Composite pipeline vibration isolation system

Abstract

The invention relates to the technical field of pipeline vibration isolation, in particular to a composite pipeline vibration isolation system, which is connected with a pipeline and a foundation during use, is arranged between the foundation and the pipeline, and comprises an elastic body arranged on the pipeline and attached to the pipeline, and a sliding plate support arranged on the foundation, the vibration isolator is arranged on the side, close to the foundation, of the elastic body and the side, close to the pipeline, of the sliding plate support and movably connected with the sliding plate support; wherein a second damper is arranged in the center of the interior of the vibration isolator, and a third damper is arranged at the end of the vibration isolator; the first dampers are arranged on the two sides of the vibration isolator in the length direction of the pipeline. The vibration isolation system is suitable for a horizontal pipeline and also suitable for a vertical pipeline, through multiple energy consumption of the whole system, damage of an earthquake to the pipeline is greatly weakened, the anti-seismic capacity of the pipeline is enhanced, and therefore it is ensured that the pipeline is normally used when the earthquake happens.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline vibration isolation, and in particular to a composite pipeline vibration isolation system. Background Art

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

[0003] Pipeline vibration isolation technology effectively changes the natural frequency of the pipeline by introducing elastic elements and vibration isolation structures into the pipeline system, thus avoiding resonance between the pipeline system and periodic external forces (such as fluid dynamics, mechanical vibration, etc.) in its working environment. When the natural frequency of the pipeline is adjusted to a frequency far away from the excitation force, the pipeline will not enter a resonant state even if there is an external vibration source, thereby greatly reducing the vibration amplitude and preventing pipeline fatigue, damage, or even failure caused by it.

[0004] In practical applications, pipeline vibration isolation technology can be achieved in many ways, such as changing pipeline parameters (such as length and diameter), adjusting support stiffness (by adding support points or changing support structures), and adding balancing blocks to the pipeline system. These measures help to increase the natural frequency of the pipeline system and keep it away from potential resonance areas.

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

[0006] In modern engineering practice, pipeline vibration isolation technology is widely used, including but not limited to highways, airports, railways, ships, petrochemicals and other fields. Through reasonable design and selection of vibration isolation systems, vibration and noise can be effectively reduced and the overall performance and safety of the system can be improved.

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

[0008] Rubber vibration isolators reduce vibration by increasing damping. They can be freely selected in shape and size, are simple to manufacture, and are suitable for vibration and impact absorption of mechanical equipment. Under stress, whether it is tension, compression, torsion or shear, rubber can have a large deformation and can provide sufficient strength. However, the natural frequency of rubber is difficult to reach below 5Hz, and it has weak resistance to environmental changes, is prone to aging, and has a short lifespan.

[0009] The three-dimensional spring isolator has a large static compression, low natural frequency, good low-frequency vibration isolation effect, can resist oil and water erosion, and environmental changes will not affect its performance. However, the damping is relatively low, the transmission capacity is strong, and it is easy to vibrate and sway.

[0010] The above two components commonly used in pipeline vibration isolation structures 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 workers must face. Therefore, it is very important to develop a composite pipeline vibration isolation system. Summary of the invention

[0011] In order to solve the above problems, the purpose of the present invention is to provide a composite pipeline vibration isolation system, which is connected to the pipeline and the foundation when in use, and is arranged between the foundation and the pipeline. The vibration isolation system includes an elastomer arranged on the pipeline and in contact with the pipeline, a slide support arranged on the foundation, a vibration isolator arranged on the side of the elastomer close to the foundation and the side of the slide support close to the pipeline and movably connected to the slide support, and a first damper connecting the pipeline and the foundation; wherein a second damper is arranged at the inner center position of the vibration isolator, and a third damper is arranged at the end of the vibration isolator; 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 invention is suitable for both horizontal pipelines and vertical pipelines, and has significant advantages such as sensitive vibration isolation, small residual deformation, and stable performance; through the multiple energy consumption of the entire system, the damage to the pipeline caused by the earthquake is greatly weakened, and the seismic resistance of the pipeline is enhanced, thereby ensuring the normal use of the pipeline when an earthquake occurs.

[0012] The purpose of the present invention can be achieved by the following technical solutions:

[0013] The present invention provides a composite pipeline vibration isolation system, which is connected to a pipeline and a foundation when in use, and is arranged between the foundation and the pipeline. The composite pipeline vibration isolation system comprises an elastic body arranged on the pipeline and in contact with the pipeline, a slide support arranged on the foundation, a vibration isolator arranged on one side of the elastic body close to the foundation and one side of the slide support close to the pipeline and movably connected to the slide support, and a first damper connecting the pipeline and the foundation;

[0014] Wherein, a second damper is arranged at the inner center of the vibration isolator, and a third damper is symmetrically arranged at the ends of the vibration isolator; the first damper is arranged at both sides of the vibration isolator along the length direction of the pipeline;

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

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

[0017] When the isolator is subjected to horizontal vibration, it is allowed to slide adaptively along the slide 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 one of a polyurethane elastomer and a rubber elastomer.

