Heat distribution pipeline flange connection corrugated damping connection process

Abstract

According to the novel corrugated damping connection technology suitable for heat distribution pipeline flange connection, the technology is mainly a corrugated damping device, the technology can effectively cope with special use scenes of an offshore working platform, the stability and safety of a pipeline system are improved, a corrugated damping body is of a stainless steel flexible structure, and therefore the service life of the corrugated damping device is prolonged. The sacrificial anode protection shell can efficiently absorb multidirectional vibration and impact caused by complex working conditions of an offshore platform, the stress concentration of the pipeline and the fatigue risk of a flange connecting point are remarkably reduced, and therefore the service life of the pipeline is prolonged, and the sacrificial anode protection shell innovatively adopts a magnesium alloy or zinc alloy lining layer and a conductive net-shaped structure; and in a salt mist humid environment, an anode material is preferentially corroded, cathode protection current is continuously output, electrochemical corrosion of a key connecting part is effectively inhibited, an outer-layer metal shell synchronously resists physical corrosion, the corrosion rate is obviously delayed through double protection, and the risk of medium leakage is fundamentally eradicated.

Description

Technical Field

[0001] This article belongs to the field of marine engineering equipment industry, and specifically involves a thermal pipeline flange connection corrugated vibration damping connection process. Background Art

[0002] In the daily operation of offshore oil drilling platforms, thermal pipelines are the core facilities for thermal recovery of heavy oil. They heat the formation heavy oil by transporting high-temperature steam, significantly reducing its viscosity and converting it into easily exploitable liquid crude oil, thereby improving the recovery rate. This is crucial for the development of offshore heavy oil resources such as the Bohai Sea. At the same time, thermal pipelines also undertake the functions of insulation and pretreatment of crude oil before external transportation, ensuring the stable flow of crude oil in the gathering and transportation system, and are a key link in maintaining the continuity and safety of platform production.

[0003] Existing thermal pipeline vibration reduction mainly relies on traditional materials such as rubber pads, springs or metal brackets, but these methods have obvious disadvantages. First, traditional materials have single performance and are difficult to adapt to the complex vibration environment at sea. The vibration reduction frequency band is narrow and easily fails due to frequency changes. In addition, they are prone to aging and fatigue in high temperature, high humidity and high corrosion environments for a long time, resulting in weakened elasticity or cracking, requiring frequent maintenance and replacement. Second, traditional vibration reduction structures are bulky, occupying valuable platform space, and are complex to install. In addition, some materials containing chemical additives may release volatile organic compounds, polluting the marine environment and threatening personnel health. Weak seismic links are prone to weld fatigue cracking under strong vibration, causing medium leakage accidents. Summary of the Invention

[0004] To address the obvious drawbacks of existing methods, this paper proposes a new corrugated vibration-damping connection process suitable for flange connections of thermal pipelines. This process mainly involves a corrugated vibration-damping device that can effectively cope with the special usage scenarios of offshore working platforms and improve the stability and safety of the pipeline system.

[0005] A corrugated vibration-damping connection process for flanged thermal pipes suitable for offshore oil drilling platform environments. Its core lies in a dedicated corrugated vibration-damping device for flanged thermal pipes. The device primarily comprises: a corrugated vibration-damping body; two flanges fixedly connected to the axial ends of the corrugated vibration-damping body; a through hole extending through the center of the corrugated vibration-damping body and the two flanges, the aperture of which matches the outer diameter of the thermal pipe to be connected; a connecting bracket coaxially sleeved on the outside of the corrugated vibration-damping body and located between the two flanges; the flanges are provided with annularly evenly distributed bolt holes, and a sacrificial anode protective shell covering the outermost area of the flanges. The device can effectively absorb multi-directional impact and vibration caused by the complex operating conditions of offshore platforms. The flexible deformation of the corrugated vibration-damping body provides excellent vibration damping, significantly reducing pipeline stress and fatigue risk at the flange connection. At the same time, the sacrificial anode protective shell forms an electrochemical protective barrier, actively resisting corrosion in high-salt fog and high-humidity marine environments, significantly improving the long-term reliability and safety of the thermal pipe flange connection points under harsh conditions.

