Pipeline vibration isolation device

Abstract

The pipeline vibration isolation device comprises a resonance inner pipe, an inlet vibration isolation connecting piece, an outlet vibration isolation connecting piece, an outer pipe and a plurality of first damping particles, the inlet vibration isolation connecting piece is connected to the inlet end of the resonance inner pipe, and the outlet vibration isolation connecting piece is connected to the outlet end of the resonance inner pipe; the outer pipe is arranged on the outer side of the resonance inner pipe in a sleeving mode and connected with the inlet vibration isolation connecting piece and the outlet vibration isolation connecting piece, an interlayer cavity is formed between the outer pipe and the resonance inner pipe, and the interlayer cavity is filled with the first damping particles. The device has the advantages of being convenient to install, wide in use scene, not limited to straight pipes or reducer pipes and controllable in resonant frequency, vibration transmitted by dynamic equipment and pulsating excitation of media are subjected to vibration reduction and energy consumption through the design of the inlet and outlet vibration isolation connecting piece, the resonance inner pipe and the first damping particles, and the vibration reduction and energy consumption efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of structural vibration damping, and particularly relates to a pipeline vibration isolation device. Background Art

[0002] The pipeline system is an important component unit in the refining, petroleum, and natural gas industries. It consists of a series of pipe fittings connected together, forming a continuous channel for a system that transports liquids, gases, or other fluids.

[0003] Vibration of the moving equipment pipeline is a common problem in the pipeline system. The reasons are relatively complex and generally have the following three main reasons: one is the vibration transmitted from the connected moving equipment; the second is the pulse excitation generated by the medium in the pipeline under the action of connected moving equipment such as compressors, piston pumps, centrifugal pumps, etc.; the third is the medium impact caused by insufficient support of the pipeline system or other elbows and diameter changes. And for the third reason, it can be improved through the optimized design of the pipeline system, while the first two reasons are more common and difficult to solve in engineering.

[0004] Therefore, there is an urgent need for a device that can solve pipeline vibration, especially a pipeline vibration isolation damping device that isolates the vibration of moving equipment and reduces the medium pulse excitation. Summary of the Invention

[0005] In view of the above problems, the purpose of the present invention is to provide a pipeline vibration isolation device to isolate the vibration of moving equipment and reduce the medium pulse excitation.

[0006] To achieve the above purpose, the technical solution proposed by the present invention is as follows: A pipeline vibration isolation device includes a resonant inner pipe, an inlet vibration isolation connector, an outlet vibration isolation connector, an outer pipe, and a number of first damping particles. The resonant inner pipe has an inlet end and an outlet end. The inlet vibration isolation connector is connected to the inlet end of the resonant inner pipe, and the outlet vibration isolation connector is connected to the outlet end of the resonant inner pipe. The outer pipe is sleeved outside the resonant inner pipe and is connected to the inlet vibration isolation connector and the outlet vibration isolation connector. A sandwich cavity is formed between the outer pipe and the resonant inner pipe, and a number of first damping particles are filled in this sandwich cavity.

[0007] Preferably, the axial cross-section of the resonant inner pipe is corrugated.

[0008] Preferably, the resonant inner pipe includes a plurality of wave crest pipe segments that bulge inward, and the plurality of wave crest pipe segments are connected end to end in sequence.

[0009] Preferably, the wave crest pipe segment includes a contraction surface and an expansion surface. The contraction surface extends from the inlet vibration isolation connector towards the outlet vibration isolation connector and gradually contracts inward. The expansion surface extends from the inlet vibration isolation connector towards the outlet vibration isolation connector and gradually expands outward. The starting end of the expansion surface is connected to the terminating end of the contraction surface.

[0010] Preferably, the axial length of the contraction surface is greater than that of the expansion surface.

[0011] Preferably, the contraction surface is an arc-shaped gentle slope surface protruding outward toward the inlet vibration isolation connector, and the expansion surface is an arc-shaped steep slope surface protruding outward toward the outlet vibration isolation connector.

[0012] Preferably, the wave crest spacing between two adjacent wave crest pipe segments ; where is the flow velocity of the medium in the pipeline, is the rotational speed of the dynamic equipment, is the number of cylinders of the dynamic equipment.

[0013] Preferably, the inlet vibration isolation connector and the outlet vibration isolation connector include a flange housing and a number of second damping particles. The flange housing is connected to the outer pipe and the resonant inner pipe, and a number of second damping particles are filled in the flange housing.

