Deep sea rapid barrier valve and method of use

Abstract

The application provides a deep-sea rapid blocking valve and a use method. The rapid blocking valve comprises a valve body, a valve cover and a valve rod. The valve body is internally provided with a valve cavity. The valve cover is connected with one side of the valve body to form a closed space. A flow channel is arranged in the valve cavity. A one-way valve structure and a two-way valve structure are arranged along the flow channel. The inner side end of the valve rod extends into the valve cavity and is connected with the one-way valve and the two-way valve in linkage. The one-way valve and the two-way valve are both provided with sealing structures between the valve body and the inner wall of the valve body. The L-shaped integrated valve body type is arranged in a side-mounted structure. The two-way ball valve is integrated in the interior. The structure is compact, light in weight, small in size, reduces the external leakage points of the valve, is convenient to install, improves the pressure-bearing capacity and the sealing capacity.

Description

Technical Field

[0001] This invention belongs to the technical field of sea valves, and particularly relates to a deep-sea rapid isolation valve and its usage method. Background Technology

[0002] To enhance the safety of the sea passage on the side of the ship, a side valve is typically installed at the pressure vessel, followed by a second valve with a double-locking design. While this double-locking design improves safety, it also increases size and weight. Due to space constraints near the sea passage, the side valve and the second valve often cannot be directly connected and must be connected via a flange, adding a potential leakage point between the first and second valves in the sea passage. When the back pressure in the sea passage increases and it ruptures, seawater will rapidly flood the compartment. The corresponding side passage must be quickly closed to minimize flooding, placing higher demands on response time. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a deep-sea rapid barrier valve and its usage method, which adopts an integrated valve body structure and integrates two valve cores to form a primary valve and a secondary valve, thereby achieving a miniaturized and lightweight design of the valve components.

[0004] The embodiments of this application are implemented as follows: This application provides a deep-sea rapid barrier valve, characterized in that it includes a valve body, a valve cover, and a valve stem. The valve body has a valve cavity, and the valve cover is connected to one side of the valve body to form a sealed space. The valve cavity has a flow channel, and a first valve structure and a second valve structure are provided along the flow channel. The inner end of the valve stem extends into the valve cavity and is linked to the first valve and the second valve. Both the first valve and the second valve have a sealing structure between them and the inner wall of the valve body.

[0005] In some optional implementations, the valve body is an L-shaped integrated structure, the flow channel is an L-shaped flow channel, and a first valve and a second valve are respectively provided in the vertical section and horizontal section of the L-shaped flow channel. The valve stem includes a first-stage valve stem and a second-stage valve stem, and the outer ends of the first-stage valve stem and the second-stage valve stem are respectively connected to a first-stage actuator and a second-stage actuator. Both the first-stage actuator and the second-stage actuator are connected to the valve body.

[0006] In some optional embodiments, the valve includes a primary valve core, which is a spherical structure with a central straight channel. A primary valve seat and a secondary valve seat are embedded on the inner walls of the valve body corresponding to the upper and lower ends of the primary valve core. The primary valve seat and the secondary valve seat abut against the primary valve core to form a sealing pair. A primary sealing structure and a secondary sealing structure are respectively provided between the primary valve seat and the secondary valve seat and the valve body. A valve seat pressure sleeve is provided on the inner wall of the valve body corresponding to the top of the secondary valve seat. A fixing ring is provided on the top of the valve seat pressure sleeve. The fixing ring is engaged and positioned with the inner wall of the valve body through a stepped surface.

[0007] In some alternative implementations, the two-way valve includes a secondary valve core, which is an eccentric spherical structure with an arc-shaped channel. The valve body has a tertiary valve seat at the outer end corresponding to the secondary valve core. The tertiary valve seat abuts against the secondary valve core to form a sealing pair. A tertiary sealing structure is provided between the inner wall of the valve body and the secondary valve core.

[0008] In some alternative implementations, a first support plate and a second support plate are embedded in the inner wall of the valve body corresponding to the positions of the primary valve core and the secondary valve core.

