A damping device applied in a fluid, a pipeline plugging device and a plugging method

Abstract

A damping device applied to fluid, comprising a first damping mechanism and a second damping mechanism arranged along the flow direction of the fluid, a protection space for accommodating a protected object is formed between the first damping mechanism and the second damping mechanism; the first damping mechanism comprises a damping disc, the damping disc is connected with the protected object through a plurality of first energy absorbing components, and the first energy absorbing components can be compressed when the damping disc is impacted by the fluid; the second damping mechanism comprises an energy absorbing plate, the energy absorbing plate is rotationally connected with the protected object, a plurality of mounting holes are formed in the energy absorbing plate, and an energy dissipation component is arranged in the mounting hole, the energy dissipation component comprises two open and opposite spherical bowls, the bottom of the spherical bowl is fixedly connected with the hole wall of the mounting hole, a rolling ball is rotationally arranged in the spherical bowl, and the two rolling balls are in contact with each other. The damping device realizes damping in multiple ways, has good damping effect, can effectively protect the protected object, and is especially suitable for pipeline plugging.

Description

Technical Field

[0001] This invention relates to the field of pipeline plugging technology, specifically to a vibration damping device, pipeline plugging device, and plugging method applied to fluids. Background Technology

[0002] Energy is the foundation of human societal development, with oil and natural gas being crucial energy sources. The safe and stable operation of their transmission pipelines is paramount. Pipelines operate under high loads for extended periods, making them susceptible to malfunctions due to wear, aging, and human error, necessitating timely replacement or repair, especially in critical components such as valves. Therefore, efficient and reliable pipeline emergency repair technology is of great significance.

[0003] While the currently widely used live-line tapping technology enables emergency repairs without interrupting pipeline operations, it suffers from drawbacks such as complex operation and limited efficiency. Furthermore, it permanently welds tees onto the pipeline, causing irreparable structural damage and posing long-term safety hazards. In contrast, emerging internal pipe sealing technology offers advantages such as wide applicability, ease of operation, superior sealing performance, high safety, and lower cost, significantly reducing the risk of pipeline damage caused by tapping. With the increasing development of deep-sea oil and gas resources and the laying of marine pipelines, this technology has even greater potential for application in marine pipeline emergency repairs, helping to further reduce operating costs and risks.

[0004] However, the environment in which the plugging device operates during high-pressure pipeline plugging operations is extremely complex. The high fluid velocity and pressure within the pipe, along with significant temperature differences in different sections, lead to a strong feedback effect between the plugging device and the fluid, causing coupled vibrations in the pipeline-fluid-plugging device system. This vibration accelerates damage to both the pipeline and the plugging device itself. In particular, changes in the flow field can cause drastic fluctuations in vorticity and pressure, easily generating harmful vibration phenomena such as wake vortices and turbulent resonances during the plugging process. These vibrations severely impact the plugging device, affecting not only its sealing performance but also potentially triggering safety accidents.

[0005] The existing vibration reduction devices for pipe plugs simply use baffles to disrupt the flow field to achieve vibration reduction. The vibration reduction method is relatively simple and only addresses the flow field change problem. It lacks the ability to dissipate and treat the source, propagation, and end of vibration energy. At the same time, it is only effective in treating the direction of flow field impact. The axial direction of the plug has a significant turbulence effect, but the effect on disturbances and vibrations in other directions is not obvious. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a vibration damping device, a pipe sealing device, and a sealing method applicable to fluids. It employs multiple methods to achieve vibration damping, resulting in good vibration damping effect and effectively protecting the object being protected. It is particularly suitable for pipe sealing.

[0007] To achieve the above objectives, the specific solution adopted by the present invention is as follows: a vibration damping device applied in a fluid, comprising a first vibration damping mechanism and a second vibration damping mechanism arranged along the flow direction of the fluid, wherein a protective space for accommodating the protected object is formed between the first vibration damping mechanism and the second vibration damping mechanism. The first vibration damping mechanism includes a vibration damping disk, which is connected to the protected object through multiple first energy-absorbing components. When the vibration damping disk is impacted by fluid, it can compress the first energy-absorbing components. The second vibration damping mechanism includes an energy-absorbing plate, which is rotatably connected to the protected object. The energy-absorbing plate has multiple mounting holes, and an energy-dissipating component is installed in the mounting holes. The energy-dissipating component includes two spherical bowls with opposite openings, and the bottom of the spherical bowls is fixedly connected to the wall of the mounting hole. A rolling ball is rotatably installed in the spherical bowl, and the two rolling balls are in contact with each other.

