A vibration reduction system for horizontal pipes inside a heat absorption tower

Abstract

This invention provides a vibration reduction system for horizontal pipes within a solar thermal power generation tower, belonging to the field of solar thermal power generation technology. The invention includes a vibration damper body, comprising at least two spaced-apart damping rings and a curved connecting rod assembly connecting adjacent damping rings. Each damping ring includes an inner ring, an outer ring spaced apart from the inner ring, and a connecting member sandwiched between the inner and outer rings. Both the inner and outer rings are closed circular structures. The inner ring is fitted around the perimeter of the horizontal pipe, and the outer ring is located outside the inner ring. The curved connecting rod assembly includes two pre-assembled curved connecting rod units. Each curved connecting rod unit includes a curved rod and connecting rods at both ends of the curved rod. The two connecting rods are fixed one-to-one with the outer rings of the two damping rings, and the curved rods are suspended between the two damping rings. This invention can maintain the stability of horizontal pipes under sudden impact loads and continuous low-frequency vibrations.

Description

Technical Field

[0001] This invention belongs to the field of solar thermal power generation technology, specifically relating to a vibration reduction system for horizontal pipes inside a heat absorption tower. Background Technology

[0002] As the core component of a solar thermal power plant, the pipe vibration within the receiver tower has unique causes and aggravating factors, making it more challenging than conventional industrial pipes. Solving the pipe dynamics problems centered on fluid-induced vibration and thermal stress vibration is crucial in a unique environment combining extreme high temperatures, intense alternating thermal stress, complex multiphase flow, and external wind loads. Traditional vibration reduction technologies, limited by high-temperature environments, weight constraints, and insufficient adaptability to multi-physics coupled vibrations, often have limited effectiveness or short lifespans. Poorly designed pipe systems can lead to a series of serious problems. For example, under continuous vibration, even minor vibrations can generate microcracks at stress concentration points, which can propagate and eventually cause pipe rupture, resulting in media leakage and catastrophic accidents such as production shutdowns, fires, explosions, and environmental pollution.

[0003] Currently available pipeline vibration reduction technologies include: (1) Install dampers: allow the pipe to expand and contract slowly due to thermal changes, but provide a huge damping force to suppress rapid movement caused by vibration or impact.

[0004] (2) Mechanical vibration damper: It uses friction damping or the damping of viscoelastic materials to consume vibration energy.

[0005] (3) Rubber expansion joints / flexible pipes: can effectively isolate high-frequency vibration and noise, and compensate for a small amount of displacement. However, their temperature and pressure resistance are limited.

[0006] (4) Metal hose: It has good flexibility, can absorb displacement and vibration in multiple directions, and has better high temperature and high pressure resistance than rubber joints.

[0007] Existing technologies may not be able to simultaneously provide both shock resistance and the ability to withstand continuous minor vibrations, or they may be too expensive or difficult to maintain.

[0008] Therefore, it is necessary to provide a vibration reduction system for horizontal pipes inside a heat absorption tower to solve the above problems. Summary of the Invention

[0009] This invention provides a vibration reduction system for horizontal pipes inside a heat absorption tower, improving upon existing vibration reduction and impact resistance methods for horizontal pipes. This effectively increases the lifespan of vibration reduction protection devices for pipes within the heat absorption tower and significantly enhances pipe stability. It enables the pipes inside the heat absorption tower to remain stable even under sudden impact loads and continuous low-frequency vibrations.

[0010] To solve the above-mentioned technical problems, the present invention is implemented as follows: A vibration damping system for a horizontal pipe inside a heat absorption tower includes a vibration damper body. The vibration damper body includes at least two spaced-apart damping rings and a curved connecting rod assembly connecting adjacent damping rings. Each damping ring includes an inner ring, an outer ring spaced apart from the inner ring, and a connecting member sandwiched between the inner and outer rings for connecting the inner and outer rings. Both the inner and outer rings are closed circular structures. The inner ring is fitted around the periphery of the horizontal pipe, and the outer ring is located outside the inner ring. The curved connecting rod assembly includes two sets of curved connecting rod units. Each curved connecting rod unit includes a curved rod and connecting rods at both ends of the curved rod. The two connecting rods are fixed to the outer rings of the two damping rings one-to-one, and the curved rods are suspended between the two damping rings.

