Composite pipe isolation system

Abstract

The present application relates to the technical field of pipeline vibration isolation, and especially relates to a composite pipeline vibration isolation system, which is connected with a pipeline and a foundation and arranged between the foundation and the pipeline during use, and comprises an elastic body arranged on the pipeline and attached to the pipeline, a slide plate support arranged on the foundation, a vibration isolator arranged on a side of the elastic body close to the foundation, a side of the slide plate support close to the pipeline and movably connected with the slide plate support, and a first damper connecting the pipeline and the foundation; wherein a second damper is arranged at an inner central position of the vibration isolator, and a third damper is arranged at an end of the vibration isolator; and the first damper is arranged on both sides of the vibration isolator along the length direction of the pipeline. The vibration isolation system of the present application is suitable for both horizontal pipelines and vertical pipelines, and the multiple energy dissipation of the whole system greatly weakens the damage of earthquakes to the pipelines and strengthens the anti-seismic capacity of the pipelines, so as to ensure the normal use of the pipelines during earthquakes.

Description

Technical Field

[0001] This invention relates to the field of pipeline vibration isolation technology, and in particular to a composite pipeline vibration isolation system. Background Technology

[0002] Pipeline vibration isolation technology is an effective measure for vibration reduction and noise reduction. It reduces the transmission of vibration energy caused by fluid flow, mechanical vibration, or earthquakes by introducing elastic elements and vibration isolation structures into the pipeline system. This technology is of great significance for improving the stability of pipeline systems, extending their service life, reducing maintenance costs, and protecting the environment.

[0003] Pipeline vibration isolation technology effectively alters the natural frequency of a pipeline by introducing elastic elements and vibration isolation structures into the pipeline system, preventing resonance between the pipeline system and periodic external forces (such as hydrodynamics and mechanical vibrations) in its working environment. When the natural frequency of the pipeline is adjusted to a frequency far removed from the excitation force, the pipeline will not enter a resonance state even if an external vibration source is present, thereby greatly reducing the vibration amplitude and preventing pipeline fatigue, damage, or even failure.

[0004] In practical applications, pipeline vibration isolation technology can be implemented in various ways, such as changing pipeline parameters (e.g., length and diameter), adjusting support stiffness (by adding support points or changing the support structure), and installing counterweights on the pipeline system. These measures help raise the natural frequency of the pipeline system, keeping it away from potential resonance regions.

[0005] Furthermore, vibration isolation technology can provide a certain degree of damping, further suppressing the propagation of vibrations and protecting the pipeline structure from long-term damage caused by impact and vibration. In earthquake-prone areas, pipeline vibration isolation technology can also compensate for displacement caused by ground motion, reducing the impact of earthquakes on the pipeline system.

[0006] In modern engineering practice, pipeline vibration isolation technology has a wide range of applications, including but not limited to highways, airports, railways, ships, and petrochemical industries. By rationally designing and selecting vibration isolation systems, vibration and noise can be effectively reduced, improving the overall performance and safety of the system.

[0007] In terms of pipeline vibration isolation technology, rubber vibration isolators and three-dimensional spring vibration isolators are usually used for vibration control.

[0008] Rubber vibration isolators reduce vibration by increasing damping. They can be freely shaped and sized, are simple to manufacture, and are suitable for absorbing vibration and impact in mechanical equipment. Under stress, whether tension, compression, torsion, or shear, rubber can deform significantly, providing sufficient strength. However, rubber's natural frequency is difficult to reach below 5Hz, and it has weak resistance to environmental changes, is prone to aging, and has a short lifespan.

[0009] Three-dimensional spring vibration isolators have high static compression, low natural frequency, good low-frequency vibration isolation effect, and can resist the corrosion of oil and water. Environmental changes do not affect their performance. However, they have relatively low damping, strong transmission capacity, and are prone to vibration and swaying.

