Low-rigidity spring type supporting structure pipeline for axial vibration isolation

Abstract

The invention discloses a low-rigidity spring type supporting structure pipeline for axial vibration isolation, and relates to the field of vibration and noise reduction. The problems that an existing pipeline is large in vibration and loud in noise when transporting media are solved. The device comprises a supporting structure pipeline (A), a plurality of flanges and a connecting assembly. The support structure pipeline (A) comprises a rubber coating layer (1) and a plurality of periodic structures (2), the plurality of periodic structures (2) are sequentially connected in series from top to bottom, the rubber coating layer (1) coats the plurality of periodic structures (2) to form a columnar artificial periodic structure with band gap characteristics, and the periodic structures (2) are chiral structures; the multiple flanges are installed on the outer circumferential side wall of the supporting structure pipeline (A) from top to bottom, and the multiple flanges are connected through the connecting assemblies. The supporting structure pipeline has the low-frequency band gap characteristic and has the excellent vibration and noise reduction performance. The invention is applied to the field of seawater pipeline systems such as ships, submarines and the like, and realizes the low-frequency band gap characteristic by using the periodic unit structure.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration reduction and noise reduction, and in particular to axial vibration isolation technology, and specifically to a low-rigidity spring-type support structure pipeline for axial vibration isolation. The low-rigidity axial vibration isolation effect is achieved by utilizing an intermittent rod spring-type support structure design. Background Art

[0002] Pipeline systems are widely used in military, scientific research and people's daily life, mainly used to transmit mass flow, momentum flow or energy flow. Pipeline systems are prone to fluid-solid coupling effects during operation, which in turn produce strong vibrations and noise, which will have a serious impact on the safety of equipment connected to the pipeline system and the comfort of the surrounding environment, and even cause huge losses. Research on the vibration characteristics of space pipeline systems can provide certain theoretical support and solutions for vibration and noise reduction of pipeline systems. A large number of scientific researchers have proposed a variety of vibration reduction methods and methods for vibration and noise reduction of pipeline systems and conducted analytical research. This is of great significance to the improvement of the country's comprehensive strength, the sustainable development of society and the comprehensive utilization of resources.

[0003] With the rapid development of modern industrial technology, pipeline transportation systems have become an indispensable part of industrial production and daily life. However, with the widespread application of pipeline systems, the vibration and noise problems generated by pipelines in the process of transporting media have become increasingly prominent and have become a technical problem that needs to be solved urgently.

[0004] When the pipeline is transporting the medium, a lot of noise will be generated due to factors such as the interaction between the fluid and the pipe wall, the turbulent movement of the fluid, and the vibration of the pipeline system. These noises will not only pollute the surrounding environment and affect people's normal life and work, but may also damage the pipeline system itself and shorten its service life. Therefore, how to reduce the vibration and noise during pipeline transportation has become an urgent problem that needs to be solved.

[0005] In summary, existing pipelines have problems of large vibration and loud noise when transporting media. Summary of the invention

[0006] The purpose of the present invention is to solve the problem of large vibration and loud noise in existing pipelines when transporting media, and further provide a low-rigidity spring-type support structure pipeline for axial vibration isolation.

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

[0008] A low-rigidity spring-type support structure pipeline for axial vibration isolation, comprising a support structure pipeline, multiple flanges and a connecting assembly; the support structure pipeline comprises a rubber coating layer and multiple periodic structures, the multiple periodic structures are sequentially connected in series from top to bottom, the rubber coating layer is coated on the multiple periodic structures to form a columnar artificial periodic structure with a band gap characteristic, wherein the periodic structure is a chiral structure skeleton; multiple flanges are installed on the outer circumferential side wall of the support structure pipeline A from top to bottom, and the multiple flanges are connected by the connecting assembly.

[0009] Furthermore, the chiral structure skeleton includes an upper thin plate, a hollow cylinder, a lower thin plate and two artificial periodic structure layers. The upper thin plate, the hollow cylinder and the lower thin plate are arranged coaxially from top to bottom, and the hollow cylinder is connected to the upper thin plate and the lower thin plate respectively through an artificial periodic structure layer.