[0008] As a further optimization of the above-mentioned vibration damping device applied in fluid: the first energy-absorbing component includes an outer sleeve fixedly connected to the protected object, an inner sleeve fixedly connected to the damping disc, and a first spring connected between the protected object and the damping disc, wherein the first spring is located inside the inner sleeve, and the outer sleeve can be fitted onto the inner sleeve when the first energy-absorbing component is compressed.

[0009] As a further optimization of the above-mentioned vibration damping device applied in fluids: a central energy-absorbing component is provided between the energy-absorbing plate and the protected object. The central energy-absorbing component includes an inner tube and an outer tube nested together, and a damper is provided inside the inner tube.

[0010] As a further optimization of the above-mentioned vibration damping device applied in fluid: the energy-absorbing plate is connected to a flow-disrupting component, which includes a first flow-disrupting plate, a second flow-disrupting plate and a third flow-disrupting plate arranged in sequence, wherein the second flow-disrupting plate is hinged to both the first flow-disrupting plate and the third flow-disrupting plate, and the first flow-disrupting plate and the third flow-disrupting plate are also hinged to the energy-absorbing plate.

[0011] As a further optimization of the above-mentioned vibration damping device applied in fluid: the second vibration damping mechanism includes at least one main mounting rod and at least one first mounting rod fixedly connected to the protected object. A rotating column is rotatably provided on both the main mounting rod and the first mounting rod, and two pressure-bearing balls are provided on the main mounting rod. The two pressure-bearing balls are located at the two ends of the rotating column, and a plurality of second energy-absorbing components are provided on the side wall of the rotating column.

[0012] As a further optimization of the above-mentioned vibration damping device applied to fluids: the circumferential sidewall of the rotating column is provided with several axially extending grooves, the second energy absorption component includes a damping block, the damping block is slidably disposed in the groove, and a spring unit is provided between each end of the damping block and the groove, the spring unit including a second spring.

[0013] As a further optimization of the above-mentioned vibration damping device applied to fluids: the spring unit includes a connecting plate, which is perpendicular to the slide groove. The second spring is connected between the end of the connecting plate and the slide groove. A portion of the connecting plate extends out of the slide groove and is connected to an extension plate. Each end of the slide groove is provided with a positioning plate that is parallel to the slide groove. During the sliding of the damping block, the extension plate can move to the side of the positioning plate facing away from the slide groove.

[0014] As a further optimization of the above-mentioned vibration damping device applied in fluids: the first mounting rod is connected to the second mounting rod via a hinge, the energy-absorbing plate is fixedly connected to the second mounting rod, and the rotating column is also provided on the second mounting rod.

[0015] Pipeline plugging device, including: A plug is used to seal off a pipe. The above-mentioned vibration damping device applied in fluid has the first vibration damping mechanism and the second vibration damping mechanism respectively connected to both ends of the plug.

[0016] A pipeline plugging method, based on the aforementioned pipeline plugging device, the method comprising: Connect the vibration damping device to the plug; The vibration damping device and the plugging device are placed into the pipe to be plugged, with the first vibration damping mechanism and the second vibration damping mechanism distributed along the flow direction of the fluid in the pipe; The plug is driven to move along the pipeline, and vibration is reduced by a vibration damping device; When the plug moves to the target position, it is used to seal the pipeline.