[0009] In some alternative embodiments, the primary sealing structure includes a first O-ring and a first retaining ring fitted between the primary valve seat and the inner wall of the valve body, a first elastic element, and a first sealing ring fitted between the primary valve seat and the primary valve core.

[0010] In some optional embodiments, the secondary sealing structure includes a second sealing ring fitted between the secondary valve seat and the primary valve core, a second O-ring and a second retaining ring fitted between the valve seat sleeve and the inner wall of the valve body, and a third O-ring, a third retaining ring, and a second elastic element fitted between the valve seat sleeve and the secondary valve seat.

[0011] In some optional embodiments, the three-stage sealing structure includes a fourth O-ring and a fourth retaining ring fitted between the three-stage valve seat and the inner wall of the valve body, a third elastic element, and a third sealing ring fitted between the three-stage valve seat and the two-stage valve core.

[0012] In some optional embodiments, a stuffing box is provided between the primary valve stem and the secondary valve stem and the inner wall of the valve body. A stuffing O-ring and a stuffing retainer are respectively provided between the stuffing box and the valve body and the corresponding valve stem. A spiral wound gasket is also provided between the stuffing box and the valve body. A primary limit block and a secondary limit block are respectively provided between the primary valve stem and the secondary valve stem and the corresponding primary actuator and the secondary actuator.

[0013] A method for using a deep-sea rapid barrier valve, characterized by comprising the following: Valve opening process: The first-stage actuator drives the first-stage valve core to rotate through the first-stage valve stem until the first valve opens. The second-stage actuator drives the second-stage valve core to rotate through the second-stage valve stem, and the second valve opens. At this time, the quick-blocking valve is fully open, and the medium enters the valve body and flows along the L-shaped flow channel. The pressure between the valve seat and the valve core increases with the increase of the medium pressure, keeping the valve core in a compressed and sealed state, thus achieving self-sealing of the valve seat. Valve closing process: The first-stage actuator drives the first-stage valve core to rotate through the first-stage valve stem until the first valve is closed. The second-stage actuator drives the second-stage valve core to rotate through the second-stage valve stem, and the second valve is closed. At this time, the quick-blocking valve is fully closed.

[0014] The beneficial effects of this application are as follows: This application provides a deep-sea rapid isolation valve and its usage method, which is suitable for sea-access pipelines on the side of the ship. It integrates the dual-locking function of the side valve lockout and the second valve lockout, reduces intermediate connecting flanges, adopts an integrated pressure-bearing design, and has the characteristics of miniaturization and lightweight. At the same time, it can be configured with hydraulic actuators and manual actuators as needed, and has the function of remote control rapid shutdown, saving overall resources and improving the ability to handle pipeline damage. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front sectional view of an embodiment of this application; Figure 2 This is a side sectional view of an embodiment of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0019] It should be understood that the sequence number of each step in the embodiment does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0020] 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.

[0021] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not 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 this application. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "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 mechanical connection or an electrical 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 this application based on the specific circumstances.

[0024] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0025] like Figure 1As shown, this embodiment discloses a deep-sea rapid barrier valve, including a valve body 1, a valve cover 2, and a valve stem. The valve body has a valve cavity. The valve cover is connected to one side of the valve body to form a sealed space. The valve cavity has a flow channel. A first valve structure and a second valve structure are provided along the flow channel. The inner end of the valve stem extends into the valve cavity and is linked to the first valve and the second valve. A sealing structure is provided between the first valve and the second valve and the inner wall of the valve body.

[0026] The valve body has an L-shaped integrated structure and an L-shaped flow channel. A first valve and a second valve are respectively provided in the vertical and horizontal sections of the L-shaped flow channel. The valve stem includes a first-stage valve stem 3 and a second-stage valve stem 4. The outer ends of the first-stage valve stem and the second-stage valve stem are respectively connected to the first-stage actuator 5 and the second-stage actuator 6. Both the first-stage actuator and the second-stage actuator are connected to the valve body.