[0010] The two components commonly used in pipeline vibration isolation structures mentioned above each have their own advantages and disadvantages. How to reduce the replacement and maintenance costs of pipeline vibration isolation structures has become a problem that vibration isolation professionals must address. Therefore, developing a composite pipeline vibration isolation system is crucial. Summary of the Invention

[0011] To address the aforementioned problems, the present invention aims to provide a composite pipeline vibration isolation system. This system connects to both the pipeline and the foundation, and is positioned between them. The system includes an elastic body mounted on and in contact with the pipeline, a sliding plate support mounted on the foundation, a vibration isolator located on the side of the elastic body near the foundation and the side of the sliding plate support near the pipeline, and movably connected to the sliding plate support, as well as a first damper connecting the pipeline and the foundation. A second damper is positioned at the center of the vibration isolator, and a third damper is positioned at the end of the vibration isolator. The first damper is located on both sides of the vibration isolator along the length of the pipeline. This vibration isolation system is suitable for both horizontal and vertical pipelines, offering significant advantages such as sensitive vibration isolation operation, low residual deformation, and stable performance. Through multiple energy dissipation mechanisms throughout the system, it significantly reduces earthquake damage to the pipeline, enhances the pipeline's seismic resistance, and ensures normal operation of the pipeline during earthquakes.

[0012] The objective of this invention can be achieved through the following technical solutions:

[0013] This invention provides a composite pipeline vibration isolation system, which is connected to the pipeline and the foundation during use and is set between the foundation and the pipeline. The composite pipeline vibration isolation system includes an elastic body set on the pipeline and in contact with the pipeline, a sliding plate support set on the foundation, a vibration isolator set on the side of the elastic body near the foundation and the side of the sliding plate support near the pipeline and movably connected to the sliding plate support, and a first damper connecting the pipeline and the foundation.

[0014] The vibration isolator has a second damper at its internal center and a third damper symmetrically arranged at its ends; the first damper is located on both sides of the vibration isolator along the length of the pipe.

[0015] The first damper is used to adjust the damping in any direction within its mounting plane (for vibration reduction and energy dissipation);

[0016] The second and third dampers are used to enhance the damping of the vibration isolator;

[0017] When the vibration isolator is subjected to horizontal vibration, it is allowed to slide adaptively along the sliding plate support.

[0018] In one embodiment of the present invention, the first damper is a viscous damper, the second damper is a cylindrical viscous damper, and the third damper is an eddy current damper; the vibration isolator is a three-dimensional spring vibration isolator; and the elastomer is selected from polyurethane elastomer or rubber elastomer.

[0019] In one embodiment of the present invention, under normal circumstances, the relative displacement caused by the slight creep of the liquid flow or temperature change in the pipeline is small, and the first damper (viscous damper) does not function, allowing the pipeline to move to a certain extent. However, when an earthquake or braking force is encountered, the relative velocity between the pipeline and the foundation increases to a certain extent and exceeds the design speed. At this time, the viscous damper will automatically lock. At this time, the reaction force on the piston rod increases, and the structure changes to a rigid connection, thereby effectively dispersing and absorbing vibration energy and protecting the pipeline structure.

[0020] The second damper (cylindrical viscous damper) contains a damping medium with adjustable damping force;

[0021] The third damper (eddy current damper) includes a magnetic plate, a non-magnetic plate, and a permanent magnet. The permanent magnet is disposed on the end side of the first support plate, and the magnetic plate and non-magnetic plate are disposed on the end of the second support plate, and on the side close to the first support plate. The magnetic plate is disposed on the side of the non-magnetic plate away from the permanent magnet. When the vibration isolator is subjected to an external force, the support spring will vibrate up and down. At this time, the permanent magnet inside the eddy current damper moves up and down relative to the non-magnetic plate and the magnetic plate, generating eddy currents to dissipate energy by cutting magnetic field lines.

[0022] In one embodiment of the invention, more than one first damper may be provided on one side of the vibration isolator.

[0023] In one embodiment of the present invention, the vibration isolator includes a first support plate and a second support plate arranged in parallel and spaced apart, a support spring disposed between the first support plate and the second support plate, a first connecting seat for connecting the first support plate and the elastic body, and a second connecting seat for movably connecting the second support plate and the sliding plate support.

[0024] In one embodiment of the invention, the support spring is selected from either a helical spring or a disc spring, and is used to provide stiffness.

[0025] In one embodiment of the present invention, the upper surface of the slide support has a sliding groove arranged along the length of the pipe;

[0026] The end of the second connecting seat away from the second support plate is also provided with a sliding plate that is adapted to the sliding groove.

[0027] In one embodiment of the invention, the sliding plate support is used to provide the horizontal displacement capability of the bridge structure, while bearing vertical loads and accommodating the rotation of the beam ends.

[0028] In one embodiment of the present invention, in a static state, the cylindrical viscous damper is perpendicular to the first support plate and the second support plate;

[0029] One end of the cylindrical viscous damper is fixedly connected to the center of the first support plate, and the other end is fixedly connected to the center of the second support plate.

