Damping device of expansion structure for power plant pipeline

Abstract

A damping device of an expansion structure for a power plant pipeline is applied to an offshore tidal power platform and achieves elastic energy absorption, uniform load and crack prevention through a corrugated damping bin. The auxiliary supporting bracket is embedded with the framework, limited and stretched, consumes energy by virtue of friction, and supports quick disassembly and maintenance of bolts at the same time; the design of the groove has shear resistance, and the embedded structure saves space; the coaxial precision of the sealing cover is less than 0.1 mm, so that salt mist invasion is effectively blocked; a circuit pipeline adopts a dynamic sealing technology, an insulating layer is protected, and 72-hour emergency guarantee is provided; the supporting columns are matched with the structure and conduct vibration, and the four columns arranged in the circumferential direction are uniform in force and resistant to impact. Due to the design of the wave crest and valley reinforcing ribs, cracks are inhibited; the zinc-aluminum coating achieves the anti-corrosion effect through the sacrificial anode, the sealant has the self-repairing function and prevents leakage, and the threaded rod can adjust tension without being disassembled to adapt to tidal changes.

Description

Technical Field

[0001] This article belongs to the field of marine engineering equipment industry, and specifically relates to a shock-absorbing device with an expansion structure for power plant pipelines. Background Art

[0002] In the marine engineering equipment industry, circuit pipelines are the core of maintaining platform power supply, signal transmission and equipment control. Especially in offshore tidal power platforms, drilling platforms, floating production storage and offloading vessels and other facilities, they undertake the key tasks of distributing electrical energy, transmitting control signals and ensuring communication stability. Their stable operation is directly related to the platform's safety, continuous operation capability and disaster resistance.

[0003] Existing devices mostly rely on materials such as rubber, metal springs or polyurethane. Their shock absorption effect is limited to a narrow frequency response range, making it difficult to cover the complex vibration environment at sea, resulting in insufficient suppression of low-frequency vibrations and limited filtering effect on high-frequency vibrations. At the same time, the materials have poor adaptability to extreme environments. The high salt fog and high humidity environment in the ocean accelerate the aging and hardening of rubber and the corrosion fatigue of metal springs, causing the shock absorption performance to decay rapidly and the service life to be significantly shortened compared to the land environment. Shock absorption devices are mostly rigid mechanical structures. Although they can limit pipeline displacement, they lack dynamic adjustment capabilities and cannot optimize damping parameters in real time according to vibration intensity. In addition, their size and weight are too large, occupying the limited space of the platform and increasing the structural load, which is particularly contradictory to the lightweight demand for deep-water equipment. Summary of the Invention

[0004] To address the obvious drawbacks of existing methods, this paper proposes a shock-absorbing device with an expansion structure for power plant pipelines. This device can effectively cope with the special usage scenarios of offshore tidal power platforms and improve the stability and safety of the pipeline system.

[0005] A shock absorbing device with an expansion structure for a power plant pipeline, applied to an offshore tidal power platform, comprising:

[0006] Corrugated shock absorber: It has a cylindrical structure with a pipe hole running through its vertical center and a corrugated expansion structure on the periphery. The corrugated structure absorbs the axial and radial vibration energy of the pipe through elastic deformation, compensating for thermal expansion and contraction. The cylindrical symmetrical design evenly distributes the vibration load, avoiding fatigue cracks caused by local stress concentration.

[0007] Auxiliary support bracket: A circular array is arranged on the periphery of the corrugated expansion structure, including a pair of symmetrically arranged grooved metal sheets, connecting bolts and support columns; a bolt hole is provided in the center of the grooved metal sheet, which is fixed to both sides of the corrugated shock-absorbing tank by connecting bolts; the support column is a metal rod structure, and the two ends are vertically embedded in the grooves of the two metal sheets to limit the excessive stretching of the corrugated expansion structure and provide radial support. The support column is embedded in the groove of the metal sheet to form a rigid skeleton, which limits the excessive stretching of the corrugated structure and prevents metal fatigue fracture. Friction damping is generated on the contact surface between the support column and the corrugated structure, converting high-frequency vibration into heat energy dissipation. Bolt connection realizes modular assembly of the bracket, and the offshore platform can replace damaged parts by one person without the aid of heavy tools. The groove structure resists the lateral shear force caused by the tide to ensure that the support column is not dislocated. The embedded structure makes the support column only bear compression / tension to avoid bending moment. The groove embedded design reduces protruding parts to adapt to narrow platform space.

[0008] Sealing cover: It is located at both ends of the corrugated shock-absorbing chamber. A sealing pipe hole is set in the center, which is coaxial with the pipe hole. The coaxiality error is less than 0.1mm. This ensures that the sealing ring is evenly compressed when the pipeline vibrates, and blocks the high-humidity salt fog from invading the interior of the corrugated shock-absorbing chamber. The sealing cover and the pipe are well matched to allow the pipeline to expand and contract axially.

[0009] Circuit pipe: It passes through the pipe hole and the sealing pipe hole to form a dynamic sealing connection. The elastic sealing layer compensates for the micro-vibration of the pipe and avoids the damage of the insulation layer caused by direct friction between metals.

