Self-resetting hierarchical energy dissipation pipeline damping joint

Abstract

The application discloses a self-resetting hierarchical energy dissipation type pipeline damping joint, which comprises an outer sleeve, connecting pieces, a water passing core cylinder, a hierarchical energy releasing device, a controller and a sensor assembly. The outer sleeve is symmetrically provided with the connecting pieces at both ends, and the middle part of the connecting piece is provided with a water passing channel in the axial direction. The water passing core cylinder is coaxially arranged in the outer sleeve, and the left and right ends of the water passing core cylinder are respectively slidably inserted into the water passing channel of the connecting piece on the same side. The sensor assembly is arranged on the water passing core cylinder and connected with the controller, and is used for monitoring the position of the water passing core cylinder and the water flow pressure in the water core cylinder. The application aims to provide a dual-state hierarchical energy dissipation type damping joint which can keep high rigidity constraint in normal state, intelligently release displacement to dissipate energy under hierarchical impact, and automatically reset and recover to the initial locking state without manual intervention after the impact.

Description

Technical Field

[0001] This invention belongs to the field of water pipeline safety protection technology, specifically relating to a self-resetting graded energy-dissipating pipeline vibration damping joint. Background Technology

[0002] In pipeline transportation systems, pump station pressure pipelines, industrial fluid transportation equipment, and some electromechanical connection structures, connection nodes not only bear the functions of axial force transmission and positioning between components, but also need to withstand vibrations, pulsating impacts, and sudden overloads generated during operation. Especially in water pipelines, pressure pipelines, and pump and valve systems, transient impact loads caused by start-up and shutdown conditions, rapid valve closure, water hammer effects, or external disturbances can easily lead to localized stress concentrations at joints, flanges, or connection transitions, resulting in loose connections, sealing failures, structural fatigue, or even localized damage.

[0003] In existing engineering projects, to reduce the impact of vibration and shock, rigid connection structures, elastic support structures, ordinary spring buffer structures, or additional damping devices are commonly used. Among these, while rigid connection structures offer high positioning accuracy and direct force transmission, their buffering capacity is limited under impact loads, and they are prone to generating large peak stresses. While elastic connection or spring buffer structures have a certain vibration reduction effect, they often remain in a flexible support state under normal operating conditions, which can easily lead to problems such as insufficient stiffness at the connection points, difficulty in controlling displacement, and poor long-term positioning stability. In addition, although some existing buffer or protection mechanisms can release displacement or absorb energy under overload, they often have defects such as not being able to automatically return to the original state after triggering, requiring manual reset, and having insufficient repeatability, making it difficult to meet the engineering requirements of long-term service, automatic recovery, and stable operation. Summary of the Invention

[0004] To address the existing defects and problems, this invention provides a self-resetting graded energy-dissipating pipe vibration damping joint. This joint has a unique structure and ingenious design, aiming to maintain high rigidity under normal conditions, intelligently release displacement to dissipate energy under graded impacts, and automatically reset and return to the initial locked state after the impact without manual intervention.

[0005] The solution adopted by this invention to solve its technical problem is: a self-resetting, graded energy-dissipating pipe vibration damping joint, including an outer sleeve, connectors, a water-passing core cylinder, a graded energy-dissipating device, a controller, and a sensor assembly. Connectors are symmetrically installed at both ends of the outer sleeve, and a water-passing channel is provided axially in the middle of the connectors. The water-passing core cylinder is coaxially disposed inside the outer sleeve, and its left and right ends are slidably inserted into the water-passing channels of the connectors on the same side. The sensor assembly is installed on the water-passing core cylinder and connected to the controller for monitoring the position of the water-passing core cylinder and the water flow pressure inside the core cylinder. The graded energy-dissipating device includes a locking mechanism and a core cylinder baffle. The system includes an elastic buffer assembly. The core tube baffle is fixedly installed on the water-passing core tube inside the outer sleeve. In its natural state, the elastic buffer assembly pushes the water-passing core tube, causing the core tube baffle to move to its initial position. Multiple locking mechanisms connected to the controller are arranged sequentially from front to back inside the outer sleeve. The controller controls the locking mechanisms at each level to switch their locking states based on the detection results from the sensor assembly. When a locking mechanism is in the locked state, it prevents the core tube baffle from passing through it. When a locking mechanism is in the unlocked state, the core tube baffle can pass through it. After the core tube baffle passes through the locking mechanism, the controller switches the locking mechanism to the locked state.