[0006] The sacrificial anode protection shell adopts a multi-layer composite structure design, including:

[0007] Metal shell layer, providing basic mechanical protection;

[0008] The sacrificial anode lining layer is made of magnesium alloy or zinc alloy and is closely attached to the inner surface of the metal outer shell layer;

[0009] The conductive mesh structure is embedded in the sacrificial anode lining and ensures reliable electrical connection with the flange, connecting bracket and thermal pipe surface;

[0010] This design actively forms a complete electrochemical circuit between the protected metal components and the sacrificial anode lining through a conductive mesh structure. In the high salt fog and high humidity environment of seawater, the sacrificial anode material is corroded preferentially, thereby continuously providing cathodic protection current to the protected metal components, effectively suppressing their electrochemical corrosion rate. At the same time, the metal outer shell layer isolates the external physical impact and medium erosion, and the sacrificial anode lining layer is evenly consumed to provide long-term protection. The two work together to significantly extend the service life of key connection parts of thermal pipelines in harsh marine environments, and fundamentally avoid the risk of medium leakage caused by local corrosion failure of flange connection points, greatly improving the safety and reliability of platform operation.

[0011] The connecting bracket is a columnar structure, with both ends fixed to the inner end faces of the flange by fasteners, thereby ensuring a solid and reliable connection between the bracket and the flange, effectively enhancing the stability and safety of the overall structure, and being able to withstand greater pressure and torque, reducing the risk of loosening due to vibration or load changes, and improving the accuracy and durability of the equipment during operation.

[0012] The main body of the corrugated shock absorber is made of stainless steel, which has the advantages of corrosion resistance and high strength.

[0013] The thermal pipe flange connection corrugated vibration damping device includes the following steps:

[0014] S1: Install the corrugated shock absorber on one end of the thermal pipe, ensuring that the thermal pipe passes through the through hole of the corrugated shock absorber;

[0015] S2: Install another corrugated vibration damping device on one end of another section of thermal pipe, ensuring that the thermal pipe passes through the through hole of the corrugated vibration damping device;

[0016] S3: Align the ends of the two sections of thermal pipes with corrugated vibration dampers so that the flanges on the two sets of corrugated vibration dampers face each other;

[0017] S4: Align the bolt holes on the two opposing flanges and use bolts to connect them. Tighten the two flanges together and ensure that the connecting brackets of the two corrugated vibration damping devices are pressed into contact with each other.

[0018] S5: Install a sacrificial anode protection shell on the flange peripheral area of the two corrugated vibration damping devices after fastening and connection, so that a closed anti-corrosion cavity is formed between the inner wall of the protection shell and the outer surface of the device;

[0019] The corrugated shock absorber can effectively absorb and buffer the vibration and impact generated by the pipeline during operation, reduce fatigue damage to the pipeline, and extend the service life of the pipeline; through flange connection and bolt tightening, the sealing of the connection is ensured, preventing medium leakage and improving the safety of the system; after installing the sacrificial anode protective shell, the closed anti-corrosion cavity formed between the inner wall of the protective shell and the outer surface of the device can effectively prevent the erosion of the corrugated shock absorber by external corrosive media, further extending the service life of the device.

[0020] By tightening the bolts, the connecting brackets of the two sets of corrugated shock absorbers are pressed into contact with each other to form an axial force transmission path. At the same time, the two sets of corrugated shock absorber bodies constitute a parallel shock absorption system, thereby improving the overall shock absorption effect and stability.

[0021] Beneficial effects:

[0022] The corrugated shock absorber body adopts a stainless steel flexible structure, which can efficiently absorb the multi-directional vibration and impact caused by the complex working conditions of the offshore platform, significantly reducing the stress concentration of the pipeline and the fatigue risk of the flange connection point, thereby extending the service life of the pipeline. The sacrificial anode protection shell innovatively adopts a magnesium alloy or zinc alloy lining layer and a conductive mesh structure to form a complete electrochemical circuit with the metal components. In a salt spray and humid environment, the anode material corrodes first and continuously outputs the cathodic protection current, effectively suppressing the electrochemical corrosion of key connection parts. The outer metal shell simultaneously resists physical erosion. The double protection significantly slows down the corrosion rate and fundamentally eliminates the risk of medium leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flange connection diagram of the thermal pipeline flange connection corrugated shock-absorbing connection process.

