Marine piping system pipe thermal expansion compensation adjusting structure

Abstract

The utility model relates to pipeline thermal expansion compensation adjusting structure technical field, especially disclose a marine piping system pipeline thermal expansion compensation adjusting structure, including bellows pipe body and two flange plates, when pipeline thermal expansion, the synchronous adaptive elastic deformation of the protective elastic cloth outside bellows occurs, can effectively block seawater, moisture, chloride ion, oil stain, dust and other corrosive impurities and interfering impurities contact bellows surface, on one hand avoided the electrochemical corrosion caused by chloride ion and water vapor forming electrolyte solution, on the other hand prevented the problem that oil stain, dust stick in the bellows gap and hinder deformation and accelerate local corrosion, through the efficient protection and anticorrosion effect, the abrasion, corrosion damage rate of bellows is reduced significantly, its elastic displacement compensation capacity can be kept for a long time, effectively avoid the piping failure caused by the rupture of bellows, medium leakage, prolong the service life of bellows compensator, reduce the replacement frequency of compensator.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline thermal expansion compensation and adjustment structure, and in particular to a thermal expansion compensation and adjustment structure for ship piping systems. Background Technology

[0002] Marine piping systems are critical for ensuring a ship's power output, media transport, and equipment cooling. Their operational stability directly impacts navigation safety and operational efficiency. In core piping systems such as fuel lines, steam lines, and cooling water lines, significant axial, lateral, or angular displacements can occur due to fluctuations in the temperature of the transported media (e.g., the temperature difference during steam line startup and shutdown can reach several hundred degrees Celsius) and structural deformation of the hull during navigation. If these displacements cannot be effectively compensated, they can lead to stress concentration, joint cracking, and even overall system failure.

[0003] As the core component for thermal displacement compensation in piping systems, the bellows compensator, with its elastic deformation characteristics, can flexibly absorb multi-directional displacement of the pipeline. It also has the functions of mitigating pipeline vibration and reducing fluid noise. Therefore, it has become an indispensable key component in marine piping systems. Its working principle is to utilize the thin-walled corrugated structure of the bellows wall to undergo elastic deformation when subjected to axial tension, pressure, or lateral and angular forces, thereby offsetting the displacement of the pipeline and maintaining the stress balance of the piping system.

[0004] However, the marine environment in which ships navigate is characterized by high humidity, high salt spray, strong corrosiveness, and a mixture of oil and dust. The bellows of the corrugated compensator are mostly made of stainless steel and other metals. Chloride ions and water vapor in the marine atmosphere will continuously adhere to the surface of the bellows, forming an electrolyte solution and causing electrochemical corrosion. Oil, fuel vapor and dust in the ship's engine room will mix and adhere to the gaps in the bellows, which will not only hinder the elastic deformation of the bellows, but also accelerate the local corrosion process. Under long-term operation, the corrosion of the bellows will lead to the thinning of the pipe wall and damage to the bellows structure. This will not only significantly reduce its elastic displacement compensation capacity and prevent the effective release of pipe system stress, but also cause serious failures such as bellows rupture and media leakage. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a thermal expansion compensation and adjustment structure for ship piping systems. This solves the technical problems of chloride ions and water vapor in the marine atmosphere continuously adhering to the surface of the bellows, forming an electrolyte solution and causing electrochemical corrosion. Oil, fuel vapor, and dust in the ship's engine room mix and adhere to the bellows gaps, hindering the elastic deformation of the bellows and accelerating the local corrosion process. Under long-term operation, the corrosion of the bellows leads to thinning of the pipe wall and damage to the bellows structure, which not only significantly reduces its elastic displacement compensation capacity and prevents the effective release of piping stress, but also causes serious failures such as bellows rupture and media leakage.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The thermal expansion compensation and adjustment structure for ship piping systems includes a corrugated pipe body and two flanges. The two flanges are fixedly connected to both ends of the corrugated pipe body. Two protective components are installed on the outside of the corrugated pipe body. Each protective component includes a protective elastic cloth and a connecting plate. The protective elastic cloth is installed on the outside of the corrugated pipe body. There are two connecting plates, which are fixedly connected to both ends of the protective elastic cloth. Several round holes are opened on the outside of each connecting plate. Two adhesive cloths are placed between the two flanges, and the two ends of the adhesive cloths are attached to the outside of the two protective elastic cloths.

