Marine natural gas expansion joint with anti-fatigue function

Abstract

The utility model discloses a marine natural gas expansion joint with an anti-fatigue function, and relates to the technical field of expansion joints, the marine natural gas expansion joint comprises a transverse pipe, a connecting assembly is arranged in the transverse pipe, stretching assemblies are arranged at the two ends of the connecting assembly, and an attaching assembly is arranged at one end of each stretching assembly; the connecting assembly comprises a corrugated pipe fixedly installed in the transverse pipe, sleeves are fixedly installed at the two ends of the corrugated pipe, the attaching assembly comprises a limiting ring communicating with one end of each sleeve, and an annular groove is formed in one side of each limiting ring. According to the marine natural gas expansion joint with the anti-fatigue function, the stretching assembly and the attaching assembly are arranged, in the using process, when a pipeline is impacted by sea waves, the expansion joint can deform and have the anti-fatigue function at the same time, the connecting position cannot be loosened in the using process, and the service life of the expansion joint is prolonged. The sealing performance of the joint of the expansion joint is improved, and meanwhile normal use of the expansion joint is facilitated.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of expansion joints, in particular to a marine natural gas expansion joint with fatigue resistance. BACKGROUND

[0002] An expansion joint is a flexible structure arranged on a container shell or a pipeline to compensate for additional stress caused by displacement of rigid connections and mechanical vibration due to temperature difference. The expansion joint is also commonly known as a compensator or an expansion joint. It is composed of a working main body (an elastic element) and accessories such as end pipes, supports, flanges, conduits and the like. The expansion joint is a flexible structure arranged on a container shell or a pipeline to compensate for additional stress caused by displacement of rigid connections and mechanical vibration due to temperature difference. The effective expansion and deformation of the working main body corrugated pipe are used to absorb the size changes of pipelines, conduits, containers and the like caused by thermal expansion and cold shrinkage, or to compensate for the axial, lateral and angular displacement of pipelines, conduits, containers and the like. It can also be used for noise reduction and vibration reduction. In heat supply, in order to prevent the deformation or damage of the pipeline due to thermal stretching or temperature stress when the heating pipeline is heated, a compensator needs to be arranged on the pipeline to compensate for the thermal elongation of the pipeline, thereby reducing the stress on the pipeline wall and the force acting on the valve or support structure.

[0003] The patent document with the publication number CN219102353U discloses an expansion joint with fatigue resistance for an engine, which comprises a pipe body, both ends of the outer surface of the pipe body are fixedly connected with expansion joints, and one side of the outer surface of the expansion joint is fixedly connected with a protective sleeve. The expansion joint with fatigue resistance for an engine avoids the accumulation of deformation in all wavelengths in one direction through the expansion joint, the protective sleeve, the screw rod, the stud and the spring, can separate the deformation into two wave bands, prevents the problem of excessive local stress of the expansion joint, reduces the radial deformation of the two end parts of the expansion joint through the protective sleeve, effectively prevents fatigue failure of the two end parts of the expansion joint, rotates the stud to make the screw rod drive the two sides of the expansion joint to move and extend, the spring plays an axial buffering role, avoids excessive compression of the expansion joint, plays a pipeline compensation role, avoids damage of the expansion joint caused by excessive tensile instantaneous impact, and improves the tensile performance and use durability.

[0004] Although the above-mentioned application avoids damage of the expansion joint caused by excessive tensile instantaneous impact in use, in actual use, since it is used in marine natural gas transmission, if it does not have fatigue resistance, the expansion joint will be damaged during long-term use, thereby causing leakage of the pipeline and affecting normal use of the expansion joint. UTILITY MODEL CONTENT

[0005] The application discloses a marine natural gas expansion joint with fatigue resistance, which aims to solve the technical problems in the background art.

