Fe-sma memory metal-based water pipeline self-resetting damping support

Abstract

The application discloses a water pipeline self-resetting and damping support based on Fe-SMA memory metal, which comprises an outer support, an inner support mechanism and a thermal activation compensation mechanism, the inner support mechanism is matched and sleeved on a water pipeline, the outer support is sleeved on the periphery of the inner support mechanism and is used for being fixedly installed with an external foundation, the thermal activation compensation mechanism is arranged in an annular space between the inner support mechanism and the outer support, the thermal activation compensation mechanism comprises a connector and a symmetrical functional composite layer, the connector is made of beryllium bronze material, the symmetrical functional composite layer comprises a segmented memory metal ring, the inner and outer ring surfaces of the segmented memory metal ring are sequentially provided with a heating layer and a heat insulation layer from inside to outside, and each functional layer of the symmetrical functional composite layer is fixed together through the connector to form a functional ring, the application has a unique structure and a clever design, and can effectively solve the problem that the existing water pipeline support cannot actively compensate the accumulated permanent displacement caused by foundation settlement or component wear after long-term operation of the support.

Description

Technical Field

[0001] This invention belongs to the field of water pipeline support technology, specifically relating to a self-resetting vibration damping support for water pipelines based on Fe-SMA shape memory metal. Background Technology

[0002] As an important component of water conservancy projects and urban lifeline projects, water transmission pipelines undertake key tasks such as long-distance water resource allocation, urban and rural water supply security, and industrial circulating water transportation. Under actual operating conditions, water transmission pipelines usually need to cross complex geological sections and endure dynamic disturbances caused by water flow pulsation, water hammer impact, and external environment (such as traffic load and geological micro-activity) for a long time. Especially at pipeline joints and bends, stress concentration due to structural discontinuity and the impact force caused by changes in water flow direction make vibration and displacement problems particularly prominent. To ensure the structural safety and operational stability of the pipeline, pipeline supports are usually installed at pipeline joints and bends to bear the weight of the pipeline itself and the weight of the internal water, and to isolate or attenuate the transmission of external vibrations to the pipeline.

[0003] In existing water pipeline projects, the supports used are mainly divided into two categories: rigid supports and elastic self-resetting vibration damping supports. Although the former can provide stable load-bearing capacity, it lacks a buffering mechanism for dynamic load disturbances. The latter isolates high-frequency micro-vibrations by setting passive elastic elements such as rubber pads or springs at the support interface and utilizing the hysteretic energy dissipation characteristics of the material. However, the essence of the above-mentioned existing technical solutions is a passive response mode. Its technical limitation is that it can only deal with instantaneous dynamic disturbances and cannot handle the cumulative permanent displacements generated during long-term operation. For example, elastic elements such as rubber buffer pads undergo permanent compression deformation or wear under long-term compression and shear combined stress. When such permanent displacement occurs, the existing supports can only maintain static support in the new position and cannot actively reset the pipeline to the original design axis. The offset of the pipeline axis not only changes the stress boundary conditions of the pipe section, generating additional bending moments and interface stress concentration, but may also lead to the sealing failure of valves, flanges and other connection nodes, seriously threatening the structural safety of the water transmission system. Summary of the Invention

[0004] In view of the defects and problems of existing water pipeline supports, this invention provides a self-resetting vibration damping support for water pipelines based on Fe-SMA shape memory metal. The support has a unique structure and ingenious design, which can effectively solve the problem that existing water pipeline supports cannot actively compensate for the cumulative permanent displacement caused by foundation settlement or component wear after long-term operation.

[0005] The solution adopted by this invention to solve its technical problem is as follows: a vibration damping support for water pipelines based on Fe-SMA shape memory metal, comprising an outer support, an inner support mechanism, and a thermally activated compensation mechanism. The inner support mechanism is fitted onto the water pipeline, and the outer support is fitted around the inner support mechanism for fixed installation with an external foundation. The thermally activated compensation mechanism is disposed in the annular space between the inner support mechanism and the outer support. The thermally activated compensation mechanism includes a connector and a symmetrical functional composite layer. The connector is made of beryllium bronze. The symmetrical functional composite layer includes a segmented shape memory metal ring. The inner and outer ring surfaces of the segmented shape memory metal ring are provided with a heating layer and a heat insulation layer from the inside to the outside. The functional layers of the symmetrical functional composite layer are fixed together by the connector to form a functional ring. The inner and outer ring surfaces of the functional ring are supported and abutted together by the inner support mechanism and the outer support, respectively. The heating layer is connected to a control module for selectively activating the heating layer to activate the segmented shape memory metal ring, so that the segmented shape memory metal ring undergoes a phase change and generates a restoring force, driving the inner support mechanism to displace relative to the outer support.