[0011] As a preferred improvement, the axis of the inner ring is on the same straight line as the axis of the outer ring, and the axis of the connecting member is parallel and spaced apart from the axes of the inner / outer ring.

[0012] As a preferred improvement, the inner ring, outer ring, and connecting components are integrally molded from a fire-resistant and flexible metamaterial.

[0013] As a preferred improvement, the number of connecting members is multiple, and the multiple connecting members are distributed in a ring array along the axis of the inner ring / outer ring to uniformly support the outer ring in the circumferential direction.

[0014] As a preferred improvement, the number of the curved connecting rod groups is multiple, and the multiple curved connecting rod groups are distributed in a ring array along the axis of the inner ring / outer ring.

[0015] As a preferred improvement, the curved connecting rod assembly is connected to the end face of the outer ring. The outer ring is provided with a through mounting hole, the axis of which is parallel to the axis of the outer ring. The middle position of the connecting rod is inserted into the mounting hole, and both ends are exposed outside the mounting hole and fastened with bolts. The bolts at both ends of the connecting rod clamp the outer ring, so that the connecting rod and the outer ring are fixed.

[0016] As a preferred improvement, the curved rod is a helical rod structure, and the two curved rods in each curved connecting rod group have opposite helical directions to form a double bolt structure. The two curved rods are kept apart, and the axes of the two curved rods are parallel.

[0017] As a preferred improvement, it also includes an energy-dissipating component connected to the outer ring and arranged along the radial direction of the outer ring, for bearing radial impact loads and dissipating the energy of the impact loads.

[0018] As a preferred improvement, the energy-consuming component includes a housing, a lead screw, an inertial capacitance, a sleeve, a central rod, and a damper. The housing includes a shell and a first end cap and a second end cap disposed at both ends of the shell. The lead screw's first end is rotatably supported on the first end cap, and its end is freely suspended. The inertial capacitance is fitted onto the lead screw. The sleeve includes a main body and an extension. The sleeve engages with the external thread of the suspended end of the lead screw through the internal thread of its main body. The extension of the sleeve is a groove-shaped structure with one open end. The end of the lead screw extends into the groove-shaped structure. A gap is left between the bottom of the groove and the end of the lead screw, allowing the sleeve to move relative to the lead screw within a certain stroke. One end of the central rod is connected to the sleeve, and the other end is connected to the piston rod of the damper fixed on the second end cap.

[0019] As a preferred improvement, one end of the energy-consuming component is connected to the external tower body or stable support via a hinge seat, and the other end is hinged to the outer ring of the vibration damping ring via a hinge seat on the outer ring, with the installation direction along the radial direction of the outer ring.

[0020] The beneficial effects of this invention are as follows: (1) This invention has a multi-stage vibration reduction effect. When low-frequency vibration occurs inside the heat absorption tower, the annular design between the inner and outer rings of the vibration reduction ring can effectively counteract the vibration effect and improve the stability of the pipeline under continuous low-frequency vibration. When subjected to impact load, the energy dissipation component bears most of the impact and consumes the impact energy. The remaining weak energy is borne by the annular design between the inner and outer rings of the vibration reduction ring. With the cooperation of the two, the stability of the pipeline under impact load can be greatly improved. (2) This invention is simple and efficient, requiring only two energy-consuming components, two vibration damping rings, and several curved connections to withstand continuous low-frequency vibrations and impact loads. Installation and maintenance are simple and inexpensive. (3) This invention has high reliability and long lifespan. The energy-consuming components do not contain complex electronic components and mainly rely on mechanical structures and sealing systems. As long as the seal is good and the internal oil does not leak, it can work stably for a long time. Moreover, the materials used in its manufacture are all heat-resistant and cold-resistant, which can adapt to the extreme environment inside the heat absorption tower. Therefore, the maintenance requirements are low and the service life is long. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a three-dimensional structural diagram of a horizontal pipe vibration reduction system inside a heat absorption tower provided by the present invention; Figure 2 express Figure 1 The front view of the horizontal pipe vibration reduction system inside the heat absorption tower shown. Figure 3 express Figure 1 The side view of the horizontal pipe vibration reduction system inside the heat absorption tower is shown. Figure 4 A three-dimensional structural diagram showing the curved connecting rod assembly; Figure 5 An exploded view of the energy-consuming components; Figure 6 This is a cross-sectional view of an energy-consuming component. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figures 1-6 As shown, this embodiment provides a vibration reduction system for horizontal pipes inside a heat absorption tower, including a vibration damper body 10 and an energy dissipation component 20.