[0006] The controller has multiple preset graded pressure thresholds, which correspond to the locking mechanisms arranged sequentially from front to back, from smallest to largest. When the water pressure reaches the Nth graded pressure threshold, the controller controls the Nth locking mechanism to release the locking state sequentially from front to back. When the controller detects that the water pressure has dropped back to the normal water supply pressure range, it controls the locking mechanism to release the locking state sequentially from back to front.

[0007] The locking mechanism includes multiple locking modules distributed along the circumference. Each locking module includes a fixed base, a hinge joint, a right-angle baffle, and a locking assembly. The hinge joint is radially fixed to the inner wall of the outer sleeve via a base. The right-angle end of the right-angle baffle is hinged to the end of the hinge joint via a hinge shaft, and permanent magnets are installed on both the front and rear plates of the right-angle baffle. When the hinge shaft of the right-angle baffle rotates, the plate of the right-angle baffle that approaches the base is pre-attracted to the base via the permanent magnets. In this state, the other plate of the right-angle baffle moves towards the core cylinder and enters the movement trajectory of the core cylinder baffle. The controller locks the plate that is pre-attracted to the base via the locking assembly.

[0008] After locking, the rear plate of the right-angle baffle enters the movement trajectory of the core tube baffle to prevent the core tube baffle from passing backward through the locking mechanism; the front plate of the right-angle baffle enters the movement trajectory of the core tube baffle to prevent the core tube baffle from passing backward through the locking mechanism; and when the core tube baffle passes through the locking mechanism, it will push the plate of the right-angle baffle facing the water-passing core tube, driving the right-angle baffle to rotate in the moving direction, so that the plate originally facing the direction is pre-adsorbed together with the fixed seat.

[0009] The water passage is coaxially arranged with the outer sleeve, and the diameter of the water passage is smaller than the inner diameter of the outer sleeve.

[0010] The elastic buffer assembly includes a support spring and two symmetrically arranged spring mounting seats. The rear spring mounting seat is coaxially fixedly installed on the end face of the connecting piece on the rear side of the core cylinder baffle, and the front spring mounting seat is fixedly fitted onto the water-passing core cylinder. The support spring is arranged between the two spring mounting seats, and the two ends of the support spring abut against the spring mounting seats on the adjacent sides respectively.

[0011] Both spring mounting seats have stepped surfaces at their opposite ends to abut against the support springs. The support springs are positioned between the two spring mounting seats, with both ends of the support springs respectively fitted onto the adjacent spring mounting seats and abutting against the corresponding stepped surfaces.

[0012] The water-passing core cylinder on the front side of the core cylinder baffle is provided with convex rings at intervals. When the water-passing core cylinder and the core cylinder baffle move forward to the preset initial position, the convex rings abut against the end of the front connecting piece. The beneficial effects of this invention are as follows: The self-resetting, graded energy-dissipating pipeline vibration damping joint provided by this invention utilizes a multi-stage locking mechanism and a right-angle flip-up baffle to form a structural interlock. Under normal operating conditions without overpressure impact, it provides a gapless, rigid axial constraint on the water-passing core cylinder, eliminating the micro-movement of the core cylinder and repeated shearing friction of the sealing surface caused by water flow pulsation. This avoids low-frequency resonance and knocking noise in the pipeline system and effectively extends the maintenance-free cycle of the sealing element. When transient impacts such as water hammer or earthquakes occur, the controller, based on multiple internally set graded pressure thresholds, controls the corresponding locking mechanisms from front to back to sequentially release the locking, releasing the water-passing core cylinder to move backward in stages. This causes the support spring to undergo multi-stage stepped compression, decomposing and absorbing the energy of a single severe impact, significantly suppressing the peak transient load transmitted to the pipeline structure, and preventing the spring from over-exerting all at once. The controller automatically locks the cylinder baffle in case of failure and maintains a lock for minor disturbances below the threshold, achieving adaptive matching between impact intensity and clearance stroke. After the impact decays and the water pressure returns to the normal range, the controller executes a reverse unlocking sequence from back to front. Driven by the elastic potential energy released by the support spring, the core cylinder baffle returns and sequentially pushes the right-angle baffles at each stage to flip, reset, and relock. This fully automatic mechanical reconfiguration can be completed without manual intervention, significantly reducing pipeline maintenance costs. The reverse sequence unlocking eliminates the risk of rigid collision between the core cylinder baffle and the front structure and secondary water hammer during the reset process. At the same time, the right-angle baffle maintains its flipped posture with the help of permanent magnet pre-adsorption, completing the state switch at the moment of energy absorption or reset. Even if the control system loses power at the moment of impact, it can reliably maintain the established locking or clearance state, possessing extremely high inherent safety. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention.