[0010] Furthermore, the artificial periodic structure layer includes a plurality of chiral structure unit cells, which are arranged in a ring array, wherein one end of the plurality of chiral structure unit cells is connected to the hollow cylinder, and the other end of the plurality of chiral structure unit cells is connected to the upper thin plate or the lower thin plate.

[0011] Preferably, the chiral structure unit cell comprises a cylinder and two oblique arms, and the two oblique arms are axially symmetrically mounted on the outer circumferential side wall of the cylinder.

[0012] Preferably, the number of the multiple flanges is 4, which are, from top to bottom, the first flange, the second flange, the third flange and the fourth flange.

[0013] Furthermore, the inner rings of the first flange, the second flange, the third flange and the fourth flange are all processed with connecting teeth.

[0014] Furthermore, a connecting groove is provided on the outer circumferential side wall of the rubber coating layer, and the connecting teeth are clamped in the connecting groove.

[0015] Furthermore, the connecting assembly includes a hollow sleeve, a hammer-shaped intermittent rod, a solid rod and a high-rigidity spring. The hollow sleeve is installed on the lower end of the first flange, the upper part of the hammer-shaped intermittent rod is clamped in the hollow sleeve, the lower part of the hammer-shaped intermittent rod passes through the second flange and is connected to the upper end face of the third flange, the second flange and the third flange are connected by a solid rod, the upper end of the high-rigidity spring is connected to the lower end face of the second flange, and the lower end of the high-rigidity spring passes through the third flange and is connected to the fourth flange.

[0016] Furthermore, a gap is left between the upper portion of the hammer-shaped interrupted rod and the hollow sleeve in the vertical direction.

[0017] Preferably, the rubber coating is made of natural rubber.

[0018] Compared with the prior art, the present invention has the following effects:

[0019] 1. The support structure pipeline of the present invention comprises an inner skeleton composed of a multi-layer chiral structure (i.e., a periodic structure 2), a soft filler coating (i.e., a coating layer 1), the entire support structure pipeline is divided into three sections of artificial periodic structure layers 2-4 along the axial direction, and the support structure pipeline is connected to each other along the axial direction to form a discontinuous rod, a solid rod, and a high-rigidity spring of a series-parallel structure. All structures cooperate with each other to form a periodic support structure pipeline to obtain Bragg scattering band gap characteristics. After calculation, this support structure pipeline has a low-frequency band gap characteristic and has excellent vibration reduction and noise reduction performance.

[0020] 2. The present invention is mainly used in the field of seawater pipeline systems such as ships and submarines, and uses its periodic unit structure to achieve low-frequency bandgap characteristics. In addition, this support structure pipeline also has high stiffness characteristics, and the spring structure in the connection also makes the axial stiffness of the structure a controllable physical property, so that the support structure pipeline meets various working conditions.

[0021] 3. In order to reduce axial vibration, the present invention designs a device including six layers of periodic chiral structures, each layer consisting of eight chiral structure units, so as to achieve efficient axial vibration reduction effect. In order to achieve noise reduction, the present invention fills the inner and outer sides of the pipeline skeleton and the gap between the skeletons with a soft filler coating as a sound insulation layer, which effectively reduces sound propagation and achieves a significant noise reduction effect.

[0022] 4. The pipeline of the present invention makes full use of the band gap characteristics of the periodic structure to achieve the purpose of vibration reduction and noise reduction at a lower frequency. The main structure is made of high-strength 304 steel material to ensure that the pipeline can still maintain excellent mechanical properties when it is subjected to high-pressure and high-flow medium transportation. At the same time, the external flange connection of the pipeline innovatively adopts a spring design. This design not only enhances the flexibility and adaptability of the pipeline, but also allows the user to change the stiffness of the overall structure by adjusting the spring stiffness, thereby achieving precise control of the vibration and noise characteristics of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the main view of the chiral structure unit cell of the present invention. The parameters used in the calculation are: r1=4mm, r2=5mm, a=38mm, b=40mm, c=15.5mm, d=2mm, x1=8.