[0010] The circuit pipe runs through the pipe hole and the sealing pipe hole, forming a dynamic sealing connection with the shock-absorbing device. The dynamic sealing structure allows the pipe to move axially during vibration, and the elastic sealing layer prevents direct friction between the metal and the insulation layer. The sealing system can still ensure that the circuit pipe is waterproof for 72 hours even if the corrugated shock-absorbing chamber is damaged, thereby preventing sudden power outages on the tidal platform.

[0011] The bolt hole diameter of the grooved metal sheet matches the support column diameter, eliminating assembly gaps and allowing 100% of the vibration energy to be transmitted to the bracket through the support column. The tight fit of the auxiliary support bracket system can block salt spray from invading the bolt thread gap and reduce the corrosion rate.

[0012] At least four support columns are evenly distributed along the circumference of the corrugated shock-absorbing tank. The evenly distributed support columns form an annular rigid skeleton, which evenly disperses the multi-directional impact force of the tide and limits the pipeline amplitude to a safe threshold. When a single support column breaks, the remaining columns still provide partial support force to prevent the system from collapsing.

[0013] Annular reinforcement ribs are provided at the crests and troughs of the corrugated expansion structure. The reinforcement ribs disperse the local stress of the support column and suppress cracks caused by metal fatigue of the corrugated expansion structure.

[0014] The sealing cover is fixed to the end of the corrugated shock-absorbing tank by welding, and a corrosion-resistant sealing ring is provided on the joint surface. The double insurance design of welding and sealing ring effectively prevents seawater penetration.

[0015] The surface of the grooved metal sheets and support columns is coated with a marine-grade anti-corrosion coating containing zinc-aluminum flake layers. The substrate is still protected by sacrificial anodes at scratched areas. Antifouling agents can also be added to the coating to reduce vortex-induced vibrations caused by the attachment of organisms such as barnacles.

[0016] The corrugated shock-absorbing chamber and the circuit pipe are filled with an elastic sealing rubber layer that is resistant to salt water corrosion. It is used to compensate for the thermal expansion and contraction of the pipe and prevent peeling of the sealing interface. When the rubber layer is slightly damaged, it expands when exposed to salt water and automatically seals the crack.

[0017] The support column is a two-way threaded adjustment rod, both ends of which are fixed to the grooved metal sheet by locking nuts. By rotating the adjustment rod, the support tension can be changed to adapt to different tidal conditions.

[0018] Beneficial effects:

[0019] The device achieves elastic energy absorption and load distribution to prevent cracking through a corrugated shock-absorbing chamber; the auxiliary support bracket is embedded in the frame, limiting stretching and dissipating energy through friction, while supporting quick-disassembly and maintenance of bolts; the groove design has shear resistance, and the embedded structure saves space; the coaxial accuracy of the sealing cover is less than 0.1 mm, effectively blocking the intrusion of salt spray; the circuit pipe adopts dynamic sealing technology to protect the insulation layer and provide 72-hour emergency support; the support column matches the structure to transmit vibration, and the four circumferentially arranged columns are evenly impact-resistant; the design of the peak and valley reinforcement ribs inhibits the occurrence of cracks; the zinc-aluminum coating achieves anti-corrosion effect through sacrificial anodes, the sealant has self-repair function to prevent leakage, and the threaded rod can adjust the tension without disassembly to adapt to tidal changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a connection diagram of a shock absorbing device with an expansion structure for a power plant pipeline.

[0021] Figure 2 This is a front view of a shock absorbing device with an expansion structure for power plant pipelines.

[0022] Figure 3 This is a cross-sectional view of a shock-absorbing device with an expansion structure for power plant pipelines.

[0023] In the figure: 1. Corrugated shock-absorbing chamber, 2. Auxiliary support bracket, 3. Sealing cover, 4. Circuit pipe. DETAILED DESCRIPTION

[0024] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0025] Corrugated shock-absorbing chamber 1, auxiliary support bracket 2, sealing cover 3, circuit pipe 4.

[0026] like Figure 1 、 2 , as shown in 3

[0027] A shock-absorbing device with an expansion structure for power plant pipelines. The device is mainly used in power plant pipeline systems, especially in offshore tidal power platforms. The device consists of a corrugated shock-absorbing chamber 1, an auxiliary support bracket 2, a sealing cover 3, and a circuit pipeline 4.

[0028] The corrugated shock-absorbing tank 1 is cylindrical, with a pipe hole running vertically through the center and a corrugated expansion structure designed on the periphery;

[0029] The auxiliary support brackets 2 are arranged in a circular array around the periphery of the corrugated expansion structure and include a pair of symmetrical grooved metal sheets, connecting bolts, and support columns. The grooved metal sheets are provided with bolt holes in the center and are firmly fixed to both sides of the corrugated shock absorber tank 1 through connecting bolts. The support columns are metal rod structures, with both ends vertically embedded in the grooves of the metal sheets to provide stable support.