[0006] The outer support includes an annular side shell and a support frame. The annular side shell is fitted onto the outside of the inner support mechanism, and the support frame is located at the bottom of the annular side shell and is fixedly connected to the annular side shell.

[0007] The inner support mechanism includes an inner support ring and an outer support ring coaxially sleeved together. The inner support ring is fitted onto the water supply pipe and is composed of two symmetrically arranged semi-rings. The outer ring surface of each of the two semi-rings is provided with multiple I-shaped support legs evenly spaced along the circumference. The outer ends of the I-shaped support legs are fixedly connected to the inner end face of the outer support ring.

[0008] The I-beam support leg includes a radially arranged diaphragm plate. One end of the diaphragm plate is fixedly connected to the outer ring surface of the inner support ring, and the other end of the diaphragm plate is fixedly provided with an arc-shaped base plate. The outer arc surface of the arc-shaped base plate abuts against the inner arc surface of the outer support and is fixedly connected together.

[0009] The inner support ring has a rubber buffer pad on its inner surface to buffer the vibration transmission between the pipe and the inner support ring.

[0010] The segmented shape memory metal ring includes multiple arc-shaped shape memory metal blocks that are sequentially connected along the circumferential direction. The shape memory metal blocks are made of iron-based shape memory alloy material. A connector is provided at the joint of every two adjacent shape memory metal blocks. The connector is sleeved on the outside of the joint end to fix the two adjacent shape memory metal blocks together through each functional layer.

[0011] The connector includes an annular ring body and a locking assembly. The two ends of the annular ring body are respectively provided with radially outwardly extending flanges, and bolt through holes are opened on the flanges. The annular ring body is sleeved on the symmetrical functional composite layer, and the two flanges of the annular ring body are brought together and locked by the locking assembly, so that the annular ring body radially contracts to hold and fix the mating ends of each functional layer and two adjacent memory metal blocks together.

[0012] The annular space is sealed at both ends with annular sealing plates, and either of the two annular sealing plates is provided with a wire hole that communicates with the annular space. A wire is sealed and inserted into the wire hole, and the wire is connected to the two heating layers in the symmetrical functional composite layer to provide the power required for heating.

[0013] The beneficial effects of this invention: The self-resetting vibration damping support for water pipelines based on Fe-SMA shape memory metal provided by this invention achieves self-sensing and active compensation for the cumulative permanent displacement of the pipeline by integrating a displacement monitoring module with a symmetrical functional composite layer composed of a heating layer, a heat insulation layer, and a segmented shape memory metal ring. Specifically, when the rubber buffer pad wears or the foundation settles, causing the inner support mechanism to generate excessive displacement relative to the outer support, the control module can selectively activate the heating layer, causing the iron-based shape memory alloy to undergo an austenitic phase transformation and generate a radial restoring force. This restoring force acts on the inner support mechanism through a connector, thereby driving the pipeline to automatically reset to the initial design axis, fundamentally solving the problem that traditional passive supports cannot eliminate permanent deformation. Based on the above structure, this support not only retains the passive vibration damping capability of the rubber buffer pad and the heat insulation layer foam material, but also utilizes the symmetrical arrangement of the inner and outer double heating layers to ensure the uniformity of heating of the large ring shape memory alloy and the stability of the restoring force. At the same time, the heat insulation layer effectively blocks the diffusion of heat to surrounding components, avoiding thermal damage to rubber parts and electronic components, and realizing the structural integration of thermal management and vibration damping functions. Furthermore, by designing the shape memory metal ring as a multi-segment arc-shaped block splicing structure and using a flanged annular ring body for radial clamping fixation, the manufacturing and assembly difficulty of large intelligent drive components is significantly reduced, while ensuring tight fit and long-term reliability between functional layers. Moreover, because the control module can differentially heat different shape memory metal zones based on displacement monitoring data, this support can also generate asymmetric restoring force to cope with simultaneous vertical settlement and horizontal displacement, achieving multi-dimensional vector displacement compensation and significantly improving adaptability to complex geological conditions. Based on this, without the need for external mechanical jacking intervention, this support effectively reduces the additional stress and interface leakage risk caused by pipeline support point displacement, which is of significant importance for improving the operational safety of water supply network systems and reducing life-cycle maintenance costs. Attached Figure Description

[0014] Figure 1This is a three-dimensional structural schematic diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the installation position of the symmetrical functional composite layer of the present invention.