[0024] Figure 2 This is a schematic diagram of the installation of a sacrificial anode protective shell using a thermal pipeline flange connection corrugated shock-absorbing connection process.

[0025] Figure 3 This is a side view of the flange connection of a thermal pipeline using a corrugated vibration damping connection process.

[0026] Figure 4 This is a schematic diagram of a thermal pipe connection corrugated vibration damping device using a thermal pipe flange connection corrugated vibration damping connection process.

[0027] Figure 5 This is a cross-sectional view of the thermal pipe flange connection corrugated vibration damping connection process.

[0028] In the figure: 1. Corrugated shock absorber body, 2. Flange, 3. Connecting bracket, 4. Bolt, 5. Thermal pipe, 6. Sacrificial anode protection shell. DETAILED DESCRIPTION

[0029] 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.

[0030] Corrugated shock absorber body 1, flange 2, connecting bracket 3, bolt 4, thermal pipe 5, sacrificial anode protection shell 6.

[0031] like Figure 1 、 2 , 3, 4, 5 as shown:

[0032] A corrugated shock-absorbing connection process for connecting a thermal pipe 5 with a flange 2 mainly provides a corrugated shock-absorbing device for connecting a thermal pipe 5 with a flange 2, suitable for an offshore oil drilling platform environment, comprising: a corrugated shock-absorbing body 1; two flanges 2, respectively fixedly connected to the axial ends of the corrugated shock-absorbing body 1; a through hole running through the center of the corrugated shock-absorbing body 1 and the two flanges 2, the aperture of the through hole matching the outer diameter of the thermal pipe 5, a connecting bracket 3, coaxially sleeved on the outside of the corrugated shock-absorbing body 1 and located between the two flanges 2, four annularly evenly distributed bolt holes provided on the flange 2, and a sacrificial anode protective shell 6 covering the outermost area of the flange 2.

[0033] The sacrificial anode protective shell 6 includes: a metal outer shell layer; a sacrificial anode lining layer, which is adhered to the inner surface of the metal outer shell layer, and the material of the sacrificial anode lining layer is magnesium alloy or zinc alloy; a conductive mesh structure, which is embedded in the sacrificial anode lining layer and is electrically connected to the flange 2, the connecting bracket 3 and the surface of the thermal pipe 5.

[0034] The connecting bracket 3 is a columnar structure, and both ends thereof are fixedly connected to the inner end surface of the flange 2 .

[0035] The corrugated shock-absorbing body 1 is made of stainless steel.

[0036] Connecting the thermal pipe 5 flange 2 to the corrugated vibration damping device includes the following steps:

[0037] The corrugated shock-absorbing device is sleeved on the end of the thermal pipe 5, and the thermal pipe 5 is passed through the through hole;

[0038] Put another corrugated damping device on the end of another section of the thermal pipe 5, so that the thermal pipe 5 passes through the through hole;

[0039] Butt the ends of two sections of thermal pipes 5 with corrugated shock absorbers, and make the corresponding flanges 2 on the two sets of corrugated shock absorbers face each other;

[0040] Align the bolt holes 4 on the two opposing flanges 2, use the bolts 4 to penetrate and connect them, and fasten the two flanges 2 together so that the connecting brackets 3 of the two sets of corrugated vibration damping devices are pressed and contacted with each other;

[0041] A sacrificial anode protection shell 6 is installed in the peripheral area of the flange 2 of the two sets of corrugated vibration damping devices after being fastened and connected, so that a closed corrosion-resistant cavity is formed between the inner wall of the protection shell and the outer surface of the device.

[0042] By tightening the bolts 4 , the connecting brackets 3 of the two sets of corrugated shock absorbing devices are pressed into contact with each other to form an axial force transmission path, and the two sets of corrugated shock absorbing bodies 1 constitute a parallel shock absorbing system.

