A vibration-damping pipe for fluid pipelines

Abstract

The present invention proposes a vibration-damping pipe for fluid pipelines, which relates to the technical field of vibration-damping pipes, including: a bellows, the bellows having a plurality of staggered outer corrugation troughs and inner corrugation troughs arranged at equal intervals; a pressure ring arranged in the outer corrugation trough and the inner corrugation trough; a sealing plate fixedly connected to both ends of the bellows; a first pipe inserted into one end of the bellows having a length of 1 / 2 of the total length of the bellows; a second pipe inserted into the other end of the bellows having a length of 1 / 4 of the total length of the bellows. The present invention effectively enhances the structural strength and pressure resistance of the bellows by arranging pressure rings at the inner and outer circumferences of the bellows and rationally designs the insertion lengths of the first pipe and the second pipe, eliminates the low frequency of the passage when the expansion ratio is even, optimizes the dynamic characteristics of the bellows, improves its vibration reduction effect in high-pressure fluid systems in response to complex vibration environments, and avoids the problem of decreased vibration reduction effect after long-term use.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration-damping pipes, and in particular to a vibration-damping pipe for a fluid pipeline. Background Art

[0002] Vibration is a common and significant challenge in high-pressure fluid piping systems. As a key carrier for transmitting mass flow, energy flow, and momentum flow, vibration in fluid piping systems primarily stems from the following two factors:

[0003] On the one hand, there is vibration transmission caused by mechanical equipment. Fluid piping systems are often directly connected to various power machines (such as diesel engines, air compressors, pumps, and fans). Due to poor structural dynamic balance or improper foundation design, these power machines often induce mechanical vibrations. These vibrations are transmitted through the connected pipes to the entire piping system, causing vibration diffusion within the system.

[0004] On the other hand, there are vibrations caused by fluid pulsation. The intermittent motion characteristics of power machinery (such as intermittent oil injection in oil pumps, and the rotational or reciprocating motion of pumps, air compressors, and fans) can also induce vibrations in pipelines. In fluid pipelines, due to the pulsation of the flow and pressure of the fluid medium, when the fluid passes through components such as elbows, reducers, various valves, or blind plates in the pipeline, these pulsations will exert periodic interference forces on the pipeline components, causing the fluid pulsation energy to be converted into mechanical vibration energy of the pipeline component structure, thereby initiating and spreading vibrations throughout the pipeline system.

[0005] Although existing vibration-damping nozzles can alleviate vibration problems to a certain extent, they still have many shortcomings. Traditional vibration-damping nozzles are usually unable to effectively cope with the complex vibration environment in high-pressure fluid systems because their design cannot be optimized for the characteristics of specific vibration sources, resulting in a significant decrease in vibration reduction effect after long-term use. In addition, the design of traditional vibration-damping nozzles often fails to fully consider the needs of low-rigidity structures, making it difficult to avoid the characteristic frequencies of the vibration source, resulting in poor vibration isolation effects. At the same time, existing vibration-damping nozzles have limited ability to eliminate the effects of fluid pulsation and sound waves, making it difficult to ensure the comprehensive optimization of the displacement compensation, vibration attenuation, and noise reduction performance of the pipeline system. Summary of the Invention

[0006] In view of this, the present invention proposes a vibration-damping pipe for fluid pipelines, aiming to solve the problems of existing vibration-damping pipes being poor in coping with complex vibration environments in high-pressure fluid systems, reduced vibration-damping effects after long-term use, and lacking low-rigidity design.

[0007] The technical solution of the present invention is achieved as follows:

[0008] The present invention provides a vibration-damping pipe for a fluid pipeline, comprising:

[0009] A bellows having a plurality of staggered outer corrugation troughs and inner corrugation troughs arranged at equal intervals;

[0010] A pressure ring is arranged in the outer trough of the corrugation and the inner trough of the corrugation;

[0011] Two sealing plates are provided in parallel and fixedly connected to both ends of the bellows in the axial direction;

[0012] A first connecting pipe, at least a portion of which is coaxially inserted into one end of the bellows and fixedly connected to the sealing plate, and the length of the first connecting pipe inserted into the bellows is 1 / 2 of the total length of the bellows;

[0013] At least a portion of the second connecting pipe is coaxially inserted into the other end of the bellows and fixedly connected to the sealing plate, and the length of the second connecting pipe inserted into the bellows is 1 / 4 of the total length of the bellows.