[0024] Figure 2 It is a schematic diagram of the structure when the chiral structure unit cell is connected to the hollow cylinder 2-2. The parameters used in the calculation are: r1=4mm, r2=5mm, a=38mm, b=40mm, c=15.5mm, d=2mm, x1=8; e=6mm, f=18mm, g=2mm, h=31mm, r3=53mm, r4=71mm;

[0025] Figure 3 This is a stereogram when the chiral structure skeleton is a three-segment periodicity. The parameters used in the calculation are: r1 = 4mm, r2 = 5mm, a = 38mm, b = 40mm, c = 15.5mm, d = 2mm; e = 6mm, f = 18mm, g = 2mm, h = 31mm, r3 = 53mm, r4 = 71mm; i = 40mm;

[0026] Figure 4 It is a schematic diagram of the structure of multiple flanges.

[0027] Figure 5 1 is a schematic diagram of the overall structure of the rubber coating layer 1, in which the inner rings of the second flange 4 and the third flange 5 are both processed with connecting teeth.

[0028] Figure 6 yes Figure 5 This is a longitudinal section view before the connecting teeth are opened.

[0029] Figure 7 It is a three-dimensional cross-sectional view of the hollow sleeve 7 and the hammer-shaped intermittent rod 8 after assembly. The parameters used in the calculation are: o=148mm, p=20mm, q=40mm, r=10mm, s=24mm, r12=10mm, r13=23mm, r14=30mm, r15=12mm, r16=25mm, r17=125mm.

[0030] Figure 8 It is a front view of the solid rod 9 installed between the second flange 4 and the third flange 5. The parameters used in the calculation are: t=68mm, r18=10mm, r19=125mm, θ3=45°.

[0031] Fig. 9 It is a schematic diagram of one quarter of the overall structure of the present invention, excluding the high-rigidity spring 10.

[0032] Fig.10 It is a schematic diagram of the overall structure of the present invention.

[0033] Fig.11 It is an exploded view of the overall structure of the present invention.

[0034] Fig.12 This is a schematic diagram of the vibration isolation results of the pipeline body with a low-rigidity spring support structure. Fig.12 The transmission loss results at frequencies of 0-1000Hz show that the transmission of sound energy from one end of the pipe to the other end is attenuated to varying degrees, which proves that this structure has good vibration and noise reduction performance in the low frequency band (0-1000Hz) and can produce a band gap.

[0035] Fig.13 is the displacement frequency response diagram of the input and output ends. Among them, Fig.13 It means that under low frequency conditions of 0-1000Hz, the output displacement response of the input displacement excitation is significantly attenuated after passing through this structure. DETAILED DESCRIPTION

[0036] Specific implementation method 1: Combination Figures 1 to 11 The present embodiment is described, and the present embodiment includes a supporting structure pipeline A, a plurality of flanges and a connecting assembly; the supporting structure pipeline A includes a rubber coating layer 1 and a plurality of periodic structures 2, the plurality of periodic structures 2 are sequentially connected in series from top to bottom, the rubber coating layer 1 is coated on the plurality of periodic structures 2 to form a columnar artificial periodic structure with a band gap characteristic, wherein the periodic structure 2 is a chiral structure skeleton; the plurality of flanges are installed on the outer circumferential side wall of the supporting structure pipeline A from top to bottom, and the plurality of flanges are connected by connecting assemblies.

[0037] This embodiment can achieve a specific band gap characteristic by adopting axial and circumferential artificial periodic structures, which can effectively suppress the vibration generated by the pipeline during the medium transportation process and significantly reduce the noise level. This design strategy provides an efficient vibration reduction and noise reduction solution for the pipeline system.

