Remote emergency cut-off double-valve redundancy combustible ice mining safety valve

Abstract

The invention provides a remote emergency cut-off double-valve redundancy combustible ice mining safety valve, and belongs to the technical field of valves, the remote emergency cut-off double-valve redundancy combustible ice mining safety valve comprises a valve body, a valve cover, a valve rod and an execution box, the execution box comprises a remote control module, an inlet flow channel, an outlet flow channel and a valve seat opening are formed in the valve body, the valve seat opening is provided with an upper valve seat and a lower valve seat, and the valve rod comprises an upper valve rod body and a lower valve rod body; an upper valve element is arranged on the upper valve rod, a lower valve element is arranged on the lower valve rod, the lower valve rod synchronously moves along with the upper valve rod, a lead screw section is arranged on the lower valve rod, a connecting sleeve is arranged on the lower valve element and matched with the lead screw section in a spiral mode, a base is arranged at the bottom of the valve body, an inner channel and an outer channel are arranged on the base, and a guide column is arranged on the lower valve element. According to the emergency cut-off valve, the double-valve redundancy design of the upper valve seat and the lower valve seat is matched with the step-by-step sealing action of the upper valve element and the lower valve element, the reliability of emergency cut-off is greatly improved, and the leakage risk caused by the fault of a single valve element is avoided.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically to a dual-valve redundant safety valve for remote emergency shut-off in combustible ice mining. Background Technology

[0002] Methane hydrate extraction often takes place in deep-sea, high-pressure, and low-temperature environments. The medium in the extraction pipeline is a flammable and explosive mixture of methane gas and liquid. Remote emergency shut-off safety valves are core equipment to prevent media leakage and avoid the escalation of accidents. Their core function is to quickly cut off the flow path through remote control in case of pipeline overpressure, leakage, or other emergency conditions, ensuring the safety of extraction operations. They are widely used in wellheads and pipeline systems for deep-sea methane hydrate extraction.

[0003] Traditional safety valves are mostly single-valve structures, lacking redundancy design. Once the valve core seal fails or gets stuck, it cannot effectively shut off, reducing the reliability of the safety valve and making it difficult to adapt to the harsh working conditions of combustible ice mining. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a dual-valve redundant safety valve for remote emergency shut-off in combustible ice mining.

[0005] The technical solution adopted by this invention is as follows: This application provides a remote emergency shut-off dual-valve redundant safety valve for combustible ice mining, including a valve body, a valve cover, a valve stem, and an actuator box. The actuator box is used to drive the valve stem to rise and fall and includes a remote control module. The valve body is provided with an inlet flow channel and an outlet flow channel, and a valve seat port is provided between the inlet flow channel and the outlet flow channel. The valve seat port is provided with an upper valve seat and a lower valve seat. The valve stem includes an upper valve stem and a lower valve stem. An upper valve core is provided on the upper valve stem, and a lower valve core is provided on the lower valve stem. The lower valve stem moves synchronously with the upper valve stem and is provided with a lead screw section. The lower valve core is provided with a connecting sleeve that screws into the lead screw section. The bottom of the valve body is provided with a base. The base is provided with an inner channel that slides into the lower valve stem and several outer channels. The lower valve core is provided with a guide post corresponding to the outer channel. A first elastic element is provided between the lower valve core and the base. When the upper valve stem descends, the upper valve core descends and forms a seal with the upper valve seat. When the lower valve stem descends, the lower valve core moves upward through the screw engagement of the connecting sleeve and the lead screw section. When the connecting sleeve disengages from the lead screw section, the lower valve core forms a seal with the lower valve seat under the action of the first elastic element.

[0006] In some embodiments, the lower end face of the upper valve seat is provided with an upper magnetic ring, and the upper end face of the lower valve seat is provided with a lower magnetic ring corresponding to the upper magnetic ring.