[0019] In one embodiment of the present invention, under normal circumstances, due to the small relative displacement caused by the slight creep or temperature change of the liquid flow in the pipeline, the first damper (viscous damper) does not work, allowing the pipeline to have a certain relative movement; however, when encountering an earthquake or braking force, the relative speed between the pipeline and the foundation increases to a certain extent, exceeding the design speed, the viscous damper will automatically lock, at which time the reaction force on the piston rod increases, and the structure is transformed into 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 conductive plate, a non-magnetic plate and a permanent magnet, wherein the permanent magnet is arranged on the end side of the first support plate, the magnetic conductive plate and the non-magnetic plate are arranged on the end of the second support plate and on the side close to the first support plate, wherein the magnetic conductive plate is arranged on the side of the non-magnetic plate away from the permanent magnet; when the vibration isolator is subjected to external force, the support spring will vibrate up and down, and at this time, the permanent magnet inside the eddy current damper moves up and down relative to the non-magnetic plate and the magnetic conductive plate, generating eddy current energy consumption by cutting the magnetic lines of force.

[0022] In one embodiment of the present invention, more than one first damper is allowed to 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 arranged between the first support plate and the second support plate, a first connecting seat for connecting the first support plate and the elastomer, and a second connecting seat for connecting the second support plate and the slide plate support in a movably connected manner.

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

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

[0026] The end of the second connecting seat away from the second supporting plate is also provided with a sliding plate matched with the sliding groove.

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

[0028] In one embodiment of the present invention, in a stationary state, the cartridge 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 position of the first support plate, and the other end is fixedly connected to the center position 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 arranged on a side of the second support plate close to the first support plate and is fixedly connected to the second support plate; the other end is arranged on the outer side of the first support plate and is fixedly connected to the first support plate.

[0031] In one embodiment of the present invention, a limiting core shaft for positioning the support spring (for restricting the deflection or sliding of the support spring) is provided on one side of the first support plate close to the second support plate and on one side of the second support plate close to the first support plate;

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

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

[0034] In one embodiment of the present invention, the clamp ring is arranged on the outside of the pipeline; and the first damper is connected to a side of the clamp close to the foundation.

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

[0036] (1) The composite pipeline vibration isolation system of the present invention adopts polyurethane elastomer, three-dimensional spring vibration isolator, eddy current damper, cylindrical viscous damper, slide plate support and viscous damper as the entire pipeline vibration isolation system, avoiding the limitation of single pipeline vibration isolation.

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

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

[0039] In summary, the composite pipeline vibration isolation system of the present invention can greatly reduce the damage to the pipeline caused by earthquakes. At the same time, the entire vibration isolation system also plays a supporting role, which can ensure that the pipeline can still be used normally when an earthquake occurs. The vibration isolation system of the present invention can be installed with positive support from the foundation or inverted suspension. It has significant advantages such as no damage after the earthquake, easy installation, small residual deformation, stable performance, etc., and has good economic practicality and promotion prospects. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0042] Numbers in the figure: 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. supporting spring; 46. limit pin; 47. sliding plate; 5. first damper; 6. second damper; 7. third damper; 71. permanent magnet; 72. non-magnetic plate; 73. magnetic conductive plate; 8. skateboard support; 9. clamp. DETAILED DESCRIPTION

[0043] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the 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, when in use, it is connected to the pipeline 2 and the foundation 1, and is arranged between the foundation 1 and the pipeline 2. The composite pipeline vibration isolation system includes an elastic body 3 arranged on the pipeline 2 and in contact with the pipeline 2, a slide support 8 arranged on the foundation 1 (the slide support 8 is used to provide the horizontal displacement capacity of the foundation, while bearing the vertical load and adapting to the rotation of the foundation), a vibration isolator 4 arranged on the side of the elastic body 3 close to the foundation 1 and the slide support 8 close to the side of the pipeline 2 and movably connected to the slide support 8, and a first damper 5 arranged and connecting the pipeline 2 and the foundation 1; wherein, a second damper 6 is arranged at the inner center position of the vibration isolator 4, and a third damper 7 is symmetrically arranged at the end of the vibration isolator 4; the first damper 5 is arranged on both sides of the vibration isolator 4 along the length direction of the pipeline 2; the first damper 5 is used to adjust the damping in any direction within its installation plane (for vibration reduction and energy consumption); 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 slide adaptively along the slide 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 isolator; the elastomer 3 is selected from one of a polyurethane elastomer or a 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 angle formed by the central axis of the first damper 5 along the vertical direction 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 and spaced apart, a support spring 45 arranged between the first support plate 41 and the second support plate 42 (more than one group is allowed to be arranged, preferably, the support spring 45 is symmetrically arranged along the central axis of 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 elastomer 3, and a second connecting seat 44 for connecting the second support plate 42 and the skateboard support 8 in an movably connected manner.

