Submarine hydrogen pipeline buckling restraint device

Abstract

The application discloses a kind of submarine hydrogen pipeline buckling fixing device, including hydrogen pipeline body, welding glue gas pressure multiple omnidirectional pull buckling mechanism and rigid-flexible positioning mechanism, welding glue gas pressure multiple omnidirectional pull buckling mechanism is set to hydrogen pipeline body outer wall, rigid-flexible positioning mechanism is connected in the lower wall of welding glue gas pressure multiple omnidirectional pull buckling mechanism.The application belongs to the technical field of submarine pipeline construction, specifically provides a kind of submarine hydrogen pipeline buckling fixing device, utilizes array distribution type welding, high-strength adhesive and the multiple combination locking mode of gas pressure locking to carry out multiple combination type pull to hydrogen pipeline, solve the technical problem that it is difficult to effectively pull hydrogen pipeline and difficult to effectively avoid buckling propagation in the prior art, utilize simple elastic positioning mode to make hydrogen pipeline have flexible characteristics and have automatic reset function, the possibility of buckling of hydrogen pipeline due to seawater disturbance is reduced by coordination buffering mode.

Description

Technical Field

[0001] This invention relates to the field of submarine pipeline construction technology, and more specifically, to a buckling-fixing device for submarine hydrogen transport pipelines. Background Technology

[0002] With the continuous expansion of the hydrogen energy industry, existing vehicle-mounted hydrogen transportation methods are gradually failing to meet demand. Pipeline hydrogen transportation is increasingly being promoted and applied due to its high transportation efficiency, large capacity, and labor savings. Submarine hydrogen pipelines have emerged as a result. However, submarine hydrogen pipelines face challenges such as high internal and external pressures and significant seawater disturbance. During operation, if the anti-buckling treatment of the pipeline is inadequate, buckling and buckling propagation can easily occur. Buckling propagation can lead to the destruction of the entire pipeline, causing significant economic, social, and ecological losses. Existing submarine pipeline anti-buckling devices have the following problems:

[0003] (1) When buckling occurs in a submarine pipeline, it is a crushed deformation that gradually propagates along the pipeline. Existing technologies generally cannot generate a reliable and effective omnidirectional traction on the pipeline wall, and cannot meet the requirements for preventing buckling of the pipeline.

[0004] (2) Existing technologies cannot meet the requirements of preventing seawater disturbance for fixing submarine pipelines. If the pipeline is not fixed, the pipeline as a whole is in a flexible state and is prone to large swings and local stress concentration and deformation due to seawater disturbance, which can lead to buckling. If the pipeline is fixed, the pipeline between the anti-buckling devices is in a semi-rigid state and is prone to deformation due to collisions with debris in the seawater. Summary of the Invention

[0005] (I) Technical Issues

[0006] In view of the problems existing in the prior art, the present invention aims to provide a buckling-resistant fixing device for submarine hydrogen pipelines. Addressing the technical problem that existing technologies cannot reliably and effectively exert omnidirectional traction on the pipeline wall, the invention creatively sets up a multi-stage omnidirectional traction buckling-resistant mechanism using welding adhesive and pneumatic pressure. This mechanism utilizes a multi-stage combination of array distributed welding, high-strength adhesive bonding, and pneumatic locking to exert multiple stages of traction on the hydrogen pipeline, effectively preventing the possibility of collapse and deformation due to buckling propagation. This solves the technical problems of difficulty in effectively tractioning hydrogen pipelines and effectively preventing buckling propagation in existing technologies.