[0043] Implementation example:

[0044] 1. Pre-treatment preparation: Use sandpaper to polish the end of the thermal pipe to be connected, remove rust, oil and burrs, ensure the metal surface is smooth, confirm that the through-hole diameter of the corrugated shock absorber matches the outer diameter of the pipe, the conductive mesh of the sacrificial anode protective shell is not broken, and the flange bolt hole is not deformed;

[0045] 2. For single-side installation, slide the corrugated shock absorber body axially into one end of the thermal pipe so that the pipe completely passes through the through hole;

[0046] 3. Align and initially fix the pipeline, and move another section of pipeline to align it coaxially with the first section of pipeline;

[0047] 4. Fasten the flange and bracket together, insert all bolts, manually pre-tighten until the nuts fit the flange, and tighten the bolts three times in diagonal order;

[0048] 5. Install the sacrificial anode protection shell. Snap the split protection shell onto the outer periphery of the flange and tighten the shell joint with anti-corrosion bolts.

[0049] 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 thermal pipe flange connection corrugated shock-absorbing connection process, which is mainly a thermal pipe flange connection corrugated shock-absorbing device, suitable for offshore oil drilling platform environment, characterized in that: include: Corrugated shock-absorbing body; Two flanges are fixedly connected to the axial ends of the corrugated shock-absorbing body respectively; A through hole running through the corrugated shock-absorbing body and the centers of the two flanges, wherein the diameter of the through hole matches the outer diameter of the thermal pipe; A connecting bracket is coaxially sleeved on the outside of the corrugated shock-absorbing body and located between the two flanges; The flange is provided with bolt holes evenly distributed in an annular pattern; The sacrificial anode protection shell is coated on the outermost area of the flange.

2. A thermal pipeline flange connection corrugated vibration damping device according to claim 1, characterized in that: The sacrificial anode protection shell comprises: Metal shell layer; A sacrificial anode lining layer is adhered to the inner surface of the metal outer shell layer, and the material of the sacrificial anode lining layer is magnesium alloy or zinc alloy; The conductive mesh structure is embedded in the sacrificial anode lining layer and is electrically connected to the flange, the connecting bracket and the surface of the thermal pipeline.

3. A thermal pipeline flange connection corrugated vibration damping device according to claim 1 or 2, characterized in that: The connecting bracket is a columnar structure, and both ends thereof are fixedly connected to the inner end surface of the flange.

4. A thermal pipeline flange connection corrugated vibration damping device according to claim 1 or 2, characterized in that: The corrugated shock-absorbing body is a stainless steel structure.

5. A thermal pipeline flange connection corrugated vibration damping connection process according to claim 1 or 2, characterized in that: The thermal pipe flange connection corrugated vibration damping device includes the following steps: S1. Sleeve the corrugated damping device onto the end of the thermal pipe, so that the thermal pipe passes through the through hole; S2. Sleeve another of the corrugated damping devices onto the end of another section of the thermal pipe, so that the thermal pipe passes through the through hole; S3, butting the ends of the two sections of thermal pipes with corrugated shock-absorbing devices, and aligning the corresponding flanges of the two sets of the corrugated shock-absorbing devices; S4. Align the bolt holes on the two opposing flanges and fasten the two flanges together using bolts to connect them so that the connecting brackets of the two sets of the corrugated vibration damping devices are pressed into contact with each other; S5. Install the sacrificial anode protection shell in the peripheral area of the flanges of the two sets of the corrugated shock-absorbing devices after fastening and connection, so that a closed anti-corrosion cavity is formed between the inner wall of the protection shell and the outer surface of the device.

6. A thermal pipeline flange connection corrugated vibration damping connection process according to claim 3, characterized in that: In the step S4, by tightening the bolts, the connecting brackets of the two sets of the corrugated shock-absorbing devices are pressed into contact with each other to form an axial force transmission path, and the two sets of the corrugated shock-absorbing bodies constitute a parallel shock-absorbing system.

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