[0006] To achieve the above object, the application adopts the following technical scheme:

[0007] A marine natural gas expansion joint with anti-fatigue function, comprising a cross pipe, a connecting assembly is arranged inside the cross pipe, stretch assemblies are arranged at both ends of the connecting assembly, and a fitting assembly is arranged at one end of the stretch assembly.

[0008] The connecting assembly comprises a corrugated pipe fixedly installed inside the cross pipe, and sleeve pipes are fixedly installed at both ends of the corrugated pipe.

[0009] The fitting assembly comprises a limiting ring communicated at one end of the sleeve pipe, an annular groove is formed in one side of the limiting ring, a buffer spring is fixedly installed at one side of the annular groove, a sealing ring is fixedly installed at one end of the buffer spring, and an annular positioning groove is formed in one side of the sealing ring.

[0010] The stretch assembly comprises a threaded rod inserted into two limiting rings, and a nut is threadedly connected to the surface of the threaded rod.

[0011] Through the arrangement of the stretch assembly and the fitting assembly, when the pipeline is impacted by sea waves during use, the expansion joint can be deformed while having the anti-fatigue function, the connection part will not be loose during use, the sealing property of the connection part of the expansion joint is improved, and the normal use of the expansion joint is facilitated.

[0012] Optionally, the surface of the corrugated pipe is fixedly connected with the inner wall of the cross pipe, the surface of the sleeve pipe is slidingly connected with the inner wall of the cross pipe, and the sleeve pipe is adapted to the cross pipe.

[0013] Through the arrangement of the sleeve pipe and the cross pipe, the movement stability of the sleeve pipe is improved during use, the abnormal sound generated by the sleeve pipe during movement is avoided, and the surface abrasion of the sleeve pipe is also avoided.

[0014] Optionally, the surface and the inner ring of the sealing ring are slidingly connected with the inner wall of the annular groove on both sides, the sealing ring is adapted to the annular groove, and the sealing ring is made of rubber.

[0015] Optionally, a hexagonal stopper is fixedly installed at one end of the threaded rod, the hexagonal stopper is attached to one side of the limiting ring, a non-slip ring is sleeved on the surface of the threaded rod, one side of the non-slip ring is attached to one side of the nut, the other side of the non-slip ring is attached to one side of the limiting ring, a rod hole is formed in the limiting ring for the threaded rod to pass through, and the inner wall of the rod hole is slidingly connected with the surface of the threaded rod.

[0016] Through the arrangement of the hexagonal stopper, the threaded rod is conveniently shielded during use, the non-slip ring is arranged, the anti-slip effect of the expansion joint connection is achieved during use, and the connection stability of the expansion joint is maintained.

[0017] Optionally, a flange hole is formed on one side of the limiting ring, and an extrusion ring is fixedly installed on one side of the limiting ring, and an anti-skid pattern is formed on one side of the extrusion ring, and the flange hole is located between the extrusion ring and the sealing ring.

[0018] By adopting the above technical scheme, through the setting of the extrusion ring, the extrusion operation is facilitated when the pipeline is connected, thereby improving the connection sealing performance of the expansion joint.

[0019] Optionally, the inside of the cross pipe is provided with a protection assembly, which includes an elastic pipe, a pressure-resistant pipe and a corrosion-resistant pipe arranged in the cross pipe.

[0020] By adopting the above technical scheme, through the setting of the elastic pipe, the deformation of the cross pipe as a whole cannot be restored, the integrity of the cross pipe as a whole is maintained, the pressure-resistant pipe is provided, the pressure-bearing capacity of the expansion joint is increased, the damage phenomenon caused by pressure is reduced, the corrosion-resistant pipe is provided, the expansion joint is prevented from being affected by seawater and natural gas corrosion, and the service life of the expansion joint is improved.

[0021] Optionally, the surface of the elastic pipe is fixedly connected with the inner wall of the cross pipe, the inner wall of the cross pipe is attached to the surface of the elastic pipe, the surface of the pressure-resistant pipe is fixedly connected with the inner wall of the elastic pipe, and the surface of the corrosion-resistant pipe is attached to the inner wall of the pressure-resistant pipe.

