valve

Abstract

This invention discloses a valve, including a valve structure, a valve stem, a drive device, a hydraulic interface, an emergency drive interface, and a motion conversion mechanism. The valve structure has a fluid channel and a valve cavity. The fluid channel extends along a first direction, and the valve cavity extends along a second direction and communicates with the fluid channel. The valve stem is movably disposed within the valve cavity. The drive device includes a housing and a piston rod. A piston cylinder is formed within the housing, and the piston rod is movably disposed within the piston cylinder, which communicates with the valve cavity. The piston rod and valve stem are linked together. The hydraulic interface is located on the valve structure and / or the housing. The emergency drive interface is linked together with the drive device. The motion conversion mechanism is disposed between the emergency drive interface and the piston rod. The pressurized medium introduced through the hydraulic interface and the driving force introduced through the emergency drive interface act independently on the piston to open or close the valve. This invention can reliably control fluid flow even when the hydraulic drive fails, ensuring the safety and reliability of the underwater production system.

Description

Technical Field

[0001] This invention belongs to the field of valve structure technology, and specifically relates to a valve. Background Technology

[0002] Valves are critical devices for controlling fluid flow in deep-sea oil and gas extraction systems. In subsea production environments, valves are typically hydraulically driven for remote, automated control. However, deep-sea conditions are complex, presenting risks such as high pressure, corrosion, and unpredictable external shocks. If the hydraulic drive system malfunctions due to pipeline leaks, hydraulic power interruption, or control component failure, the valves will lose their driving force, impacting the safety and reliability of the entire subsea production system.

[0003] Therefore, it is necessary to provide a valve to address the aforementioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a valve that can reliably control the flow of fluid even when the hydraulic drive system fails, thereby ensuring the safety and reliability of the underwater production system.

[0005] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution:

[0006] A valve, the valve comprising:

[0007] A valve structure having a fluid channel and a valve chamber, the fluid channel extending along a first direction, and the valve chamber extending along a second direction and communicating with the fluid channel;

[0008] A valve stem is movably disposed within the valve cavity and is used to control the opening and closing of the fluid passage;

[0009] A driving device, comprising a housing and a piston rod, wherein a piston cylinder is formed within the housing, the piston rod is movably disposed within the piston cylinder, the piston cylinder is connected to a valve chamber, and the piston rod is linked to a valve rod for driving the valve rod to move;

[0010] A hydraulic interface, provided on the valve structure and / or housing, is used to introduce pressurized medium;

[0011] An emergency drive interface, installed in conjunction with the drive device, is used to introduce driving force;

[0012] A motion conversion mechanism is disposed between the emergency drive interface and the piston rod, and is used to convert the driving force input from the emergency drive interface into a force that drives the piston rod to perform linear motion;

[0013] The pressurized medium introduced by the hydraulic interface and the driving force introduced by the emergency drive interface act independently on the piston to open or close the valve.

[0014] In one or more embodiments of the present invention, the valve structure includes a valve body, a valve cover, and a bracket that are fixedly installed sequentially along a second direction, the fluid passage is disposed in the valve body, the valve cavity passes through the valve body, the valve cover, and the bracket, a sealing ring is disposed between the valve cover and the valve body, and the driving device is fixedly installed with the bracket.

[0015] In one or more embodiments of the present invention, when the fluid passage is unobstructed, the piston rod abuts against the bracket, and when the fluid passage is disconnected, the valve rod abuts against the valve cover.

[0016] In one or more embodiments of the present invention, the valve stem includes a rod body that passes through the valve cavity and is connected to the piston rod, and a valve plate that passes through the fluid channel. The valve plate has a through hole. When the fluid channel is unobstructed, at least a portion of the orthographic projection of the through hole is within the range of the orthographic projection of the fluid channel. When the fluid channel is disconnected, the orthographic projection of the through hole is outside the range of the orthographic projection of the fluid channel.

[0017] In one or more embodiments of the present invention, the valve body is provided with an installation groove located in the fluid passage, and the valve structure further includes a valve seat disposed between the valve stem and the valve body, the valve seat being located in the installation groove, and at least one first sealing element being provided between the valve seat and the installation groove.