[0024] The vibration damper body 10 includes at least two damping rings 11 spaced apart along the axial direction of the pipe and a plurality of curved connecting rod assemblies 12 connecting the two damping rings 11. The damping ring 11 is the core vibration isolation unit of the vibration damping system, including an inner ring 111, an outer ring 112 spaced apart from the inner ring 111, and a connecting member 113 connecting the inner ring 111 and the outer ring 112. The horizontal pipe to be protected passes through the inner ring 111 of the damping ring 11.

[0025] In this embodiment, the number of damping rings 11 is specifically selected as two. In other embodiments, the number of damping rings 11 can be selected according to actual needs.

[0026] Both the inner ring 111 and the outer ring 112 are closed circular structures, and their axes are on the same straight line. The inner ring 111 is fitted around the outside of the horizontal pipe, and the outer ring 112 is located outside the inner ring 111.

[0027] The connecting member 113 is also a closed circular structure, sandwiched between the inner ring 111 and the outer ring 112. Structurally, the axis of the connecting member 113 is parallel and spaced apart from the axis of the inner ring 111 / outer ring 112. There are multiple connecting members 113, which are arranged in a circular array along the axis of the inner ring 111 / outer ring 112 to uniformly support the outer ring 112 in the circumferential direction.

[0028] The inner ring 111, outer ring 112, and connecting member 113 are made of fire-resistant, corrosion-resistant, and flexible metamaterials manufactured using a one-piece molding process to ensure structural integrity and maintain elasticity at high temperatures. The inner diameter of the inner ring 111 is adapted to the outer diameter of the pipe, allowing it to be directly fitted or installed on the pipe via an adapter. The annular structure of the connecting member 113 provides flexible support and cushioning in the radial, axial, and circumferential directions, effectively filtering initial vibrations from the pipe and withstanding continuous low-frequency vibrations.

[0029] The curved connecting rod assembly 12 serves as a connection and secondary vibration damping unit, acting as a connection between the two vibration damping rings 11. It can reduce the vibration between the two vibration rings 11 and keep the two vibration damping rings 11 stable.

[0030] The number of curved connecting rod assemblies 12 is multiple, and the multiple curved connecting rod assemblies 12 are distributed in a circular array along the axis of the inner ring 111 / outer ring 112. The curved connecting rod assemblies 12 are connected to the end face of the outer ring 112. In this embodiment, the number of curved connecting rod assemblies 12 is specifically selected as six sets to cover the entire circumference of the vibration damping ring 11 as evenly as possible.

[0031] The curved connecting rod assembly 12 includes two curved connecting rod units 120 configured as a set. Each curved connecting rod unit 120 includes a curved rod 121 and connecting rods 122 disposed at both ends of the curved rod 121. The two connecting rods 122 are fixed to the outer rings 112 of the two damping rings 11 in a one-to-one correspondence. The curved rod 121 is suspended between the two damping rings 11.

[0032] The curved rod 121 is a helical rod structure. Within each curved connecting rod assembly 12, the two curved rods 121 have opposite helical directions, one left-handed and the other right-handed, forming a stable double-bolt structure similar to DNA. It should be noted that the two curved rods 121 must be spaced apart, and their axes must remain parallel. The curved rod 121 can be stretched or compressed to a certain extent, suppressing changes in the distance between the two damping rings 10 through recoverable deformation, thereby reducing vibration.

[0033] The connecting rod 122 is fixed to the outer ring 112 as follows: the outer ring 112 has a through mounting hole, the axis of which is parallel to the axis of the outer ring 112. The middle position of the connecting rod 122 is inserted into the mounting hole, and both ends protrude outside the mounting hole. A secure connection with the vibration damping ring 11 is achieved by tightening it with nuts or other fasteners on both sides of the mounting hole. This connection method facilitates installation and preload adjustment. The suspended helical curved rod 121 has excellent elasticity, capable of absorbing and dissipating the energy of the axial, lateral, and torsional relative displacement between the two vibration damping rings 11 caused by pipeline vibration.