[0027] A valve includes a primary valve core 7, which is a spherical structure with a central straight channel. A primary valve seat 8 and a secondary valve seat 9 are embedded on the inner walls of the valve body corresponding to the upper and lower ends of the primary valve core. The primary valve seat and the secondary valve seat abut against the primary valve core to form a sealing pair. A primary sealing structure and a secondary sealing structure are respectively provided between the primary valve seat and the secondary valve seat and the valve body. A valve seat pressure sleeve is provided on the inner wall of the valve body corresponding to the top of the secondary valve seat. A fixing ring is provided on the top of the valve seat pressure sleeve. The fixing ring is engaged and positioned with the inner wall of the valve body through a stepped surface.

[0028] The two-way valve includes a secondary valve core 10, which is an eccentric spherical structure with an arc-shaped channel. A tertiary valve seat 11 is located on the outer end of the valve body corresponding to the secondary valve core. The tertiary valve seat abuts against the secondary valve core to form a sealing pair. A tertiary sealing structure is provided between the inner wall of the valve body and the secondary valve core. The arc-shaped channel adopts a large bend angle and eccentric structure design to increase the turning radius, reduce local pressure loss at the bend, and lower fluid resistance.

[0029] Furthermore, a first support plate 12 and a second support plate 13 are embedded in the inner wall of the valve body at positions corresponding to the primary valve core and the secondary valve core, which strengthens the support for the primary valve core and the secondary valve core and helps to reduce the opening and closing torque.

[0030] Furthermore, the primary sealing structure includes a first O-ring 14 and a first retaining ring 15 that are fitted between the primary valve seat and the inner wall of the valve body, a first elastic element 16, and a first sealing ring 17 that is fitted between the primary valve seat and the primary valve core.

[0031] The secondary sealing structure includes a second sealing ring 18 that fits between the secondary valve seat and the primary valve core, a second O-ring 19 and a second retaining ring 20 that fits between the valve seat sleeve and the inner wall of the valve body, and a third O-ring 21, a third retaining ring 22, and a second elastic element that fit between the valve seat sleeve and the secondary valve seat.

[0032] The three-stage sealing structure includes a fourth O-ring 23 and a fourth retaining ring 24 that are fitted between the third-stage valve seat and the inner wall of the valve body, a third elastic element, and a third sealing ring 25 that is fitted between the third-stage valve seat and the second-stage valve core.

[0033] Furthermore, a stuffing box 26 is fitted between the primary valve stem and the secondary valve stem and the inner wall of the valve body. A stuffing O-ring 27 and a stuffing retainer 28 are respectively provided between the stuffing box and the valve body and the corresponding valve stem. A spiral wound gasket 29 is also provided between the stuffing box and the valve body. A primary limit block 30 and a secondary limit block 31 are respectively provided between the primary valve stem and the secondary valve stem and the corresponding primary actuator and secondary actuator, so as to realize the mechanical limit function of the quick-blocking valve and ensure the stable and reliable position of the valve.

[0034] When the quick-closing valve is fully open, it has a closed flow channel structure. After the medium enters the valve, it flows along the closed flow channel, which improves the valve's flowability, effectively reduces flow resistance, and reduces the deposition of seawater impurities.

[0035] The first and second valves of the quick-closing valve operate independently of each other, with no contact between them. Damage to either valve does not affect the normal use of the other valve, ensuring the reliability of the valve's double-locking function.

[0036] Example 1 The quick-blocking valve adopts a two-valve structure. Both valves use a fixed seat soft seal structure. One valve adopts a one-way double seat seal structure, that is, when the medium flows in the forward direction (from the side flange to the pipeline flange), the front sealing ring is a forward seal and the rear sealing ring is a reverse seal. The second valve adopts a single seat bidirectional seal, that is, when the medium flows in both the forward and reverse directions, the valve seat sealing ring can achieve medium sealing.