[0016] Figure 3 This is a schematic diagram of the symmetrical functional composite layer structure of the present invention. Figure 4 This is a schematic diagram of the connector structure of the present invention.

[0017] The following numbers are used in the diagram: 1 is the water supply pipe, 2 is the internal support mechanism, 21 is the internal support ring, 211 is the semi-ring body, 23 is the I-beam support leg, 231 is the diameter plate, 232 is the arc-shaped bottom plate, 233 is the rib plate, 3 is the outer support ring, 4 is the annular sealing plate, 5 is the wire hole, 6 is the annular side shell, 7 is the support frame, 8 is the symmetrical functional composite layer, 81 is the segmented memory metal ring, 811 is the arc-shaped memory metal block, 82 is the heating layer, 83 is the heat insulation layer, 9 is the connector, 91 is the annular ring body, 92 is the flange, 93 is the wing nut, and 94 is the bolt. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0019] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are simplified schematic diagrams, used only to clearly illustrate the structural relationships related to the innovative points of the present invention. The dimensions, proportions, and shapes of the components do not represent actual products and should not be construed as limiting the scope of protection of the present invention.

[0020] like Figure 1-4 As shown, the Fe-SMA shape memory metal-based self-resetting vibration damping support for water pipelines in this embodiment mainly comprises three core components: an outer support for fixing to the external foundation, an inner support mechanism for directly supporting the pipeline and providing primary buffering, and a heat-activated compensation mechanism disposed between the two for active adjustment and displacement compensation. The inner support mechanism is fitted onto the water pipeline 1, the outer support is fitted around the inner support mechanism, and the heat-activated compensation mechanism is disposed in the annular space between the inner support mechanism and the outer support.

[0021] like Figure 2As shown, the outer support includes an annular side shell 6 and a support frame 7. The annular side shell 6 is a cylindrical structure with a smooth inner wall, which is fitted onto the outside of the inner support mechanism to provide an external support surface for the thermal activation compensation mechanism. In this embodiment, the annular side shell 6 is composed of two semi-annular shells fixedly connected together by bolts and nuts. The support frame 7 is located at the bottom of the annular side shell 6 and is fixedly connected to the annular side shell 6. In this embodiment, in order to reduce the structural weight while ensuring the support strength, the support frame 7 adopts a triangular truss support structure made of Q355 low alloy high strength steel. In addition, to further enhance the stability after the support is installed and prevent slippage, the bottom of the support frame 7 is also provided with nitrile rubber anti-slip pads. In actual engineering applications, the support frame 7 can be fixed to the concrete base or other external foundations by means of embedded parts or welding connections.

[0022] like Figure 1 As shown, the inner support mechanism, being a component in direct contact with the pipeline, needs to possess good load-bearing capacity and a certain degree of flexibility. In this embodiment, the inner support mechanism is preferably made of high-strength alloy steel. The inner support mechanism 2 includes an inner support ring 21 and an outer support ring 3 coaxially sleeved together. The inner support ring 21 is fitted onto the water pipeline 1. For ease of installation and disassembly, the inner support ring 21 is composed of two symmetrically arranged semi-ring bodies 211. The mating end faces of the two semi-ring bodies 211 are provided with ear plates, which can be locked by fasteners such as bolts. On the outer ring surface of each semi-ring body 211, multiple I-beam support legs 23 are evenly spaced along the circumferential direction. The outer ends of the I-beam support legs 23 are fixedly connected to the inner end face of the outer support ring 3. Through this radial support structure, the pipeline load can be evenly transferred to the outer support ring 3.

[0023] In this embodiment, the specific structure of the I-beam support leg 23 is as follows: it includes a radially arranged diameter plate 231, one end of which is welded to the outer ring surface of the inner support ring 21, and the other end is fixedly provided with an arc-shaped base plate 232. The outer arc surface of the arc-shaped base plate 232 abuts against the inner arc surface of the outer support ring 3 and is fixedly connected together by welding or high-strength bolts. This structure can effectively resist bending moment and shear force.