[0007] (II) Technical Solution

[0008] The technical solution adopted in this invention is as follows: A buckling-resistant fixing device for a subsea hydrogen pipeline includes a hydrogen pipeline body, a welding adhesive pneumatic multi-directional omnidirectional traction buckling-resistant mechanism, and a rigid-flexible positioning mechanism. The welding adhesive pneumatic multi-directional omnidirectional traction buckling-resistant mechanism is sleeved on the outer wall of the hydrogen pipeline body, and the rigid-flexible positioning mechanism is snapped onto the lower wall of the welding adhesive pneumatic multi-directional traction buckling-resistant mechanism. The welding adhesive pneumatic multi-directional omnidirectional traction buckling-resistant mechanism includes an omnidirectional traction buckling-resistant valve shell and a covered airtight valve shell, with the omnidirectional traction buckling-resistant valve shells symmetrically distributed and sleeved. Located on the outer wall of the hydrogen pipeline body, the lower edge of the omnidirectional tension anti-bending valve shell is hinged to each other. The airtight valve shell is symmetrically distributed and sleeved on the outer wall of the omnidirectional tension anti-bending valve shell. The lower edge of the airtight valve shell is hinged to each other. The rigid-flexible positioning mechanism includes a connecting locking member, a flexible buffer base plate, and a self-anchoring fixing drill rod. The connecting locking member is located on the lower wall of the airtight valve shell. The flexible buffer base plate is slidably snapped onto the lower wall of the connecting locking member. The self-anchoring fixing drill rod is symmetrically distributed and slidably penetrates the upper wall of the flexible buffer base plate.

[0009] As a further preferred embodiment of this solution, the sidewalls of the omnidirectional traction anti-bending valve are arrayed with welding holes, and the upper wall of the omnidirectional traction anti-bending valve is fixed with anti-bending locking plates. The sidewalls of the anti-bending locking plates are symmetrically distributed with anti-bending locking holes, and anti-bending locking bolts are provided inside the anti-bending locking holes.

[0010] Furthermore, the inner wall array of the omnidirectional traction anti-flexion valve shell is provided with circumferential glue injection guide grooves, and the upper and lower edges of the omnidirectional traction anti-flexion valve shell are respectively provided with glue injection connecting grooves. The side walls of the anti-flexion locking plates that are close to each other are respectively provided with longitudinal glue injection guide grooves. The longitudinal glue injection guide grooves are respectively connected to the upper end of the circumferential glue injection guide grooves, and the glue injection connecting grooves are respectively connected to the circumferential glue injection guide grooves.

[0011] Furthermore, lower engaging positioning components are fixedly provided on the lower wall of the airtight valve shell, and positioning locking holes are distributed in an array on the side wall of the lower engaging positioning components. Positioning locking bolts are provided on the inner wall of the positioning locking holes. Covering locking components are fixedly provided on the upper wall of the airtight valve shell, and covering locking holes are provided on the side wall of the covering locking components. Covering locking bolts are provided on the inner wall of the covering locking holes.

[0012] Furthermore, the side wall of the connecting locking component is provided with a grid of positioning holes, which are respectively set to correspond to the positioning locking holes. The lower wall of the connecting locking component is symmetrically provided with sliding rails.

[0013] Furthermore, the upper wall of the flexible buffer substrate is symmetrically provided with positioning slots, and sliding rails are slidably engaged with the inner wall of the positioning slots. Buffer side plates are symmetrically fixedly provided on the edge of the upper wall of the flexible buffer substrate. Buffer components are arrayed on the side walls of the buffer side plates that are close to each other. The ends of the buffer components that are close to each other are fixedly connected to the side walls of the connecting locking components. The buffer components include buffer springs and corrugated sleeves. The buffer springs and corrugated sleeves are fixedly provided on the side walls of the buffer side plates that are close to each other. The buffer springs are located inside the corrugated sleeves. The ends of the buffer springs and corrugated sleeves that are away from the buffer side plates are fixedly connected to the side walls of the connecting locking components. Anchor fixing plates are symmetrically fixedly provided on the side walls of the flexible buffer substrate. Anchor fixing holes are provided through the upper wall of the anchor fixing plates.

[0014] As a further preferred embodiment of this scheme, the self-anchoring drill rods are slidably mounted on the inner wall of the anchoring hole. A vibratory sinking end rod is fixedly mounted on the upper end of the self-anchoring drill rod, which is located above the anchoring plate. A lifting self-anchoring T-shaped plate is rotatably mounted on the annular array of the circumferential sidewalls of the self-anchoring drill rod. Anchoring blocks are fixedly mounted on the annular array of the circumferential sidewalls of the self-anchoring drill rod, and the anchoring blocks are located on the lower side of the lifting self-anchoring T-shaped plate. A sinking convergence groove is provided on the annular array of the circumferential sidewalls of the self-anchoring drill rod.

[0015] Furthermore, rubber waterproof strips are fixedly installed on the sidewalls of the omnidirectional traction anti-flexion valve shells that are close to each other, and rubber waterproof pads are fixedly installed on the inner wall of the airtight valve shell.