[0030] In one embodiment of the present invention, the outer diameter of the first support plate is smaller than the outer diameter of the second support plate, one end of the eddy current damper is disposed on the side of the second support plate near the first support plate and is fixedly connected to the second support plate; the other end is disposed on the outside of the first support plate and is fixedly connected to the first support plate.

[0031] In one embodiment of the present invention, a limiting mandrel for positioning the support spring is provided on the side of the first support plate near the second support plate and on the side of the second support plate near the first support plate (for constraining the deflection or sliding of the support spring).

[0032] The outer diameter of the limiting mandrel is 1.5 to 2.5 mm smaller than the inner diameter of the supporting spring; the height of the limiting mandrel is 1.5 to 2.5 mm smaller than the inner diameter of the supporting spring.

[0033] In one embodiment of the present invention, one end of the first damper is connected to the foundation via a hinge, and the other end is connected to the pipeline via a hinge and a clamp.

[0034] In one embodiment of the present invention, the clamp is disposed on the outside of the pipe; the first damper is connected to the side of the clamp near the foundation.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] (1) The present invention provides a composite pipeline vibration isolation system, which uses polyurethane elastomer, three-dimensional spring vibration isolator, eddy current damper, cylindrical viscous damper, sliding plate support and viscous damper as the whole pipeline vibration isolation system, thus avoiding the limitations of single pipeline vibration isolation.

[0037] (2) The first damper (viscous damper) in the composite pipeline vibration isolation system of the present invention can allow the pipeline to generate a certain degree of displacement under normal use conditions, and can quickly lock when subjected to earthquake or other sudden external forces to prevent excessive deformation or damage to the structure; its core function is to rapidly increase the damping force through the change of internal medium when the pipeline structure is subjected to high-speed impact (such as earthquake), thereby transforming the structure into a rigid connection to achieve the purpose of earthquake resistance.

[0038] (3) The setting of the third damper (eddy current damper) in the composite pipeline vibration isolation system of the present invention can precisely adjust the required damping force.

[0039] In summary, the composite pipeline vibration isolation system of this invention can significantly reduce earthquake damage to pipelines, while also providing structural support to ensure the pipeline can still function normally during an earthquake. This vibration isolation system can be installed with the foundation in a normal orientation or suspended upside down, offering significant advantages such as no post-earthquake damage, easy installation, minimal residual deformation, and stable performance. It possesses excellent economic practicality and promising prospects for widespread application. Attached Figure Description

[0040] Figure 1 This is a structural schematic diagram of a composite pipeline vibration isolation system according to the present invention;

[0041] Figure 2 This is a schematic diagram of the vibration isolator and the third damper in a composite pipeline vibration isolation system according to the present invention;

[0042] The following are the labels in the diagram: 1. Foundation; 2. Pipeline; 3. Elastomer; 4. Vibration isolator; 41. First support plate; 42. Second support plate; 43. First connecting seat; 44. Second connecting seat; 45. Support spring; 46. Limiting pin; 47. Sliding plate; 5. First damper; 6. Second damper; 7. Third damper; 71. Permanent magnet; 72. Non-magnetic plate; 73. Magnetic plate; 8. Slide plate support; 9. Clamp. Detailed Implementation

[0043] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0044] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0047] In the following embodiments, unless otherwise specified, the structures or components used are conventional structures or components in the art, as long as they can achieve the corresponding functions.

[0048] Example 1

[0049] This embodiment provides a composite pipeline vibration isolation system, such as Figures 1-2 As shown, the composite pipeline vibration isolation system is connected to the pipeline 2 and the foundation 1 during use, and is installed between the foundation 1 and the pipeline 2. It includes an elastic body 3 installed on and in contact with the pipeline 2, a sliding plate support 8 installed on the foundation 1 (the sliding plate support 8 provides horizontal displacement capacity for the foundation, while also bearing vertical loads and adapting to foundation rotation), a vibration isolator 4 installed on the side of the elastic body 3 near the foundation 1 and the side of the sliding plate support 8 near the pipeline 2, and movably connected to the sliding plate support 8, and a first damper 5 installed and connecting the pipeline 2 and the foundation 1. A second damper 6 is installed at the center of the vibration isolator 4, and third dampers 7 are symmetrically arranged at the ends of the vibration isolator 4. The first damper 5 is located on both sides of the vibration isolator 4 along the length of the pipeline 2. The first damper 5 is used to adjust the damping in any direction within its mounting plane (for vibration reduction and energy dissipation). The second damper 6 and the third damper 7 are used to enhance the damping of the vibration isolator 4. When the vibration isolator 4 is subjected to horizontal vibration, it is allowed to adaptively slide along the sliding plate support 8.