[0018] In one or more embodiments of the present invention, the valve structure further includes a pressure cap, which is fixedly installed in the bracket and partially extends into the valve cover. The valve stem, the valve cover, and the pressure cap form an installation cavity. A second sealing element is installed in the installation cavity. A third sealing element is provided between the valve cover and the pressure cap. A fourth sealing element is provided between the pressure cap and the valve stem.

[0019] In one or more embodiments of the present invention, at least one fifth seal is provided between the piston rod and the housing; and / or,

[0020] The drive unit further includes a relief valve and / or a hydraulic flushing port and / or a balancer disposed on the housing and connected to the piston cylinder; and / or,

[0021] The drive device further includes a reset member disposed in the housing, the reset member causing the piston rod to tend to move away from the valve structure.

[0022] In one or more embodiments of the present invention, the motion conversion mechanism includes:

[0023] The top flange is fixedly installed on the end of the drive device away from the valve structure.

[0024] The drive rod is connected to the emergency drive interface (5) and is capable of rotating relative to the top flange;

[0025] A drive nut is threadedly connected to the drive rod and abuts against the piston rod. One of the drive nut and the top flange is provided with a limiting groove, and the other is provided with a limiting block that cooperates with the limiting groove, so that the drive nut slides along the piston rod axis when the drive rod rotates.

[0026] In one or more embodiments of the present invention, the motion conversion mechanism further includes:

[0027] The top cover is installed on the end of the top flange away from the valve structure;

[0028] The first thrust bearing and the second thrust bearing are sleeved on the drive rod. The first thrust bearing abuts against the top flange (61) and the drive rod respectively, and the second thrust bearing abuts against the drive rod and the top cover respectively.

[0029] In one or more embodiments of the present invention, at least one sixth seal is provided between the drive rod and the top cover.

[0030] In one or more embodiments of the present invention, the valve further includes a position indicating mechanism, the position indicating mechanism comprising:

[0031] The upper support is sleeved on the outside of the piston rod and fixedly connected to the piston rod;

[0032] An indicator drive rod is fixed to the upper support. The indicator drive rod is provided with a pin. The top flange is provided with a guide groove. The pin is slidably embedded in the guide groove.

[0033] An indicator rod is rotatably sleeved on the outside of an indicator drive rod. The indicator rod has a spiral groove, and the pin extends into the spiral groove. The sliding of the indicator drive rod can be converted into the rotation of the indicator rod through the spiral groove.

[0034] A pointer is fixed to the end of the indicator rod. An indicator slot is provided on the emergency drive interface. The pointer is movably disposed in the indicator slot. An on indicator mark and an off indicator mark are respectively provided at both ends of the indicator slot.

[0035] Compared with the prior art, the valve of the present invention provides a deep-sea valve with a compact structure, reliable operation and redundant drive capability, which effectively solves the problem that the single hydraulic drive valve in the prior art cannot be operated in emergency situations, maintains the valve to work reliably for a long time, and ensures the safety and reliability of the underwater production system. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a three-dimensional structural diagram of a valve in one embodiment of the present invention;

[0038] Figure 2 This is a side view of the valve structure in one embodiment of the present invention;

[0039] Figure 3 This is a cross-sectional view of a valve in one embodiment of the present invention;

[0040] Figure 4 for Figure 3 Enlarged view of the local structure at point A;

[0041] Figure 5 for Figure 3 Enlarged view of the local structure at point B;

[0042] Figure 6 for Figure 3 Enlarged view of the local structure at point C;

[0043] Figure 7 for Figure 3 Enlarged view of the local structure at point D;

[0044] Figure 8 This is a cross-sectional view of a valve in one embodiment of the present invention;

[0045] Figure 9 This is a three-dimensional structural diagram of a portion of the valve in one embodiment of the present invention;

[0046] Figure 10 for Figure 9 A schematic diagram of the cross-sectional structure at point AA.