[0014] Figure 2 This is a three-dimensional structural schematic diagram of the present invention.

[0015] Figure 3 This is a schematic diagram of the internal structure of the outer sleeve of the present invention.

[0016] Figure 4 This is a schematic diagram of the locking module structure of the present invention.

[0017] Figure 5 This is a schematic diagram of the attitude conversion process of the right-angle baffle of the locking module of the present invention.

[0018] In the diagram, the following numbers are used: 100 is the outer sleeve, 200 is the connector, 210 is the water passage, 300 is the water passage core, 310 is the core baffle, 401 is the support spring, 402 is the spring mounting base, 600 is the multi-stage locking mechanism, 601 is the locking module, 611 is the fixing base, 612 is the hinge joint, 613 is the right-angle baffle, 613a is the front plate, 613b is the rear plate, and 614 is the locking assembly. Detailed Implementation Example

[0019] This embodiment provides a vibration damping joint with an automatic relocking function, such as Figure 1-5 As shown, it mainly includes an outer sleeve 100, a connector 200, a water-passing core cylinder 300, a staged energy dissipation device, and a controller and sensor assembly.

[0020] The outer sleeve 100 is an axially extending cylindrical shell, serving as the base for supporting the movement of the internal core and installing the locking mechanism. Connectors 200 are symmetrically installed at both ends of the outer sleeve 100, and the connectors 200 can be sealed together with the outer sleeve 100 by means of threaded engagement, welding, or flange press-fitting. Each connector 200 has a water passage 210 extending axially through its middle section. The water passage 210 is coaxially arranged with the outer sleeve 100, and the diameter of the water passage 210 is smaller than that of the outer sleeve 100. The inner diameter of 00; a sliding sealing structure is provided between the inner wall of the water passage 210 and the outer wall of the end of the water passage core 300. For example, an annular groove is opened on the inner wall of the water passage 210 near the outer sleeve 100 and an O-ring is embedded, so that the water passage core 300 can slide axially relative to the connector 200 and prevent the medium inside the outer sleeve 100 from leaking outward; the end of the connector 200 away from the outer sleeve 100 is provided with a connecting flange or threaded interface for sealing connection with the external conveying pipeline.

[0021] The water-passing core cylinder 300 is a hollow cylindrical body, coaxially inserted inside the outer sleeve 100; the left and right ends of the water-passing core cylinder 300 are respectively slidably inserted into the water-passing channels 210 of the connecting parts 200 on the same side, and the internal flow channel of the water-passing core cylinder 300 and the water-passing channels 210 at both ends together form a continuous axial water-passing channel.

[0022] The graded energy release device includes a locking mechanism 600, a core tube baffle 310, and an elastic buffer assembly 400. The core tube baffle 310 is an annular baffle. The core tube baffle 310 is fixedly sleeved on the outer wall of the middle section of the water-passing core tube 300 located inside the outer sleeve 100. The core tube baffle 310 serves as the interface for transmitting axial force and is used to contact and interfere with the locking mechanisms of each stage described later.