[0016] Furthermore, neoprene rubber is preferred for both the rubber waterproof strip and the rubber waterproof pad.

[0017] Furthermore, the anti-bending locking bolt, positioning locking bolt, wrapping locking bolt, and vibration impact end rod are preferably made of duplex stainless steel, while the self-anchoring T-plate is preferably made of titanium alloy.

[0018] (III) Beneficial Effects

[0019] (1) The welding adhesive gas pressure multi-directional traction anti-buckling mechanism uses a combination of array distributed welding, high-strength adhesive and gas pressure locking to reliably pull the hydrogen pipeline, effectively avoiding the possibility of the hydrogen pipeline being crushed and deformed due to buckling propagation. It solves the technical problem that it is difficult to effectively pull the hydrogen pipeline and avoid buckling propagation in the existing technology.

[0020] (2) The rigid-flexible positioning mechanism uses a simple elastic positioning method to make the hydrogen pipeline flexible and have an automatic reset function. Under the action of seawater disturbance, the upper part of the equipment will slide back and forth. The equipment has a damping buffer effect, so that the hydrogen pipeline can have both rigid characteristics to resist large swing deformation and flexible characteristics to coordinate and buffer the action of seawater disturbance, effectively reducing the possibility of buckling of the hydrogen pipeline due to seawater disturbance.

[0021] (3) The omnidirectional tension anti-bending valve shell forms a multi-layered welding relationship with the hydrogen pipeline body from the inside out and from the center to the edge through the welding holes, which significantly improves the welding reliability between the omnidirectional tension anti-bending valve shell and the hydrogen pipeline body.

[0022] (4) When the omnidirectional tension anti-bending valve shell is closed and the hydrogen pipeline body is locked, the longitudinal glue injection guide groove, the circumferential glue injection guide groove, the glue injection connecting groove and the outer wall of the hydrogen pipeline body together form an annular grid-like glue injection channel, so that the glue can be distributed at all angles of the outer wall of the hydrogen pipeline body, further improving the connection strength between the omnidirectional tension anti-bending valve shell and the hydrogen pipeline body.

[0023] (5) The rubber waterproof strip and rubber waterproof pad make the airtight valve shell and the omnidirectional tension anti-bending valve shell in a sealed contact, thereby forming a sealed space inside each weld hole. The airtight valve shell generates air pressure adsorption force between the hydrogen pipeline body and the airtight valve shell through airtight connection, making it difficult for the hydrogen pipeline body to deform and detach from the omnidirectional tension anti-bending valve shell, thereby further improving the connection strength between the omnidirectional tension anti-bending valve shell and the hydrogen pipeline body.

[0024] (6) The self-anchoring T-plate is bound by the seabed rock and soil layer when the self-anchoring fixed position drill rod is drilled down, and unfolds when the self-anchoring fixed position drill rod is lifted, which enables the self-anchoring fixed position drill rod to automatically anchor the hydrogen pipeline. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a buckling-fixing device for a submarine hydrogen transport pipeline proposed in this invention;

[0026] Figure 2 This is a schematic diagram of the structure of the welding adhesive pneumatic multi-directional omnidirectional tension anti-buckling mechanism proposed in this invention;

[0027] Figure 3 This is a schematic diagram of the rigid-flexible positioning mechanism proposed in this invention;

[0028] Figure 4 This is a schematic diagram of the omnidirectional traction-type anti-flexion valve shell assembly proposed in this invention;

[0029] Figure 5 This is a schematic diagram of the omnidirectional traction-type anti-flexion valve shell proposed in this invention;

[0030] Figure 6 This is a schematic diagram of the structure of the airtight valve shell proposed in this invention;

[0031] Figure 7 This is a schematic diagram of the connecting locking component proposed in this invention;

[0032] Figure 8 This is a schematic diagram of the flexible buffer substrate proposed in this invention;

[0033] Figure 9 This is a cross-sectional structural diagram of the buffer component proposed in this invention;

[0034] Figure 10 This is a schematic diagram of the self-anchored fixed-position drill rod proposed in this invention.