[0017] Beneficial effects: Through the synergistic action of the first energy-absorbing component, the second energy-absorbing component, the turbulence component, and the energy-dissipating component, this invention can absorb and dissipate the vibration energy generated by fluid impact in different directions. Furthermore, the first and second vibration damping mechanisms of this invention are located at both ends of the protected object, providing sufficient protection for the protected object. When this invention is used in conjunction with a pipe plug for pipe plugging, the vibration damping device can begin mechanical movement after the pipe plug enters the pipe, changing the previous single-form, single-direction vibration damping. The impact of the fluid in the main direction of movement is greatly buffered after layers of buffering, and the effect of dissipating the impact energy in the axial direction is extremely obvious. The synergistic work of multiple vibration damping methods continuously dissipates the impact energy in other directions. The vibration damping structure is not only simple in form but also ensures the efficiency of vibration damping, significantly reducing the vibration rate during the plugging process, achieving significant effects of energy absorption and vibration damping, reducing flow field impact, ensuring plugging efficiency, and ensuring stable operation. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the overall structure of the vibration reduction device of the present invention; Figure 2 This is a schematic diagram of the structure of the first energy-absorbing component; Figure 3 This is a schematic diagram of the structure of the second energy-absorbing component; Figure 4 This is a schematic diagram of the energy-absorbing plate and the turbulence-disrupting components; Figure 5 This is a schematic diagram of the energy dissipation component; Figure 6 This is a schematic diagram of the second vibration damping mechanism from a first-person perspective; Figure 7 yes Figure 6 Enlarged view of section A; Figure 8 This is a schematic diagram of the second vibration damping mechanism from a second perspective.

[0019] Figure descriptions: 1-Blocker, 2-Damping disc, 3-First energy-absorbing component, 4-Through hole, 5-First mounting rod, 6-Rotating column, 7-Second energy-absorbing component, 8-Hinge, 9-Second mounting rod, 10-Energy-absorbing plate, 11-Mounting hole, 12-Break assembly, 13-Outer sleeve, 14-Inner sleeve, 15-First spring, 16-Damping block, 17-Connecting plate, 18-Extension plate, 19-Second spring, 20-Positioning plate, 21-First spoiler, 22-Second spoiler, 23-Third spoiler, 24-Rolling ball, 25-Ball cup, 26-Center energy-absorbing component, 27-Main mounting rod, 28-Pressure-bearing ball, 29-Outer tube, 30-Inner tube. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 , Figure 4 and Figure 5 As shown, a vibration damping device applied in a fluid includes a first vibration damping mechanism and a second vibration damping mechanism arranged along the flow direction of the fluid, with a protective space formed between the first vibration damping mechanism and the second vibration damping mechanism for accommodating the protected object.

[0022] The first vibration damping mechanism includes a vibration damping disc 2, which is connected to the protected object through multiple first energy-absorbing components 3. When the vibration damping disc 2 is impacted by fluid, it can compress the first energy-absorbing components 3.

[0023] The second vibration damping mechanism includes an energy-absorbing plate 10, which is rotatably connected to the protected object. The energy-absorbing plate 10 has multiple mounting holes 11, and an energy-dissipating component is installed in the mounting hole 11. The energy-dissipating component includes two ball cups 25 with opposite openings, and the bottom of the ball cups 25 is fixedly connected to the hole wall of the mounting hole 11. A rolling ball 24 is rotatably installed in the ball cup 25, and the two rolling balls 24 are in contact with each other.

[0024] The vibration damping device of the present invention is applied in fluids, for example, it can be used in conjunction with a pipe plug in a pipeline. In use, the first and second vibration damping mechanisms are respectively positioned at both ends of the protected object, such as the pipe plug, thus placing the protected object within a protected space. The first and second vibration damping mechanisms dampen vibrations at both ends of the protected object, preventing fluid impacts that could cause instability or even damage. More specifically, when the protected object moves within the fluid under the protection of the vibration damping device of the present invention, the first vibration damping structure first withstands the fluid impact. When the fluid impacts the damping disc 2, it pushes the damping disc 2. The damping disc 2, pushed by the fluid, compresses the first energy-absorbing component 3, causing it to deform. This allows the first energy-absorbing component 3 to store a portion of the energy from the fluid impact, achieving the vibration damping effect. Afterwards, the fluid flows over the protected object and impacts the energy-absorbing plate 10. Because the energy-absorbing plate 10 has mounting holes 11, some fluid flows through these holes. Within the mounting holes 11, the fluid impacts the rolling balls 24, driving them to rotate within the ball bowl 25. Since the two rolling balls 24 of the energy-dissipating assembly are in contact with each other, they rub against each other during rotation, continuously absorbing fluid energy and achieving vibration reduction. To enhance the energy dissipation effect of the energy-dissipating assembly, the surfaces of the rolling balls 24 and the inner walls of the ball bowl 25 can be machined with a larger roughness, thereby increasing the friction between the rolling balls 24 and the ball bowl 25, as well as the friction between the two rolling balls 24. This allows the rolling balls 24 to consume more fluid energy during rotation driven by the fluid, thus improving the vibration reduction effect.