[0038] The supporting structure pipeline is a periodic structure, the soft sound insulation layer is the rubber coating layer 1, the rubber coating layer 1 is wrapped around the chiral structure skeleton of the periodic structure 2, forming a supporting structure pipeline with a certain thickness, which is an alternating combination of flanges and chiral structure skeletons from top to bottom. The supporting structure pipeline A includes x layers of chiral structures arranged along the axial direction of the supporting structure pipeline, and this arrangement has the band gap characteristics of the periodic structure. The x layers of chiral structures have x periods, x≥6, so as to achieve a significant vibration reduction effect of the artificial periodic structure.

[0039] The inner diameter of the support structure pipeline A of this embodiment is r, and the outer diameter is R, r≥50mm, wherein 20mm≤Rr≤25mm.

[0040] In this embodiment, the structural thickness of the rubber coating layer 1 of the supporting structure pipeline A is n=23 mm, the inner diameter of the rubber coating layer 1 is r10=50 mm, and the outer diameter is r11=73 mm.

[0041] The present invention utilizes the Bragg band gap characteristics of the artificial metamaterial structure to reduce the vibration propagation performance within a certain frequency range to a limited extent, thereby achieving the purpose of vibration isolation and noise reduction. According to the dimensions of each component in the above-mentioned embodiment, simulation calculations were performed using ANSYS software, and the results showed that the present invention has an excellent vibration isolation effect near 600Hz-800Hz and has multiple band gaps within 0Hz-600Hz.

[0042] Compared with conventional pipelines, the spring-type support structure pipeline of the embodiment of the present invention has the outstanding feature of adopting a periodic structure design, having low stiffness and being able to adjust the stiffness according to the spring, and being able to suppress the axial vibration transmission characteristics. The pipeline structure can be used in practical engineering projects of low-frequency vibration reduction and isolation.

[0043] Specific implementation method 2: Combination Figure 3 To illustrate this embodiment, the chiral structural skeleton of this embodiment includes an upper thin plate 2-1, a hollow cylinder 2-2, a lower thin plate 2-3 and two artificial periodic structure layers 2-4. The upper thin plate 2-1, the hollow cylinder 2-2 and the lower thin plate 2-3 are arranged coaxially from top to bottom, and the hollow cylinder 2-2 is connected to the upper thin plate 2-1 and the lower thin plate 2-3 respectively through an artificial periodic structure layer 2-4.

[0044] In this arrangement, the chiral structure skeleton is composed of a hollow cylinder and two centrally symmetrical thin plates, and a single period of the chiral structure unit cell is composed of eight chiral structures arranged at uniform intervals; two layers of chiral structures and three layers of chiral structure support plates (referring to the upper thin plate 2-1, the hollow cylinder 2-2 and the lower thin plate 2-3) are staggered and overlapped to form a period, and the supporting structure pipeline contains a total of three sections of chiral structure periods; three sections of chiral structure periods in the axial direction are staggered and overlapped with four sections of flange structures to form the main structure of the supporting structure pipeline; other components and connection relationships are the same as those in the specific implementation method one.

[0045] Specific implementation method three: Combination Figures 1 to 3 To illustrate this embodiment, the artificial periodic structure layer 2-4 of this embodiment includes a plurality of chiral structure cells, which are arranged in a ring array, wherein one end of the plurality of chiral structure cells is connected to the hollow cylinder 2-2, and the other end of the plurality of chiral structure cells is connected to the upper thin plate 2-1 or the lower thin plate 2-3. Such an arrangement facilitates the formation of a chiral structure cell with axial torsion force. Other components and connection relationships are the same as those of the first or second specific embodiments.

[0046] Specific implementation method four: Combination Figure 1 To illustrate this embodiment, the chiral structure unit cell of this embodiment includes a cylinder 2-5 and two oblique arms 2-6, and the two oblique arms 2-6 are installed on the outer circumferential side wall of the cylinder 2-5 in an axisymmetric manner.