[0024] Furthermore, ribs 233 are symmetrically provided on both sides of the diameter plate 231. The ribs 233 are in the shape of right trapezoids. The ribs 233 are welded together with the outer ring surface of the inner support ring, the diameter plate 231 and the inner arc surface of the arc-shaped base plate 232, which further enhances the support strength of the I-beam support leg.

[0025] To block the transmission path of high-frequency vibration, a rubber buffer pad is fitted on the inner ring surface of the inner support ring 21. This rubber buffer pad is tightly fitted between the outer wall of the water supply pipe 1 and the inner wall of the inner support ring 21 to buffer the direct transmission of pipe vibration to the inner support mechanism, thereby achieving the first stage of passive vibration reduction.

[0026] The thermally activated compensation mechanism is the core of realizing the active compensation function of this invention, such as... Figure 3 As shown, the thermal activation compensation mechanism includes a connector 9 and a symmetrical functional composite layer 8; wherein, the symmetrical functional composite layer 8 includes a segmented shape memory metal ring 81, which is made of iron-based shape memory alloy (Fe-SMA); in this embodiment, for ease of manufacturing and installation, the segmented shape memory metal ring 81 is composed of multiple arc-shaped shape memory metal blocks 811 that are sequentially connected along the circumferential direction.

[0027] Furthermore, on both the inner and outer ring surfaces of the segmented shape memory metal ring 81, a heating layer 82 and a heat insulation layer 83 are sequentially provided from the inside to the outside. Both the heating layer 82 and the heat insulation layer 83 are annular, meaning that the heating layer 82 is attached to the surface of the shape memory metal ring, while the heat insulation layer 83 covers the outside of the heating layer 82. The heating layer 82 can be a flexible heating film or a heating sheet etched with circuitry, and it is connected to a control module for selectively activating heating. The heat insulation layer 83 can be made of materials such as foamed rubber or aerogel felt. Its function is twofold: firstly, to prevent heat from diffusing outward and damaging nearby electronic components (such as wires) or affecting the material properties of the outer support and inner support mechanism; secondly, the foamed rubber material itself has a certain degree of elasticity, which can help absorb and disperse vibration energy.

[0028] The functional layers of the symmetrical functional composite layer 8 (heat insulation layer 83, heating layer 82, segmented memory metal ring 81, heating layer 82, heat insulation layer 83) are stacked in sequence to form an overall structure of a functional ring; the connector 9 is used to fix these layered structures and adjacent arc-shaped memory metal blocks 811 into a solid whole.

[0029] Specifically: a connector 9 is provided at the joint of every two adjacent arc-shaped memory metal blocks 811. The connector 9 is sleeved on the outside of the joint end and uses its radial contraction force to hold and fix the ends of each functional layer and the two memory metal blocks together.

[0030] like Figure 4As shown, connector 9 is made of beryllium bronze. Utilizing its high elastic limit and elastic following characteristics, it coordinates with Fe-SMA contraction motion to achieve synchronous radial contraction of the inner ring. Through elastic deformation, the dispersed restoring force is integrated into a uniform circumferential resultant force, ensuring smooth and efficient force transmission to the inner support mechanism and completing pipe repositioning. In one implementation, connector 9 includes an annular ring body 91 and a locking assembly. Both ends of the annular ring body 91 are respectively provided with radially outward extending flanges 92. Bolt through holes are opened on the flanges 92. During assembly, the annular ring body 91 is fitted onto the stacked symmetrical functional composite layer 8. Then, the bolts 94 of the locking assembly are inserted into the bolt through holes of the two flanges 92, and a self-locking wing nut 93 is provided. By tightening the self-locking wing nut, the two flanges 92 can be brought closer together, thereby causing the annular ring body 91 to contract radially, firmly clamping the internal functional layer and memory metal block. This connection method not only ensures the reliability of the structural connection but also facilitates on-site assembly and maintenance.

[0031] After assembly, the entire functional ring, consisting of the symmetrical functional composite layer 8 and multiple connectors 9, is tightly assembled between the outer ring of the outer support ring 3 and the inner ring of the annular side shell 6. Since the outer ring of the outer support ring 3 and the inner ring of the functional ring match in curvature, the inner and outer ring surfaces of the functional ring respectively support and abut against the outer support ring 3 of the inner support mechanism and the annular side shell 6 of the outer bracket, thereby forming a reliable force transmission path.