[0014] Preferably, the outer pipe is made of carbon steel or stainless steel.

[0015] Adopting the above technical solution, the beneficial effects of the present invention are as follows: The present invention has the advantages of convenient installation, wide application scenarios, not limited to straight pipes or variable-diameter pipes, and controllable resonant frequency. Through the design of the inlet and outlet vibration isolation connectors, the resonant inner pipe and the first damping particles, the vibration transmitted by the dynamic equipment and the pulsating excitation of the medium are damped and energy dissipated, and the damping and energy dissipation efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an assembly schematic diagram of the pipeline vibration isolation device and the pipeline of a certain preferred embodiment of the present invention.

[0017] Figure 2 is Figure 1 an isometric sectional schematic diagram (hiding the first damping particles and the second damping particles) of the pipeline vibration isolation device in

[0018] Figure 3 is Figure 1 a half-sectional schematic diagram of the pipeline vibration isolation device in

[0019] Figure 4 is Figure 3 a structural schematic diagram of the resonant inner pipe in

[0020] Figure 5 is a half-sectional schematic diagram of the pipeline vibration isolation device of another preferred embodiment of the present invention.

[0021] Where: 1. Resonant inner pipe, 2. Inlet vibration isolation connector, 3. Outlet vibration isolation connector, 4. Outer pipe, 5. Interlayer cavity, 6. First damping particle, 7. Wave crest pipe segment, 8. Contraction surface, 9. Expansion surface, 10. Flange housing, 11. Second damping particle, 12. Bolt, 13. Pipeline. Detailed implementation manners

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation manners.

[0023] As Figures 1 to 4 shown, the pipeline vibration isolation device of this embodiment includes: a resonant inner pipe 1, an inlet vibration isolation connector 2, an outlet vibration isolation connector 3, an outer pipe 4, and a first damping particle 6. The outer pipe 4 is sleeved outside the resonant inner pipe 1. The inlet vibration isolation connector 2 is connected to the inlet ends of the outer pipe 4 and the resonant inner pipe 1, and the outlet vibration isolation connector 3 is connected to the outlet ends of the outer pipe 4 and the resonant inner pipe 1, so as to form a sandwich cavity 5 between the outer pipe 4 and the resonant inner pipe 1. A number of first damping particles 6 are filled in the sandwich cavity 5 to form damping. Under the action of the pulse excitation transmitted by the medium, nonlinear collisions occur between the first damping particles 6, between the first damping particles 6 and the outer pipe 4, and between the first damping particles 6 and the resonant inner pipe 1, for energy dissipation.

[0024] Specifically, the inlet vibration isolation connector 2 and the outlet vibration isolation connector 3 of this embodiment are used to connect to the pipeline 13, and they include a flange housing 10 and a number of second damping particles 11. The inside of the flange housing 10 is hollow, and a number of second damping particles 11 are filled in the internal cavity of the flange housing 10. The flange housing 10 can be connected to the pipeline 13 through a matching bolt 12. By adjusting the sizes of the inlet vibration isolation connector 2 and the outlet vibration isolation connector 3, the pipeline vibration isolation device of this embodiment can be installed on a reducing pipe or other special pipelines 13, as Figure 5 shown. The vibration energy is dissipated through the collision of the second damping particles 11, so as to isolate the connected dynamic equipment and prevent vibration from being transmitted to the downstream pipeline 13.

[0025] The resonant inner pipe 1 adopts a pipe wall with a zigzag corrugated design. The resonant inner pipe 1 includes a plurality of wave crest pipe segments 7 that bulge inward and are connected end to end in sequence. Specifically, the wave crest pipe segment 7 includes a contraction surface 8 and an expansion surface 9. The contraction surface 8 extends from the inlet vibration isolation connector 2 towards the outlet vibration isolation connector 3 and gradually contracts inward, and the expansion surface 9 extends from the inlet vibration isolation connector 2 towards the outlet vibration isolation connector 3 and gradually expands outward. The starting end of the expansion surface 9 is connected to the ending end of the contraction surface 8. The axial length a of the contraction surface 8 is greater than the axial length b of the expansion surface 9. The contraction surface 8 protrudes outward towards the inlet vibration isolation connector 2 to form an arc-shaped gentle slope surface, and the expansion surface 9 protrudes outward towards the outlet vibration isolation connector 3 to form an arc-shaped steep slope surface. The resonant inner pipe 1 of this embodiment adopts a corrugated asymmetric design, which can generate a reverse resonant force on the medium flowing through the resonant inner pipe 1.