[0047] In this way, the chiral structure unit cell of the supporting structure pipeline is composed of a small cylinder and two oblique arms. The supporting structure pipeline is a three-dimensional periodic structure, which is divided into two categories. From the annular direction, each layer contains a total of 8 chiral structure units. From the axial direction, each layer of chiral structure is sandwiched by annular plates (referring to the upper thin plate 2-1, the hollow cylinder 2-2 and the lower thin plate 2-3). The overall structure is a periodic structure formed by alternating the chiral structure and the annular support plate. The other components and connection relationships are the same as any one of the specific implementation methods one to three.

[0048] The wall thickness of the cylinder 2-5 in this embodiment is d=2mm, the inner diameter of the ring is r1=4mm, the outer diameter is r2=5mm, and the number of chiral structure cells contained in a single layer period is x1=8. Taking the center of the cylinder 2-5 as the origin, the coordinates of the vertices of the chiral part of the chiral structure cell are (40, 15.5); (38, 15.5); (-40, -15.5); (38, -15.5), the height of the chiral structure cell is h=31mm, and the width of the chiral structure is e=6mm. The thickness of the chiral structure support plate (referring to the hollow cylinder 2-2) is d=2mm, the inner diameter of the chiral structure support plate is r3=53mm, and the outer diameter is r4=71mm. Each period contains three layers of chiral structure support plates and two layers of chiral structures. It contains three layers of chiral structure, upper, middle and lower, and the distance between each layer is i=40mm.

[0049] The thickness of the chiral structure cylinder 2-5 and the oblique arm 2-6 in this embodiment is a, a≥1.5mm, to ensure the strength of the structural skeleton, the angle between the oblique arm 2-6 and the hollow cylinder 2-2 is θ, 10°≤θ≤50°, the inclined chiral structure skeleton has the function of converting the axial force into torsion force, and plays a vibration reduction role. n chiral structure units are evenly arranged along the circumferential direction, where n≥8, which have the functions of connection, vibration reduction and support.

[0050] Specific implementation method five: Combination Figure 4 To explain this embodiment, the number of the plurality of flanges in this embodiment is four, which are, from top to bottom, a first flange 3 , a second flange 4 , a third flange 5 and a fourth flange 6 .

[0051] In this way, the present invention has four layers of flanges, which are recorded as the first flange, the second flange, the third flange and the fourth flange from top to bottom, wherein the second flange and the third flange are directly connected by a solid rod, the first flange and the third flange are connected by an intermittent rod composed of a hammer rod and a sleeve, and the second flange and the fourth flange are connected by a high-rigidity spring. Other components and connection relationships are the same as any one of the specific embodiments one to four.

[0052] In this embodiment, the structural height of the pipeline flange is j=40 mm.

[0053] Specific implementation method six: Combination Figure 4 To explain this embodiment, the inner rings of the first flange 3 , the second flange 4 , the third flange 5 , and the fourth flange 6 of this embodiment are all processed with connecting teeth.

[0054] In this way, in order to solve the connection problem of the structure, the present invention welds the flange to the supporting structure pipeline A. In order to ensure the tight connection between the rubber coating and the flange structure, a groove is designed for the flange so that the rubber coating layer and the flange are physically engaged, thereby achieving a better sealing effect. The other components and connection relationships are the same as any one of the specific implementation methods one to five.

[0055] Among them, the inner ring of the middle two-layer flange structure is processed into a tooth shape (that is, the connecting teeth in the groove design), the tooth profile height is k = 8mm, the width is l = 5mm, so the flange inner diameter is r5 = 55mm, r6 = 60mm, and the outer diameter is r7 = 160mm. In order to connect with the flanges on both sides, the middle two-layer flange adopts a hole digging form, and the hole penetrates the flange, so the hole depth is m = 40mm, the hole inner diameter is r8 = 10mm, the hole center to the pipeline axis center distance r9 = 125mm, the deflection angle is θ1 = 22.5°, θ2 = 67.5°, and the difference between all holes is 45°.