[0030] The sealing covers 3 are respectively installed at both ends of the corrugated shock-absorbing chamber 1. A sealing pipe hole coaxial with the pipe hole is provided in the center to ensure good sealing. The circuit pipe 4 passes through these pipe holes and the sealing pipe hole to form a dynamic sealing connection, which can maintain stable performance in a dynamic environment.

[0031] The bolt hole size of the grooved metal sheet matches the diameter of the support column, making the installation more stable. The support columns are evenly arranged along the circumference of the corrugated shock absorber 1, and at least four are provided to ensure sufficient support force under various working conditions. The corrugated expansion structure is provided with annular reinforcement ribs at the peaks and troughs of the waves, which enhances the strength and durability of the structure.

[0032] The sealing cover 3 is fixed to the end of the corrugated shock-absorbing chamber 1 by welding. A corrosion-resistant sealing ring is provided at the joint surface to further improve the sealing effect. The surface of the grooved metal sheet and the support column is coated with a marine environment-grade anti-corrosion coating to withstand the harsh marine environment. The space between the corrugated shock-absorbing chamber 1 and the circuit pipe 4 is filled with a saltwater-resistant elastic sealant layer to ensure long-term reliability.

[0033] The support column adopts a two-way threaded adjustment rod design, with both ends fixed to the grooved metal sheet by locking nuts, which is convenient for adjustment in actual application to adapt to the use requirements under different tidal conditions;

[0034] Through these designs, the shock absorber can not only effectively absorb vibration energy, but also provide long-lasting and stable performance guarantees in complex and changeable marine environments.

[0035] Implementation example:

[0036] During installation, first put the corrugated shock-absorbing tank 1 into the pre-installed circuit pipe 4 to ensure that the gap between the pipe hole and the pipe is uniform, then attach the grooved metal sheet to both sides of the corrugated shock-absorbing tank 1, insert the connecting bolts for pre-tightening, and then vertically embed the support column into the groove of the metal sheet, apply thread locking glue and tighten the locking nut, evenly distribute no less than 4 support columns along the circumference of the corrugated shock-absorbing tank 1, lay a corrosion-resistant sealing ring on the end face of the corrugated shock-absorbing tank 1, fit the sealing cover 3, continuously and fully weld, and after welding, the penetration test for no air holes is carried out, rotate the two-way threaded adjustment rod, and inject salt-resistant sealant under high pressure from the injection port, apply zinc-aluminum anti-corrosion paint to the scratches during the installation process, and conduct a 48-hour salt spray test after repair to ensure compliance.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A shock absorbing device with an expansion structure for a power plant pipeline, applied to an offshore tidal power platform, characterized in that: include: Corrugated shock-absorbing chamber, auxiliary support bracket, sealing cover and circuit pipe; The corrugated shock-absorbing chamber is cylindrical in structure, a pipe hole is provided in the vertical center of the corrugated shock-absorbing chamber, and a corrugated expansion structure is provided on the periphery of the corrugated shock-absorbing chamber; The auxiliary support bracket is arranged on the periphery of the corrugated expansion structure, and includes a pair of symmetrically arranged grooved metal sheets, connecting bolts for connecting the pair of metal sheets and fixing them to the two sides of the corrugated shock-absorbing tank, and a support column. The center of the grooved metal sheet is provided with a bolt hole, and is fixed to the two sides of the corrugated shock-absorbing tank by the connecting bolts. The support column is a metal rod structure, and the two ends are respectively vertically embedded in the grooves of the two metal sheets; The sealing covers are respectively arranged at both ends of the corrugated shock-absorbing chamber, and a sealing pipe hole coaxial with the pipe hole is provided in the center; The circuit pipe passes through the pipe hole and the sealing pipe hole, and forms a dynamic sealing connection with the shock absorbing device.

2. The shock absorbing device of the expansion structure for power plant pipeline according to claim 1, characterized in that: The size of the bolt hole of the groove-shaped metal sheet matches the diameter of the support column.

3. A shock absorbing device for an expansion structure of a power plant pipeline according to claim 1 or 2, characterized in that: At least four support columns are evenly distributed along the circumference of the corrugated shock-absorbing bin.

4. The shock absorbing device of the expansion structure for power plant pipeline according to claim 1, characterized in that: Annular reinforcement ribs are provided at the crests and troughs of the corrugated expansion structure.

5. The shock absorbing device of the expansion structure for power plant pipeline according to claim 1, characterized in that: The sealing cover is fixed to the end of the corrugated shock-absorbing bin by welding, and a corrosion-resistant sealing ring is provided on the joint surface.

6. The shock absorbing device of the expansion structure for power plant pipeline according to claim 1, characterized in that: The surfaces of the grooved metal sheets and the support columns are coated with marine environment-grade anti-corrosion coatings.

7. The shock absorbing device of the expansion structure for power plant pipeline according to claim 1, characterized in that: An elastic sealing rubber layer resistant to salt water corrosion is filled between the corrugated shock-absorbing chamber and the circuit pipeline.

8. The shock absorbing device of the expansion structure for power plant pipeline according to claim 1, characterized in that: The support column is a two-way threaded adjustment rod, both ends of which are fixed to the groove-shaped metal sheet through locking nuts.

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