[0007] In some embodiments, an upper coil assembly is provided inside the execution box, and the upper valve stem includes an upper iron core portion that cooperates with the upper coil assembly. A linkage shaft is provided on the upper valve stem, and a first rocker arm and a second rocker arm are hinged on the linkage shaft. The other end of the first rocker arm is hinged to the execution box, and a channel is opened at one end of the second rocker arm. A rocker shaft is hinged inside the execution box, and one end of the rocker shaft extends into the channel. A second elastic element is provided between the rocker shaft and the second rocker arm.

[0008] In some embodiments, the base is provided with a lower cavity, and a lower coil assembly is provided in the lower cavity. The lower valve stem includes a lower iron core portion that cooperates with the lower coil assembly. The upper coil assembly and the lower coil assembly simultaneously drive the valve stem to move, or the upper coil assembly drives the valve stem to move, or the lower coil assembly drives the valve stem to move.

[0009] In some embodiments, a filter cartridge is disposed on the base facing the lower valve seat.

[0010] In some embodiments, a scraper plate is provided on the outer periphery of the lower valve core, and the scraper plate moves with the lower valve core to scrape away debris from the inner wall of the filter cartridge.

[0011] In some embodiments, a bellows is provided between the base and the lower valve core, and the bellows covers the outside of the guide post.

[0012] The beneficial effects of this invention are as follows: The invention utilizes a dual-valve redundancy design with an upper valve seat and a lower valve seat, along with the step-by-step sealing action of the upper and lower valve cores, to significantly improve the reliability of emergency shut-off and avoid the risk of leakage caused by a single valve core failure; the remote control module and multi-coil drive method are adapted to the needs of deep-sea remote operations; the combination of the filter cartridge and scraper plate can prevent impurities from affecting the seal; the overall structure is adapted to the harsh working conditions of combustible ice mining, and safety and practicality are significantly improved. Attached Figure Description

[0013] 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 of the present invention. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of the present invention.

[0014] Figure 1 This is a schematic diagram of a remote emergency shut-off dual-valve redundant safety valve for combustible ice mining according to the present invention. Figure 2 This is a partial schematic diagram of a remote emergency shut-off dual-valve redundant safety valve for combustible ice mining according to the present invention. Figure 1 ; Figure 3This is a partial schematic diagram of a remote emergency shut-off dual-valve redundant safety valve for combustible ice mining according to the present invention. Figure 2 ; In the diagram: 1-Valve body, 2-Valve cover, 3-Valve stem, 4-Actuator box, 5-Base, 6-Filter cylinder, 7-Bellwall, 8-First elastic element, 9-Second elastic element, 10-Upper magnetic ring, 11-Lower magnetic ring, 12-Upper coil assembly, 13-Lower coil assembly, 101-Inlet flow channel, 102-Outlet flow channel, 103-Valve seat port, 104-Upper valve seat, 105-Lower valve seat, 301-Upper valve stem, 302-Lower valve stem, 303-Upper valve core, 304-Lower valve core, 305-Screw section, 306-Connecting sleeve, 307-Linkage shaft, 501-Inner channel, 502-Outer channel, 503-Guide post, 504-Lower cavity, 601-Scraper plate, 3091-First rocker arm, 3092-Second rocker arm, 3093-Rocker shaft, 3094-Channel. Detailed Implementation

[0015] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.

[0016] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "lateral", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element or component to have a specific orientation, or to be constructed and operated in a specific orientation.

[0017] It should be noted that the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different components and should not be construed as limiting the embodiments of this application.

[0018] It should be noted that the terms "installation," "setup," "equipped with," "connection," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral structures; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts.

[0019] It should be noted that the terms "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the above terms in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0020] Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] Regarding the accompanying drawings of this application, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not necessarily drawn to scale.

[0022] Existing safety valves for combustible ice mining are mostly single-valve structures, which have insufficient redundancy protection and are difficult to achieve stable emergency shut-off under harsh deep-sea conditions, posing safety hazards to mining operations.