[0014] On the basis of the above technical solution, preferably, the outer trough of the corrugation is located on the outer surface of the corrugated tube, and the inner trough of the corrugation is located on the inner surface of the corrugated tube. The outer trough of the corrugation and the inner trough of the corrugation of the corrugated tube are arranged alternately, thereby forming an staggered corrugated structure on the cross section of the corrugated tube, and the corrugated structure is located in the center of the corrugated tube.

[0015] Furthermore, preferably, the horizontal spacing between the outer troughs of the corrugations and the inner troughs of the corrugations is equal, and the distance from the outer troughs of the corrugations to the outer surface of the corrugated tube is equal to the distance from the inner troughs of the corrugations to the outer surface of the corrugated tube.

[0016] Further, preferably, the outer trough of the corrugation of the bellows has a radius Rw, the inner trough of the corrugation has a radius Rn, and Rw-δ=Rn, wherein δ is the thickness of the bellows wall.

[0017] Further, preferably, the relationship between the wave width a and the wave intercept Q of the corrugated tube is a=1 / 2Q, wherein the wave width a refers to the lateral distance between one wave peak and an adjacent wave peak, and the wave intercept Q refers to the same position of two adjacent waves.

[0018] On the basis of the above technical solution, preferably, it also includes a metal mesh sleeve, which is covered on the outside of the corrugated tube, the outer trough of the corrugation is in contact with the inner wall of the metal mesh sleeve, and the edge of the sealing plate extends outward and is fixedly connected to the metal mesh sleeve.

[0019] On the basis of the above technical solution, preferably, the diameters of the first connecting pipe and the second connecting pipe are the same, and the diameters of the first connecting pipe and the second connecting pipe are 1 / 2 of the diameter of the corrugated pipe.

[0020] On the basis of the above technical solution, preferably, the pressure ring is a rigid solid circular ring, and the outer diameter of the pressure ring is equal to the radius Rn of the inner trough of the corrugation.

[0021] On the basis of the above technical solution, preferably, the bellows is a metal hose made of stainless steel, elastic alloy material or high-temperature alloy material.

[0022] On the basis of the above technical solution, preferably, the first connecting pipe and the second connecting pipe are both provided with a connecting portion at one end away from the corrugated pipe, and the connecting portion is used to connect to a pipeline or equipment.

[0023] The present invention has the following beneficial effects compared to the prior art:

[0024] (1) The vibration-damping connecting pipe for fluid pipelines disclosed in the present invention effectively enhances the structural strength and pressure resistance of the bellows by arranging pressure rings at the inner and outer circumferences of the bellows and rationally designs the insertion lengths of the first connecting pipe and the second connecting pipe, eliminates the low frequency of the passage when the expansion ratio is even multiple, optimizes the dynamic characteristics of the bellows, improves its vibration-damping effect in high-pressure fluid systems in response to complex vibration environments, avoids the problem of decreased vibration-damping effect after long-term use, and realizes a low-rigidity design to ensure the long-term stability and reliability of the bellows.

[0025] (2) By making the horizontal spacing between the outer troughs of the corrugation and the inner troughs of the corrugation equal, and their distances from the outer surface of the bellows equal, the bellows is made more symmetrical and uniform in structure, avoiding stress concentration and uneven deformation caused by structural asymmetry. The evenly distributed wave structure can more effectively disperse and absorb vibration energy, reduce vibration transmission, and improve the vibration reduction effect of the bellows. This setting helps to maintain excellent vibration reduction performance under high pressure and complex vibration environments. The symmetrical and uniform corrugated structure helps to smooth the flow of fluid, reduce turbulence and flow resistance, and improve the efficiency and stability of the fluid pipeline system. At the same time, it can effectively reduce the impact and wear of the fluid on the inner wall of the bellows, reduce noise, extend the service life of the bellows, and improve the quiet effect of the system.

[0026] (3) The symmetrical and uniform corrugated structure helps to absorb and disperse vibration energy more effectively, reduce vibration transmission, and improve the vibration reduction effect of the bellows, especially in high-pressure and complex vibration environments. The design of the radius relationship makes the stress distribution of the bellows uniform during repeated stress and deformation, reduces deformation and fatigue caused by local stress concentration, and extends the service life of the bellows. The radius relationship between the inner and outer troughs optimizes the internal flow channel structure of the bellows, reduces the resistance and turbulence of the fluid flow, and improves the stability and efficiency of the fluid flow.