[0023] The elastic buffer assembly 400 is installed on the water-passing core cylinder 300 inside the outer sleeve 100. In this embodiment, the elastic buffer assembly 400 includes a support spring 401 and two symmetrically arranged spring mounting seats 402. The spring mounting seats 402 are annular structures. The spring mounting seat 402 located on the rear side is coaxially fixedly installed on the end face of the rear connecting member 200 of the core cylinder baffle 310. The tail end of the water-passing core cylinder 300 passes through the spring mounting seat 402 located on the rear side and is matched and inserted into the rear connecting member 200. The spring mounting seat 401 located on the front side is fixedly fitted on the outer sleeve 100. On the water-passing core cylinder 300, each of the two spring mounting seats 402 has a stepped surface at one end facing each other to abut against the top spring. The support spring 401 is disposed between the two spring mounting seats 402, and the two ends of the support spring 401 are respectively sleeved on the spring mounting seats 402 on the adjacent side and abut against the corresponding stepped surface. In the natural state, the buffer assembly 400 always applies a forward elastic thrust, driving the water-passing core cylinder 300 and the core cylinder baffle 310 to move forward to the preset initial position. The initial position of the core cylinder baffle is located in front of the foremost locking mechanism 600.

[0024] Furthermore, a protruding ring is provided at intervals on the water-passing core cylinder 300 on the front side of the core cylinder baffle 310. The replacement height is lower than the height of the core cylinder baffle 310. When the water-passing core cylinder 300 and the core cylinder baffle 310 move forward to the preset initial position, the protruding ring abuts against the end of the front connecting member to constrain the initial position of the water-passing core cylinder 300.

[0025] The outer sleeve 100 on the front side of the elastic buffer component 400 is provided with multiple locking mechanisms 600 arranged sequentially from front to back (with the direction of the water flow impact as the rearward direction). This embodiment takes the setting of three locking mechanisms as an example for explanation. It can be understood that, depending on the pipe diameter and the design impact stroke, the number of locking mechanisms can be increased or decreased to two, four or more, all of which are within the protection scope of this solution. The structural principle of each locking mechanism is the same, and the only difference is in the axial installation position and the corresponding trigger threshold setting.

[0026] The stepped surface of the spring seat is provided with a viscoelastic buffer layer; at the contact point between the viscoelastic buffer layer and the end face of the supporting spring, it is used to generate hysteresis energy dissipation and play a buffering role when the spring is compressed and transmits force. The viscoelastic buffer layer is made of one or more materials selected from polyurethane, nitrile rubber, EPDM rubber or silicone rubber.

[0027] The locking mechanism 600 is fixedly installed on the locking module 601 on the inner wall of the outer sleeve 100. The locking module is connected to the controller. In this embodiment, each locking mechanism includes three locking modules that are fixedly installed on the inner wall of the outer sleeve 100 at intervals along the circumferential direction.

[0028] The locking module 601 includes a fixed base 611, a hinge joint 612, a right-angle baffle 613, and a locking assembly 614. The fixed base 611 serves as a base and is fixedly installed on the inner wall of the outer sleeve 100 radially along the outer sleeve 100 by screws or slots. The hinge joint 612 is formed in the middle of the fixed base 611, with its top end facing the water core cylinder radially. The right-angle baffle 613 includes a front plate 613a and a rear plate 613b vertically connected at their roots. There are various ways to manufacture the right-angle baffle 613. In this embodiment, the right-angle baffle 613 is formed by bending a plate at a 90-degree angle. Its bent right-angle end (i.e., the vertex) is hinged to the hinge joint 612 via a pivot, allowing the right-angle baffle 613 to rotate freely within a certain angle range around the hinge axis.

[0029] Permanent magnets are embedded at the ends of the front plate 613a and the rear plate 613b. When the hinge shaft of the right-angle baffle rotates, the plate of the right-angle baffle that is close to the base will be pre-attracted to the base through the permanent magnet, so that the right-angle baffle 613 is pre-held in the corresponding posture. In this state, the other plate of the right-angle baffle moves towards the water core cylinder and enters the movement trajectory of the core cylinder baffle. The locking component 614 is used to rigidly lock the right-angle baffle 613 after it has completed the adsorption.