[0050] Furthermore, the first damper 5 is a viscous damper, the second damper 6 is a cylindrical viscous damper, and the third damper 7 is an eddy current damper; the vibration isolator 4 is a three-dimensional spring vibration isolator; the elastic body 3 is selected from polyurethane elastomer or rubber elastomer; more than one first damper 5 is allowed to be provided on one side of the vibration isolator 4; preferably, the first damper 5 is symmetrically and obliquely arranged along the central axis of the first support plate 41 and the second support plate 42, and the included angle formed by the central axis of the first damper 5 along the vertical is 30 to 60°.

[0051] Furthermore, the vibration isolator 4 includes a first support plate 41 and a second support plate 42 arranged in parallel intervals, a support spring 45 (more than one set is allowed, preferably, the support spring 45 is symmetrically arranged along the central axis of the first support plate 41 and the second support plate 42) disposed between the first support plate 41 and the second support plate 42, a first connecting seat 43 for connecting the first support plate 41 and the elastic body 3, and a second connecting seat 44 for movably connecting the second support plate 42 and the slide plate support 8.

[0052] Furthermore, the support spring 45 is selected from either a helical spring or a disc spring to provide stiffness;

[0053] Furthermore, the upper surface of the slide plate support 8 has a sliding groove arranged along the length of the pipe 2; the end of the second connecting seat 44 away from the second support plate 42 is also provided with a sliding plate 48 that matches the sliding groove.

[0054] Furthermore, in the static state, the cylindrical viscous damper is perpendicular to the first support plate 41 and the second support plate 42; one end of the cylindrical viscous damper is fixedly connected to the center position of the first support plate 41, and the other end is fixedly connected to the center position of the second support plate 42.

[0055] The outer diameter of the first support plate 41 is smaller than the outer diameter of the second support plate 42. One end of the eddy current damper is disposed on the side of the second support plate 42 near the first support plate 41 and is fixedly connected to the second support plate 42; the other end is disposed on the outside of the first support plate 41 and is fixedly connected to the first support plate 41.

[0056] The first support plate 41 is provided with a limiting spindle 47 for positioning the support spring 45 on the side near the second support plate 42, and the second support plate 42 is provided with a limiting spindle 47 for constraining the deflection or sliding of the support spring 45 on the side near the first support plate 41. The outer diameter of the limiting spindle 47 is 1.5 to 2.5 mm smaller than the inner diameter of the support spring 45. The height of the limiting spindle 47 is 1.5 to 2.5 mm smaller than the inner diameter of the support spring 45.

[0057] Furthermore, one end of the first damper 5 is connected to the foundation 1 via a hinge, and the other end is connected to the pipe 2 via a hinge and a clamp 9; the clamp 9 is arranged around the outside of the pipe 2; the first damper 5 is connected to the side of the clamp 9 closest to the foundation 1.

[0058] Furthermore, under normal circumstances, due to the small relative displacement caused by the slight creep of the liquid flow or temperature changes in the pipe 2, the first damper 5 (viscous damper) does not function, allowing the pipe 2 to have a certain relative movement; however, when encountering an earthquake or braking force, the relative velocity between the pipe 2 and the foundation 1 increases to a certain extent, exceeding the design speed, the viscous damper will automatically lock. At this time, the reaction force on the piston rod increases, and the structure changes to a rigid connection, thereby effectively dispersing and absorbing vibration energy and protecting the structure of the pipe 2.

[0059] The second damper 6 (cylinder type viscous damper) contains a damping medium with adjustable damping force.

[0060] The third damper 7 (eddy current damper) includes a magnetic plate 73, a non-magnetic plate 72, and a permanent magnet 71. The permanent magnet 71 is disposed on the end side of the first support plate 41. The magnetic plate 73 and the non-magnetic plate 72 are disposed at the end of the second support plate 42 and on the side close to the first support plate 41. The magnetic plate 73 is disposed on the side of the non-magnetic plate 72 away from the permanent magnet 71. When the vibration isolator 4 is subjected to external force, the support spring 45 will vibrate up and down. At this time, the permanent magnet 71 inside the eddy current damper moves up and down relative to the non-magnetic plate 72 and the magnetic plate 73, generating eddy currents to dissipate energy by cutting magnetic field lines.