[0032] This support also includes a displacement monitoring module, which can use a laser displacement sensor, an eddy current sensor, or a high-precision resistive displacement gauge. Its probe can be installed on the annular side shell 6 to monitor the relative displacement between the inner support mechanism and the outer support in real time, such as monitoring the vertical sinking or the horizontal eccentricity. The output end of the displacement monitoring module is electrically connected to the input end of the control module, thereby controlling the start and stop of the heating layer 82 according to the monitoring results, forming a closed-loop control.

[0033] When the water pipeline 1 vibrates, the self-resetting vibration damping support based on Fe-SMA shape memory metal provided in this embodiment first attenuates and isolates the vibration through the rubber buffer pad. The residual vibration is transmitted to the thermally activated compensation mechanism through the internal support mechanism. At this time, since the vibration energy is small and is a non-permanent deformation, the foamed rubber in the insulation layer 83 can absorb and disperse this vibration energy, thereby achieving a further vibration damping effect.

[0034] After long-term operation, if either of the following two situations occurs: first, the rubber buffer pad gradually wears down and thins due to long-term pressure and vibration; second, uneven settlement occurs in the foundation under the support frame 7, both situations will cause the inner support mechanism (along with the water pipeline 1) to have a cumulative permanent displacement exceeding the allowable range relative to the outer support, such as the sinking of the pipeline centerline. At this time, the displacement monitoring module detects that the displacement value exceeds the standard and sends a trigger signal to the control module.

[0035] After receiving the signal, the control module powers the heating layer 82. Due to the presence of the heat insulation layer 83, the heat is directed and efficiently applied to the segmented shape memory metal ring 81. When each arc-shaped shape memory metal block 811 is heated above its austenite phase transformation completion temperature, the iron-based shape memory alloy undergoes a reverse phase transformation from martensite to austenite. Since the Fe-SMA material is endowed with a shape memory effect of "perfect circle" during manufacturing, the shape memory metal ring in the deformed state (e.g., flattened or stretched due to sedimentation) will generate huge radial recovery stress, striving to restore its initial perfect circle state.

[0036] The restoring force, through the coordinated action of multiple connectors 9, forms a unified radial driving force. The outer support ring 3, which was originally offset downwards due to subsidence, is subjected to an upward resultant force component generated by the functional ring's recovery. This resultant force, through the outer support ring 3 and the inner support mechanism, forcibly lifts the water pipeline 1 upwards until the center of the outer support ring 3 coincides with the center of the functional ring again, thereby eliminating the vertical displacement caused by wear or settlement and restoring the pipeline to its original design elevation. Once the displacement compensation is in place, the displacement monitoring module sends a feedback signal, and the control module immediately cuts off the power to the heating layer 82. After cooling, the shape memory metal ring returns to the martensitic state but remains stable in its new position (i.e., the initial position after recovery), thus achieving the active elimination of permanent deformation. Example

[0037] The difference between Example 2 and Example 1 is that, in order to prevent impurities such as mud and water vapor from entering the interior of the annular space and affecting the normal operation of the functional layer, annular sealing plates 4 are installed at both ends of the annular space. On any one of the annular sealing plates 4, there is a wire hole 5 that communicates with the annular space. A wire is sealed and inserted into the wire hole 5. One end of the wire is connected to the two heating layers 82 in the symmetrical functional composite layer 8, and the other end is led out to the outside to connect with the power supply and control module to provide the power required for heating.

[0038] Furthermore, a sealed insulating sleeve made of nitrile rubber (NBR) is installed inside the wire hole 5, and the wire passes through the sealed insulating sleeve into the annular space.