[0037] Since the forward direction (from the side flange to the pipeline flange) of the quick-blocking valve is the pressure direction under normal operating conditions, while the reverse direction (from the pipeline flange to the side flange) is only under pressure during the tightness test and is not a common operating condition, a three-seal structure in the forward direction and a one-seal structure in the reverse direction are adopted to ensure sealing reliability.

[0038] The quick-blocking valve adopts a self-sealing design where the valve seat and valve core tighten with pressure. That is, the thrust generated by the medium pressure always pushes the valve seat towards the ball. The pressure between the valve seat and valve core increases with the increase of the medium pressure, keeping the valve core in a compressed sealing state at all times, realizing the self-sealing of the valve seat and improving sealing safety.

[0039] Furthermore, each seal employs a combination of sealing rings, O-rings, and retaining rings to ensure long-term sealing performance suitable for seawater media. The sealing rings are made of new PEEK material, meeting the long-term PN160 sealing performance requirements. The O-rings are made of fluororubber, and the retaining rings are made of PTFE. Fluororubber, PTFE, and PEEK all possess advantages such as corrosion resistance and aging resistance. The packing uses a combination of flexible graphite and braided graphite to ensure reliable sealing and fire resistance. The spiral wound gasket uses TA2 flexible graphite material with clips, ensuring sealing reliability, fire resistance, and compatibility with the titanium alloy base material.

[0040] The quick-closing valve is used in the sea access pipeline on the side of the ship and has a pressure resistance capacity of PN160 pressure rating.

[0041] Example 2 Furthermore, the dual-channel valve operates independently, features a low-torque design, and has a self-locking function. It can be configured with hydraulic actuators and manual actuators as needed, enabling remote and rapid closure, or manual operation at the valve's location, thus improving valve reliability.

[0042] Under normal operating conditions, the hydraulic actuator is supplied with oil by the ship's entire hydraulic system. The hydraulic oil is switched via a directional valve on the hydraulic system pipeline, changing the direction of movement of the actuator's cylinder and driving the valve core to rotate clockwise or counterclockwise, thus enabling remote control of the quick-closing valve's opening and closing function. In this mode, the quick-closing valve's rapid closing time is no more than 5 seconds. When the ship's entire hydraulic system fails, the hydraulic actuator has its own manual hydraulic pump. By operating this manual pump, the direction of movement of the actuator's cylinder is changed, driving the valve core to rotate clockwise or counterclockwise, thus enabling the quick-closing valve's opening and closing function. The hydraulic actuator has a local mechanical valve position indicator and an interface for feedback of the valve's open / closed position. Information on the quick-closing valve core's open / closed position can be uploaded through this interface. The hydraulic actuator has a hydraulic locking structure, utilizing an integrated hydraulic check valve to maintain the valve in the open / closed position, reducing valve core disturbance under media impact.

[0043] The manual actuator features a local mechanical valve position indication function and an interface for feedback of open / closed position signals. Information regarding the opening / closing position of the quick-closing valve spool can be uploaded via this interface. The manual actuator incorporates a worm gear mechanical locking structure, enabling the valve to self-lock in the open / closed position and reducing spool disturbance under media impact.

Claims

1. A deep-sea rapid isolation valve, characterized in that, The valve includes a valve body, a valve cover, and a valve stem. The valve body has a valve cavity. The valve cover is connected to one side of the valve body to form a sealed space. The valve cavity has a flow channel. A first valve structure and a second valve structure are provided along the flow channel. The inner end of the valve stem extends into the valve cavity and is linked to the first and second valves. Both the first and second valves have a sealing structure between them and the inner wall of the valve body.

2. The deep-sea rapid barrier valve according to claim 1, characterized in that, The valve body is an L-shaped integrated structure, and the flow channel is an L-shaped flow channel. The vertical section and horizontal section within the L-shaped flow channel are respectively provided with a first valve and a second valve. The valve stem includes a first-stage valve stem and a second-stage valve stem. The outer ends of the first-stage valve stem and the second-stage valve stem are respectively connected to a first-stage actuator and a second-stage actuator. Both the first-stage actuator and the second-stage actuator are connected to the valve body.