[0030] In this embodiment, the locking component 614 uses an electromagnet. The electromagnets connected to the controller are symmetrically placed on the base on both sides of the hinge joint. When the electromagnet is activated, the electromagnet is energized to lock the plate of the right-angle baffle 613, which is pre-attached to the base by a permanent magnet. This prevents the right-angle baffle 613 from overcoming the magnetic attraction and flipping under the action of external force, thereby firmly locking the right-angle baffle 613 in the current working position.

[0031] After locking, the rear plate of the right-angle baffle enters the movement trajectory of the core tube baffle to prevent the core tube baffle from passing backward through the locking mechanism; the front plate of the right-angle baffle enters the movement trajectory of the core tube baffle to prevent the core tube baffle from passing backward through the locking mechanism; and when the core tube baffle passes through the locking mechanism, it will push the plate of the right-angle baffle facing the water-passing core tube, driving the right-angle baffle to rotate in the moving direction, so that the plate originally facing the direction is pre-adsorbed together with the fixed seat.

[0032] The sensor assembly is mounted on the water-passing core cylinder and connected to the controller to monitor the position of the water-passing core cylinder and the water flow pressure inside the core cylinder. In this embodiment, the sensor assembly includes at least a displacement sensor for detecting the axial displacement of the water-passing core cylinder and a pressure sensor for detecting the water flow pressure inside the core cylinder. The displacement sensor can be a linear variable differential transformer or a magnetostrictive displacement sensor, and the pressure sensor can be a piezoresistive pressure transmitter. The sensor assembly 500 transmits the collected displacement and pressure signals to the controller in real time.

[0033] The controller controls the locking mechanisms at each stage to switch locking states based on the detection results of the sensor components. When the locking mechanism is in the locked state, it prevents the core tube baffle from passing through it. When the locking mechanism is in the unlocked state, the core tube baffle can pass through it. After the core tube baffle passes through the locking mechanism, the controller switches the locking mechanism to the locked state. The controller has multiple preset graded pressure thresholds, which correspond to the locking mechanisms arranged sequentially from front to back, from smallest to largest. When the water flow pressure reaches the Nth graded pressure threshold, the controller controls the first N locking mechanisms to release their locking states sequentially from front to back. When the controller detects that the water flow pressure has fallen back to the normal water supply pressure range, it controls the locking mechanisms to release their locking states sequentially from back to front.

[0034] The controller has multiple preset threshold levels corresponding to the number of levels of the multi-level locking mechanism. Specifically, in this embodiment, the controller has preset a first-level threshold T1, a second-level threshold T2, and a third-level threshold T3, and T1 < T2 < T3. The first-level threshold T1 corresponds to the first-level locking mechanism located at the front, the second-level threshold T2 corresponds to the second-level locking mechanism located in the middle, and the third-level threshold T3 corresponds to the third-level locking mechanism located at the back. The value of the threshold represents the impact intensity level required to trigger the unlocking of the corresponding locking mechanism. At the same time, the controller also stores a reference range of state parameters representing normal water supply conditions, which is used to determine whether the impact event has ended. When the water pressure value reaches the Nth-level pressure threshold, the controller controls the first N levels of locking mechanisms to release their locking states sequentially from front to back. When the controller detects that the water pressure value has fallen back to the normal water supply pressure range, it controls the locking mechanisms to release their locking states sequentially from back to front.

[0035] During use, in normal water conveyance without impact, the water flow pressure and axial displacement of the water-passing core cylinder 300 monitored by the sensor assembly are both within the reference range corresponding to normal water conveyance conditions, and do not reach the first-level threshold T1. At this time, the right-angle baffles in the first-level locking mechanism, the second-level locking mechanism, and the third-level locking mechanism are all in the first working position. The right-angle baffles are all locked by their respective locking components 614. The so-called first working position means that the front plate 613a of the right-angle baffle 613 is attached to the fixed seat 611 and is attracted and locked, while the rear plate 613b extends towards the water-passing core cylinder into the core cylinder baffle movement trajectory.