[0008] Preferably, each connecting plate has a locking block fixedly installed at both ends, and each flange has a locking groove on the side corresponding to the locking block, with the locking block engaging inside the locking groove.

[0009] Preferably, each card block has a limiting spring at both ends, and each card block has a deformation groove on one side corresponding to the limiting spring. One end of the limiting spring is fixedly connected to the inside of the deformation groove, and the other end extends outward.

[0010] Preferably, the protective component can also be a protective cloth and two positioning rings, with the two positioning rings fixedly installed at both ends of the corrugated pipe body, and the two ends of the protective cloth pasted to the outside of the positioning rings.

[0011] Preferably, a fixing cloth is pasted on the outside of the protective cloth, and the fixing cloth covers the axial surrounding gap formed by the protective cloth.

[0012] Preferably, the protective elastic fabric, protective fabric, adhesive fabric, and fixing fabric are all neoprene rubber coated nylon elastic fabric or silicone rubber composite elastic fabric. The adhesive fabric is bonded and fixed to the protective elastic fabric with an adhesive, and the protective fabric is fixed to the fixing fabric with an adhesive. The adhesive is weather-resistant elastic polyurethane glue or silicone elastic glue.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] During the operation of a ship's piping system, when the pipeline experiences thermal expansion or contraction due to changes in medium temperature, the pipeline exerts axial tensile or compressive forces on the bellows compensator, causing corresponding elastic deformation. When the pipeline thermally expands, it generates tensile force on the compensator, causing the bellows body to elongate axially. When the pipeline contracts axially, it generates compressive force on the compensator, causing the bellows body to compress axially. During this deformation process, the protective elastic fabric outside the bellows undergoes adaptive elastic deformation simultaneously. When the bellows stretches, the protective elastic fabric stretches accordingly; when the bellows compresses, the protective elastic fabric contracts accordingly, without hindering the compressive deformation of the bellows. Simultaneously, the adhesive fabric is tightly bonded to the two protective elastic fabrics. At the joints of the elastic fabric, the elastic fabric expands and contracts synchronously with the deformation of the protective elastic fabric, maintaining a sealed state at all times. This effectively prevents corrosive and interfering impurities such as seawater, moisture, chloride ions, oil, and dust from contacting the corrugated pipe surface. On the one hand, it avoids electrochemical corrosion caused by the formation of an electrolyte solution by chloride ions and water vapor. On the other hand, it prevents oil and dust from adhering to the corrugated gaps, hindering deformation and accelerating local corrosion. Through efficient protection and corrosion resistance, the wear and corrosion rate of the corrugated pipe is significantly reduced, and its elastic displacement compensation capability is maintained for a long time. This effectively avoids pipeline failures caused by corrugated pipe rupture and media leakage, extends the service life of the corrugated compensator, and reduces the frequency of compensator replacement. Attached Figure Description

[0015] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a structural diagram of the flange of this utility model;

[0018] Figure 3 This is a structural diagram of the protective fabric of this utility model;

[0019] Figure 4 This is a structural diagram of the positioning ring of this utility model.

[0020] Legend: 1. Corrugated pipe body; 2. Flange; 3. Protective elastic cloth; 4. Connecting plate; 5. Round hole; 6. Adhesive cloth; 7. Locking block; 8. Locking groove; 9. Limiting spring; 10. Deformation groove; 11. Protective cloth; 12. Positioning ring; 13. Fixing cloth. Detailed Implementation

[0021] This application provides a thermal expansion compensation and adjustment structure for ship piping systems, effectively solving the technical problems of chloride ions and water vapor in the marine atmosphere continuously adhering to the surface of the bellows, forming an electrolyte solution and causing electrochemical corrosion. Oil, fuel vapor and dust in the ship's engine room mix and adhere to the bellows gaps, hindering the elastic deformation of the bellows and accelerating the local corrosion process. Under long-term operation, the corrosion of the bellows will lead to thinning of the pipe wall and damage to the bellows structure, which will not only significantly reduce its elastic displacement compensation capacity and prevent the effective release of pipeline stress, but also cause serious failures such as bellows rupture and media leakage.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in this application effectively solves the technical problems that chloride ions and water vapor in the marine atmosphere continuously adhere to the surface of the bellows, forming an electrolyte solution and causing electrochemical corrosion. Furthermore, oil, fuel vapor, and dust in the ship's engine room mix and adhere to the bellows gaps, hindering the elastic deformation of the bellows and accelerating the localized corrosion process. Under long-term operation, the corrosion of the bellows leads to thinning of the pipe wall and damage to the bellows structure, significantly reducing its elastic displacement compensation capacity, preventing effective stress release in the piping system, and causing serious malfunctions such as bellows rupture and media leakage. The overall approach is as follows:

