Elastic support structure for a marine gas double-wall pipe

Abstract

The utility model discloses a marine gas double -walled pipe elastic support structure relates to shipbuilding technical field, including a plurality of interval arrangement set up in the elastic support unit between gas double -walled pipe inner tube and outer tube, elastic support unit includes support pipe, elastic gasket and clamping part, and support pipe, elastic gasket and clamping part are in the annular space of outer tube and inner tube and are set gradually from outside to inside along the radial direction, wherein, the outer wall of support pipe is in abutment on the inner wall of outer tube, and clamping part is annularly clamped to the outside of inner tube, and a plurality of support columns are arranged on the outer wall of the side away from inner tube of clamping part, and elastic gasket is set up between support column and the inner wall of support pipe, and the inside and outside of elastic gasket are respectively in abutment with the inner wall of support pipe, support column, as double -walled pipe support structure has good damping effect.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding technology, and in particular to an elastic support structure for marine gas double-wall pipes. Background Technology

[0002] Liquefied natural gas (LNG) and ethane, due to their low-carbon characteristics, have become the mainstream choice for dual-fuel engines in ships. However, these gases pose a risk of flammability and explosion. The International Maritime Organization's IGC Code and major classification societies mandate that gas transmission pipelines in the engine room must adopt a double-walled pipe structure. This means that the inner pipe transports fuel, while the outer pipe cavity is filled with positive-pressure inert gas or air to form a leakage barrier to prevent the escape of flammable gases. The inner and outer pipes are connected by a supporting structure.

[0003] There are various forms of existing double-walled tube support structures. Current technologies include: Utility model patent CN215060170U discloses a fixed support structure that connects to the double-walled tube via welding, offering high support strength but unsuitable for low-temperature media, requiring high welding quality, and with no relative displacement between the inner and outer tubes; Utility model patent CN205298866U discloses an S-shaped support structure, which is easy to install without welding, but suffers from a large contact area between the support arm and the inner wall of the tube, leading to cold leakage, and the support wall is prone to fatigue failure under prolonged vibration of the double-walled tube; Invention patent CN116221511A discloses an elastic support structure that can withstand prolonged vibration and is less prone to fatigue failure, but its complex structure and high requirement for coaxiality between the inner and outer tubes make installation difficult. Utility Model Content

[0004] The purpose of this utility model is to provide an elastic support structure for marine gas double-walled pipes to solve the problems existing in the prior art. Its structure is reasonable, easy to assemble and disassemble, and has a good vibration reduction effect as a double-walled pipe support structure.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides an elastic support structure for a marine gas double-wall pipe, comprising a plurality of elastic support units arranged at intervals between the inner and outer pipes of the gas double-wall pipe; each elastic support unit includes a support pipe, an elastic gasket, and a clamping part, which are arranged radially from the outside to the inside within the circumferential space formed by the outer pipe and the inner pipe; wherein, the outer wall of the support pipe abuts against the inner wall of the outer pipe, the clamping part is circumferentially clamped to the outside of the inner pipe, a plurality of support columns are provided on the outer wall of the clamping part away from the inner pipe, the elastic gasket is disposed between the support column and the inner wall of the support pipe, and the inner and outer sides of the elastic gasket are respectively abutted against the inner wall of the support pipe and the support column.

[0006] In some embodiments, the clamping part includes a first semi-ring clamping plate, a second semi-ring clamping plate, and fixing bolts. The first semi-ring clamping plate and the second semi-ring clamping plate are clamped relative to each other on the outside of the inner tube. Connecting plates are provided on both sides of the annular plate of the first semi-ring clamping plate and the second semi-ring clamping plate. The connecting plates of the first semi-ring clamping plate and the second semi-ring clamping plate are connected by fixing bolts.

[0007] In some embodiments, at least three support columns are provided on the outer walls of both the first and second semi-ring clamps.

[0008] In some embodiments, an elastic gasket is provided between each of the support columns and the inner wall of the support tube.

[0009] In some embodiments, the outer wall of the elastic gasket is an arcuate surface that conforms to the contour of the inner wall of the support tube.

[0010] In some embodiments, the inner wall of the elastic gasket is in surface contact with the support column.

[0011] In some embodiments, the support column and the first semi-ring clamp, as well as the support column and the second semi-ring clamp, are all integrally formed structures.

[0012] In some embodiments, the elastic gasket is a polytetrafluoroethylene gasket.

[0013] In some embodiments, the elastic gaskets are evenly distributed circumferentially around the central axis of the inner tube.

[0014] In some embodiments, the wall of the support tube is longitudinally broken to form two symmetrical breaks, and a clamping groove is provided at each of the two breaks in opposite directions. An elastic rubber block is clamped in the clamping groove, and a clamping mounting hole is also provided on the support tube near the two sides of the breaks.