3. A deep-sea rapid barrier valve according to claim 2, characterized in that, The valve includes a primary valve core, which is a spherical structure with a central straight channel. A primary valve seat and a secondary valve seat are embedded on the inner walls of the valve body corresponding to the upper and lower ends of the primary valve core. The primary valve seat and the secondary valve seat abut against the primary valve core to form a sealing pair. A primary sealing structure and a secondary sealing structure are respectively provided between the primary valve seat and the secondary valve seat and the valve body. A valve seat pressure sleeve is provided on the inner wall of the valve body corresponding to the top of the secondary valve seat. A fixing ring is provided on the top of the valve seat pressure sleeve. The fixing ring is engaged and positioned with the inner wall of the valve body through a stepped surface.

4. A deep-sea rapid barrier valve according to claim 3, characterized in that, The two-stage valve includes a two-stage valve core, which is an eccentric spherical structure with an arc-shaped channel. The valve body has a three-stage valve seat at the outer end corresponding to the two-stage valve core. The three-stage valve seat abuts against the two-stage valve core to form a sealing pair. A three-stage sealing structure is provided between the inner wall of the valve body and the two-stage valve core.

5. A deep-sea rapid isolation valve according to claim 4, characterized in that, The inner wall of the valve body is fitted with a first support plate and a second support plate at positions corresponding to the primary valve core and the secondary valve core.

6. A deep-sea rapid barrier valve according to claim 3 or 5, characterized in that, The primary sealing structure includes a first O-ring and a first retaining ring fitted between the primary valve seat and the inner wall of the valve body, a first elastic element, and a first sealing ring fitted between the primary valve seat and the primary valve core.

7. A deep-sea rapid barrier valve according to claim 6, characterized in that, The secondary sealing structure includes a second sealing ring fitted between the secondary valve seat and the primary valve core, a second O-ring and a second retaining ring fitted between the valve seat sleeve and the inner wall of the valve body, and a third O-ring, a third retaining ring, and a second elastic element fitted between the valve seat sleeve and the secondary valve seat.

8. A deep-sea rapid barrier valve according to claim 4 or 5, characterized in that, The three-stage sealing structure includes a fourth O-ring and a fourth retaining ring fitted between the three-stage valve seat and the inner wall of the valve body, a third elastic element, and a third sealing ring fitted between the three-stage valve seat and the two-stage valve core.

9. A deep-sea rapid barrier valve according to claim 2 or 5, characterized in that, A stuffing box is provided between the primary valve stem and the secondary valve stem and the inner wall of the valve body. A stuffing O-ring and a stuffing retainer are respectively provided between the stuffing box and the valve body and the corresponding valve stem. A spiral wound gasket is also provided between the stuffing box and the valve body. A primary limit block and a secondary limit block are respectively provided between the primary valve stem and the secondary valve stem and the corresponding primary actuator and the secondary actuator.

10. A method of using the deep-sea rapid barrier valve as described in claim 8, characterized in that, Includes the following: Valve opening process: The first-stage actuator drives the first-stage valve core to rotate through the first-stage valve stem until the first valve opens. The second-stage actuator drives the second-stage valve core to rotate through the second-stage valve stem, and the second valve opens. At this time, the quick-blocking valve is fully open, and the medium enters the valve body and flows along the L-shaped flow channel. The pressure between the valve seat and the valve core increases with the increase of the medium pressure, keeping the valve core in a compressed and sealed state, thus achieving self-sealing of the valve seat. Valve closing process: The first-stage actuator drives the first-stage valve core to rotate through the first-stage valve stem until the first valve is closed. The second-stage actuator drives the second-stage valve core to rotate through the second-stage valve stem, and the second valve is closed. At this time, the quick-blocking valve is fully closed.

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