[0027] (4) The clear relationship between the wave width and the corrugation intercept makes the corrugated structure of the bellows more uniform and regular, ensuring that the bellows has consistent mechanical properties when subjected to stress. The uniform corrugated structure helps to more effectively disperse and absorb vibration energy, reduce vibration transmission, and improve the vibration reduction effect. This design is particularly suitable for high-pressure fluid systems that require high vibration reduction performance. By designing the relationship between the wave width and the corrugation intercept, the bellows can be uniformly stressed when deformed, improving its flexibility and reducing fatigue and damage caused by local stress concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a schematic planar structural diagram of the vibration-damping connecting pipe for fluid pipelines disclosed in the present invention;

[0030] Reference numerals:

[0031] 1. Bellows; 11. Outer trough of corrugation; 12. Inner trough of corrugation; 2. Pressure ring; 3. Closing plate; 4. First connecting pipe; 5. Second connecting pipe; 6. Wire mesh sleeve; S. Connecting part. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] like Figure 1 As shown, the present invention discloses a shock-absorbing connecting pipe for a fluid pipeline, comprising a bellows 1, a pressure ring 2, a sealing plate 3, a first connecting pipe 4 and a second connecting pipe 5.

[0034] The bellows 1 features multiple, staggered outer and inner troughs 11 and 12, arranged at equal intervals. This provides excellent elastic deformation capability, allowing the corrugated structure to effectively absorb and mitigate vibration energy, reducing vibration transmission. The staggered corrugation design enhances the flexibility and stability of the structure, improving the overall vibration reduction effect.

[0035] In this embodiment, the bellows 1 is a metal hose made of stainless steel, elastic alloy material, or high-temperature alloy material.

[0036] Pressure ring 2, located within outer corrugation trough 11 and inner corrugation trough 12, enhances the pressure-bearing capacity of bellows 1. The design of pressure ring 2 enables bellows 1 to withstand sufficient positive and negative pressures. Therefore, this design can be used in both positive and negative pressure piping systems, ensuring the stability and safety of bellows 1 in high-pressure and low-pressure environments, and expanding the applicability of vibration-damping pipes.

[0037] Specifically, the pressure ring 2 at the inner circle is set within the inner trough 12 of the corrugation. Under positive pressure, the internal fluid pressure will exert an expansion force on the inner wall of the bellows 1. The pressure ring 2 at the inner circle prevents the inner wall of the bellows 1 from over-expanding by increasing the inner wall strength of the bellows 1. Under negative pressure, the internal fluid pressure is lower than the external environmental pressure, causing the inner wall to be subjected to a compressive force. The pressure ring 2 at the inner circle prevents the inner wall from shrinking and deforming by enhancing the inner wall's resistance to compression. The pressure ring 2 within the inner trough 12 of the corrugation provides additional support, enhancing the rigidity of the inner wall of the bellows 1, allowing it to remain stable in both high-pressure and low-pressure environments.

[0038] The outer pressure ring 2 is positioned within the outer trough 11 of the corrugation. Under positive pressure, the outer wall is subject to the expansion force of the internal fluid. The outer pressure ring 2 strengthens the outer wall of the bellows 1, preventing it from over-expanding. Under negative pressure, the outer wall is subject to the compressive force of the external environmental pressure. The outer pressure ring 2 strengthens the outer wall's resistance to compression, preventing it from collapsing. The outer pressure ring 2 provides additional support, enhancing the overall structural strength of the bellows 1 and keeping it stable and reliable under various pressure conditions.

[0039] The design of the pressure ring 2 at the inner and outer circles provides additional support and rigidity by enhancing the inner and outer wall strength of the bellows 1, significantly improving the pressure-bearing capacity and stability of the bellows 1, ensuring that it can maintain good vibration reduction effect and long-term reliability in both positive and negative pressure environments.

[0040] Two parallel sealing plates 3 are fixedly connected to the axial ends of the bellows 1. The sealing plates 3 effectively seal the ends of the bellows 1 to prevent fluid leakage, while providing a stable connection structure to ensure the fixation and vibration reduction effect of the bellows 1 in a vibrating environment. In addition, they also provide a mounting base for the first connecting pipe 4 and the second connecting pipe 5.