[0025] like Figure 2As shown, the specific structure of the first energy-absorbing component 3 is as follows: The first energy-absorbing component 3 includes an outer sleeve 13 fixedly connected to the protected object, an inner sleeve 14 fixedly connected to the damping disc 2, and a first spring 15 connected between the protected object and the damping disc 2. The first spring 15 is located inside the inner sleeve 14. When the first energy-absorbing component 3 is compressed, the outer sleeve 13 can be fitted onto the inner sleeve 14. When the fluid impacts the damping disc 2, it pushes the damping disc 2 to move. During the movement of the damping disc 2, it pushes the inner sleeve 14 to move synchronously, thereby causing the inner sleeve 14 to move into the inner sleeve 13 and compress the first spring 15. The first spring 15 absorbs the fluid energy, achieving the effect of vibration reduction. By controlling the dimensions of the inner sleeve 14 and the outer sleeve 13, making the outer diameter of the inner sleeve 14 equal to the inner diameter of the outer sleeve 13, the sealing performance between the inner sleeve 14 and the outer sleeve 13 can be improved, preventing fluid from intruding into the outer sleeve 13 and causing the first spring 15 to be unable to deform smoothly. To further improve the sealing effect, a flexible protective sleeve can be connected between the end of the outer sleeve 13 connected to the protected object and the end of the inner sleeve 14 connected to the damping plate 2. The flexible protective sleeve seals the inner sleeve 14 and the outer sleeve 13, thereby effectively preventing fluid from entering the outer sleeve 13 and ensuring that the inner sleeve 14 can move into the interior of the outer sleeve 13 under the push of the damping plate 2. In addition, the damping plate 2 is set as a disc, which can convert the chaotic impact of the fluid on the periphery of the damping plate 2 into a uniform axial impact and transmit it to the first spring 15.

[0026] Furthermore, spring grooves are formed on the surfaces of both the damping disc 2 and the protected object. The end of the first spring 15 is placed into the spring groove to ensure the stability of the first spring 15, thereby ensuring that the first spring 15 can be smoothly compressed to absorb the energy of the fluid. Based on the damping disc 2 being a disc, multiple first energy-absorbing components 3 are evenly distributed along the circumference of the damping disc 2. In one embodiment of the invention, three first energy-absorbing components 3 are provided.

[0027] To prevent the damping disc 2 from being damaged by excessive fluid impact, which could lead to the failure of the first spring 15 or damage to the damping disc 2, at least one through hole 4 is provided on the damping disc 2. With the help of the through hole 4, some fluid can pass directly through the damping disc 2, ensuring that the damping disc 2 can perform its vibration damping function while avoiding excessive impact on the damping disc 2, thus protecting the damping disc 2 and the first energy absorption component 3.

[0028] To further enhance vibration reduction performance, a central energy-absorbing assembly 26 is provided between the energy-absorbing plate 10 and the protected object. The central energy-absorbing assembly 26 includes an inner tube 30 and an outer tube 29 nested together, with a damper installed inside the inner tube. The damper can be a friction damper, a viscous damper, or a magnetorheological damper, all existing technologies, and will not be described in detail here. When the device moves within the fluid, the energy-absorbing plate 10, under the influence of the fluid, moves closer to the protected object, causing the inner tube 30 to move into the outer tube 29 and compressing the damper. This allows the damper to absorb energy, further improving vibration reduction performance.