[0023] To address the problems existing in the prior art, this utility model provides a thermal expansion compensation and adjustment structure for ship piping systems, including a corrugated pipe body 1 and two flanges 2. The two flanges 2 are respectively fixedly connected to both ends of the corrugated pipe body 1. The corrugated pipe body 1 is the core functional component, which absorbs the axial thermal expansion or cold contraction displacement of the ship piping system caused by changes in medium temperature through elastic deformation, and offsets the axial tensile or compressive stress of the pipeline. This avoids weld cracking, flange leakage, and interface damage caused by thermal stress concentration in the pipeline. It is suitable for the frequent temperature fluctuation conditions of ship piping systems and ensures the safe operation of the pipeline system. The flanges 2 provide bolt connection interfaces with the ship pipeline.

[0024] The corrugated pipe body 1 is equipped with two protective components on its exterior. Each protective component includes a protective elastic cloth 3 and a connecting plate 4. The protective elastic cloth 3 is placed on the exterior of the corrugated pipe body 1. There are two connecting plates 4, which are fixedly connected to the two ends of the protective elastic cloth 3 respectively. Several round holes 5 are opened on the exterior of each connecting plate 4. The protective elastic cloth 3 covers the corrugated pipe and expands and contracts axially synchronously with the corrugated pipe, blocking impurities such as seawater, moisture, dust, and oil, reducing the probability of corrosion and wear of the corrugated pipe, and extending its service life. It elastically adapts to the deformation of the corrugated pipe. The connecting plate 4 corresponds to the flange reserved hole through the round hole 5. When the corrugated pipe compensator is connected to the pipeline, the bolt passes through the flange reserved hole and the round hole 5 of the connecting plate 4 to achieve a stable connection between the compensator, the pipeline and the connecting plate 4.

[0025] Two adhesive cloths 6 are installed between the two flanges 2. The two ends of the adhesive cloths 6 are attached to the outside of the two protective elastic cloths 3. The adhesive cloths 6 are selected from neoprene rubber coated nylon elastic cloth or silicone rubber composite elastic cloth. Weather-resistant elastic polyurethane adhesive or silicone elastic adhesive is preferred. After curing, it can expand and contract synchronously with the cloth.

[0026] Each connecting plate 4 has a locking block 7 fixedly installed at both ends. Each flange 2 has a locking groove 8 on the side corresponding to the locking block 7. The locking block 7 is locked inside the locking groove 8. Each locking block 7 has a limiting spring 9 at both ends. Each locking block 7 has a deformation groove 10 on the side corresponding to the limiting spring 9. One end of the limiting spring 9 is fixedly connected inside the deformation groove 10, and the other end extends outward.

[0027] The connecting plate 4 is fixed to the outside of the flange 2 through the connection between the locking block 7 and the locking groove 8. At the same time, the flange reserved hole and the round hole 5 of the connecting plate 4 correspond one-to-one to facilitate the subsequent bolt connection. When the locking block 7 enters the locking groove 8, the outward extension of the limiting spring 9 moves to the deformation groove 10. When the connecting plate 4 and the flange 2 are in contact, the limiting spring 9 is in contact with the inner wall of the locking groove 8 under its own elasticity, which increases the stability of the connection between the locking block 7 and the locking groove 8.

[0028] The protective components can also be a protective cloth 11 and two positioning rings 12. The two positioning rings 12 are fixedly installed at both ends of the corrugated pipe body 1, and the two ends of the protective cloth 11 are pasted to the outside of the positioning rings 12.

[0029] The protective cloth 11 wraps around the outer periphery of the corrugated pipe, expands and contracts with the corrugated pipe, and blocks corrosive impurities. The positioning ring 12 provides a bonding reference for the protective cloth 11.

[0030] A fixing cloth 13 is pasted on the outside of the protective cloth 11. The fixing cloth 13 is pasted on the axial surrounding gap of the protective cloth 11 and deforms synchronously with the protective cloth 11. The fixing cloth 13 seals the gap and provides reliable protection. When replacing, it can be cut open along one side of the fixing cloth 13 without disassembling the compensator and pipeline connection, reducing maintenance costs and downtime.