[0041] In this embodiment, the sealing plate 3 is a disc structure, and can be sealed and connected to the end of the bellows 1 by welding.

[0042] In order to enable equipment or pipelines to be connected to the vibration-damping bellows 1 , this embodiment further provides a first connecting pipe 4 and a second connecting pipe 5 at both ends of the bellows 1 .

[0043] In the bellows 1, resonances of specific frequencies occur during vibration transmission. These resonant frequencies significantly increase the vibration amplitude of the bellows 1, forming frequency dips. The fundamental frequency and its harmonics (odd and even harmonics) are the frequencies most likely to cause resonance. The fundamental frequency is the lowest frequency vibration mode inherent to the bellows 1. Harmonies that are integer multiples of the fundamental frequency, both odd and even harmonics, can cause resonance.

[0044] The dynamic characteristics and vibration behavior of the bellows 1 play a crucial role in fluid piping systems. By rationally designing the insertion lengths of the first and second pipes 4 and 5, the frequency dips at even-multiple expansion ratios can be effectively eliminated, optimizing the dynamic characteristics of the bellows 1 and improving its vibration damping effect.

[0045] In this embodiment, at least a portion of the first connecting pipe 4 is coaxially inserted into one end of the bellows 1 and fixedly connected to the sealing plate 3, and the length of the first connecting pipe 4 inserted into the bellows 1 is 1 / 2 of the total length of the bellows 1; by inserting a length of 1 / 2 of the total length of the bellows 1, the first connecting pipe 4 can form a fixed node at the center position of the bellows 1, and this fixed node can effectively destroy the vibration mode of odd-numbered frequencies, reduce the energy accumulation of odd-numbered frequency vibrations, thereby eliminating the frequency trough, reducing the amplitude of odd-numbered frequency vibrations, and optimizing the dynamic characteristics of the bellows 1.

[0046] At least a portion of the second connecting pipe 5 is coaxially inserted into the other end of the bellows 1 and fixedly connected to the sealing plate 3. The length of the second connecting pipe 5 inserted into the bellows 1 is 1 / 4 of the total length of the bellows 1. By inserting 1 / 4 of the total length of the bellows 1, the second connecting pipe 5 can form another fixed node at a quarter of the position of the bellows 1. This fixed node can effectively destroy the vibration mode of even-multiple frequencies, reduce the energy accumulation of even-multiple frequency vibrations, and thus eliminate the pass-through frequency trough.

[0047] By rationally designing the insertion lengths of the first and second connecting pipes 4 and 5, the dynamic characteristics of the bellows 1 are significantly optimized, effectively eliminating the frequency dips at both odd and even expansion ratios. This design enhances the vibration damping effect of the bellows 1 and strengthens its structural stability, resulting in superior performance in both high- and low-pressure fluid piping systems.

[0048] The vibration-damping connecting pipe for fluid pipelines disclosed in the present invention effectively enhances the structural strength and pressure resistance of the bellows 1 by arranging pressure rings 2 at the inner and outer circles of the bellows 1 and reasonably designs the insertion lengths of the first connecting pipe 4 and the second connecting pipe 5, eliminates the low frequency of the passage when the expansion ratio is even, optimizes the dynamic characteristics of the bellows 1, improves its vibration-damping effect in coping with complex vibration environments in high-pressure fluid systems, avoids the problem of decreased vibration-damping effect after long-term use, and realizes a low-rigidity design to ensure the long-term stability and reliability of the bellows 1.

[0049] It's worth noting that the first pipe 4 serves as the fluid inlet, while the second pipe 5 serves as the fluid outlet. When fluid flows into the first pipe, its deeper insertion allows for a smoother transition into the bellows, reducing the excitation of the bellows by flow instabilities and thus optimizing vibration damping. Fluid then flows out of the shallower second pipe, where the shallower insertion reduces resistance to outflow and ensures a smoother transition.

[0050] When designing vibration-damping nozzles for fluid pipelines, ensuring that the fluid flows in through the first nozzle and out through the second nozzle effectively optimizes the flow direction. This design plays a positive role in stabilizing flow, reducing turbulence and pulsation, evenly distributing stress, regulating vibration frequency, and reducing energy loss, thereby enhancing vibration reduction and improving structural stability and safety.