[0022] By adopting the above technical scheme, through the setting of the connection assembly and the protection assembly, the expansion joint can be protected during use, which prevents the expansion joint from being eroded by external force or seawater for a long time, and prolongs the service life of the expansion joint.

[0023] Optionally, the number of threaded rods is five, and the five threaded rods are distributed equidistantly on the limiting ring in a circumferential array.

[0024] By adopting the above technical scheme, through the setting of the five threaded rods, the different positions of the limiting ring can be reinforced, thereby facilitating the stretching reset operation, maintaining the use stability of the expansion joint, and prolonging the service life of the expansion joint.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. Through the setting of the stretching assembly and the attachment assembly, when the pipeline is impacted by waves during use, the expansion joint can be deformed while having fatigue resistance, the connection part will not be loose during use, the sealing performance of the connection part of the expansion joint is improved, and the normal use of the expansion joint is facilitated.

[0027] 2. Through the setting of the connecting assembly and the protection assembly, the expansion joint can be protected during use, avoiding external force or seawater erosion of the expansion joint during long-term use, thereby prolonging the service life of the expansion joint. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a three-dimensional structure schematic diagram of the present application.

[0029] Figure 2 It is a three-dimensional structure schematic diagram of the present application.

[0030] Figure 3 It is a three-dimensional structure schematic diagram of the present application.

[0031] Figure 4 It is a three-dimensional structure schematic diagram of the present application.

[0032] Figure 5 It is a three-dimensional structure schematic diagram of the present application. Figure 1 It is an enlarged schematic diagram of structure A in the present application.

[0033] In the drawings: 1, cross pipe; 2, connecting assembly; 200, corrugated pipe; 201, sleeve; 3, stretching assembly; 300, threaded rod; 301, nut; 302, anti-skid ring; 4, fitting assembly; 400, limiting ring; 401, buffer spring; 402, sealing ring; 403, extrusion ring; 5, protection assembly; 500, elastic pipe; 501, pressure-resistant pipe; 502, anti-corrosion pipe. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying drawings. Figures 1-5 The present application will be further described in detail.

[0035] The embodiment of the present application discloses a marine natural gas expansion joint with anti-fatigue function. Referring to Figures 1-5 , comprising a cross pipe 1, the inside of the cross pipe 1 is provided with a connecting assembly 2, both ends of the connecting assembly 2 are provided with a stretching assembly 3, one end of the stretching assembly 3 is provided with a fitting assembly 4.

[0036] Referring to Figure 1 , the connecting assembly 2 comprises a corrugated pipe 200 fixedly installed in the cross pipe 1, both ends of the corrugated pipe 200 are fixedly installed with sleeves 201, the surface of the corrugated pipe 200 is fixedly connected with the inner wall of the cross pipe 1, and the surface of the sleeve 201 is slidingly connected with the inner wall of the cross pipe 1, the sleeve 201 is adapted to the cross pipe 1, the sleeve 201 adapted to the cross pipe 1 is set, which increases the stability of the sleeve 201 during use, avoiding abnormal noise during the movement of the sleeve 201, and also avoiding the surface wear of the sleeve 201.

[0037] Referring to Figure 2 , Figure 3The fitting assembly 4 comprises a limiting ring 400 communicated with one end of the sleeve 201, an annular groove is formed on one side of the limiting ring 400, a buffer spring 401 is fixedly installed on one side of the annular groove, one end of the buffer spring 401 is fixedly installed with a sealing ring 402, an annular positioning groove is formed on one side of the sealing ring 402, the surface and the inner ring of the sealing ring 402 are slidably connected with the inner walls of the annular groove, and the sealing ring 402 is matched with the annular groove, and the sealing ring 402 is made of rubber, a flange hole is formed on one side of the limiting ring 400, an extrusion ring 403 is fixedly installed on one side of the limiting ring 400, anti-skid lines are formed on one side of the extrusion ring 403, and the flange hole is located between the extrusion ring 403 and the sealing ring 402. The extrusion ring 403 is arranged, which facilitates extrusion operation during pipeline connection, thereby improving the connection sealing property of the expansion joint.