[0035] Among them, 1. Hydrogen pipeline body; 2. Welding adhesive gas pressure multi-directional omnidirectional tension anti-buckling mechanism; 21. Omnidirectional tension anti-buckling valve shell; 211. Weld hole; 212. Anti-buckling locking plate; 2120. Anti-buckling locking hole; 2121. Anti-buckling locking bolt; 2122. Longitudinal adhesive injection guide groove; 213. Circumferential adhesive injection guide groove; 214. Adhesive injection connecting groove; 215. Rubber waterproof strip; 22. Wrapped airtight valve shell; 221. Lower locking and positioning component; 2210. Positioning locking hole; 2211. Positioning locking bolt; 222. Wrapped locking component; 2220. Wrapped locking... 2221. Hole, 2222. Covered locking bolt, 223. Rubber waterproof pad, 3. Rigid-flexible positioning mechanism, 31. Connecting locking component, 311. Positioning through hole, 312. Sliding rail, 32. Flexible buffer base plate, 321. Positioning slot, 322. Buffer side plate, 3220. Buffer component, 3221. Buffer spring, 3222. Corrugated sleeve, 323. Anchor fixing plate, 3230. Anchoring hole, 33. Self-anchoring fixing drill rod, 331. Vibration sinking end rod, 332. Lifting self-anchoring T-shaped plate, 333. Anchoring stop block, 334. Sinking convergence groove.

[0036] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0039] Example

[0040] Please see Figures 1-3 This solution provides a buckling arresting device for a subsea hydrogen pipeline, comprising a hydrogen pipeline body 1, a welding adhesive pneumatic multi-directional omnidirectional traction buckling arresting mechanism 2, and a rigid-flexible positioning mechanism 3. The welding adhesive pneumatic multi-directional omnidirectional traction buckling arresting mechanism 2 is sleeved on the outer wall of the hydrogen pipeline body 1, and the rigid-flexible positioning mechanism 3 is snapped onto the lower wall of the welding adhesive pneumatic multi-directional omnidirectional traction buckling arresting mechanism 2. The welding adhesive pneumatic multi-directional omnidirectional traction buckling arresting mechanism 2 includes an omnidirectional traction buckling arresting valve shell 21 and a covered airtight valve shell 22. The omnidirectional traction buckling arresting valve shell 21 is symmetrically distributed and sleeved on the outer wall of the hydrogen pipeline body 1. The lower wall edges of the omnidirectional tension anti-bending valve shell 21 are hinged to each other. The airtight valve shell 22 is symmetrically distributed and sleeved on the outer wall of the omnidirectional tension anti-bending valve shell 21. The lower wall edges of the airtight valve shell 22 are hinged to each other. The rigid-flexible positioning mechanism 3 includes a connecting locking member 31, a flexible buffer base plate 32 and a self-anchoring fixed position drill rod 33. The connecting locking member 31 is provided on the lower wall of the airtight valve shell 22. The flexible buffer base plate 32 is slidably snapped onto the lower wall of the connecting locking member 31. The self-anchoring fixed position drill rod 33 is symmetrically distributed and slidably penetrates the upper wall of the flexible buffer base plate 32.

[0041] Please see Figure 4 In this embodiment, the sidewall of the omnidirectional traction anti-bending valve shell 21 is provided with weld holes 211 distributed in an array. The upper wall of the omnidirectional traction anti-bending valve shell 21 is fixed with anti-bending locking plates 212 respectively. The sidewall of the anti-bending locking plates 212 is symmetrically provided with anti-bending locking holes 2120. Anti-bending locking bolts 2121 are provided inside the anti-bending locking holes 2120.

[0042] Please see Figure 5 In this embodiment, the inner sidewall of the omnidirectional traction anti-flexion valve shell 21 is provided with an array of circumferential glue injection guide grooves 213, and the upper and lower edges of the omnidirectional traction anti-flexion valve shell 21 are respectively provided with glue injection connecting grooves 214. The sidewalls of the anti-flexion locking plates 212 that are close to each other are respectively provided with longitudinal glue injection guide grooves 2122. The longitudinal glue injection guide grooves 2122 are respectively connected to the upper end of the circumferential glue injection guide grooves 213, and the glue injection connecting grooves 214 are respectively connected to the circumferential glue injection guide grooves 213.