[0047] Explanation of key figure labels:

[0048] 1 Valve Structure

[0049] 11 Valve body

[0050] 111 Mounting Slot

[0051] 12 Valve cover

[0052] 13 stents

[0053] 14. Cap

[0054] 15 Valve seat

[0055] 161 First Seal

[0056] 162 Second seal

[0057] 163 Third seal

[0058] 164 Fourth seal

[0059] 101 Fluid Channel

[0060] 102 Valve cavity

[0061] 103 Installation cavity

[0062] 2. Valve stem

[0063] 21 rods

[0064] 22 Valve Plate

[0065] 221 Through hole

[0066] 3. Drive unit

[0067] 30 Fifth seal

[0068] 31. Shell

[0069] 311 Piston Cylinder

[0070] 32 Piston Rod

[0071] 33 Reset component

[0072] 34. Relief valve

[0073] 35 Hydraulic flushing port

[0074] 36. Balancer

[0075] 4. Hydraulic interface

[0076] 5 Emergency Drive Interface

[0077] 51 Indicator Slot

[0078] 52 Open indicator mark

[0079] 53. Closed indicator markers

[0080] 6. Motion conversion mechanism

[0081] 60 Sixth Seal

[0082] 61 Top Flange

[0083] 611 Guide groove

[0084] 62 drive levers

[0085] 63 Drive nut

[0086] 64 Top Cover

[0087] 65 First Thrust Bearing

[0088] 66 Second Thrust Bearing

[0089] 7. Position indicating mechanism

[0090] 71 upper support

[0091] 72 Indicator drive lever

[0092] 721 Pin

[0093] 73 Indicator Rod

[0094] 731 Spiral Groove

[0095] 74 pointers. Detailed Implementation

[0096] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0097] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0098] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0099] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0100] Reference Figures 1 to 3As shown, this embodiment provides a valve that is particularly suitable for underwater production systems in deep-sea conditions, such as chemical injection systems and hydraulic drive systems. The valve mainly includes a valve structure 1, a valve stem 2, a drive device 3, a hydraulic interface 4, an emergency drive interface 5, and a motion conversion mechanism 6.

[0101] Specifically, in this embodiment, the valve structure 1 serves as the carrier of the entire valve, and its interior is provided with a fluid channel 101 and a valve chamber 102. The fluid channel 101 is along a first direction (i.e., the direction of medium flow, such as...). Figure 1 The valve chamber 102 extends in the second direction (i.e., the direction of movement of the valve stem 2, as shown in the horizontal direction) to guide the inflow and outflow of the medium; the valve chamber 102 extends in the second direction (i.e., the direction of movement of the valve stem 2, as shown in the horizontal direction) to guide the inflow and outflow of the medium. Figure 1 The valve stem 2 extends vertically as shown in the diagram and connects to the fluid channel 101, forming an intersecting internal flow channel layout. This intersecting layout allows the lifting and lowering motion of the valve stem 2 to directly act on the valve plate 22 portion described later within the fluid channel 101, resulting in a short transmission path and rapid response.

[0102] The valve stem 2 is movably disposed within the valve cavity 102, with its lower end (i.e., the valve plate 22 portion) extending into the fluid passage 101 region to control the opening and closing of the fluid passage 101. When the valve stem 2 rises, the fluid passage 101 is cut off, and the valve is closed; when the valve stem 2 falls, the fluid passage 101 is unobstructed, and the valve is opened.

[0103] The movement of valve stem 2 is controlled by a drive device 3 mounted above valve structure 1. The drive device 3 includes a housing 31 and a piston rod 32. A piston cylinder 311 is formed inside the housing 31 and communicates with the valve chamber 102. The piston rod 32 is slidably mounted in the piston cylinder 311. The lower end of the piston rod 32 is linked to the upper end of valve stem 2. Specifically, the piston rod 32 and valve stem 2 can be assembled separately and then fixedly connected, or they can be designed as a single piece, as long as the lifting and lowering of the piston rod 32 can drive the valve stem 2 to move synchronously. This design makes the power transmission between the drive device 3 and valve stem 2 direct and reliable.