[0038] With reference to Figure 5 The stretching assembly 3 comprises two limiting rings 400, threaded rods 300 are inserted into the limiting rings 400, nuts 301 are threadedly connected to the surfaces of the threaded rods 300, hexagonal blocks are fixedly installed at one ends of the threaded rods 300, one side of the hexagonal blocks is attached to one side of the limiting ring 400, anti-skid rings 302 are sleeved on the surfaces of the threaded rods 300, one side of the anti-skid ring 302 is attached to one side of the nut 301, the other side of the anti-skid ring 302 is attached to one side of the limiting ring 400, rod holes are formed in the limiting rings 400 for the threaded rods 300 to pass through, and the inner walls of the rod holes are slidably connected with the surfaces of the threaded rods 300. The hexagonal blocks are arranged, which facilitates the shielding effect of the threaded rods 300 during use. Meanwhile, the anti-skid ring 302 is arranged, which realizes the anti-skid effect of the expansion joint connection during use, maintains the connection stability of the expansion joint, the number of the threaded rods 300 is five, and the five threaded rods 300 are equidistantly distributed on the limiting ring 400 in a circumferential array. The number of the threaded rods 300 is five, which can reinforce different positions of the limiting ring 400, thereby facilitating the stretching reset operation, maintaining the use stability of the expansion joint, and prolonging the service life of the expansion joint.

[0039] The stretching assembly 3 and the fitting assembly 4 are arranged, which can make the expansion joint have the anti-fatigue function while deforming when the pipeline is impacted by sea waves during use, and will not cause the connection to be loose during use, thereby increasing the sealing property of the expansion joint connection and facilitating the normal use of the expansion joint.

[0040] With reference to Figure 4The inside of the transverse pipe 1 is provided with a protection assembly 5, which comprises an elastic pipe 500, a pressure-resistant pipe 501 and a corrosion-resistant pipe 502 arranged in the transverse pipe 1. The elastic pipe 500 arranged in the transverse pipe 1 can avoid the deformation of the transverse pipe 1 and restore the integrity of the transverse pipe 1. The pressure-resistant pipe 501 can increase the pressure-bearing capacity of the expansion joint and reduce the damage caused by pressure. The corrosion-resistant pipe 502 can avoid the corrosion of the expansion joint by seawater and natural gas, thereby prolonging the service life of the expansion joint. The surface of the elastic pipe 500 is fixedly connected with the inner wall of the transverse pipe 1, and the inner wall of the transverse pipe 1 is attached to the surface of the elastic pipe 500. The surface of the pressure-resistant pipe 501 is fixedly connected with the inner wall of the elastic pipe 500, and the surface of the corrosion-resistant pipe 502 is attached to the inner wall of the pressure-resistant pipe 501. The connection assembly 2 and the protection assembly 5 can protect the expansion joint during use, avoid the expansion joint from being eroded by external force or seawater during long-term use, and prolong the service life of the expansion joint.

[0041] The implementation principle of the marine natural gas expansion joint with the anti-fatigue function is that the expansion joint is connected with the pipeline through the flange hole on the limiting ring 400 during use, then one side of the pipeline is attached to one side of the sealing ring 402, the buffer spring 401 resets and extrudes the sealing ring 402, so that the pipeline opening is attached, and then the nut 301 is tightened to position and extrude the limiting ring 400 on both sides. When the expansion joint is subjected to pressure inside or outside, the expansion joint can expand and contract in the transverse range, and the surface of the expansion joint also deforms, thereby protecting the expansion joint. The connection assembly 2 and the protection assembly 5 can protect the expansion joint during use, avoid the expansion joint from being eroded by external force or seawater during long-term use, and prolong the service life of the expansion joint.