[0052] Furthermore, the support spring 45 is selected from one of a coil spring or a disc spring, and is used to provide stiffness;

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

[0054] Further, 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 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 arranged on a side of the second support plate 42 close to the first support plate 41 and is fixedly connected to the second support plate 42; the other end is arranged on the outer side of the first support plate 41 and is fixedly connected to the first support plate 41.

[0056] A limiting core shaft 47 (used to restrict the deflection or sliding of the support spring 45) is provided on one side of the first support plate 41 close to the second support plate 42 and on one side of the second support plate 42 close to the first support plate 41 for positioning the support spring 45; the outer diameter of the limiting core shaft 47 is 1.5 to 2.5 mm smaller than the inner hole diameter of the support spring 45; the height of the limiting core shaft 47 is 1.5 to 2.5 mm smaller than the inner hole diameter of the support spring 45.

[0057] Furthermore, one end of the first damper 5 is connected to the foundation 1 through a hinged ear, and the other end is connected to the pipe 2 through a hinged ear and a clamp 9; the clamp 9 is arranged on the outside of the pipe 2; the first damper 5 is connected to the side of the clamp 9 close to the foundation 1;

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

[0059] The second damper 6 (cylindrical viscous damper) contains a damping medium with adjustable damping force;

[0060] The third damper 7 (eddy current damper) includes a magnetic conductive plate 73, a non-magnetic plate 72 and a permanent magnet 71, wherein the permanent magnet 71 is arranged on the end side of the first support plate 41, and the magnetic conductive plate 73 and the non-magnetic plate 72 are arranged at the end of the second support plate 42 and on the side close to the first support plate 41, wherein the magnetic conductive plate 73 is arranged 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, and 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 conductive plate 73, generating eddy current energy consumption by cutting the magnetic flux lines.

[0061] In summary, the composite pipeline vibration isolation system provided in this embodiment can greatly reduce the damage caused by earthquake to pipeline 2, and the entire vibration isolation system also plays a supporting role, which can ensure that pipeline 2 can still be used normally when an earthquake occurs. The vibration isolation system of the present invention can be installed with positive support on the foundation 1 or inverted suspension, and has significant advantages such as no damage after earthquake, easy installation, small residual deformation, stable performance, etc., and has good economic practicality and promotion prospects.

[0062] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the explanation of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A composite pipeline vibration isolation system, which is connected to a pipeline (2) and a foundation (1) when in use, and is arranged between the foundation (1) and the pipeline (2), characterized in that: The composite pipeline vibration isolation system comprises an elastic body (3) arranged on the pipeline (2) and in contact with the pipeline (2), a slide support (8) arranged on the foundation (1), a vibration isolator (4) arranged on a side of the elastic body (3) close to the foundation (1) and a side of the slide support (8) close to the pipeline (2) and movably connected to the slide support (8), and a first damper (5) connecting the pipeline (2) and the foundation (1); The second damper (6) is arranged at the inner center of the vibration isolator (4), and the third damper (7) is symmetrically arranged at the end of the vibration isolator (4); the first damper (5) is arranged on both sides of the vibration isolator (4) along the length direction of the pipeline (2); The first damper (5) is used to adjust the damping in any direction within the installation 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 slide plate support (8).

2. A composite pipeline vibration isolation system according to claim 1, characterized in that: 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; and the elastomer (3) is selected from one of a polyurethane elastomer and a rubber elastomer.

3. A composite pipeline vibration isolation system according to claim 2, characterized in that: The vibration isolator (4) comprises a first support plate (41) and a second support plate (42) which are arranged in parallel and spaced apart from each other, a support spring (45) arranged 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 slide plate support (8) in a movably connected manner.

4. A composite pipeline vibration isolation system according to claim 3, characterized in that: The upper surface of the slide plate support (8) has a sliding groove arranged along the length direction of the pipe (2); The end of the second connecting seat (44) away from the second supporting plate (42) is also provided with a sliding plate (47) 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 arranged on a side of the second support plate (42) close to the first support plate (41), and the other end is arranged on the outside of the first support plate (41).

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

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

9. The 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 hinged ear, and the other end is connected to the pipeline (2) via a hinged ear and a clamp (9).

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

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