[0056] Specific implementation method seven: Combination Figure 4 To explain this embodiment, a connection groove is provided on the outer circumferential side wall of the rubber coating layer 1 of this embodiment, and the connection teeth are clamped in the connection groove. Such a configuration facilitates the cooperation with the connection teeth to ensure the sealing effect. The other components and connection relationships are the same as any one of the specific embodiments 1 to 6.

[0057] Specific implementation method eight: Combination Fig.11 To illustrate this embodiment, the connecting assembly of this embodiment includes a hollow sleeve 7, a hammer-shaped intermittent rod 8, a solid rod 9 and a high-rigidity spring 10. The hollow sleeve 7 is installed on the lower end of the first flange 3, the upper part of the hammer-shaped intermittent rod 8 is clamped in the hollow sleeve 7, the lower part of the hammer-shaped intermittent rod 8 passes through the second flange 4 and is connected to the upper end face of the third flange 5, the second flange 4 and the third flange 5 are connected by the solid rod 9, the upper end of the high-rigidity spring 10 is connected to the lower end face of the second flange 4, and the lower end of the high-rigidity spring 10 passes through the third flange 5 and is connected to the fourth flange 6.

[0058] In this way, the two middle flanges are connected by tie rods, and circular holes are opened at equal intervals to facilitate the extension of tie rods from the flanges on both sides to connect with the flange on the other side; the first flange is connected to the third flange by an intermittent rod; the second flange is connected to the fourth flange by a high-rigidity spring, and the intermittent rod is composed of a hollow sleeve and a hammer-shaped intermittent rod; the gaps in the chiral structure and the gaps in the flange structure are filled with a rubber-encapsulated structure.

[0059] The chiral structure unit cell and the chiral structure support plate are welded, the chiral structure support plate and the flange are welded, the flange structure and the pull rod are welded, the flange structure and the high-rigidity spring are welded, and friction contact is used between all structures and the filling rubber layer.

[0060] The inner diameter of the flange structure differs from the inner diameter of the chiral structure support plate structure by a fixed length. This pipeline design has lower axial stiffness than ordinary pipelines. The chiral structure transforms the force form of the structure, converts part of the axial force into torsional force, and reduces the axial stiffness of the pipeline structure. At the same time, the chiral oscillator (referring to the artificial periodic structure layer 2-4) acts as a microstructure local oscillator, so that the entire pipeline structure has local oscillator characteristics. In addition, since spring contact is adopted between the axial flanges of the structure, the structural stiffness can be more effectively adjusted by changing the stiffness of the spring. Other components and connection relationships are the same as any one of the specific implementation methods one to seven.

[0061] The structures of the hollow sleeve 7 and the hammer-shaped discontinuous rod 8 in this embodiment are as follows: the length of the hammer-shaped rod is o=148mm, the length of the hammer-shaped boss is p=20mm, the height of the hollow sleeve is q=40mm, the length of the hollow sleeve recess is r=10mm, the inner length of the hollow sleeve is s=24mm, the radius of the hammer-shaped rod is r12=10mm, the radius of the hammer-shaped boss is r13=23mm, the outer diameter of the hollow sleeve is r14=30mm, and the diameter of the hollow sleeve recess is r15=12mm The internal diameter of the hollow sleeve is r16 = 25mm, the distance between the axis of the hollow sleeve and the hammer-shaped intermittent rod 8 and the axis of the pipeline is r17 = 125mm, the deflection angle θ1 = 22.5°, θ2 = 67.5°; the solid rod structure between the second flange and the third flange has a height of t = 68mm, the radius of the rod is r18 = 10mm, the distance between the axis of the rod and the axis of the pipeline is r19 = 125mm, and the deflection angle is θ3 = 45°.

[0062] To sum up, the embodiment of the present invention has lower axial stiffness than ordinary corrugated pipes due to the presence of intermittent rods and springs, and the specific structural stiffness can be continuously adjusted according to the spring stiffness, and the self-balancing structure of the structure can be controlled within 3mm, having both good self-balancing and stiffness results.