[0042] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A marine natural gas expansion joint with anti-fatigue function, comprising a cross pipe (1), characterized in that: The inside of the transverse pipe (1) is provided with a connecting assembly (2), both ends of the connecting assembly (2) are provided with a stretching assembly (3), one end of the stretching assembly (3) is provided with a fitting assembly (4); The connecting assembly (2) comprises a bellows (200) fixedly installed inside the transverse pipe (1), both ends of the bellows (200) are fixedly installed with a sleeve (201); The fitting assembly (4) comprises a limiting ring (400) communicated at one end of the sleeve (201), one side of the limiting ring (400) is provided with an annular groove, one side of the annular groove is fixedly installed with a buffer spring (401), one end of the buffer spring (401) is fixedly installed with a sealing ring (402), one side of the sealing ring (402) is provided with an annular positioning groove; The stretching assembly (3) comprises two limiting rings (400) inserted with a threaded rod (300), the surface of the threaded rod (300) is threadedly connected with a nut (301).

2. The marine natural gas expansion joint with anti-fatigue function according to claim 1, characterized in that: The surface of the bellows (200) is fixedly connected with the inner wall of the transverse pipe (1), and the surface of the sleeve (201) is slidingly connected with the inner wall of the transverse pipe (1), and the sleeve (201) is matched with the transverse pipe (1).

3. The marine natural gas expansion joint with anti-fatigue function according to claim 1, characterized in that: The surface and the inner ring of the sealing ring (402) are respectively slidingly connected with the inner wall of the annular groove, and the sealing ring (402) is matched with the annular groove, and the sealing ring (402) is made of rubber.

4. The marine natural gas expansion joint with anti-fatigue function according to claim 1, characterized in that: One end of the threaded rod (300) is fixedly installed with a hexagonal stop block, one side of the hexagonal stop block is matched with one side of the limiting ring (400), the surface of the threaded rod (300) is sleeved with an anti-skid ring (302), one side of the anti-skid ring (302) is matched with one side of the nut (301), the other side of the anti-skid ring (302) is matched with one side of the limiting ring (400), a rod hole is formed in the limiting ring (400) for the threaded rod (300) to pass through, and the inner wall of the rod hole is slidingly connected with the surface of the threaded rod (300).

5. The marine natural gas expansion joint with anti-fatigue function according to claim 1, characterized in that: One side of the limiting ring (400) is provided with a flange hole, one side of the limiting ring (400) is fixedly installed with an extrusion ring (403), one side of the extrusion ring (403) is provided with an anti-skid pattern, and the flange hole is located between the extrusion ring (403) and the sealing ring (402).

6. The marine natural gas expansion joint with anti-fatigue function according to claim 1, characterized in that: The inside of the transverse pipe (1) is provided with a protection assembly (5), the protection assembly (5) comprises an elastic tube (500), a pressure-resistant tube (501) and a corrosion-resistant tube (502) arranged in the transverse pipe (1).

7. The marine natural gas expansion joint with anti-fatigue function according to claim 6, characterized in that: The surface of the elastic tube (500) is fixedly connected with the inner wall of the transverse pipe (1), and the inner wall of the transverse pipe (1) is matched with the surface of the elastic tube (500), the surface of the pressure-resistant tube (501) is fixedly connected with the inner wall of the elastic tube (500), and the surface of the corrosion-resistant tube (502) is matched with the inner wall of the pressure-resistant tube (501).

8. The marine natural gas expansion joint with anti-fatigue function according to claim 1, characterized in that: The number of the threaded rods (300) is five, and the five threaded rods (300) are distributed equidistantly on the limiting ring (400) in a circumferential array.

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