[0039] It should be noted that the above embodiments and accompanying drawings are merely illustrative examples of the core principles and key structures of the present invention, "A Self-Resetting Vibration Damping Support for Water Pipelines Based on Fe-SMA Shape Memory Metal." The accompanying drawings are simplified schematic diagrams, intended to clearly illustrate the structures, connections, and working logic related to the innovative points of the technical solution, and are not intended to limit the complete form of the actual product. This specification focuses on the innovative technical means necessary to achieve the invention's objectives and solve the technical problems. While auxiliary or common-sense details such as sealing structure details, conventional circuit designs, standard sensor selection, specific forms of connecting flanges, and conventional programming logic of control modules, which can be implemented by those skilled in the art without creative effort, are not elaborated upon, they should be understood as naturally included in the specific implementation of this invention and fall within the scope of protection and implementation of this technical solution. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A self-resetting vibration damping support for water pipelines based on Fe-SMA shape memory metal, characterized in that, It includes an outer support, an inner support mechanism, and a thermally activated compensation mechanism. The inner support mechanism is fitted onto the water supply pipeline, and the outer support is fitted around the inner support mechanism for fixed installation with the external foundation. The thermal activation compensation mechanism is disposed in the annular space between the inner support mechanism and the outer bracket. The thermal activation compensation mechanism includes a connector and a symmetrical functional composite layer. The symmetrical functional composite layer includes a segmented shape memory metal ring. The inner and outer ring surfaces of the segmented shape memory metal ring are provided with a heating layer and a heat insulation layer from the inside to the outside. The functional layers of the symmetrical functional composite layer are fixed together by the connector to form a functional ring. The inner and outer ring surfaces of the functional ring are supported and abutted together by the inner support mechanism and the outer bracket, respectively. The heating layer is connected to a control module for selectively activating the heating layer to activate the segmented shape memory metal ring, so that the segmented shape memory metal ring undergoes a phase change and generates a restoring force, driving the inner support mechanism to displace relative to the outer bracket.

2. The self-resetting vibration damping support for water pipelines based on Fe-SMA shape memory metal according to claim 1, characterized in that, The outer support includes an annular side shell and a support frame. The annular side shell is fitted onto the outside of the inner support mechanism, and the support frame is located at the bottom of the annular side shell and is fixedly connected to the annular side shell.

3. The self-resetting vibration damping support for water pipelines based on Fe-SMA shape memory metal according to claim 2, characterized in that, The inner support mechanism includes an inner support ring and an outer support ring coaxially sleeved together. The inner support ring is fitted onto the water supply pipe and is composed of two symmetrically arranged semi-rings. The outer ring surface of each of the two semi-rings is provided with multiple I-shaped support legs evenly spaced along the circumference. The outer ends of the I-shaped support legs are fixedly connected to the inner end face of the outer support ring.

4. The self-resetting vibration damping support for water pipelines based on Fe-SMA shape memory metal according to claim 1, characterized in that, The I-beam support leg includes a radially arranged diaphragm plate. One end of the diaphragm plate is fixedly connected to the outer ring surface of the inner support ring, and the other end of the diaphragm plate is fixedly provided with an arc-shaped base plate. The outer arc surface of the arc-shaped base plate abuts against the inner arc surface of the outer support and is fixedly connected together.

5. The self-resetting vibration damping support for water pipelines based on Fe-SMA shape memory metal according to claim 4, characterized in that, The inner support ring has a rubber buffer pad on its inner surface to buffer the vibration transmission between the pipe and the inner support ring.

6. The self-resetting vibration damping support for water pipelines based on Fe-SMA shape memory metal according to claim 1, characterized in that, The segmented shape memory metal ring includes multiple arc-shaped shape memory metal blocks that are sequentially connected along the circumferential direction. The shape memory metal blocks are made of iron-based shape memory alloy material. A connector is provided at the joint of every two adjacent shape memory metal blocks. The connector is sleeved on the outside of the joint end to fix the two adjacent shape memory metal blocks together through each functional layer.

7. The self-resetting vibration damping support for water pipelines based on Fe-SMA shape memory metal according to claim 6, characterized in that, The connector is made of beryllium bronze and includes an annular ring body and a locking assembly. The two ends of the annular ring body are respectively provided with radially outwardly extending flanges, and bolt through holes are opened on the flanges. The annular ring body is sleeved on the symmetrical functional composite layer, and the two flanges of the annular ring body are brought together and locked by the locking assembly, so that the annular ring body radially contracts to hold and fix the mating ends of each functional layer and two adjacent memory metal blocks together.

8. The self-resetting vibration damping support for water pipelines based on Fe-SMA shape memory metal according to claim 1, characterized in that, The annular space is sealed at both ends with annular sealing plates, and either of the two annular sealing plates is provided with a wire hole that communicates with the annular space. A wire is sealed and inserted into the wire hole, and the wire is connected to the two heating layers in the symmetrical functional composite layer to provide the power required for heating.

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