[0023] Based on the above issues, such as Figures 1 to 3 As shown, this application proposes a dual-valve redundant safety valve for remote emergency shut-off in combustible ice mining, comprising a valve body 1, a valve cover 2, a valve stem 3, and an actuator box 4. The valve cover 2 is fixed to the top of the valve body 1 by high-strength bolts, forming a sealed cavity that can withstand the high-pressure environment of the deep sea. The actuator box 4 is fixedly installed above the valve cover 2, and its core function is to drive the valve stem 3 to rise and fall. Its integrated remote control module can receive wireless commands from a shore-based control console or mining platform, realizing contactless remote emergency shut-off, adapting to deep-sea scenarios where manual operation is impossible.

[0024] The valve body 1 has an inlet flow channel 101 and an outlet flow channel 102 running through it along its axis. A valve seat port 103 is provided between the inlet flow channel 101 and the outlet flow channel 102. An upper valve seat 104 and a lower valve seat 105 are respectively provided above and below the valve seat port 103. The two valve seats are coaxially arranged and appropriately spaced to form a double-stage sealing position. The valve stem 3 adopts a coaxial double-rod design, including an upper valve stem 301 and a lower valve stem 302. An upper valve core 303 is fixed to the lower end of the upper valve stem 301, and a lower valve core 304 is fixed to the upper end of the lower valve stem 302. The upper valve core 303 and the lower valve core 304 are respectively adapted to the sealing surfaces of the upper valve seat 104 and the lower valve seat 105. The material is a hard alloy resistant to low temperature and high pressure to ensure sealing reliability.

[0025] The lower valve stem 302 is connected to the upper valve stem 301 and can rise and fall synchronously with the upper valve stem 301. A high-precision lead screw section 305 is machined on its upper part. A connecting sleeve 306 is fixed to the center of the lower valve core 304 via an interference fit. The inner hole of the connecting sleeve 306 is machined with an internal thread, forming a precision helical fit with the lead screw section 305. A base 5 is bolted to the bottom of the valve body 1. An inner channel 501 is opened at the center of the base 5 to slide and engage with the lower valve stem 302. The inner wall of the inner channel 501 is coated with a wear-resistant coating to reduce wear during the movement of the lower valve stem 302. Several outer channels 502 are evenly distributed circumferentially on the base 5. Guide posts 503 are provided on the bottom surface of the lower valve core 304 corresponding to the outer channels 502. The guide posts 503 can slide smoothly along the outer channels 502, serving as guides and preventing torsion. A first elastic element 8, preferably a cylindrical helical compression spring, is provided between the lower valve core 304 and the base 5 to provide a continuous upward restoring force to the lower valve core 304 in its natural state.

[0026] When the valve is cut off, the remote control module issues a command, and the actuator 4 drives the upper valve stem 301 to move downward, causing the upper valve core 303 to descend synchronously and fit tightly against the sealing surface of the upper valve seat 104, forming the first reliable seal. At the same time, the lower valve stem 302 descends synchronously with the upper valve stem 301, and the lead screw section 305 and the connecting sleeve 306 rotate relative to each other. Since the guide post 503 restricts the circumferential rotation of the lower valve core 304, the helical engagement generates an upward driving force, pushing the lower valve core 304 to move smoothly upward along the outer channel 502. When the connecting sleeve 306 is completely disengaged from the lead screw section 305, the lower valve core 304 completes its final stroke under the restoring force of the first elastic element 8, and flexibly fits against the sealing surface of the lower valve seat 105 to form the second seal. This design is equivalent to achieving a reliable clamp-on seal. The buffering effect of the first elastic element 8 can effectively avoid rigid collision damage between the lower valve core 304 and the lower valve seat 105 caused by factors such as manufacturing precision deviation and long-term wear. This solves the problem of easy damage to traditional rigid drive seals and significantly extends the service life of the sealing pair.

[0027] In some embodiments, an upper magnetic ring 10 is inlaid on the lower end face of the upper valve seat 104, and a lower magnetic ring 11 is correspondingly inlaid on the upper end face of the lower valve seat 105. When the upper valve core 303 is in contact with the upper valve seat 104 and the lower valve core 304 is in contact with the lower valve seat 105, the strong adsorption force generated by the magnetic ring can enhance the sealing specific pressure and further improve the sealing reliability, especially suitable for deep-sea high-pressure working conditions.