[0051] In this embodiment, the outer corrugation trough 11 is located on the outer surface of the corrugated tube 1, and the inner corrugation trough 12 is located on the inner surface of the corrugated tube 1. The outer corrugation trough 11 and the inner corrugation trough 12 of the corrugated tube 1 are arranged alternately, thereby forming an staggered corrugated structure on the cross section of the corrugated tube 1.

[0052] Using this technical solution, the alternating arrangement of the corrugated structure effectively disperses and absorbs vibration energy, reducing vibration transmission and enhancing the vibration damping effect of the bellows 1. The alternating arrangement of the outer and inner troughs 11 and 12 allows the bellows 1 to more evenly distribute stress when subjected to force, reducing stress concentration and improving the fatigue resistance of the bellows 1. The staggered arrangement of the corrugated structure enhances the structural rigidity of the bellows 1, enabling it to maintain its shape and stability under high pressure and complex vibration environments.

[0053] In this example, the corrugated structure is located at the center of the bellows 1, ensuring that the bellows 1 has good flexibility and elasticity when subjected to force and deformation.

[0054] As some preferred embodiments, the horizontal spacing between the outer corrugation troughs 11 and the inner corrugation troughs 12 is equal. This structural arrangement ensures that the outer corrugation troughs 11 and the inner corrugation troughs 12 are evenly distributed across the cross-section of the bellows 1, forming a regular and symmetrical corrugated structure. The distance from the outer corrugation troughs 11 to the outer surface of the bellows 1 is equal to the distance from the inner corrugation troughs 12 to the outer surface of the bellows 1. In the figure, the distance from the outer corrugation troughs 11 to the outer surface of the bellows 1 is h1, and the distance from the inner corrugation troughs 12 to the outer surface of the bellows 1 is also h2. This arrangement keeps the outer corrugation troughs 11 and the inner corrugation troughs 12 at the same distance relative to the outer surface of the bellows 1, ensuring the symmetry and uniformity of the bellows 1 when subjected to force and deformation.

[0055] In this embodiment, the horizontal spacing between the outer troughs 11 and the inner troughs 12 of the corrugations is equal, and their distances from the outer surface of the bellows 1 are equal, making the bellows 1 more symmetrical and uniform in structure, avoiding stress concentration and uneven deformation caused by structural asymmetry. The evenly distributed wave structure can more effectively disperse and absorb vibration energy, reduce vibration transmission, and improve the vibration reduction effect of the bellows 1. This setting helps to maintain excellent vibration reduction performance under high pressure and complex vibration environments. The symmetrical and uniform corrugated structure helps to smooth the flow of fluid, reduce turbulence and flow resistance, and improve the efficiency and stability of the fluid pipeline system. At the same time, it can effectively reduce the impact and wear of the fluid on the inner wall of the bellows 1, reduce noise, extend the service life of the bellows 1, and improve the quiet effect of the system.

[0056] In some preferred embodiments, the outer trough 11 of the corrugation of the bellows 1 has a radius Rw, and the inner trough 12 has a radius Rn, with Rw - δ = Rn, where δ is the wall thickness of the bellows 1. By setting the radius relationship between the outer trough 11 and the inner trough 12, the difference in radius between the inner and outer troughs of the bellows 1 is equal to the wall thickness, ensuring the geometric symmetry and structural uniformity of the bellows 1. This arrangement allows the inner and outer troughs of the bellows 1 to evenly distribute stress when subjected to force, reducing stress concentration and improving the overall strength and rigidity of the bellows 1.

[0057] The symmetrical and uniform corrugated structure helps more effectively absorb and disperse vibration energy, reducing vibration transmission and enhancing the vibration damping effect of the bellows 1, particularly in high-pressure and complex vibration environments. The designed radius relationship ensures uniform stress distribution during repeated stress and deformation, reducing deformation and fatigue caused by localized stress concentration and extending the service life of the bellows 1. The radius relationship between the inner and outer troughs optimizes the internal flow path structure of the bellows 1, reducing fluid flow resistance and turbulence, and improving fluid flow stability and efficiency.

[0058] As some preferred embodiments, the relationship between the wave width a and the wave intercept Q of the corrugated tube 1 is a=1 / 2Q, where the wave width a refers to the lateral distance between one wave peak to the adjacent wave peak, and the wave intercept Q refers to the same position of two adjacent corrugations.