[0036] The core tube baffle 310 is initially positioned close to the front side of the rear plate 613b of the first-stage locking mechanism, and the preload of the buffer assembly 400 pushes the water-passing core tube 300 forward, resulting in the water-passing core tube 300 being in a rigid, constrained state with no axial clearance. As a result, the joint exhibits high axial stiffness, effectively suppressing the slight movement of the water-passing core tube 300 caused by water flow pulsation in the pipeline, reducing the wear rate of the sealing ring at the water passage 210 of the connector 200 due to repeated shearing friction, extending the maintenance-free cycle of the sealing structure, and avoiding low-frequency resonance and knocking noise in the pipeline system caused by axial clearance.

[0037] When the pipeline system is subjected to moderate water hammer impact, the water pressure inside the water core cylinder 300 increases sharply, and there is a tendency to drive the water core cylinder 300 to move backward. The sensor assembly 500 collects the pressure value in real time and transmits it to the controller. The controller continuously compares the current monitoring value with the preset grading threshold.

[0038] When the monitored value reaches the first-level threshold T1 but has not yet reached the second-level threshold T2, the controller determines that a first-level impact event requiring intervention has occurred. It then issues an unlocking command to all locking components 614 of the first-level locking mechanism. The locking components 614 close, the right-angle baffle loses its locking attraction, and the hard locking of the front plate 613a is released. At this time, the right-angle baffle 613a is held in the first working position only by the attraction force of the permanent magnet 615. Because the water-passing core cylinder, under the action of the backward impact force, will drive the core cylinder baffle 310 to push the rear plate 613b backward, the torque generated by this force on the hinge shaft will exceed that of the front plate 613a. The sum of the permanent magnet adsorption torque at point 13a and the system friction torque causes the right-angle baffle 613 to rotate around the hinge joint 612. During rotation, the rear plate 613b gradually moves towards the fixed seat 611 and is eventually attracted and adhered to the rear side of the fixed seat 611 under the action of magnetic attraction. At the same time, the front plate 613a rises and enters the moving path of the core tube baffle 310. After the controller detects that the rotation has reached the correct position (which can be determined based on the position of the water-passing core tube), it controls the locking component 614 to open. The opened locking component 614 will attract and lock the rear plate 613b to the fixed seat 611. At this time, the first-stage locking mechanism switches to the second working position, that is, the front plate 613a is erected to block the forward movement and reset of the core tube baffle 310.

[0039] Since the first-stage locking mechanism loses its obstruction of the rearward movement of the core cylinder baffle 310, the water-passing core cylinder 300, under the impact force, causes the core cylinder baffle 310 to slide backward until its rear end face contacts and is blocked by the rear plate 613b of the second-stage locking mechanism 602. During this sliding process, the spring in the buffer assembly 400 is compressed by a distance corresponding to the axial distance between the first-stage locking mechanism and the second-stage locking mechanism 602. The compression of the spring converts some of the impact kinetic energy into elastic potential energy for storage, realizing the first-stage energy dissipation. At the same time, the work done by the right-angle baffle 613 in overcoming the magnetic attraction during its flipping also consumes some of the impact energy.

[0040] At this stage, since the first-stage locking mechanism has completed the switch to the second working position, its front plate 613a stands upright in front of the core cylinder baffle 310, thus pre-setting a reverse limiting condition for subsequent reset on the impact path. It is precisely because of the special configuration of the right-angle baffle 613—after locking, the two plates respectively undertake the responsibilities of blocking backward movement and blocking forward movement, and when not locked, they can passively rotate around the hinge axis under the unidirectional push of the core cylinder baffle 310—that each time a locking stage is released, the baffle automatically completes the switching of the blocking direction.