[0028] In some embodiments, an upper coil assembly 12 is fixed inside the execution box 4 by a bracket. The upper end of the upper valve stem 301 extends into the execution box 4 and is integrally formed with an upper iron core that mates with the upper coil assembly 12. The upper iron core is made of a soft magnetic material to enhance the electromagnetic driving force. A linkage shaft 307 is fixed to the side of the upper iron core. A first swing rod 3091 and a second swing rod 3092 are hinged to the linkage shaft 307 by a hinge pin. The other end of the first swing rod 3091 is hinged to the inner wall of the execution box 4 by a hinge pin to form a stable swing fulcrum. One end of the second swing rod 3092 has an elongated channel. A swing shaft 3093 is hinged inside the execution box 4 by a bearing. One end of the swing shaft 3093 extends into the channel, and a second elastic element 9 is provided between the swing shaft 3093 and the second swing rod 3092.

[0029] When the upper coil assembly 12 is energized and generates magnetic force, it will quickly attract the upper iron core to move downward, causing the linkage shaft 307 to move downward synchronously, thereby driving the first rocker arm 3091 and the second rocker arm 3092 to swing around their respective hinge points. The rocker shaft 3093 slides along the length direction in the channel, while compressing the second elastic element 9. When the upper valve rod 301 continues to move downward beyond the critical point, the restoring force of the second elastic element 9 is released instantaneously, driving the upper valve rod 301 to move downward rapidly. The upper valve core 303 and the upper valve seat 104 quickly fit together to form a seal. This assist structure can improve the sealing response speed and ensure that the flow channel is quickly cut off in an emergency.

[0030] A lower cavity 504 is bolted to the base 5. A lower coil assembly 13 is fixed inside the lower cavity 504 via a bracket. The lower end of the lower valve stem 302 extends into the lower cavity 504 and is integrally formed with a lower iron core that mates with the lower coil assembly 13. The lower iron core is also made of soft magnetic material. The safety valve supports three driving modes to adapt to different operating conditions. First, when the upper coil assembly 12 and the lower coil assembly 13 are energized simultaneously, they generate a synergistic driving force, jointly driving the upper valve stem 301 and the lower valve stem 302 to move. This is suitable for extreme emergency conditions such as pipeline overpressure, and the cutting speed is faster. Second, when only the upper coil assembly 12 is energized, the upper valve stem 301 drives the lower valve stem 302 to move, which is suitable for conventional emergency cutting scenarios. Third, when only the lower coil assembly 13 is energized, it drives the lower valve stem 302 to move independently, which is suitable for emergency cutting when the upper valve stem 301 or the upper coil assembly 12 fails.

[0031] The core advantage of this design is that the two coil components can serve as backups for each other, with one serving as the primary drive source and the other as the emergency backup drive source. Furthermore, the working principle of the coil components ensures that their failure will not interfere with the operation of the other drive source, thus solving the problem of mutual interference when traditional motor drives are used as backups and significantly improving the redundancy and reliability of the drive system.

[0032] In some embodiments, a filter cylinder 6 is provided on the side of the base 5 facing the lower valve seat 105 via a step. The filter cylinder 6 is made of porous stainless steel with a pore size of 0.1-0.3mm, which can effectively filter out impurities such as mud and rock fragments mixed in the medium, prevent impurities from entering between the sealing surfaces of the upper valve seat 104, the lower valve seat 105 and the valve core, avoid wear or jamming of the sealing surfaces, and ensure sealing performance.

[0033] In a preferred embodiment, a scraper plate 601 is fixed to the outer periphery of the lower valve core 304. The scraper plate 601 is made of wear-resistant alloy steel, and its outer side is tightly fitted to the inner wall of the filter cylinder 6. When the lower valve core 304 moves up and down, the scraper plate 601 will move synchronously to scrape off the impurities attached to the inner wall of the filter cylinder 6, prevent the filter cylinder 6 from being blocked, ensure smooth flow of the medium, and at the same time avoid the accumulation of impurities from affecting the normal movement of the lower valve core 304.