[0059] The above technical solution, with its clear relationship between wave width and wave intercept, ensures a more uniform and regular wave structure for the bellows 1, ensuring consistent mechanical properties when subjected to stress. This uniform wave structure helps to more effectively disperse and absorb vibration energy, reducing vibration transmission and improving vibration damping. This design is particularly suitable for high-pressure fluid systems requiring high vibration damping performance. By designing the relationship between wave width and wave intercept, the bellows 1 is able to evenly distribute stress during deformation, improving its flexibility and reducing fatigue and damage caused by localized stress concentration.

[0060] The vibration-damping pipe for fluid pipeline disclosed in the present invention also includes a metal mesh sleeve 6, which is wrapped around the outside of the corrugated pipe 1, and the outer trough 11 of the corrugation is in contact with the inner wall of the metal mesh sleeve 6. The edge of the sealing plate 3 extends outward and is fixedly connected to the metal mesh sleeve 6.

[0061] Using the above technical solution, the wire mesh sleeve 6 is wrapped around the outside of the bellows 1, providing additional support and protection, enhancing the overall strength and stability of the bellows 1, and preventing the bellows 1 from deforming or rupturing under high pressure or high vibration environments. The wire mesh sleeve 6 is in close contact with the bellows 1, increasing the vibration damping performance of the vibration damping pipe. The wire mesh sleeve 6 can effectively absorb and disperse external vibration energy, reduce vibration transmission, and improve the overall vibration damping effect. The presence of the wire mesh sleeve 6 enables the bellows 1 to more evenly disperse pressure when subjected to internal and external pressure, reducing local stress concentration and improving the pressure resistance of the bellows 1.

[0062] Pipe diameter has a significant impact on fluid flow. The velocity of a fluid in a pipe is inversely proportional to its diameter; as the diameter decreases, the flow rate increases. Increased flow rate increases the fluid's kinetic energy. Increased kinetic energy means greater pulsation and turbulence during flow. Increased flow rate intensifies fluid pulsation. Pulsation is a manifestation of unstable fluid flow and can easily lead to energy loss. Higher flow rates can easily cause turbulence, which increases frictional resistance and energy loss. Turbulence also causes pressure fluctuations, further increasing pulsation losses.

[0063] The solution adopted in this embodiment is to set the diameters of the first connecting pipe 4 and the second connecting pipe 5 to be the same, and the diameters of the first connecting pipe 4 and the second connecting pipe 5 are 1 / 2 of the diameter of the corrugated pipe 1. Figure 1In the diagram, the diameter of the first and second connecting pipes 4 and 5 is D1, and the diameter of the bellows 1 is D2. Here, D1 = 1 / 2D2. This reduces the pipe diameter by half as the fluid exits the bellows 1 and enters the connecting pipe, significantly increasing the flow rate. The transition area from the bellows 1 to the connecting pipe is a critical region for flow rate variation. In this region, the fluid undergoes an acceleration process, which is prone to turbulence and pulsation. By properly designing the pipe diameter, the adverse effects of flow rate variations can be minimized as the fluid enters the connecting pipe from the bellows 1, thereby reducing the pulsation loss rate.

[0064] In some preferred embodiments, the pressure ring 2 is a rigid, solid circular ring. Its rigid, solid design provides strong structural support, enhancing the bellows 1's ability to withstand both internal and external pressures while reducing deformation caused by pressure fluctuations. The outer diameter of the pressure ring 2 is equal to the radius Rn of the inner trough 12 of the corrugation, ensuring a close fit between the pressure ring 2 and the bellows 1, providing uniform support and restraint.

[0065] Because the outer diameter of the pressure ring 2 is equal to the radius of the inner trough 12 of the corrugation, the pressure is evenly distributed across the inner and outer surfaces of the bellows 1 when subjected to stress, reducing localized stress concentration and improving overall structural stability. This uniform force distribution helps minimize deformation and fatigue during repeated stress exposure, extending the service life of the bellows 1. The pressure ring 2 provides stable support, enabling the bellows 1 to more effectively absorb and disperse vibration energy in a vibrating environment, reducing vibration transmission and improving vibration damping.