[0043] Please see Figure 6 In this embodiment, the lower wall of the airtight valve shell 22 is fixedly provided with a lower engaging positioning member 221. The side wall of the lower engaging positioning member 221 is provided with positioning locking holes 2210 distributed in an array. The inner wall of the positioning locking hole 2210 is provided with a positioning locking bolt 2211. The upper wall of the airtight valve shell 22 is fixedly provided with a covering locking member 222. The side wall of the covering locking member 222 is provided with a covering locking hole 2220. The inner wall of the covering locking hole 2220 is provided with a covering locking bolt 2221.

[0044] Please see Figure 7 In this embodiment, the side wall of the connecting locking member 31 is provided with positioning through holes 311 distributed in an array. The positioning through holes 311 are respectively provided with corresponding positioning locking holes 2210. The lower wall of the connecting locking member 31 is symmetrically provided with sliding rails 312.

[0045] Please see Figure 8 , Figure 9 In this embodiment, the upper wall of the flexible buffer substrate 32 is symmetrically provided with positioning slots 321, and sliding rails 312 are slidably engaged with the inner wall of the positioning slots 321. Buffer side plates 322 are symmetrically fixedly provided along the edge of the upper wall of the flexible buffer substrate 32. Buffer members 3220 are arrayed on the adjacent sidewalls of the buffer side plates 322. The adjacent ends of the buffer members 3220 are fixedly connected to the sidewalls of the connecting locking member 31. The buffer member 3220 includes a buffer spring 3221 and... The corrugated sleeve 3222, the buffer spring 3221 and the corrugated sleeve 3222 are respectively fixedly installed on the side walls of the buffer side plate 322 that are close to each other. The buffer spring 3221 is installed inside the corrugated sleeve 3222. The ends of the buffer spring 3221 and the corrugated sleeve 3222 that are away from the buffer side plate 322 are respectively fixedly connected to the side wall of the connecting locking member 31. The side wall of the flexible buffer base plate 32 is symmetrically fixed with an anchor fixing plate 323. The upper wall of the anchor fixing plate 323 is provided with an anchoring hole 3230.

[0046] Please see Figure 10 In this embodiment, the self-anchoring drill rods 33 are slidably disposed on the inner wall of the anchoring hole 3230. The upper end of the self-anchoring drill rods 33 is fixedly provided with a vibrating impact end rod 331, which is disposed above the anchoring plate 323. The circumferential sidewall of the self-anchoring drill rods 33 is rotatably provided with lifting self-anchoring T-shaped plates 332. The circumferential sidewall of the self-anchoring drill rods 33 is fixedly provided with anchoring blocks 333, which are respectively disposed on the lower side of the lifting self-anchoring T-shaped plates 332. The circumferential sidewall of the self-anchoring drill rods 33 is provided with impact collection grooves 334.

[0047] Please see Figure 5 , Figure 6 In this embodiment, rubber waterproof strips 215 are fixedly provided on the side walls of the omnidirectional traction anti-flexion valve shell 21 that are close to each other, and rubber waterproof pads 223 are fixedly provided on the inner wall of the airtight valve shell 22.

[0048] Furthermore, in this embodiment, the rubber waterproof strip 215 and the rubber waterproof pad 223 are preferably made of neoprene rubber.

[0049] Furthermore, in this embodiment, the anti-bending locking bolt 2121, the positioning locking bolt 2211, the wrapping locking bolt 2221, and the vibration sinking end rod 331 are preferably made of duplex stainless steel, and the lifting self-anchoring T-plate 332 is preferably made of titanium alloy.

[0050] The implementation principle of this embodiment is as follows: Omnidirectional welding is performed on the outer wall of the hydrogen pipeline body 1 through the weld hole 211, so that the welding adhesive pneumatic multi-directional traction anti-bending mechanism 2 and the hydrogen pipeline body 1 are omnidirectionally welded. The welding adhesive pneumatic multi-directional traction anti-bending mechanism 2 and the hydrogen pipeline body 1 are further bonded firmly through the glue injection process. The sealing ring formed by the glue injection and the rubber make the weld hole 211 form an airtight space, thereby performing pneumatic traction on the hydrogen pipeline body 1. The welding adhesive pneumatic multi-directional traction anti-bending mechanism 2 and the hydrogen pipeline body 1 generate a triple omnidirectional traction effect of welding, adhesive and pneumatic adsorption. The rigid-flexible positioning mechanism 3 achieves automatic anchoring with the seabed upon drilling through the self-anchoring fixed positioning drill rod 33, and the flexible buffer plate 32 gives the welding adhesive pneumatic multi-directional traction anti-bending mechanism 2 the characteristics of rigid-flexible combination.