[0063] Specific implementation method nine: Combination Figure 7This embodiment is described. A gap is left in the vertical direction between the upper part of the hammer-shaped discontinuous rod 8 and the hollow sleeve 7. With such a configuration, a low-rigidity spring-type support structure pipeline for axial vibration isolation is designed in the embodiment of the present invention. The first flange and the third flange, the second flange and the fourth flange of the four-layer flange of the pipeline structure are connected to the spring by discontinuous rods, respectively. The second flange and the third flange are connected by solid rods. In the process of measuring the axial stiffness, the first flange is first subjected to tension, and the tension is transmitted to the third flange through the discontinuous rod. Since the third flange and the second flange are connected by solid rods, the second flange will eventually be subjected to the transmitted tension and transmitted to the fourth flange through the high-rigidity spring. Due to the chiral structure in the pipeline structure, the The axial stiffness of the low pipeline structure is very small, so the stiffness of the structure itself is very small without the tie rod. Therefore, after adding the tie rod, the overall structural pipeline stiffness under 10MPa can still be maintained below 2000N / mm. During the stretching process, the second flange and the third flange structure will produce an axial displacement of about 0.5mm under the internal pressure of 10MPa under the action of the chiral structure, and the first flange and the third flange are connected by an intermittent rod with a gap of 2mm, which will eventually cause the first flange to produce an axial deformation of about 2.5mm and the overall structure will have a self-balancing result within 3mm. The other components and connection relationships are the same as any one of the specific implementation methods one to eight.

[0064] Specific implementation method ten: Combination Figure 5 and Figure 6 This embodiment is described. The rubber coating 1 of this embodiment is made of natural rubber. With this arrangement, the axial movement of the main body of the supporting structure pipeline is restricted. The first flange is connected to the hollow sleeve, and the third flange is connected to the hammer rod. There is a gap between the hammer rod and the sleeve, and the axial movement of the supporting structure pipeline is restricted by the size of the gap. The other components and connection relationships are the same as any one of the specific embodiments 1 to 9.

[0065] The sound insulation layer uses natural rubber as the main material, and its internal filling design is intended to achieve excellent sound insulation effect and provide support and sealing to a certain extent. According to the dimensions of each component in the above embodiment, ANSYS software is used for simulation calculation. The density of the rubber-coated structure is 1150kg / m3, and the other components are 304 steel with a density of 7930kg / m3.

[0066] The entire supporting structure pipeline is made of 304 steel except for natural rubber as a soft sound insulation layer. The joints of the flange, chiral structure skeleton and solid tie rod are welded to ensure the stability of the entire supporting structure pipeline.

[0067] Combination Figures 1 to 13The working principle of the present invention is described:

[0068] When pipes are transmitting fluids, such as working fluids in hydraulic systems, they are subject to forces such as pressure and vibration. Too high a stiffness may cause stress concentration or local deformation in the pipes when they are subjected to stress, thereby increasing the risk of pipe rupture or leakage. In contrast, pipes with low stiffness can better adapt to the effects of these forces, reduce stress concentration and local deformation, and improve the safety and reliability of the pipes. In addition, when pipes with low stiffness are subjected to external shocks or vibrations, they can better absorb and disperse these shocks and vibrations, protect equipment, and extend the service life of the pipes. At the same time, low stiffness also gives the pipes better flexibility and deformability, making them more flexible and convenient in design and installation, and able to adapt to different installation environments and space constraints.

[0069] Based on the above background, the present invention designs a low-rigidity spring-type support structure pipeline for axial vibration isolation. The pipeline adopts a periodic arrangement of chiral structures to form the main skeleton, and has the characteristics of low stiffness in the axial direction. Through reasonable structural design such as springs, intermittent rods, and chiral structure skeletons, the pipeline effectively absorbs and suppresses the vibration of the pipeline system when conveying the medium, reducing the generation and propagation of noise.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. .