[0066] In order to facilitate the connection between the first connecting pipe 4, the second connecting pipe 5 and the pipeline or equipment, this embodiment also provides a connecting portion S on the end of the first connecting pipe 4 and the second connecting pipe 5 away from the corrugated pipe 1. As one embodiment, the connecting portion S is a connecting flange. As another embodiment, the connecting portion S is an internal thread provided on the inner wall of the first connecting pipe 4 and the second connecting pipe 5, which is convenient for connection by threaded connection.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vibration-damping pipe for a fluid pipeline, characterized in that: include: A bellows (1), wherein the bellows (1) has a plurality of staggered corrugation outer troughs (11) and corrugation inner troughs (12) arranged at equal intervals; A pressure ring (2) is arranged in the outer trough (11) and the inner trough (12) of the corrugation; Two sealing plates (3) are provided in parallel and are respectively fixedly connected to both ends of the bellows (1) in the axial direction; A first connecting pipe (4), at least a portion of which is coaxially inserted into one end of the bellows (1) and fixedly connected to the sealing plate (3), and a length of the first connecting pipe (4) inserted into the bellows (1) is 1 / 2 of the total length of the bellows (1); At least a portion of the second connecting pipe (5) is coaxially inserted into the other end of the bellows (1) and fixedly connected to the sealing plate (3), and the length of the second connecting pipe (5) inserted into the bellows (1) is 1 / 4 of the total length of the bellows (1).

2. The vibration-damping pipe for fluid pipelines according to claim 1, characterized in that: The outer corrugation troughs (11) are located on the outer surface of the corrugated tube (1), and the inner corrugation troughs (12) are located on the inner surface of the corrugated tube (1). The outer corrugation troughs (11) and the inner corrugation troughs (12) of the corrugated tube (1) are arranged alternately, thereby forming a staggered corrugated structure on the cross section of the corrugated tube (1), and the corrugated structure is located at the center of the corrugated tube (1).

3. The vibration-damping pipe for fluid pipelines according to claim 2, characterized in that: The horizontal spacing between the outer corrugation trough (11) and the inner corrugation trough (12) is equal, and the distance from the outer corrugation trough (11) to the outer surface of the corrugated tube (1) is equal to the distance from the inner corrugation trough (12) to the outer surface of the corrugated tube (1).

4. The vibration-damping pipe for fluid pipelines according to claim 3, characterized in that: The outer corrugation trough (11) of the bellows (1) has a radius Rw, the inner corrugation trough (12) has a radius Rn, and Rw-δ=Rn, wherein δ is the wall thickness of the bellows (1).

5. The vibration-damping pipe for fluid pipelines according to claim 3, characterized in that: The relationship between the corrugation width a and the corrugation intercept Q of the corrugated tube (1) is a=1 / 2Q, wherein the corrugation width a refers to the lateral distance between one corrugation peak and an adjacent corrugation peak, and the corrugation intercept Q refers to the same position of two adjacent corrugations.

6. The vibration-damping pipe for fluid pipelines according to any one of claims 2 to 5, characterized in that: It also includes a metal mesh sleeve (6), the metal mesh sleeve (6) is covered on the outside of the corrugated tube (1), the outer trough (11) of the corrugation is in contact with the inner wall of the metal mesh sleeve (6), and the edge of the sealing plate (3) extends outward and is fixedly connected to the metal mesh sleeve (6).

7. The vibration-damping pipe for fluid pipelines according to claim 2, characterized in that: The first connecting pipe (4) and the second connecting pipe (5) have the same pipe diameter, and the pipe diameter of the first connecting pipe (4) and the second connecting pipe (5) is 1 / 2 of the pipe diameter of the corrugated pipe (1).

8. The vibration-damping pipe for fluid pipelines according to claim 4, characterized in that: The pressure-bearing ring (2) is a rigid solid circular ring, and the outer diameter of the pressure-bearing ring (2) is equal to the radius Rn of the inner trough (12) of the corrugation.

9. The vibration-damping pipe for fluid pipelines according to any one of claims 1 to 5, characterized in that: The bellows (1) is a metal hose made of stainless steel, elastic alloy material or high-temperature alloy material.

10. The vibration-damping pipe for fluid pipelines according to claim 1 or 7, characterized in that: The first connecting pipe (4) and the second connecting pipe (5) are both provided with a connecting portion (S) at one end away from the corrugated pipe (1), and the connecting portion (S) is used for connecting to a pipeline or equipment.

Images