[0104] To achieve hydraulic actuation, a hydraulic interface 4 is provided on the housing 31 of the valve structure 1 and / or the drive device 3. This hydraulic interface 4 communicates with the piston cylinder 311 and is used to introduce pressurized medium, such as hydraulic oil, from an external hydraulic source. When the pressurized medium enters the piston cylinder 311 through the hydraulic interface 4, it acts on the pressure-bearing end face of the piston rod 32, pushing the piston rod 32 and the valve stem 2 to move, thereby achieving hydraulic actuation. The hydraulic interface 4 can be located on the valve body 11, on the housing 31 of the drive device 3, or both, to accommodate different piping layout requirements.

[0105] To enable emergency mechanical actuation, the drive unit 3 is also equipped with an emergency drive interface 5. This interface 5 is typically located at the end of the drive unit 3 furthest from the valve structure 1, and is used to dock with an external underwater robot tool (ROV tool) in emergency situations to introduce rotational driving force. Since the ROV tool inputs rotational motion, while the piston rod 32 requires linear motion, a motion conversion mechanism 6 is needed between the emergency drive interface 5 and the piston rod 32. The main function of this motion conversion mechanism 6 is to convert the input rotational force into a force that pushes the piston rod 32 to perform linear motion. In this embodiment, the motion conversion mechanism 6 is positioned between the emergency drive interface 5 and the piston rod 32, making the entire transmission chain compact and highly coaxial. The rotational driving force, after being input from the interface, is transmitted to the piston rod 32 via the shortest path, reducing force transmission losses and ensuring smooth and efficient transmission.

[0106] With the above structure, the valve in this embodiment has two independent operating modes. Under normal operating conditions, pressurized medium is introduced through hydraulic interface 4 to achieve hydraulic drive; in case of hydraulic system failure or manual intervention, ROV tools are connected through emergency drive interface 5, and the piston rod 32 is driven by motion conversion mechanism 6. The driving forces of the two modes act independently on the same piston rod 32 without interference. This dual-drive design solves the problem that the valve cannot be operated if the hydraulic source is interrupted or the pipeline leaks in the single hydraulic drive mode, ensuring the operability of the valve under any circumstances and significantly improving the safety of deep-sea operations.

[0107] Reference Figure 3 As shown, the valve structure 1 in this embodiment includes a valve body 11, a valve cover 12, and a bracket 13, which are sequentially fixed along the second direction. A fluid passage 101 is disposed inside the valve body 11, and a valve cavity 102 penetrates the valve body 11, valve cover 12, and bracket 13, forming a straight channel through which the valve stem 2 passes. The valve cover 12 is fastened to the valve body 11 with bolts, and a sealing ring is provided at the joint surface to prevent leakage of the medium from the connection point. The housing 31 of the drive device 3 is fixedly connected to the bracket 13 with bolts penetrating the bracket 13. The bracket 13 is located above the valve cover 12 and is fixedly installed to the valve cover 12 with bolts penetrating the bracket 13. This segmented structure facilitates independent processing and assembly of each component. The bracket 13 serves as a transitional connector, making the connection between the drive device 3 and the valve body 11 more stable and reliable, capable of withstanding external pressure and operating torque in deep-sea environments.

[0108] To determine whether a valve's movement is complete when the internal structure cannot be directly observed from the outside, refer to... Figure 3As shown, this embodiment incorporates a mechanical limiting mechanism in its structure. When the valve is open and the fluid passage 101 is unobstructed, the piston rod 32 moves downward until its lower section abuts against the bracket 13, which then acts as a limiting stop for the open position. When the valve is closed and the fluid passage 101 is disconnected, the valve stem 2 moves downward until it abuts against the internal step of the valve cover 12, which then acts as a limiting stop for the closed position. This limiting design ensures that the valve accurately reaches the fully open or fully closed position each time, and the operator can also sense the limiting mechanism by hand during operation, avoiding reliance on sensors and other electronic components and improving reliability in deep-sea environments.

