in the second cylinder 34 and penetrates through the second sub-rod 37, the second sub-rod 37 is in threaded connection with the valve rod 21, the second piston 35 rod is positioned with the second cylinder 34 by adopting a hydraulic cylinder gland 45 arranged on the second cover part, and the valve rod 21 is positioned with the valve body end cover 20 by adopting an end cover gland 46 installed on the inner surface of the valve body end cover 20. The first piston 33 is installed in the first cylinder 32 and penetrates through the first sub-rod 36, the second sub-rod 37 is in threaded connection with the first sub-rod 36, and the first sub-rod 36 is positioned by adopting the first cylinder 32 and a hydraulic cylinder gland 47 on the first cover part. The connecting hole is a threaded hole. The first cylinder 32 is further provided with an oil path, which may include a first oil inlet 38 and a first oil outlet; the second cylinder 34 is also provided with an oil path, which may include a second oil inlet 39 and a second oil outlet.
In some embodiments of the present invention, a locking mechanism is disposed between each piston and the piston rod, the locking mechanism having a retaining ring fixedly secured to the piston rod and a plurality of locking tabs extending downwardly from the retaining ring. The locking pieces are uniformly distributed along the circumferential direction of the fixing ring, and every two adjacent locking pieces are arranged at intervals. Further, an annular groove is arranged in the central hole of each piston, and a sealing ring is arranged in the annular groove.
In some embodiments of the present invention, the upper cover 61 is provided with a relief hole and a rotation hole in order from top to bottom. A bearing is installed in the rotation hole, and a screw shaft 81 is installed in the bearing. The bearings may include a first bearing 63 and a second bearing 64. The bottom of the relief hole is provided with a bearing cap 65 closing the rotation hole, which can be connected for example by means of a bolt 66. The upper surface of the upper cover 61 is provided with an ROV interface cover 67 that covers the relief hole. ROV interface cover 67 is mounted to upper cover 61 by stud 75 and bolt 76, and is fitted with waterproof nut 77 to prevent seawater infiltration. The bottom plate of the hook 52 is provided with a through hole. The upper end of the piston rod is provided with a stop ring 57 and a stop 56. The baffle 57 is disposed between the baffle 56 and the bottom plate of the hook 52.
Further, the driving nut 82 may be a hexagonal nut, and the sleeve 83 is connected with the driving nut 82 through a bolt 84. The side of the sleeve 83 may be provided with oil outlet holes. When the ROV drive is not in use, the sleeve 83 is in a fully disengaged condition of no contact with the piston rod. The upper end cap 60 is connected to the mechanism housing 40 by a stud 45 and a nut 46, and is fitted with a waterproof nut 47 to prevent infiltration of seawater. The position indication rod 71 and the spherical contact seat 73 may be connected by screw threads. The outside of the upper end cap 60 is provided with a position indication plate 78 for reference of the position indication rod 71.
When the redundant driving underwater gate valve executing mechanism provided by the embodiment of the invention works, the first cylinder body 32 and the first piston 33 can be used for pushing the piston rod to move downwards, so that the valve rod 21 is driven to move downwards to open the gate valve. The piston rod drives the hook 52 to move downward, compressing the compression spring 51. The position indicating rod 71 on the upper end surface of the hook 52 moves downward together under the action of the return spring 72 to indicate the gate valve to open. The hydraulic oil pressure in the first cylinder 32 is kept constant, and the gate valve is in a normally open state. Alternatively, the piston rod may be pushed downward by the second cylinder 34 and the second piston 35. Still alternatively, the piston rod is pushed to move downward simultaneously with the first cylinder 32, the first piston 33, the second cylinder 34, and the second piston 35. When the gate valve needs to be closed, the hydraulic oil pressure is withdrawn, the compression spring 51 pushes the hook cylinder 52 under the action of restoring force, the hook cylinder 52 drives the piston rod and the valve rod 21 to move upwards to realize closing of the gate valve, and the position indication rod 71 on the upper end surface of the hook cylinder 52 moves upwards together under the action of thrust of the hook cylinder 52 to indicate that the gate valve is closed. When one hydraulic cylinder fails, the other hydraulic cylinder can also independently open and close the gate valve.