[0015] The present invention achieves the following technical advantages over the prior art: The elastic support structure for marine gas double-wall pipes in this invention utilizes the elasticity of the supporting pipe, PTFE gasket, clamping part, fixing bolts, and elastic rubber block to achieve an elastic connection between the inner and outer pipes. This buffers vibrations between the inner and outer pipes in all radial directions. The clamping part holds the inner pipe in place, while the supporting pipe abuts against the outer pipe. The structure is simple and easy to operate. It also avoids the damage to the inner and outer pipes caused by welding in traditional fixed supports, reducing installation workload. Furthermore, the elastic support structure can reduce elastic deformation caused by vibration and temperature. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the distribution structure of the elastic support structure for marine gas double-walled pipe in this utility model within the double-walled pipe; Figure 2 This is a schematic diagram of the elastic support structure for the double-walled marine gas pipe in this utility model; In the diagram: 101, inner tube; 102, outer tube; 103, elastic support unit; 100, support tube; 110, break; 120, clamping mounting hole; 200, gasket; 300, clamping part; 310, first half-ring clamping plate; 320, second half-ring clamping plate; 330, support column; 340, connecting plate; 400, fixing bolt; 500, elastic rubber block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The purpose of this invention is to provide an elastic support structure for marine gas double-wall pipes to solve the problems existing in the prior art.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] The elastic support structure for marine gas double-walled pipes in this embodiment, such as Figures 1-2As shown, the system includes several elastic support units 103 spaced apart between the inner pipe 101 and the outer pipe 102 of the gas double-walled pipe. Each elastic support unit 103 includes a support pipe 100, an elastic gasket 200, and a clamping part 300. The support pipe 100, elastic gasket 200, and clamping part 300 are arranged radially from the outside to the inside within the circumferential space formed by the outer pipe 102 and the inner pipe 101. The outer wall of the support pipe 100 abuts against the outer pipe 102. On the inner wall, the clamping part 300 is circumferentially clamped to the outside of the inner tube 101. On the outer wall of the clamping part 300 away from the inner tube 101, a plurality of support columns 320 and second semi-ring clamps 330 are provided. Elastic gaskets 200 are provided between the support columns 320, second semi-ring clamps 330 and the inner wall of the support tube 100, and the inner and outer sides of the elastic gaskets 200 are respectively in contact with the inner wall of the support tube 100 and the support columns 320 and second semi-ring clamps 330.

[0022] During vibration reduction, the inner tube 101 vibrates relative to the outer tube 102. The elastic pad 200 surrounding the outer wall of the inner tube 101 and the support tube 100 installed on the inner wall of the outer tube 102 buffer the relative movement between the inner tube 101 and the outer tube 102, thereby achieving the vibration reduction effect. Compared with the case where only the clamping part 300 is used for vibration reduction, the provision of the elastic pad 200 increases the contact area between the clamping part 300 and the support tube 100, thereby making the support tube 100 and the inner tube 101 more stable as a whole. Moreover, the clamping part 300 is fastened to the outer wall of the inner tube 101, and together with the elastic pad 200 and the support tube 100, it serves to separate the inner tube 101 and the outer tube 102 by a set distance. The compressed support tube 100 can buffer the vibration of the inner tube 101 and the outer tube 102, and can keep the inner tube 101 and the outer tube 102 at the set distance after vibration. Furthermore, the support tube 100 that abuts against the inner wall of the outer tube 102 increases the contact area between the elastic support structure and the inner wall of the outer tube 102 compared to the case where only the clamping part 300 is provided for vibration damping. This is beneficial to further improve the stability of the elastic support structure abutting between the inner tube 101 and the outer tube 102. The columnar support structure provided with multiple clamping parts 300 surrounding the inner tube 101 can buffer the vibration of the inner tube 101 in all radial directions.

[0023] In some embodiments, the clamping part 300 includes a first semi-ring clamping plate 310, a second semi-ring clamping plate, and a fixing bolt 400. The first semi-ring clamping plate 310 and the second semi-ring clamp are clamped relative to each other on the outside of the inner tube 101. Connecting plates 340 are provided on both sides of the annular plates of the first semi-ring clamping plate 310 and the second semi-ring clamping plate. The connecting plates 340 of the first semi-ring clamping plate 310 and the second semi-ring clamping plate are connected by the fixing bolt 400, and a clamping gap is provided between the connecting plates 340 of the first semi-ring clamping plate 310 and the second semi-ring clamping plate. When the fixing bolt 400 is used to connect the first semi-ring clamping plate 310 and the second semi-ring clamping plate, the clamping gap helps to reserve a tightening allowance for the tight connection of the first semi-ring clamping plate 310 and the second semi-ring clamping plate, thereby enabling the fixing bolt 400 to connect the first semi-ring clamping plate 310 and the second semi-ring clamping plate more tightly, which helps to improve the stability of the overall support structure.

[0024] In some embodiments, at least three support columns 320 and 330 are provided on the outer walls of both the first semi-ring clamp 310 and the second semi-ring clamp 330. An elastic gasket 200 is provided between each support column 320 / 230 and the inner wall of the support tube 100. That is, at least six elastic gaskets 200 are provided. Six elastic gaskets 200 can reduce the vibration of the inner tube 101 in various radial directions, enhancing the stability of the overall support structure. Furthermore, support with seven or more elastic gaskets 200 provides greater stability than support with only six.