[0034] The energy-consuming component 20 is connected to the outer ring 112. Specifically, the energy-consuming component 20 is connected to the outer surface of the outer ring 112, and the axis of the energy-consuming component 20 is along the radial direction of the outer ring 112.

[0035] Specifically, a hinge seat 1121 is provided on the outer surface of the outer ring 112. One end of the energy dissipation component 20 is hinged to an external component, and the other end is hinged to the hinge seat 1121. The energy dissipation component 20 is used to withstand impact loads and dissipate the energy of the impact loads.

[0036] The energy-consuming component 20 includes a housing 21, a lead screw 22, an inertial capacity 23, a sleeve 24, a center rod 25, and a damper 26.

[0037] The outer casing 21 includes a housing 211 and a first end cap 212 and a second end cap 213 disposed at both ends of the housing 211. The first end of the lead screw 22 is rotatably supported on the first end cap 212 by a bearing or other mechanism, and the end is freely suspended. The inertial capacity 23 is fitted onto the lead screw 22 by a thread or keyway.

[0038] The sleeve 24 includes a main body 241 and an extension 242. The sleeve 24 engages with the external thread of the suspension end of the lead screw 22 via the internal thread of its main body 241. The extension 242 of the sleeve 24 is a groove-shaped structure with one open end. The end of the lead screw 22 extends into the groove, and a gap is left between the bottom of the groove and the end of the lead screw, allowing the sleeve 24 to move relative to the lead screw 22 within a certain stroke. One end of the central rod 25 is connected to the sleeve 24, and the other end is connected to the piston rod of the damper 26 (such as a hydraulic damper) fixed on the second end cap 213.

[0039] One end of the energy-consuming component 20 is connected to the external tower body or stable support through a hinge seat, and the other end is hinged to the outer ring of the vibration damping ring 11 through a hinge seat 1121 on the outer ring 112, with the installation direction along the radial direction of the outer ring.

[0040] The working principle of the vibration reduction system is as follows: When a horizontal pipeline experiences sustained low-frequency vibrations (such as fluid pulsation or alternating thermal stress), the vibration is first transmitted to the inner ring 111 of the damping ring 11. Through the flexible deformation of the connecting member 113, most of the vibration energy is absorbed and isolated, significantly reducing the vibration amplitude of the outer ring 112. Simultaneously, the relative motion between the two damping rings 11 is constrained by the curved connecting rod assembly 12, and the helical curved rod 121 undergoes elastic deformation, further dissipating the vibration energy and preventing the vibration from being amplified and transmitted axially through the pipeline.

[0041] When the pipeline is subjected to a sudden radial impact load (such as sudden valve opening and closing, water hammer, or external strong wind disturbance), the impact force is transmitted to the outer ring 112 through the pipeline, inner ring 111, and connecting member 113. The impact force forces the outer ring 112 to drive the hinge end of the energy dissipation component 20 to generate a displacement tendency, which in turn pushes the sleeve 24 to move rapidly along the axis of the lead screw 22. The movement of the sleeve 24 forces the lead screw 22 to rotate at high speed through the threaded pair, driving the inertial capacity 23 to accelerate rotation and converting part of the impact kinetic energy into rotational kinetic energy. On the other hand, the sleeve 24 directly pulls the piston of the damper 26 through the central rod 25, and the damper 26 generates a huge damping force to dissipate energy. The inertial effect of the inertial capacity and the energy dissipation effect of the damper work in parallel and synergistically to effectively suppress the peak load and displacement caused by the impact, protecting the pipeline system. The groove design of the extension 242 of the sleeve 24 ensures that the mechanism will not be jammed within the limit stroke.

[0042] In summary, this invention provides comprehensive, broadband vibration and impact protection for horizontal pipelines within a heat absorption tower through a three-tiered synergistic mechanism: flexible vibration isolation via damping rings, elastic connection via curved rods, and impact energy dissipation via energy-consuming components. The system boasts a robust structure, excellent environmental resistance, and low maintenance requirements, demonstrating significant engineering application value.