[0061] In summary, the composite pipeline vibration isolation system provided in this embodiment can significantly reduce earthquake damage to pipeline 2. Simultaneously, the entire vibration isolation system also provides support, ensuring that pipeline 2 can still be used normally during an earthquake. The vibration isolation system of this invention can be installed with the foundation 1 in a normal supporting manner or inverted suspended installation. It has significant advantages such as no post-earthquake damage, convenient installation, small residual deformation, and stable performance, demonstrating good economic practicality and promising prospects for widespread application.

[0062] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the interpretation of the present invention, without departing from the scope of the invention, should be within the protection scope of the present invention.

Claims

1. A composite pipe vibration isolation system, which is connected to a pipe (2) and a foundation (1) during use, and is disposed between the foundation (1) and the pipe (2), characterized in that, The composite pipeline vibration isolation system includes an elastic body (3) disposed on the pipeline (2) and in contact with the pipeline (2), a sliding plate support (8) disposed on the foundation (1), a vibration isolator (4) disposed on the side of the elastic body (3) near the foundation (1) and the side of the sliding plate support (8) near the pipeline (2) and movably connected to the sliding plate support (8), and a first damper (5) connecting the pipeline (2) and the foundation (1); The vibration isolator (4) has a second damper (6) at its internal center and a third damper (7) symmetrically arranged at its ends; the first damper (5) is arranged on both sides of the vibration isolator (4) along the length of the pipe (2). The first damper (5) is used to adjust the damping in any direction within its mounting plane; The second damper (6) and the third damper (7) are used to enhance the damping of the vibration isolator (4), thereby reducing the vibration of the system; When the vibration isolator (4) is subjected to horizontal vibration, it is allowed to slide adaptively along the sliding plate support (8); Among them, the first damper (5) is a viscous damper, the second damper (6) is a cylindrical viscous damper, the third damper (7) is an eddy current damper, and the vibration isolator (4) is a three-dimensional spring vibration isolator. The upper surface of the slide support (8) has a sliding groove along the length of the pipe (2); The vibration isolator (4) is provided with a sliding plate (47) that matches the sliding groove.

2. The composite pipeline vibration isolation system according to claim 1, characterized in that, The elastomer (3) is selected from polyurethane elastomers or rubber elastomers.

3. A composite pipeline vibration isolation system according to claim 2, characterized in that, The vibration isolator (4) includes a first support plate (41) and a second support plate (42) arranged in parallel intervals, a support spring (45) disposed between the first support plate (41) and the second support plate (42), a first connecting seat (43) for connecting the first support plate (41) and the elastic body (3), and a second connecting seat (44) for connecting the second support plate (42) and the sliding plate support (8) in a movable connection.

4. A composite pipeline vibration isolation system according to claim 3, characterized in that, The end of the second connecting seat (44) away from the second support plate (42) is provided with a sliding plate (47) that is adapted to the sliding groove.

5. A composite pipeline vibration isolation system according to claim 3, characterized in that, In a static state, the cylindrical viscous damper is perpendicular to the first support plate (41) and the second support plate (42). One end of the cylindrical viscous damper is fixedly connected to the center of the first support plate (41), and the other end is fixedly connected to the center of the second support plate (42).

6. A composite pipeline vibration isolation system according to claim 3, characterized in that, The outer diameter of the first support plate (41) is smaller than the outer diameter of the second support plate (42). One end of the eddy current damper is located on the side of the second support plate (42) close to the first support plate (41), and the other end is located on the outside of the first support plate (41).

7. A composite pipeline vibration isolation system according to claim 3, characterized in that, The first support plate (41) is provided with a limiting spindle (46) for positioning the support spring (45) on the side of the second support plate (42) and the second support plate (42) is provided with a limiting spindle (46) for positioning the support spring (45).

8. A composite pipeline vibration isolation system according to claim 7, characterized in that, The outer diameter of the limiting mandrel (46) is 1.5~2.5mm smaller than the inner diameter of the supporting spring (45); The height of the limiting mandrel (46) is 1.5~2.5mm smaller than the inner diameter of the support spring (45).

9. A composite pipeline vibration isolation system according to claim 1, characterized in that, One end of the first damper (5) is connected to the foundation (1) via a hinge, and the other end is connected to the pipe (2) via a hinge and a clamp (9).

10. A composite pipeline vibration isolation system according to claim 9, characterized in that, The clamp (9) is arranged around the outside of the pipe (2); the first damper (5) is connected to the side of the clamp (9) near the foundation (1).

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