[0025] In some embodiments, the outer wall of the elastic gasket 200 is an arc-shaped surface that matches the contour of the inner wall of the support tube 100, so as to increase the contact area and ensure stability.

[0026] In some embodiments, the inner wall of the elastic gasket 200 is in surface contact with the support column 320 and the second semi-ring clamp 330. Surface contact can maximize the contact area between the support column 320, the second semi-ring clamp 330 and the elastic gasket 200, avoid wear caused by stress concentration, and help to further improve the support stability of the overall structure.

[0027] In some embodiments, the support column 320, the second semi-ring clamping plate 330, the first semi-ring clamping plate 310, the support column 320, the second semi-ring clamping plate 330, and the second semi-ring clamping plate are all integrally formed structures.

[0028] In some embodiments, the elastic gasket 200 is a polytetrafluoroethylene gasket 200, which has a certain degree of flexibility and compression resilience, and can adapt to the slight unevenness of the sealing surface, so that it fits tightly after installation.

[0029] In some embodiments, the elastic gaskets 200 are evenly distributed circumferentially around the central axis of the inner tube 101, which can make the supporting force borne by the inner tube 101 more uniform.

[0030] In some embodiments, the wall of the support tube 100 is longitudinally broken to form two symmetrical breaks 110. Each break 110 has a clamping groove facing opposite directions, and an elastic rubber block 500 is clamped within the clamping groove. Clamping mounting holes 120 are also provided on the support tube 100 near both sides of the breaks 110. During installation, a clamping tool clamps the elastic rubber block 500 through the clamping mounting holes 120, making the outer diameter of the support tube 100 slightly smaller than the inner diameter of the outer tube 102. After inserting the outer tube 102, releasing the clamping tool automatically tightens the tube. During relative vibration between the inner tube 101 and the outer tube 102, the elastic rubber block 500 releases some of the impact, reducing the internal force on the support tube 100 and extending its service life. Simultaneously, it helps prevent the support tube 100 from shifting, thus improving structural stability.

[0031] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A marine gas double-walled pipe elastic support structure, characterized in that: The system includes several elastic support units arranged at intervals between the inner and outer pipes of a gas double-walled pipe. Each elastic support unit includes a support tube, an elastic gasket, and a clamping part. The support tube, elastic gasket, and clamping part are arranged radially from the outside to the inside within the circumferential space formed by the outer pipe and the inner pipe. The outer wall of the support tube abuts against the inner wall of the outer pipe, and the clamping part is circumferentially clamped to the outside of the inner pipe. Multiple support columns are provided on the outer wall of the clamping part away from the inner pipe. The elastic gasket is disposed between the support column and the inner wall of the support tube, and the inner and outer sides of the elastic gasket are respectively abutted against the inner wall of the support tube and the support column.

2. The marine gas double-wall pipe elastic support structure according to claim 1, characterized in that: The clamping part includes a first half-ring clamping plate, a second half-ring clamping plate, and fixing bolts. The first half-ring clamping plate and the second half-ring clamping plate are clamped relative to each other on the outside of the inner tube. Connecting plates are provided on both sides of the annular plate of the first half-ring clamping plate and the second half-ring clamping plate. The connecting plates of the first half-ring clamping plate and the second half-ring clamping plate are connected by fixing bolts.

3. The marine gas double-wall pipe elastic support structure according to claim 2, characterized in that: At least three support columns are provided on the outer walls of both the first and second semi-ring clamps.

4. The marine gas double-wall pipe elastic support structure according to claim 3, characterized in that: An elastic gasket is provided between each of the support columns and the inner wall of the support tube.

5. The marine gas double-wall pipe elastic support structure according to claim 4, characterized in that: The outer wall of the elastic pad is an arc-shaped surface that matches the contour of the inner wall of the support tube.

6. The marine gas double-wall pipe elastic support structure according to claim 4, characterized in that: The inner wall of the elastic gasket is in surface contact with the support column.

7. The marine gas double-wall pipe elastic support structure according to claim 2, characterized in that: The support column and the first semi-ring clamp, as well as the support column and the second semi-ring clamp, are all integrally formed structures.

8. The marine gas double-wall pipe elastic support structure according to claim 1, characterized in that: The elastic gasket is a polytetrafluoroethylene gasket.

9. The marine gas double-wall pipe elastic support structure according to claim 1, characterized in that: The elastic gaskets are evenly distributed circumferentially around the central axis of the inner tube.

10. The marine gas double-wall pipe elastic support structure according to claim 1, characterized in that: The wall of the support tube is longitudinally broken to form two symmetrical breaks. Each of the two breaks has a clamping groove facing opposite directions. An elastic rubber block is clamped in the clamping groove. The support tube also has clamping mounting holes near the two sides of the breaks.

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