[0031] Example 1

[0032] Before connecting the corrugated pipe compensator to the pipeline, place two protective elastic cloths 3 symmetrically on the outside of the corrugated pipe body 1 to ensure that the protective elastic cloths 3 completely cover the corrugated pipe body 1. Then, move the connecting discs 4 at both ends of the protective elastic cloths 3 so that the connecting discs 4 fit against the outside of the flange 2. During this process, the locking blocks 7 on the connecting discs 4 simultaneously enter the corresponding locking grooves 8 on the flange 2. When the locking block 7 enters the slot 8, the inner wall of the slot 8 exerts a squeezing force on the limiting spring 9, forcing the limiting spring 9 to deform into the deformation groove 10 so that the locking block 7 can be smoothly embedded into the slot 8. When the locking block 7 is fully embedded in the slot 8, the limiting spring 9 is tightly fitted to the inner wall of the slot 8 under the action of its own elastic restoring force, thereby achieving the initial limiting and fixing of the connecting plate 4 and the flange 2. After both protective elastic cloths 3 have completed the initial fixing with the flange 2, the ends of the two protective elastic cloths 3 are aligned and fitted together. At this time, two adhesive cloths 6 are respectively pasted at the joint of the two protective elastic cloths 3. The adhesive effect of the adhesive cloths 6 enhances the sealing of the connection of the protective elastic cloths 3.

[0033] After assembling the aforementioned protective structure, connect the bellows compensator to the ship's piping system. At this point, pass the connecting bolts through the pre-drilled holes on flange 2 and the round holes 5 on connecting plate 4, and tighten the nuts to achieve a secure connection between the bellows compensator and the pipeline. The assembly stage is now complete. During the operation of the ship's piping system, when the pipeline experiences thermal expansion or contraction due to changes in medium temperature, the pipeline will exert axial tensile or compressive forces on the bellows compensator, causing it to undergo corresponding elastic deformation. When the pipeline thermally expands, it exerts tensile force on the compensator, causing the bellows body 1 to be axially elongated. When the pipeline coldly contracts, it exerts tensile force on the compensator. Under compression, the bellows body 1 is axially compressed. During this deformation process, the protective elastic cloth 3 on the outside of the bellows undergoes adaptive elastic deformation simultaneously. When the bellows is stretched, the protective elastic cloth 3 is stretched accordingly; when the bellows is compressed, the protective elastic cloth 3 contracts accordingly. This does not hinder the compression deformation of the bellows. At the same time, the adhesive cloth 6 is tightly attached to the joint between the two protective elastic cloths 3, and expands and contracts synchronously with the deformation of the protective elastic cloth 3, always maintaining the seal of the joint. This effectively prevents impurities such as seawater, moisture, dust, and oil from entering the surface of the bellows in the ship's navigation environment, preventing corrosion damage caused by impurities and extending its service life.

[0034] Example 2

[0035] Take a protective cloth 11 that is compatible with the length and circumference of the corrugated pipe body 1. It is preferably a neoprene rubber coated nylon elastic cloth or a silicone rubber composite elastic cloth, which has good elasticity, corrosion resistance and weather resistance. Wrap the protective cloth 11 completely around the outer periphery of the corrugated pipe body 1, so that the two ends of the protective cloth 11 are completely attached to the outer periphery of the two positioning rings 12, ensuring that the protective cloth 11 fully covers the expansion and contraction area of ​​the corrugated pipe body 1, with no exposed parts.

[0036] Then, fix both ends of the protective cloth 11. Use weather-resistant elastic polyurethane adhesive or silicone elastic adhesive as the adhesive. Apply the adhesive evenly along the outer peripheral wall of the positioning ring 12. Press the two ends of the protective cloth 11 together and press them firmly onto the corresponding areas of the positioning ring 12. After pasting, let it stand until the adhesive is completely cured to achieve a sealed fixation between the two ends of the protective cloth 11 and the positioning ring 12. After the protective cloth 11 wraps around the corrugated pipe body 1, it will form an axial surrounding gap. Select a narrow fixing cloth 13 that matches the material of the protective cloth 11. Apply the same adhesive evenly to the surface of the protective cloth 11 on both sides of the surrounding gap. Cover and stick the fixing cloth 13 to the surrounding gap. Press it gradually from one end to the other end to ensure that the fixing cloth 13 and the protective cloth 11 are tightly attached. After the adhesive is cured, the sealing treatment of the surrounding gap is completed. The assembly of the entire protective component is now complete.