[0041] If the impact intensity increases further, the state parameters monitored by the sensor components successively reach the second-level threshold T2 and the third-level threshold T3. The controller follows the same judgment and execution logic, and sequentially sends unlocking commands to the second-level locking mechanism and the third-level locking mechanism, so that the right-angle baffle 613 of the corresponding level switches from the first working position to the second working position. The water-passing core cylinder 300 moves backward step by step and compresses the buffer component 400 step by step. When the third-level locking mechanism 603 is unlocked, the water-passing core cylinder 300 can slide to the maximum design stroke, and the buffer component 400 is compressed to a near-coiled state. The impact energy is gradually dissipated in the multi-stage stepped stroke, the peak load is effectively suppressed, and the spring is prevented from bearing excessive compression strain at one time, which could lead to coiling or fatigue damage.

[0042] When the water hammer shock wave has decayed or the earthquake displacement has returned to its original position, the water pressure inside the water-passing core cylinder 300 drops back to the normal water supply pressure range, and the axial displacement tends to stabilize. After the controller detects that the status parameters have returned to the normal range through the sensor components, it determines that it has entered the reset stage. At this time, the right-angle baffles 613 of the first-stage locking mechanism, the second-stage locking mechanism, and the third-stage locking mechanism are all in the second working position, that is, the front plates 613a of each stage are all erected in front of the core cylinder baffle 310, forming a reverse obstruction to the forward reset of the core cylinder baffle 310. The compressed buffer component 400 releases elastic potential energy and generates a forward reset thrust acting on the water-passing core cylinder 300.

[0043] The controller executes a reverse unlocking sequence from back to front: First, it sends an unlocking command to the locking component 614 of the third-level locking mechanism to release the mechanical lock on the third-level right-angle baffle 613; the core cylinder baffle 310 moves forward under the action of the reset thrust, and its front end face presses against the front plate 613a of the third-level right-angle baffle 613, forcing the third-level right-angle baffle 613 to overcome the magnetic attraction and flip in reverse, so that the front plate 613a is back against the fixed seat 611 and is attracted, and the rear plate 613b is lifted into the moving path. After the controller detects that the flip is in place, it controls the locking component 614 to lock the front plate 613a, and the third-level locking mechanism 603 returns to the first working position.

[0044] Subsequently, the controller sequentially performs the same reverse unlocking and resetting locking operations on the second-stage locking mechanism and the first-stage locking mechanism. Finally, the core tube baffle 310 passes over all locking mechanisms, returns to its initial position in front of the first-stage locking mechanism, and is blocked by the rear plate 613b of the re-locked right-angle baffles 613. At this point, all functional components of the joint are restored to their original constraint state before the impact, and automatic relocking is completed without manual intervention.

[0045] Throughout the entire response cycle, the two turning actions of the right-angle baffle 613—the backward flipping during impact and the forward flipping during reset—are directly driven by the axial kinetic energy of the water-passing core cylinder 300 itself, without the need for additional external power sources such as hydraulic pump stations or motors. Furthermore, the flipping, locking, and unlocking processes of the baffle do not involve any plastic deformation or fracture damage to any components, allowing the joint to withstand transient impacts repeatedly throughout its entire lifespan and fully restore its function.

[0046] 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 Dual-State Graded Energy-Dissipating Vibration Damping Joint with Automatic Relocking Function." The accompanying drawings are simplified schematic diagrams, intended to clearly illustrate the structural, process, or data flow relationships 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 dustproof design, heat dissipation layout, interface protocols, conventional filtering, and standard component selection, 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 protection and implementation scope of this technical solution.

Claims

1. A self-resetting, graded energy-dissipating pipeline vibration damping joint, characterized in that it includes an outer sleeve, connectors, a water-passing core cylinder, a graded energy-dissipating device, a controller, and a sensor assembly; connectors are symmetrically installed at both ends of the outer sleeve, and a water-passing channel is provided axially in the middle of the connectors; the water-passing core cylinder is coaxially disposed inside the outer sleeve, and its left and right ends are slidably inserted into the water-passing channels of the connectors on the same side; the sensor assembly is installed on the water-passing core cylinder and connected to the controller for monitoring the position of the water-passing core cylinder and the water flow pressure inside the core cylinder; the graded energy-dissipating device includes a locking mechanism, a core cylinder baffle, and an elastic buffer. The component includes a core tube baffle fixedly installed on the water-passing core tube inside the outer sleeve. In its natural state, the elastic buffer component pushes the water-passing core tube, causing the core tube baffle to move to its initial position. Multiple locking mechanisms connected to a controller are sequentially arranged from front to back inside the outer sleeve. The controller controls the locking mechanisms at each level to switch their locking states based on the detection results from the sensor component. When a locking mechanism is in the locked state, it prevents the core tube baffle from passing through it. When the locking mechanism is in the unlocked state, the core tube baffle can pass through it. After the core tube baffle passes through the locking mechanism, the controller switches the locking mechanism to the locked state.