[0109] Reference Figure 3 As shown, in this embodiment, the valve stem 2 includes an elongated rod 21 that penetrates the valve cavity 102 and is connected to the piston rod 32, and a valve plate 22 located within the fluid channel 101. The rod 21 and the valve plate 22 can be integrally formed or assembled separately and then fixedly connected. A through hole 221 is provided on the valve plate 22, and the shape and size of the through hole 221 match the fluid channel 101. When the driving device 3 drives the valve stem 2 to the open position, the through hole 221 is at least partially aligned with the fluid channel 101 (i.e., along the first direction, at least part of the orthographic projection of the through hole 221 is within the range of the orthographic projection of the fluid channel 101), so that the medium can flow through the valve plate 22 from the through hole 221 to realize the flow of the medium; when the valve stem 2 moves to the closed position, the through hole 221 is completely deviated from the fluid channel 101 (i.e., along the first direction, the orthographic projection of the through hole 221 is outside the range of the orthographic projection of the fluid channel 101), and the solid part of the valve plate 22 cuts off the fluid channel 101. This design enables the valve to be opened and closed quickly.

[0110] Reference Figure 3 , Figure 4 As shown, the valve body 11 has a mounting groove 111 at a corresponding position in the fluid passage 101, and the valve structure 1 also includes a valve seat 15 embedded in the mounting groove 111. The valve seat 15 is located between the valve plate 22 and the valve body 11. When the valve is closed, the sealing surface of the valve plate 22 and the sealing surface of the valve seat 15 are tightly fitted together to form a sealing contact, cutting off the flow of the medium. To prevent the medium from leaking from the gap between the valve seat 15 and the mounting groove 111, at least one first sealing element 161 is provided between the valve seat 15 and the mounting groove 111. Figure 3 A magnified view of a portion (i.e.) Figure 4As can be seen, this embodiment preferably provides two first sealing elements 161, which are arranged side by side axially within the mounting groove 111. The first sealing element 161 located on the inner ring can achieve a seal in the horizontal direction, while the first sealing element 161 located on the outer ring can achieve a seal in both the horizontal and circumferential directions. This sealing design ensures that even if one of the first sealing elements 161 ages or is damaged after long-term use, the second first sealing element 161 can still guarantee the sealing performance of the valve seat 15, greatly improving the service life and reliability of the valve under high-pressure environments. The embedded mounting also provides precise positioning for the valve seat 15, ensuring the alignment of the valve plate 22 and the valve seat 15, which is beneficial for forming a reliable seal.

[0111] Reference Figure 3 , Figure 5 As shown, valve structure 1 also includes a gland 14. The gland 14 is fixedly installed inside the bracket 13 and bolted into the valve cover 12. The valve stem 2, valve cover 12, and gland 14 together form a mounting cavity 103, within which a second sealing element 162, such as a main seal, is installed for primary sealing of the valve stem 2. Exemplarily, in this embodiment, one second sealing element 162 is provided for sealing the valve stem 2. Furthermore, a third sealing element 163 is provided at the mating surface between the valve cover 12 and the gland 14 to prevent leakage of the medium from the gap between them; a fourth sealing element 164, such as an auxiliary seal, is also provided at the mating surface between the gland 14 and the valve stem 2 to form a further auxiliary seal. This multi-layer sealing structure provides reliable sealing for the long-term reciprocating motion of the valve stem 2, and is particularly suitable for high-pressure environments.

[0112] To ensure a sliding seal between the piston rod 32 and the housing 31, refer to... Figure 6 As shown, a fifth seal 30 is provided between the piston rod 32 and the housing 31. The fifth seal 30 can be one, two, or three, etc., and the type of the fifth seal 30 can be a sealing ring, a sealing piston, or a combination of a sealing ring and a sealing piston, etc.

[0113] Optional, refer to Figure 3 As shown, the drive unit 3 also includes a relief valve 34 disposed on the housing 31 and connected to the piston cylinder 311, for releasing residual pressure during maintenance; the drive unit 3 also includes a hydraulic flushing port 35 disposed on the housing 31 and connected to the piston cylinder 311, for purging air or flushing the system during commissioning; the drive unit 3 also includes a balancer 36 disposed on the housing 31 and connected to the piston cylinder 311, the balancer 36 being connected to the part of the piston cylinder 311 away from the hydraulic interface 4, for compensating for the volume change of the cavity when the piston rod 32 moves, and balancing the internal and external pressures, which is particularly important for the deep-sea environment.