[0037] During the operation of the ship's piping system, when the pipeline expands or contracts due to changes in the medium temperature, the pipeline exerts axial tensile or compressive forces on the bellows compensator, causing the bellows body 1 to undergo elastic deformation. During this process, the protective cloth 11 wrapped around the outside, with its good elasticity, stretches or contracts synchronously with the bellows body 1, without hindering the normal expansion and contraction of the bellows. At the same time, the fixing cloth 13 surrounding the gap can expand and contract synchronously with the deformation of the protective cloth 11, always maintaining a sealed state. This can effectively prevent corrosive impurities such as seawater, moisture, dust, and oil in the ship's navigation environment from contacting the surface of the bellows, avoiding corrosion, wear, and other damage to the bellows, ensuring the stable performance of its compensation and adjustment function, and extending its service life.

[0038] When the protective cloth 11 is damaged, the coating peels off, or other damage occurs, and the protective cloth 11 needs to be replaced, use a utility knife to slowly cut along one side of the fixing cloth 13 to peel the fixing cloth 13 off the protective cloth 11. Then apply degreasing agent to the bonding area between the protective cloth 11 and the positioning ring 12. After the adhesive softens, peel both ends of the protective cloth 11 off the positioning ring 12, and then remove the protective cloth 11 from the corrugated pipe body 1. This method is suitable for situations in ship piping systems where the protective cloth 11 is easily worn and needs to be replaced frequently, such as pipe compensators near the deck area or areas prone to seawater spray. This solution can replace the protective cloth 11 without disassembling the corrugated pipe compensator and the pipe connection structure, avoiding the impact on the pipes connected to both ends of the corrugated pipe body 1 and reducing maintenance costs.

[0039] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A thermal expansion compensation and adjustment structure for ship piping systems, comprising a corrugated pipe body (1) and two flanges (2), wherein the two flanges (2) are respectively fixedly connected to both ends of the corrugated pipe body (1), characterized in that, The corrugated pipe body (1) is provided with two protective components on the outside. Each protective component includes a protective elastic cloth (3) and a connecting plate (4). The protective elastic cloth (3) is provided on the outside of the corrugated pipe body (1). There are two connecting plates (4). The two connecting plates (4) are fixedly connected to the two ends of the protective elastic cloth (3). Each connecting plate (4) has several round holes (5) on its outside. Two adhesive cloths (6) are provided between the two flanges (2), and the two ends of the adhesive cloths (6) are attached to the outside of the two protective elastic cloths (3).

2. The ship piping system thermal expansion compensation and adjustment structure as described in claim 1, characterized in that, Each of the connecting discs (4) is fixedly installed with a locking block (7) at both ends, and each flange (2) has a locking groove (8) on one side corresponding to the locking block (7); The card block (7) is engaged inside the card slot (8).

3. The ship piping system thermal expansion compensation and adjustment structure as described in claim 2, characterized in that, Each of the card blocks (7) is provided with limit springs (9) at both ends.

4. The ship piping system thermal expansion compensation and adjustment structure as described in claim 2, characterized in that, Each of the card blocks (7) has a deformation groove (10) on one side of the corresponding limiting spring (9). One end of the limiting spring (9) is fixedly connected to the inside of the deformation groove (10), and the other end extends outward.

5. The ship piping system thermal expansion compensation and adjustment structure as described in claim 1, characterized in that, The protective component can also be a protective cloth (11) and two positioning rings (12). The two positioning rings (12) are fixedly installed at both ends of the corrugated pipe body (1), and the two ends of the protective cloth (11) are pasted to the outside of the positioning rings (12).

6. The ship piping system thermal expansion compensation and adjustment structure as described in claim 5, characterized in that, A fixing cloth (13) is pasted on the outside of the protective cloth (11). Among them, the fixed cloth (13) covers the protective cloth (11) to form an axial surrounding gap.

7. The ship piping system thermal expansion compensation and adjustment structure as described in claim 1, characterized in that, The protective elastic cloth (3), protective cloth (11), adhesive cloth (6), and fixing cloth (13) are all neoprene rubber coated nylon elastic cloth or silicone rubber composite elastic cloth.

8. The thermal expansion compensation and adjustment structure for ship piping systems as described in claim 1, characterized in that, The adhesive cloth (6) and the protective elastic cloth (3) are bonded and fixed together by adhesive, and the protective cloth (11) and the fixing cloth (13) are fixed together by adhesive.

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