ROV drive 80 may operate when multiple hydraulic cylinders fail, or may operate in other situations. Specifically, when the gate valve needs to be opened, the underwater torque tool drives the threaded shaft 81 to rotate, the threaded shaft 81 drives the transmission nut 82 and the sleeve 83 to move downwards through threads, the contact plate of the sleeve 83 moves downwards to push the piston rod and the valve rod 21 to move downwards together, and meanwhile, the piston rod pulls the hook barrel 52 to compress the compression spring 51 through the baffle ring, and the position indication rod 71 on the upper end surface of the hook barrel 52 moves downwards together under the action of the position indication reset spring 72 to indicate that the gate valve is opened. The torsion tool is kept not to rotate, and the gate valve is in a normally open state. When the gate valve needs to be closed, the torque tool drives the threaded shaft 81 to reversely rotate, the threaded shaft 81 drives the transmission nut 82 and the sleeve 83 to move upwards through threads, the compression spring 51 pushes the hook cylinder 52 under the action of restoring force, the hook cylinder 52 drives the piston rod and the valve rod 21 to move upwards to realize closing of the gate valve, and the position indication rod 71 on the upper end surface of the hook cylinder 52 moves upwards together under the action of the thrust of the hook cylinder 52 to indicate that the gate valve is closed.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.
Claims (6)
1. The utility model provides a redundant drive is sluice valve actuating mechanism under water, includes valve body end cover and can wear to locate with the up-and-down motion in the valve body end cover and with valve body end cover sealing connection's valve rod, its characterized in that, redundant drive is sluice valve actuating mechanism under water still includes:
the hydraulic driving device is connected to the valve body end cover and is provided with a piston rod, at least one cylinder body and at least one piston; the lower end of the piston rod is fixedly connected with the upper end of the valve rod, each piston is arranged on the piston rod, the piston and the piston rod are arranged so that the piston drives the piston rod to move downwards when the piston moves downwards actively, and the piston rod is separated from the piston when the piston moves downwards actively; the piston rod is provided with an oil return channel communicated with the upper end surface of the piston rod and an oil return hole communicated with the oil return channel and each cylinder body; the oil return hole communicated with each cylinder body is positioned at the lower side of the piston in the corresponding cylinder body;
the mechanism shell is connected with the valve body end cover or the hydraulic driving device, and a pressure compensation joint is arranged on the mechanism shell;
the reset assembly is arranged in the mechanism shell and comprises a compression spring and a hook barrel; the upper end of the piston rod is connected with the hook cylinder so as to synchronously move with the hook cylinder; the compression spring is configured to compress and store energy when the hook cylinder moves downwards so as to promote the hook cylinder to move upwards;
the upper end cover is arranged at the upper end of the mechanism shell and is provided with an upper cover part and a barrel part which extends downwards from the upper cover part and is inserted into the hook barrel;
a valve stem position indicating assembly having a position indicating rod, a return spring and a spherical contact seat; the spherical contact seat is in contact and propped against the upper end of the hook cylinder; the position indication rod is arranged on the upper cover part in a vertically movable manner, the upper end of the position indication rod extends out of the upper end cover, and the lower end of the position indication rod is arranged on the spherical contact seat; the return spring is sleeved on the position indication rod and is configured to prompt the position indication rod to move downwards; and
an ROV drive having a threaded shaft, a drive nut, and a sleeve; the transmission nut and the sleeve are arranged in the cylinder part in a vertically movable manner; the sleeve is positioned at the lower side of the transmission nut, and the lower end of the sleeve is a contact plate for the upper end of the piston rod to contact and lean against; an oil return through hole which is coaxially arranged with the oil return channel is formed in the center of the contact plate; the side wall of the sleeve is provided with an oil outlet; the threaded shaft is rotatably arranged on the upper cover part and is matched with the transmission nut so as to drive the transmission nut to ascend or descend when rotating; and
the pressure compensator is arranged on the mechanism shell through a bracket and is connected with the pressure compensation joint through a compensation oil pipe so as to be communicated with the inside of the mechanism shell;
the upper cover part is provided with a abdication hole and a rotation hole from top to bottom in sequence;
a bearing is arranged in the rotating hole, and the threaded shaft is arranged on the bearing;
a bearing gland for sealing the rotating hole is arranged at the bottom of the abdication hole;
an ROV (ROV) interface cover for covering the abdication hole is arranged on the upper surface of the upper cover part;
a through hole is formed in the bottom plate of the hook cylinder;
the upper end of the piston rod is provided with a baffle ring and a baffle sheet; the baffle ring is arranged between the baffle plate and the bottom plate of the hook cylinder.