[0051] The specific implementation of this embodiment: This embodiment is designed and used in combination with the shipborne laying technology commonly used in existing submarine pipelines. When the operator lays the submarine hydrogen pipeline, a set of anti-bending fixing devices for submarine hydrogen pipelines provided in this solution is installed at certain intervals along the hydrogen pipeline. Before the installation operation, the operator first exposes the hydrogen pipeline in the installation area. In the initial state, the welding adhesive gas pressure multi-directional omnidirectional tension anti-bending mechanism 2 and the rigid-flexible positioning mechanism 3 are in a state of separation.

[0052] During the installation of the adhesive-pressurized multi-directional omnidirectional traction buckling arresting mechanism 2, the installers opened the omnidirectional traction buckling arresting valve shell 21 and the airtight valve shell 22 respectively, and fitted the omnidirectional traction buckling arresting valve shell 21 onto the outer wall of the hydrogen pipeline body 1. Then, the buckling arresting locking bolts 2121 were passed through the buckling arresting locking holes 2120 and locked, so that the buckling arresting locking plates 212 were tightly locked together, thus completing the initial locking between the omnidirectional traction buckling arresting valve shell 21 and the hydrogen pipeline body 1. The operators then used welding equipment to weld the inside of each welding hole 211 and the edge of the omnidirectional traction buckling arresting valve shell 21 near the hydrogen pipeline body 1, forming an all-round, multi-welding relationship between the omnidirectional traction buckling arresting valve shell 21 and the hydrogen pipeline body 1 from the inside out and from the center to the edge, which significantly improved the welding reliability between the omnidirectional traction buckling arresting valve shell 21 and the hydrogen pipeline body 1. After welding, the adhesive injection operation was performed. The installers used the adhesive injection channel formed by the longitudinal adhesive injection guide groove 2122 to inject adhesive. After the glue injection channel formed by the circumferential glue injection guide groove 213, the glue injection connecting groove 214, and the longitudinal glue injection guide groove 2122 is filled with glue, the sealing operation begins. The operator closes the wrapped airtight valve shell 22 and locks the wrapped locking member 222 by passing the wrapped locking bolts 2221 through the wrapped locking holes 2220, so that the wrapped locking members 222 fit tightly together, thereby making the sidewalls of the wrapped airtight valve shell 22 and the omnidirectional tension anti-bending valve shell 21 fit tightly together, and the rubber protective Water strip 215 and rubber waterproof pad 223 make airtight contact between the wrapped airtight valve shell 22 and the omnidirectional tension anti-bending valve shell 21, thereby forming a sealed space inside each weld hole 211. The two ends of the weld hole 211 are the wrapped airtight valve shell 22 and the hydrogen pipeline body 1, respectively. That is, the wrapped airtight valve shell 22 generates air pressure adsorption force between the hydrogen pipeline body 1 and the wrapped airtight valve shell 22 through airtight connection, so that the hydrogen pipeline body 1 is difficult to deform and detach from the omnidirectional tension anti-bending valve shell 21.