[0043] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other modifications under the guidance of the present invention without departing from the spirit of the present invention, and all of these modifications are within the protection scope of the present invention.

Claims

1. A vibration damping system for horizontal pipes inside a heat absorption tower, characterized in that, The device includes a vibration damper body, which comprises at least two spaced-apart damping rings and a curved connecting rod assembly connecting adjacent damping rings. Each damping ring includes an inner ring, an outer ring spaced apart from the inner ring, and a connecting member sandwiched between the inner and outer rings for connecting the inner and outer rings. Both the inner and outer rings are closed circular structures. The inner ring is fitted around the periphery of a horizontal pipe, and the outer ring is located outside the inner ring. The curved connecting rod assembly comprises two sets of curved connecting rod units. Each curved connecting rod unit includes a curved rod and connecting rods at both ends of the curved rod. The two connecting rods are fixed to the outer rings of the two damping rings one-to-one, and the curved rods are suspended between the two damping rings.

2. The vibration reduction system for horizontal pipes inside the heat absorption tower according to claim 1, characterized in that, The axis of the inner ring is on the same straight line as the axis of the outer ring, and the axis of the connecting member is parallel and spaced apart from the axes of the inner / outer ring.

3. The vibration reduction system for horizontal pipes inside the heat absorption tower according to claim 1, characterized in that, The inner ring, outer ring, and connecting components are integrally molded from a fire-resistant and flexible metamaterial.

4. The vibration reduction system for horizontal pipes inside the heat absorption tower according to claim 2, characterized in that, The number of connecting members is multiple, and the multiple connecting members are distributed in a ring array along the axis of the inner ring / outer ring to uniformly support the outer ring in the circumferential direction.

5. The vibration reduction system for horizontal pipes inside the heat absorption tower according to claim 2, characterized in that, The number of curved connecting rod groups is multiple, and the multiple curved connecting rod groups are distributed in a ring array along the axis of the inner ring / outer ring.

6. The vibration reduction system for horizontal pipes inside the heat absorption tower according to claim 1, characterized in that, The curved connecting rod assembly is connected to the end face of the outer ring. The outer ring is provided with a through mounting hole. The axis of the mounting hole is parallel to the axis of the outer ring. The middle position of the connecting rod is inserted into the mounting hole, and both ends are exposed outside the mounting hole and fastened with bolts. The bolts at both ends of the connecting rod clamp the outer ring, so that the connecting rod and the outer ring are fixed.

7. The vibration reduction system for horizontal pipes inside the heat absorption tower according to claim 1, characterized in that, The curved rod is a helical rod structure. The two curved rods in each curved connecting rod group have opposite helical directions, forming a double bolt structure. The two curved rods are spaced apart, and the axes of the two curved rods are parallel.

8. The vibration reduction system for horizontal pipes inside the heat absorption tower according to claim 1, characterized in that, It also includes an energy-dissipating component, which is connected to the outer ring and arranged along the radial direction of the outer ring, for bearing the impact load in the radial direction and dissipating the energy of the impact load.

9. The vibration reduction system for horizontal pipes inside the heat absorption tower according to claim 8, characterized in that, The energy-consuming component includes a housing, a lead screw, an inertial capacitance, a sleeve, a center rod, and a damper. The housing includes a shell and a first end cap and a second end cap disposed at both ends of the shell. The lead screw's first end is rotatably supported on the first end cap, and its end is freely suspended. The inertial capacitance is fitted onto the lead screw. The sleeve includes a main body and an extension. The sleeve engages with the external thread of the suspended end of the lead screw through the internal thread of its main body. The extension of the sleeve is a groove-shaped structure with one open end. The end of the lead screw extends into the groove-shaped structure. A gap is left between the bottom of the groove-shaped structure and the end of the lead screw, allowing the sleeve to move relative to the lead screw within a certain stroke. One end of the center rod is connected to the sleeve, and the other end is connected to the piston rod of the damper fixed on the second end cap.

10. The vibration reduction system for horizontal pipes inside the heat absorption tower according to claim 9, characterized in that, One end of the energy-consuming component is connected to the external tower or stable support via a hinge seat, and the other end is hinged to the outer ring of the vibration damping ring via a hinge seat on the outer ring. The installation direction is radial along the outer ring.

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