[0114] To achieve automatic valve reset, refer to Figure 3 As shown, the drive device 3 in this embodiment also includes a reset element 33 disposed within the housing 31. This reset element 33 can be a reset spring. The reset spring is sleeved on the piston rod 32 and always applies a reset force that causes the piston rod 32 to move upward, i.e., away from the valve structure 1. When pressure is supplied to the hydraulic interface 4, the pressure overcomes the spring force and pushes the piston rod 32 downward to open the valve; when the pressure is released, the spring force drives the piston rod 32 upward to reset and close the valve. This spring-reset structure can automatically reset the valve to a safe position when the hydraulic power source is accidentally lost. It is simple in structure and safe and reliable.

[0115] Reference Figure 3 As shown, the mechanism includes a top flange 61, a drive rod 62, and a drive nut 63. The top flange 61 is bolted to the top of the housing 31 of the drive unit 3. The drive rod 62 is connected to an emergency drive interface 5 at the top, which allows the ROV tool to rotate when connected to the emergency drive interface 5. The drive rod 62 is rotatably supported on the top flange 61 by a thrust bearing, allowing it to rotate freely without axial movement. The drive nut 63 is fitted over the drive rod 62, and the two are connected by a threaded connection. The lower end face of the drive nut 63 abuts against the upper end face of the piston rod 32.

[0116] To ensure that the drive nut 63 only moves axially when the drive rod 62 rotates, a circumferential limiting structure is provided between the drive nut 63 and the top flange 61. Specifically, a limiting block extending axially can be provided on the outer periphery of the drive nut 63, while a limiting groove that slides with the limiting block is opened on the inner wall of the top flange 61; or conversely, a limiting block can be provided on the top flange 61, and a limiting groove can be opened on the drive nut 63. When the drive rod 62 rotates, the drive nut 63 cannot rotate because it is constrained by the limiting structure, and therefore can only move linearly along the axial direction of the drive rod 62, thereby pushing the piston rod 32 that abuts against it to move linearly. This transmission method of lead screw and nut with circumferential limiting has the characteristics of compact structure, high transmission efficiency, and smooth movement compared with traditional gear rack or linkage mechanisms, and is especially suitable for transmitting large axial forces in the space-constrained deep-sea drive device 3.

[0117] To further improve the smoothness of the rotation of the drive rod 62 and withstand the enormous axial force during emergency operations, the drive rod 62 is supported by a thrust bearing structure. Specifically, refer to... Figure 3As shown, the motion conversion mechanism 6 also includes an upper cover 64 and a thrust bearing structure. The upper cover 64 is mounted on the end of the top flange 61 away from the valve structure 1. The thrust bearing structure includes a first thrust bearing 65 and a second thrust bearing 66 sleeved on the drive rod 62. The first thrust bearing 65 is located between the shoulder of the drive rod 62 and the top flange 61, and the second thrust bearing 66 is located between the drive rod 62 and the upper cover 64. The two thrust bearings respectively bear the upward and downward axial thrust generated when the drive rod 62 rotates, converting sliding friction into rolling friction, which greatly reduces the operating torque. With the use of thrust bearings, the torque required for ROV tools to operate in the deep sea can be significantly reduced, which is beneficial to improving the smoothness of operation under the high pressure of the deep sea.

[0118] To prevent seawater from entering the interior through the connection between the drive rod 62 and the upper cover 64, refer to... Figure 7 As shown, at least one sixth seal 60 is provided between the drive rod 62 and the emergency drive interface 5. This sixth seal 60 can be one, two, or three, and its type can be a sealing ring, a sealing piston, or a combination of a sealing ring and a sealing piston. This sixth seal 60 effectively isolates external seawater while ensuring the rotation of the drive rod 62, preventing corrosion of internal metal components.

[0119] To visually display the valve's open / closed status externally, this embodiment incorporates a purely mechanical position indicator mechanism 7. (Refer to...) Figure 3 , Figures 8-10 As shown, the mechanism includes an upper support 71, an indicator drive rod 72, a pin 721, an indicator rod 73, and a pointer 74.