[0053] During the installation of the rigid-flexible positioning mechanism 3, the installers place the connecting locking component 31 between the lower engaging positioning components 221, and align the positioning through holes 311 with the positioning locking holes 2210. The installers then pass the positioning locking bolts 2211 through each positioning locking hole 2210 and the positioning through hole 311, thereby fixing the connecting locking component 31 and the lower engaging positioning component 221. This achieves the fixed connection between the welding adhesive pneumatic multi-directional omnidirectional tension buckling prevention mechanism 2 and the rigid-flexible positioning mechanism 3. After the rigid-flexible positioning mechanism 3 is installed, the buckling prevention and fixing device for the submarine hydrogen pipeline proposed in this scheme is laid into the seabed along with the hydrogen pipeline. When fixing the submarine hydrogen pipeline, the laying personnel use equipment to vibrate and impact the self-anchoring fixing drill rod 33. Under the vibration, the self-anchoring fixing drill rod 33 gradually drills into the interior of the seabed rock and soil layer. During the drilling process, the lifting self-anchoring T-plate 332 is blocked by the rock and soil layer and simultaneously converges into the sinking convergence groove 334. The impact on the drilling process is minimal. When the hydrogen pipeline is subjected to longitudinal disturbance by seawater, the pipeline drives the self-anchoring drill rod 33 to move upward. At this time, the lifting self-anchoring T-plate 332 is blocked by the seabed rock and soil layer and simultaneously unfolds and contacts the anchoring block 333, thereby significantly increasing the resistance to the self-anchoring drill rod 33 continuing to move upward, realizing automatic anchoring of the hydrogen pipeline. When the hydrogen pipeline is subjected to lateral disturbance by seawater, the hydrogen pipeline causes the welding adhesive gas pressure multi-directional omnidirectional traction anti-buckling mechanism 2 to bear lateral force, thereby causing the connecting locking part 31 to slide along the positioning slot 321. After the connecting locking part 31 slides, the buffer part 3220 generates a reverse force on both sides of the connecting locking part 31, thereby causing the connecting locking part 31 to return to its initial state. Thus, the welding adhesive gas pressure multi-directional omnidirectional traction anti-buckling mechanism 2 has the characteristic of reciprocating motion with seawater disturbance, buffering the hydrogen pipeline and significantly reducing the possibility of the hydrogen pipeline buckling due to excessive seawater disturbance force.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0056] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for fixing and preventing buckling of a subsea hydrogen pipeline, characterized in that: include, Hydrogen transport pipeline body (1); The welding adhesive gas pressure multi-directional omnidirectional tension buckling prevention mechanism (2) includes an omnidirectional tension buckling prevention valve shell (21) and a wrapped airtight valve shell (22). The omnidirectional tension buckling prevention valve shell (21) is symmetrically distributed and sleeved on the outer wall of the hydrogen pipeline body (1). The lower wall edges of the omnidirectional tension buckling prevention valve shell (21) are hinged to each other. The wrapped airtight valve shell (22) is symmetrically distributed and sleeved on the outer wall of the omnidirectional tension buckling prevention valve shell (21). The lower wall edges of the wrapped airtight valve shell (22) are hinged to each other. The rigid-flexible positioning mechanism (3) includes a connecting locking member (31), a flexible buffer base plate (32), and a self-anchoring fixed position drill rod (33). The connecting locking member (31) is disposed on the lower wall of the airtight valve shell (22). The flexible buffer base plate (32) is slidably engaged with the lower wall of the connecting locking member (31). The self-anchoring fixed position drill rod (33) is symmetrically distributed and slidably penetrates the upper wall of the flexible buffer base plate (32). The omnidirectional traction anti-bending valve shell (21) has welding holes (211) arranged in an array on its sidewalls. The omnidirectional traction anti-bending valve shell (21) has circumferential glue injection guide grooves (213) arranged in an array on its inner sidewalls. The omnidirectional traction anti-bending valve shell (21) has glue injection connecting grooves (214) arranged on its upper and lower inner edges. Rubber waterproof strips (215) are fixedly provided on the sidewalls of the omnidirectional traction anti-bending valve shell (21) that are close to each other. Rubber waterproof pads (223) are fixedly provided on the inner wall of the airtight valve shell (22). The operator first exposes the hydrogen pipeline in the installation area. When laying the subsea hydrogen pipeline, the operator installs anti-bending fixing devices along the pipeline at intervals, so that the omnidirectional tension anti-bending valve shell (21) is fitted onto the outer wall of the hydrogen pipeline body (1). Welding is performed on the inside of each weld hole (211) and the edge of the omnidirectional tension anti-bending valve shell (21) near the hydrogen pipeline body (1). After welding, the circumferential glue injection guide groove (213) and the glue injection connecting groove ( 214) Inject glue into the interior. After filling the glue, put the airtight valve shell (22) together. The rubber waterproof strip (215) and the rubber waterproof pad (223) make the airtight valve shell (22) and the omnidirectional tension anti-bending valve shell (21) in a sealed contact, so that a sealed space is formed inside each weld hole (211). The airtight valve shell (22) generates a gas pressure adsorption force between the hydrogen pipeline body (1) and the airtight valve shell (22) through an airtight connection.