2. The self-resetting graded energy-dissipating pipe vibration damping joint according to claim 1, characterized in that, The controller has multiple preset graded pressure thresholds, which correspond to the locking mechanisms arranged sequentially from front to back, from smallest to largest. When the water pressure reaches the Nth graded pressure threshold, the controller controls the Nth locking mechanism to release the locking state sequentially from front to back. When the controller detects that the water pressure has dropped back to the normal water supply pressure range, it controls the locking mechanism to release the locking state sequentially from back to front.

3. The self-resetting graded energy-dissipating pipe vibration damping joint according to claim 1, characterized in that, The locking mechanism includes multiple locking modules distributed along the circumference. Each locking module includes a fixed base, a hinge joint, a right-angle baffle, and a locking assembly. The hinge joint is radially fixed to the inner wall of the outer sleeve via a base. The right-angle end of the right-angle baffle is hinged to the end of the hinge joint via a hinge shaft, and permanent magnets are installed on both the front and rear plates of the right-angle baffle. When the hinge shaft of the right-angle baffle rotates, the plate of the right-angle baffle that approaches the base is pre-attracted to the base via the permanent magnets. In this state, the other plate of the right-angle baffle moves towards the core cylinder and enters the movement trajectory of the core cylinder baffle. The controller locks the plate that is pre-attracted to the base via the locking assembly.

4. The self-resetting graded energy-dissipating pipe vibration damping joint according to claim 3, characterized in that, After locking, the rear plate of the right-angle baffle enters the movement trajectory of the core tube baffle to prevent the core tube baffle from passing backward through the locking mechanism; the front plate of the right-angle baffle enters the movement trajectory of the core tube baffle to prevent the core tube baffle from passing backward through the locking mechanism; and when the core tube baffle passes through the locking mechanism, it will push the plate of the right-angle baffle facing the water-passing core tube, driving the right-angle baffle to rotate in the moving direction, so that the plate originally facing the direction is pre-adsorbed together with the fixed seat.

5. The self-resetting graded energy-dissipating pipe vibration damping joint according to claim 1, characterized in that, The water passage is coaxially arranged with the outer sleeve, and the diameter of the water passage is smaller than the inner diameter of the outer sleeve.

6. The self-resetting graded energy-dissipating pipe vibration damping joint according to claim 1, characterized in that, The elastic buffer assembly includes a support spring and two symmetrically arranged spring mounting seats. The rear spring mounting seat is coaxially fixedly installed on the end face of the connecting piece on the rear side of the core cylinder baffle, and the front spring mounting seat is fixedly fitted onto the water-passing core cylinder. The support spring is arranged between the two spring mounting seats, and the two ends of the support spring abut against the spring mounting seats on the adjacent sides respectively.

7. The self-resetting graded energy-dissipating pipe vibration damping joint according to claim 6, characterized in that, Both spring mounting seats have stepped surfaces at their opposite ends to abut against the support springs. The support springs are positioned between the two spring mounting seats, with both ends of the support springs respectively fitted onto the adjacent spring mounting seats and abutting against the corresponding stepped surfaces.

8. The self-resetting graded energy-dissipating pipe vibration damping joint according to claim 1, characterized in that, The water-passing core cylinder on the front side of the core cylinder baffle is provided with convex rings at intervals. When the water-passing core cylinder and the core cylinder baffle move forward to the preset initial position, the convex rings abut against the end of the front connecting piece.

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