Claims

1. A low-rigidity spring-type support structure pipeline for axial vibration isolation, characterized in that: It includes a supporting structure piping (A), a plurality of flanges and connection components; The supporting structure pipeline (A) comprises a rubber coating layer (1) and a plurality of periodic structures (2), wherein the plurality of periodic structures (2) are sequentially connected in series from top to bottom, and the rubber coating layer (1) is coated on the plurality of periodic structures (2) to form a columnar artificial periodic structure with band gap characteristics, wherein the periodic structure (2) is a chiral structure skeleton; A plurality of flanges are installed on the outer circumferential side wall of the supporting structure pipeline (A) from top to bottom, and the plurality of flanges are connected by connecting components.

2. A low-rigidity spring-type support structure pipeline for axial vibration isolation according to claim 1, characterized in that: The chiral structural skeleton comprises an upper thin plate (2-1), a hollow cylinder (2-2), a lower thin plate (2-3) and two artificial periodic structure layers (2-4); the upper thin plate (2-1), the hollow cylinder (2-2) and the lower thin plate (2-3) are coaxially arranged from top to bottom; the hollow cylinder (2-2) is connected to the upper thin plate (2-1) and the lower thin plate (2-3) respectively through an artificial periodic structure layer (2-4).

3. A low-rigidity spring-type support structure pipeline for axial vibration isolation according to claim 2, characterized in that: The artificial periodic structure layer (2-4) includes a plurality of chiral structure unit cells, which are arranged in a ring array, wherein one end of the plurality of chiral structure unit cells is connected to the hollow cylinder (2-2), and the other end of the plurality of chiral structure unit cells is connected to the upper thin plate (2-1) or the lower thin plate (2-3).

4. A low-rigidity spring-type support structure pipeline for axial vibration isolation according to claim 3, characterized in that: The chiral structure unit cell comprises a cylinder (2-5) and two oblique arms (2-6), and the two oblique arms (2-6) are axially symmetrically mounted on the outer circumferential side wall of the cylinder (2-5).

5. A low-rigidity spring-type support structure pipeline for axial vibration isolation according to claim 1 or 4, characterized in that: The number of the multiple flanges is 4, which are, from top to bottom, a first flange (3), a second flange (4), a third flange (5) and a fourth flange (6).

6. A low-rigidity spring-type support structure pipeline for axial vibration isolation according to claim 5, characterized in that: The inner rings of the first flange (3), the second flange (4), the third flange (5) and the fourth flange (6) are all processed with connecting teeth.

7. A low-rigidity spring-type support structure pipeline for axial vibration isolation according to claim 6, characterized in that: A connecting groove is provided on the outer circumferential side wall of the rubber coating layer (1), and the connecting teeth are clamped in the connecting groove.

8. A low-rigidity spring-type support structure pipeline for axial vibration isolation according to claim 7, characterized in that: The connecting assembly comprises a hollow sleeve (7), a hammer-shaped interrupted rod (8), a solid rod (9) and a high-rigidity spring (10). The hollow sleeve (7) is installed on the lower end of the first flange (3), the upper part of the hammer-shaped interrupted rod (8) is clamped in the hollow sleeve (7), the lower part of the hammer-shaped interrupted rod (8) passes through the second flange (4) and is connected to the upper end surface of the third flange (5), the second flange (4) and the third flange (5) are connected by a solid rod (9), the upper end of the high-rigidity spring (10) is connected to the lower end surface of the second flange (4), and the lower end of the high-rigidity spring (10) passes through the third flange (5) and is connected to the fourth flange (6).

9. A low-rigidity spring-type support structure pipeline for axial vibration isolation according to claim 8, characterized in that: A gap is left between the upper part of the hammer-shaped interrupted rod (8) and the hollow sleeve 7 in the vertical direction.

10. A low-rigidity spring-type support structure pipeline for axial vibration isolation according to claim 9, characterized in that: The rubber coating (1) is made of natural rubber material.

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