2. The redundantly driven underwater gate valve actuator of claim 1,
the at least one cylinder includes a first cylinder; the first cylinder body comprises a first cylindrical part, a first cover part for closing the upper end of the first cylindrical part, and an annular cover part which extends outwards from the lower end of the first cylindrical part to close the lower end of the mechanism shell;
the at least one piston includes a first piston disposed within the first cylindrical portion.
3. The redundantly driven underwater gate valve actuator of claim 2,
the at least one cylinder body further comprises a second cylinder body, wherein the second cylinder body comprises a second cylindrical part and a second cover part for closing the upper end of the second cylindrical part; the outer wall surface of the second cylindrical part is flush with the outer wall surface of the mechanism shell; and is also provided with
The at least one piston further comprises a second piston, the second piston being disposed within the second cylindrical portion;
the valve body end cover is arranged at the lower end of the second cylindrical part.
4. The redundant drive underwater gate valve actuator of claim 3, wherein,
the piston rod comprises a first sub-rod and a second sub-rod, and the first sub-rod is arranged on the upper side of the second sub-rod; the first piston is sleeved on the first sub-rod; the second piston is sleeved on the second sub-rod; the first sub-rod is fixedly connected with the second sub-rod.
5. The redundantly driven underwater gate valve actuator of claim 4,
the first sub-rod and the second sub-rod comprise a rod part and a connecting block positioned at the lower end of the rod part; the diameter of the connecting block is larger than that of the rod part so as to be in contact with and abutted against the corresponding first piston or second piston; the connecting block is provided with a connecting hole with a downward opening;
the upper end of the second sub rod or the valve rod is inserted into the corresponding connecting hole.
6. The redundantly driven underwater gate valve actuator of claim 1,
a locking mechanism is arranged between each piston and the piston rod, and is provided with a fixed ring fixedly sleeved on the piston rod and a plurality of locking pieces extending downwards from the fixed ring; the locking pieces are uniformly distributed along the circumferential direction of the fixed ring, and every two adjacent locking pieces are arranged at intervals;
an annular groove is arranged in the central hole of each piston, and a sealing ring is arranged in the annular groove.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019205689A1 (en) | 2018-04-24 | 2019-10-31 | 苏州纽威阀门股份有限公司 | Actuating system for use in driving valve to open and close |
| CN110185834B (en) * | 2019-06-17 | 2022-02-01 | 中国石油大学(华东) | Pressure balance type underwater full-electric Christmas tree valve actuator |
| CN113048251B (en) * | 2021-02-26 | 2023-12-05 | 河北华北石油荣盛机械制造有限公司 | Duplex gate valve for deep water |
| CN114135540B (en) * | 2021-11-30 | 2023-08-15 | 哈尔滨工程大学 | Low-energy-consumption actuator utilizing hydraulic acting force |
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