[0120] The upper support 71 is sleeved on the outside of the piston rod 32 and fixedly connected to the piston rod 32, thus it rises and falls synchronously with the piston rod 32. The indicator drive rod 72 is fixed on the upper support 71 and extends upward. The top flange 61 is provided with a guide groove 611 extending axially, and a pin 721 is fixed on the indicator drive rod 72, one end of which is slidably embedded in the guide groove 611. Guided by the guide groove 611, the indicator drive rod 72 can only move up and down and cannot rotate.

[0121] The indicator rod 73 is rotatably sleeved on the outside of the indicator drive rod 72, and a spiral groove 731 is formed on the cylindrical wall of the indicator rod 73. The other end of the pin 721 passes through the indicator drive rod 72 and extends into the spiral groove 731. When the indicator drive rod 72 rises and falls with the piston rod 32, the fixed pin 721 moves along the spiral groove 731 on the indicator rod 73. Due to the guiding effect of the spiral groove 731, the movement of the pin 721 forces the indicator rod 73 to rotate. In this way, the linear motion of the piston rod 32 is converted into the rotational motion of the indicator rod 73 through the cooperation of the pin 721-spiral groove 731 mechanism.

[0122] The pointer 74 is fixed to the top of the indicator rod 73. An indicator groove 51 is provided on the side wall of the emergency drive interface 5, and the end of the pointer 74 is located within this groove 51, allowing the operator to directly observe the direction of the pointer 74 through the groove 51. The two ends of the indicator groove 51 are marked with an "open" indicator 52 and a "closed" indicator 53, such as "OPEN" and "CLOSE." When the valve is open, the piston rod 32 descends, causing the pointer 74 to rotate and point to the "open" indicator 52 via the aforementioned transmission mechanism; when the valve is closed, the pointer 74 rotates in the opposite direction to point to the "closed" indicator 53. This indicator mechanism is completely independent of the hydraulic and electrical systems, using purely mechanical transmission. It operates reliably even in the dark environment of the deep sea. Operators can immediately read the valve status through the same viewing window before and after operating the ROV tool, without the need for additional observation equipment or lighting.

[0123] It should be noted that the structures and working principles of the ROV tools and other components not described in detail in this application can all adopt existing solutions in the prior art, which can be understood and accepted by those skilled in the art, and therefore will not be elaborated further.

[0124] In the description of the embodiments of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0125] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0126] In the description of the embodiments of the present invention, it should also be noted that the terms "first", "second", etc. used herein do not specifically refer to any order or sequence, nor are they intended to limit the present case; they are merely used to distinguish components or operations described using the same technical terms.

[0127] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0128] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A valve, characterized in that, The valve includes: A valve structure (1) has a fluid channel (101) and a valve chamber (102) therein. The fluid channel (101) extends along a first direction, and the valve chamber (102) extends along a second direction and is connected to the fluid channel (101). The valve stem (2) is movably disposed within the valve chamber (102) and is used to control the opening and closing of the fluid passage (101); The driving device (3) includes a housing (31) and a piston rod (32). A piston cylinder (311) is formed inside the housing (31). The piston rod (32) is movably disposed in the piston cylinder (311). The piston cylinder (311) is connected to the valve chamber (102). The piston rod (32) is linked to the valve rod (2) and is used to drive the valve rod (2) to move. A hydraulic interface (4) is provided on the valve structure (1) and / or housing (31) for introducing pressurized medium; An emergency drive interface (5) is installed in conjunction with the drive device (3) to introduce driving force; A motion conversion mechanism (6) is disposed between the emergency drive interface (5) and the piston rod (32) for converting the driving force input from the emergency drive interface (5) into a force that drives the piston rod (32) to perform linear motion. The pressurized medium introduced by the hydraulic interface (4) and the driving force introduced by the emergency drive interface (5) act independently on the piston to realize the opening or closing of the valve.

2. The valve according to claim 1, characterized in that, The valve structure (1) includes a valve body (11), a valve cover (12), and a bracket (13) that are fixedly installed in sequence along the second direction. The fluid channel (101) is disposed in the valve body (11). The valve cavity (102) passes through the valve body (11), the valve cover (12), and the bracket (13). A sealing ring is provided between the valve cover (12) and the valve body (11). The drive device (3) is fixedly installed with the bracket (13).