2. The anti-bending and fixing device for a subsea hydrogen transport pipeline according to claim 1, characterized in that: The upper wall of the omnidirectional traction anti-bending valve shell (21) is fixed with anti-bending locking plates (212), and anti-bending locking holes (2120) are symmetrically distributed through the side wall of the anti-bending locking plates (2120). Anti-bending locking bolts (2121) are provided inside the anti-bending locking holes (2120).

3. The anti-bending and fixing device for a subsea hydrogen transport pipeline according to claim 2, characterized in that: The anti-bending locking plates (212) have longitudinal glue injection guide grooves (2122) on their adjacent side walls. The longitudinal glue injection guide grooves (2122) are connected to the upper end of the circumferential glue injection guide grooves (213). The glue injection connecting grooves (214) are connected to the circumferential glue injection guide grooves (213).

4. The anti-bending and fixing device for a subsea hydrogen transport pipeline according to claim 3, characterized in that: The lower wall of the airtight valve shell (22) is fixedly provided with a lower engaging positioning member (221). The side wall of the lower engaging positioning member (221) is provided with positioning locking holes (2210) arranged in an array. The inner wall of the positioning locking hole (2210) is provided with a positioning locking bolt (2211). The upper wall of the airtight valve shell (22) is fixedly provided with a covering locking member (222). The side wall of the covering locking member (222) is provided with a covering locking hole (2220). The inner wall of the covering locking hole (2220) is provided with a covering locking bolt (2221).

5. The anti-bending and fixing device for a subsea hydrogen transport pipeline according to claim 4, characterized in that: The connecting locking member (31) has positioning through holes (311) arranged in an array on its side wall. The positioning through holes (311) are respectively set to correspond to the positioning locking holes (2210). The connecting locking member (31) has sliding rails (312) symmetrically distributed and fixed on its lower wall.

6. The anti-bending and fixing device for a subsea hydrogen transport pipeline according to claim 5, characterized in that: The flexible buffer substrate (32) has symmetrically arranged positioning slots (321) on its upper wall. The sliding rails (312) are slidably engaged with the inner wall of the positioning slots (321). Buffer side plates (322) are symmetrically fixed to the edge of the upper wall of the flexible buffer substrate (32). Buffer members (3220) are arranged in an array on the adjacent sidewalls of the buffer side plates (322). The adjacent ends of the buffer members (3220) are fixedly connected to the sidewalls of the connecting locking member (31). The buffer member (3220) includes a buffer spring (3221) and a corrugated sleeve (…). 3222), the buffer spring (3221) and the corrugated sleeve (3222) are respectively fixedly disposed on the side walls of the buffer side plate (322) that are close to each other. The buffer spring (3221) is disposed inside the corrugated sleeve (3222). The ends of the buffer spring (3221) and the corrugated sleeve (3222) away from the buffer side plate (322) are respectively fixedly connected to the side wall of the connecting locking member (31). The side wall of the flexible buffer base plate (32) is symmetrically fixedly provided with anchor fixing plates (323). The upper wall of the anchor fixing plate (323) is provided with an anchoring hole (3230).

7. The anti-bending and fixing device for a subsea hydrogen transport pipeline according to claim 6, characterized in that: The self-anchoring drill rod (33) is slidably disposed on the inner wall of the anchoring hole (3230). The upper end of the self-anchoring drill rod (33) is fixedly provided with a vibratory sinking end rod (331). The vibratory sinking end rod (331) is disposed above the anchoring plate (323). The circumferential side wall of the self-anchoring drill rod (33) is rotatably provided with a lifting self-anchoring T-shaped plate (332). The circumferential side wall of the self-anchoring drill rod (33) is fixedly provided with an anchoring stop block (333). The anchoring stop block (333) is disposed on the lower side of the lifting self-anchoring T-shaped plate (332). The circumferential side wall of the self-anchoring drill rod (33) is provided with a sinking convergence groove (334).

8. The anti-bending and fixing device for a subsea hydrogen transport pipeline according to claim 7, characterized in that: The rubber waterproof strip (215) and the rubber waterproof pad (223) are made of neoprene rubber.

9. The anti-bending and fixing device for a subsea hydrogen transport pipeline as described in claim 8, characterized in that: The anti-bending locking bolt (2121), positioning locking bolt (2211), wrapping locking bolt (2221), and vibration sinking end rod (331) are made of duplex stainless steel, and the lifting self-anchoring T-plate (332) is made of titanium alloy.

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