[0026] Let the distance between the wave crests of two adjacent wave crest pipe segments 7 be When the medium moves at a speed of When passing through, it can be calculated that the time interval for the medium to pass through the wave crest is , and the frequency . For dynamic equipment, there is also a fixed frequency for its pulse excitation during operation . According to the rated flow rate of the medium, the wave crest spacing can be designed to make the two close to each other, generating a resonance effect to partially cancel the excitation load. According to the fixed frequency of the dynamic equipment and the flow rate of the medium, the wave crest spacing can be quickly calculated, that is . By controlling the wave crest spacing of the resonance inner tube 1, the adaptability of the pipeline vibration isolation device to the pipeline 13 can be improved, ensuring that the pipeline vibration isolation device can exert its best vibration reduction and isolation performance, improving the isolation effect, and hindering the downward transmission of vibration.

[0027] The outer tube 4 is the outer wall of the pipeline vibration isolation device of this embodiment, which plays a protective role for the device and can be made of carbon steel or stainless steel according to requirements.

[0028] The first damping particles 6 and the second damping particles 11 can either use metal particles or non-metal particles, and their porosity and filling rate can be specifically adjusted and designed according to requirements.

[0029] Although the present invention is specifically shown and described in conjunction with the preferred implementation embodiments, those skilled in the art should understand that without departing from the spirit and scope of the present invention defined by the appended claims, various changes in form and details made to the present invention are within the protection scope of the present invention.

Claims

1. A pipeline vibration isolation device, characterized in that: include: A resonant inner tube (1) having an inlet end and an outlet end; An inlet vibration isolation connector (2) connected to the inlet end of the resonant inner tube (1); An outlet vibration isolation connector (3) connected to the outlet end of the resonant inner tube (1); An outer tube (4) is sleeved on the outer side of the resonant inner tube (1) and connected to the inlet vibration isolation connector (2) and the outlet vibration isolation connector (3), and an interlayer cavity (5) is formed between the outer tube (4) and the resonant inner tube (1); A plurality of first damping particles (6) are filled in the interlayer cavity (5).

2. The pipeline vibration isolation device according to claim 1, characterized in that: The axial cross-section of the resonant inner tube (1) is corrugated.

3. The pipeline vibration isolation device according to claim 2, characterized in that: The resonant inner tube (1) comprises a plurality of inwardly bulging wave peak tube sections (7), and the plurality of wave peak tube sections (7) are sequentially connected end to end.

4. The pipeline vibration isolation device according to claim 3, characterized in that: The peak pipe section (7) comprises: A contraction surface (8), wherein the contraction surface (8) extends from the inlet vibration isolation connector (2) toward the outlet vibration isolation connector (3) and gradually contracts inward; An expansion surface (9), wherein the expansion surface (9) extends from the inlet vibration isolation connector (2) toward the outlet vibration isolation connector (3) and gradually expands outward, and the starting end of the expansion surface (9) is connected to the ending end of the contraction surface (8).

5. The pipeline vibration isolation device according to claim 4, characterized in that: The axial length of the contraction surface (8) is greater than the axial length of the expansion surface (9).

6. The pipeline vibration isolation device according to claim 4, characterized in that: The contraction surface (8) is an arc-shaped gentle slope surface convex outward toward the inlet vibration isolation connector (2), and the expansion surface (9) is an arc-shaped steep slope surface convex outward toward the outlet vibration isolation connector (3).

7. The pipeline vibration isolation device according to any one of claims 3 to 6, characterized in that: The peak spacing between two adjacent peak pipe sections (7) ;in, is the flow velocity of the medium in pipe (13), is the speed of the moving equipment, is the number of cylinders of the moving equipment.

8. The pipeline vibration isolation device according to claim 1, characterized in that: The inlet vibration isolation connector (2) and the outlet vibration isolation connector (3) include: a flange shell (10) connected to the outer tube (4) and the resonant inner tube (1), and a plurality of second damping particles (11) filled in the flange shell (10).

9. The pipeline vibration isolation device according to claim 1, characterized in that: The outer tube (4) is made of carbon steel or stainless steel.

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