[0034] In some embodiments, a bellows 7 is provided between the base 5 and the lower valve core 304. The bellows 7 is made of corrosion-resistant stainless steel, and its two ends are fixed to the base 5 and the lower valve core 304 respectively by clamps. It covers the outside of the guide post 503 and the outer channel 502 to prevent impurities in the medium from entering the outer channel 502, avoid the guide post 503 from getting stuck due to the accumulation of impurities, and ensure the smooth movement of the lower valve core 304.

[0035] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0036] Furthermore, it should be understood that in the foregoing description of the embodiments of this application, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this application. That is, the embodiments in this application can also be understood as an integration of multiple sub-embodiments. It is also valid when each sub-embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0037] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.

Claims

1. A remote emergency shut-off dual-valve redundant safety valve for combustible ice mining, characterized in that, The valve includes a valve body, valve cover, valve stem, and actuator box. The actuator box is used to drive the valve stem to rise and fall and includes a remote control module. The valve body has an inlet flow channel and an outlet flow channel, and a valve seat port is provided between the inlet flow channel and the outlet flow channel. The valve seat port is provided with an upper valve seat and a lower valve seat. The valve stem includes an upper valve stem and a lower valve stem. An upper valve core is provided on the upper valve stem, and a lower valve core is provided on the lower valve stem. The lower valve stem moves synchronously with the upper valve stem and is provided with a lead screw section. A connecting sleeve is provided on the lower valve core and is screwed to the lead screw section. The valve body has a base at its bottom, and the base has an inner channel that slides with the lower valve stem and several outer channels. The lower valve core has a guide post corresponding to the outer channel. A first elastic element is provided between the lower valve core and the base. When the upper valve stem descends, the upper valve core descends and forms a seal with the upper valve seat. When the lower valve stem descends, the lower valve core moves upward through the screw section and the connecting sleeve. When the connecting sleeve disengages from the screw section, the lower valve core forms a seal with the lower valve seat under the action of the first elastic element.

2. The remote emergency shut-off dual-valve redundant safety valve for combustible ice mining according to claim 1, characterized in that, The lower end face of the upper valve seat is provided with an upper magnetic ring, and the upper end face of the lower valve seat is provided with a lower magnetic ring corresponding to the upper magnetic ring.

3. The dual-valve redundant safety valve for remote emergency shut-off in combustible ice mining according to claim 1, characterized in that, The actuator box is equipped with an upper coil assembly. The upper valve stem includes an upper iron core that cooperates with the upper coil assembly. A linkage shaft is provided on the upper valve stem. A first rocker arm and a second rocker arm are hinged on the linkage shaft. The other end of the first rocker arm is hinged to the actuator box. A channel is opened at one end of the second rocker arm. A rocker shaft is hinged inside the actuator box. One end of the rocker shaft extends into the channel. A second elastic element is provided between the rocker shaft and the second rocker arm.

4. A remote emergency shut-off dual-valve redundant safety valve for combustible ice mining according to claim 3, characterized in that, The base is provided with a lower cavity, and a lower coil assembly is provided in the lower cavity. The lower valve stem includes a lower iron core that cooperates with the lower coil assembly. The upper coil assembly and the lower coil assembly drive the valve stem to move simultaneously, or the upper coil assembly drives the valve stem to move, or the lower coil assembly drives the valve stem to move.

5. A remote emergency shut-off dual-valve redundant safety valve for combustible ice mining according to claim 1, characterized in that, A filter cylinder is mounted on the base and abuts against the lower valve seat.

6. A remote emergency shut-off dual-valve redundant safety valve for combustible ice mining according to claim 5, characterized in that, A scraper plate is provided on the outer periphery of the lower valve core, and the scraper plate moves with the lower valve core to scrape away debris from the inner wall of the filter cylinder.

7. A remote emergency shut-off dual-valve redundant safety valve for combustible ice mining according to claim 6, characterized in that, A bellows is provided between the base and the lower valve core, and the bellows covers the outside of the guide post.

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