[0029] To further enhance the vibration reduction performance of the second vibration damping mechanism, the energy-absorbing plate 10 is connected to a turbulence assembly 12. The turbulence assembly 12 includes a first turbulence plate 21, a second turbulence plate 22, and a third turbulence plate 23 arranged sequentially. The second turbulence plate 22 is hinged to both the first turbulence plate 21 and the third turbulence plate 23, and the first turbulence plate 21 and the third turbulence plate 23 are also hinged to the energy-absorbing plate 10. More specifically, the second turbulence plate 22 is hinged to the first turbulence plate 21 and the third turbulence plate 23, the first turbulence plate 21 is hinged to the energy-absorbing plate 10, and the third turbulence plate 23 is hinged to the energy-absorbing plate 10. The first turbulence plate 21, the second turbulence plate 22, and the third turbulence plate 23 are located on one edge of the energy-absorbing plate 10, forming a double rocker structure, allowing the first turbulence plate 21, the second turbulence plate 22, and the third turbulence plate 23 to rotate flexibly.

[0030] Based on the aforementioned baffle assembly 12, when the fluid impact force acts on the baffle assembly 12, the first sides of the three baffles within a certain plane will continuously rotate relative to each other due to the fluid's action, converting the fluid's impact energy into rotational kinetic energy. Even under the continuous action of the fluid, when the baffle assembly 12 reaches its limit position, because the energy-absorbing plate 10 is rotatably connected to the protected object, the energy-absorbing plate 10 will be subjected to force and rotate, causing the plane of the dual rocker structure to change. Until the rotation angle exceeds ninety degrees, the plate surface of the three baffles receiving the fluid impact is replaced by the second side. The second side begins to receive the fluid impact energy and gradually cancels out the energy accumulated in the original rotation direction until a new reverse rotation is generated. That is, the energy of the fluid impact after the reverse rotation is used to cancel out the fluid energy received in the original rotation direction. This movement is repeated thereafter, achieving the effect of consuming fluid energy through the periodicity of the direction of movement. In addition, outside the limit position, the three baffles and the energy-absorbing plate 10 will continue to rotate under the impact of the fluid. Therefore, at any time and at any position, the three spoilers and energy-absorbing plate 10 can rotate normally, thus playing a role in absorbing energy and reducing vibration from fluid impacts in any direction. Specifically, the rotation of the spoilers absorbs fluid energy and converts it into kinetic energy, and the periodic motion of changing the direction of rotation consumes the rotational kinetic energy of the spoilers, ultimately consuming the fluid energy. On the other hand, the energy dissipation component also rotates continuously, and the continuous friction generated converts the fluid's energy into kinetic energy and further into heat energy for dissipation.

[0031] like Figure 3 As shown, to further improve the vibration reduction performance of the second vibration damping mechanism, and thus the overall vibration damping performance of the vibration damping device, the second vibration damping mechanism includes at least one main mounting rod 27 and at least one first mounting rod 5 fixedly connected to the protected object. A rotating column 6 is rotatably mounted on both the main mounting rod 27 and the first mounting rod 5. Two pressure-bearing balls 28 are mounted on the main mounting rod 27, located at opposite ends of the rotating column 6. Several second energy-absorbing components 7 are mounted on the side wall of the rotating column 6. More specifically, an insertion hole is provided at the axial position of the rotating column 6. The first mounting rod 5 or the main mounting rod 27 is inserted into the insertion hole to mount the rotating column 6 onto the first mounting rod 5 or the main mounting rod 27. The installation of the pressure-bearing balls 28 is the same as that of the rotating column 6 and will not be described further here. Furthermore, the rotating column 6 has several axially extending grooves on its peripheral sidewall. The second energy absorption component 7 includes a damping block 16, which is slidably disposed in the groove. A spring unit is provided between the damping block 16 and each end of the groove. The spring unit includes a second spring 19.