3. The valve according to claim 2, characterized in that, When the fluid passage (101) is unobstructed, the piston rod (32) abuts against the bracket (13); when the fluid passage (101) is open, the valve rod (2) abuts against the valve cover (12).

4. The valve according to claim 2, characterized in that, The valve stem (2) includes a rod body (21) that passes through the valve cavity (102) and is connected to the piston rod (32) and a valve plate (22) that passes through the fluid channel (101). The valve plate (22) has a through hole (221). When the fluid channel (101) is unobstructed, at least part of the orthographic projection of the through hole (221) is within the range of the orthographic projection of the fluid channel (101). When the fluid channel (101) is disconnected, the orthographic projection of the through hole (221) is outside the range of the orthographic projection of the fluid channel (101).

5. The valve according to claim 2, characterized in that, The valve body (11) is provided with an installation groove (111) located in the fluid channel (101). The valve structure (1) also includes a valve seat (15) disposed between the valve stem (2) and the valve body (11). The valve seat (15) is located in the installation groove (111). At least one first seal (161) is provided between the valve seat (15) and the installation groove (111).

6. The valve according to claim 2, characterized in that, The valve structure (1) further includes a pressure cap (14), which is fixedly installed in the bracket (13) and partially extends into the valve cover (12). The valve stem (2), the valve cover (12) and the pressure cap (14) enclose an installation cavity (103). A second sealing element (162) is installed in the installation cavity (103). A third sealing element (163) is provided between the valve cover (12) and the pressure cap (14). A fourth sealing element (164) is provided between the pressure cap (14) and the valve stem (2).

7. The valve according to claim 1, characterized in that, At least one fifth seal (30) is provided between the piston rod (32) and the housing (31); and / or, The drive unit (3) further includes a relief valve (34) and / or a hydraulic flushing port (35) and / or a balancer (36) disposed on the housing (31) and connected to the piston cylinder (311); and / or, The drive device (3) further includes a reset member (33) disposed in the housing (31), the reset member (33) causing the piston rod (32) to tend to move away from the valve structure (1).

8. The valve according to claim 1, characterized in that, The motion conversion mechanism (6) includes: The top flange (61) is fixedly installed on the end of the drive device (3) away from the valve structure (1); The drive rod (62) is connected to the emergency drive interface (5) and is capable of rotating relative to the top flange (61); The drive nut (63) is threadedly connected to the drive rod (62) and abuts against the piston rod (32). One of the drive nut (63) and the top flange (61) is provided with a limiting groove, and the other is provided with a limiting block that cooperates with the limiting groove, so that the drive nut (63) slides along the piston rod (32) axially when the drive rod (62) rotates.

9. The valve according to claim 8, characterized in that, The motion conversion mechanism (6) also includes: The top cover (64) is installed on the end of the top flange (61) away from the valve structure (1); The first thrust bearing (65) and the second thrust bearing (66) are sleeved on the drive rod (62). The first thrust bearing (65) abuts against the top flange (61) and the drive rod (62) respectively, and the second thrust bearing (66) abuts against the drive rod (62) and the top cover (64) respectively.

10. The valve according to claim 9, characterized in that, At least one sixth seal (60) is provided between the drive rod (62) and the top cover (64).

11. The valve according to claim 8, characterized in that, The valve further includes a position indicating mechanism (7), the position indicating mechanism (7) comprising: The upper support (71) is sleeved on the outside of the piston rod (32) and fixedly connected to the piston rod (32); An indicator drive rod (72) is fixed on the upper support (71). A pin (721) is provided on the indicator drive rod (72). A guide groove (611) is provided on the top flange (61). The pin (721) is slidably embedded in the guide groove (611). An indicator rod (73) is rotatably sleeved outside the indicator drive rod (72). The indicator rod (73) is provided with a spiral groove (731). The pin (721) extends into the spiral groove (731). The sliding of the indicator drive rod (72) can be converted into the rotation of the indicator rod (73) through the spiral groove (731). A pointer (74) is fixed to the end of the indicator rod (73). An indicator groove (51) is provided on the emergency drive interface (5). The pointer (74) is movably disposed in the indicator groove (51). An open indicator mark (52) and an closed indicator mark (53) are respectively provided at both ends of the indicator groove (51).

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