[0032] Based on the aforementioned rotating column 6 and second energy-absorbing component 7, the damping block 16 will move along the length of the groove when subjected to fluid impact. Movement in either direction will compress the second spring 19 on one side and stretch the second spring 19 on the other side. Both second springs 19 absorb energy until the damping block 16 can no longer move. Under conditions such as changes in the flow field, the compressed second springs 19 will recover their deformation, pushing the damping block 16 to the other side. The damping block 16 then continuously reciprocates in the groove under the impact force of the second springs 19 at both ends and the flow field along the axial direction, continuously rubbing against the inner wall of the groove. The energy of the flow field is consumed through the friction generated by the continuous reciprocating motion of the damping block 16. Simultaneously, when the groove is impacted by the flow field in a non-axial direction, the rotating column 6 will acquire torque, thus rotating around the axis, that is, around the first mounting rod 5 or the main mounting rod 27, thereby achieving the effect of absorbing the kinetic energy of the flow field and converting it into rotational kinetic energy, which is then gradually dissipated. On the other hand, the pressure ball 28 can reduce the force on the second energy-absorbing component 7 of the rotating column 6 on the main mounting rod 27. It should also be noted that the main mounting rod 27 is preferably a flexible rod or a rigid part in the middle and flexible parts at both ends, so as to have a certain compression capacity to ensure that the central energy absorption component 26 can play its role.

[0033] Furthermore, to ensure the stability of the damping block 16 during its movement, the spring unit includes a connecting plate 17, which is perpendicular to the slide groove. A second spring 19 is connected between the connecting plate 17 and the end of the slide groove. A portion of the connecting plate 17 extends out of the slide groove and is connected to an extension plate 18. A positioning plate 20, parallel to the slide groove, is provided at each end of the slide groove. During the sliding of the damping block 16, the extension plate 18 can move to the side of the positioning plate 20 facing away from the slide groove. Through the cooperation of the extension plate 18 and the positioning plate 20, the damping block 16 can be restricted, preventing it from tilting in the groove, thereby ensuring the stability of the damping block 16's movement.

[0034] Furthermore, the energy-absorbing plate 10 is installed as follows: the rotating column 6 is connected to the second mounting rod 9 via a hinge 8, and the energy-absorbing plate 10 is fixedly connected to the second mounting rod 9. The rotating column 6 is connected to the second mounting rod 9 via the hinge 8, thereby mounting the energy-absorbing plate 10 on the second mounting rod 9, which allows the energy-absorbing plate 10, the energy dissipation component, and the turbulence-dissipating component 12 to rotate smoothly, thereby fully dissipating fluid energy.

[0035] The present invention further provides a pipeline plugging device, including a plugger 1 and a vibration damping device.

[0036] Blocker 1 is used to seal the pipeline.

[0037] The above-mentioned vibration damping device applied in fluid has a first vibration damping mechanism and a second vibration damping mechanism respectively connected to the two ends of the plug 1.

[0038] Finally, the present invention provides a pipeline plugging method based on the above-mentioned pipeline plugging device, the method comprising S1 to S4.

[0039] S1. Connect the vibration damping device to the sealing device 1.

[0040] S2. Insert the vibration damping device and the plugging device 1 into the pipe to be plugged. The first vibration damping mechanism and the second vibration damping mechanism are distributed along the flow direction of the fluid in the pipe. That is to say, when the plugging device 1 and the vibration damping device move together in the pipe, the fluid will first impact the first vibration damping mechanism and then impact the second vibration damping mechanism.

[0041] S3. Drive the plugger 1 to move along the pipeline and use a vibration damping device for vibration reduction.

[0042] S4. When the plug 1 moves to the target position, the pipe is sealed using the plug 1.

[0043] It should also be noted that the aforementioned plug 1 can be a conventional pipe plug, and the first and second vibration damping mechanisms of the vibration damping device of the present invention can be respectively set at both ends of the plug 1.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vibration damping device applied in fluids, characterized in that, It includes a first damping mechanism and a second damping mechanism arranged along the flow direction of the fluid, and a protective space for accommodating the protected object is formed between the first damping mechanism and the second damping mechanism; The first vibration damping mechanism includes a vibration damping disk (2), which is connected to the protected object through multiple first energy-absorbing components (3). When the vibration damping disk (2) is impacted by fluid, it can compress the first energy-absorbing components (3). The second vibration damping mechanism includes an energy-absorbing plate (10), which is rotatably connected to the protected object. The energy-absorbing plate (10) has multiple mounting holes (11), and an energy-dissipating component is provided in the mounting hole (11). The energy-dissipating component includes two ball bowls (25) with opposite openings, and the bottom of the ball bowls (25) is fixedly connected to the hole wall of the mounting hole (11). A rolling ball (24) is rotatably provided in the ball bowl (25), and the two rolling balls (24) are in contact with each other.

2. The vibration damping device applied in fluid as described in claim 1, characterized in that, The first energy-absorbing component (3) includes an outer sleeve (13) fixedly connected to the protected object, an inner sleeve (14) fixedly connected to the damping disc (2), and a first spring (15) connected between the protected object and the damping disc (2). The first spring (15) is located inside the inner sleeve (14). When the first energy-absorbing component (3) is compressed, the outer sleeve (13) can be fitted onto the inner sleeve (14).

3. The vibration damping device applied in fluid as described in claim 1, characterized in that, A central energy-absorbing component (26) is provided between the energy-absorbing plate (10) and the protected object. The central energy-absorbing component (26) includes an inner tube (30) and an outer tube (29) nested together. A damper is provided inside the inner tube.

4. The vibration damping device applied in fluid as described in claim 1, characterized in that, The energy-absorbing plate (10) is connected to a turbulence-disrupting assembly (12), which includes a first turbulence-disrupting plate (21), a second turbulence-disrupting plate (22), and a third turbulence-disrupting plate (23) arranged in sequence. The second turbulence-disrupting plate (22) is hinged to both the first turbulence-disrupting plate (21) and the third turbulence-disrupting plate (23), and the first turbulence-disrupting plate (21) and the third turbulence-disrupting plate (23) are also hinged to the energy-absorbing plate (10).

5. A vibration damping device applied in fluid as described in claim 1, characterized in that, The second vibration damping mechanism includes at least one main mounting rod (27) and at least one first mounting rod (5) fixedly connected to the protected object. Both the main mounting rod (27) and the first mounting rod (5) are rotatably provided with rotating columns (6), and the main mounting rod (27) is provided with two pressure bearing balls (28). The two pressure bearing balls (28) are located at both ends of the rotating column (6), and a number of second energy absorption components (7) are provided on the side wall of the rotating column (6).

6. A vibration damping device applied in a fluid as described in claim 5, characterized in that, The rotating column (6) has several axially extending grooves on its peripheral sidewall. The second energy absorption component (7) includes a damping block (16), which is slidably disposed in the groove. A spring unit is provided between the damping block (16) and each end of the groove. The spring unit includes a second spring (19).

7. A vibration damping device applied in a fluid as described in claim 6, characterized in that, The spring unit includes a connecting plate (17) that is perpendicular to the slide groove. The second spring (19) is connected between the connecting plate (17) and the end of the slide groove. A portion of the connecting plate (17) extends out of the slide groove and is connected to an extension plate (18). Each end of the slide groove is provided with a positioning plate (20) that is parallel to the slide groove. During the sliding of the damping block (16), the extension plate (18) can move to the side of the positioning plate (20) facing away from the slide groove.

8. A vibration damping device applied in a fluid as described in claim 5, characterized in that, The first mounting rod (5) is connected to the second mounting rod (9) via a hinge (8). The energy-absorbing plate (10) is fixedly connected to the second mounting rod (9). The rotating column (6) is also provided on the second mounting rod (9).

9. A pipe plugging device, characterized in that, include: A plug (1) is used to seal a pipe; A vibration damping device for use in fluids as described in any one of claims 1-8, wherein the first vibration damping mechanism and the second vibration damping mechanism are respectively connected to both ends of the plug (1).

10. A pipe sealing method, characterized in that, Based on the pipeline plugging device as described in claim 9, the method includes: Connect the vibration damping device to the plug (1); The vibration damping device and the plug (1) are placed into the pipe to be plugged, and the first vibration damping mechanism and the second vibration damping mechanism are distributed along the flow direction of the fluid in the pipe; The drive plug (1) moves along the pipeline and is damped by a vibration damping device; When the plug (1) moves to the target position, the pipe is closed using the plug (1).

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