A water-cooled wall weld cycle deformation cumulative fatigue early warning device and early warning method

Abstract

The application provides a water-cooled wall weld cycle deformation cumulative fatigue early warning device and early warning method. The device comprises a first mounting seat and a second mounting seat arranged on both sides of a water-cooled wall weld to be monitored. A floating actuating mechanism is connected between the first mounting seat and the second mounting seat. A bidirectional idle stroke screening mechanism is connected to the floating actuating mechanism. The bidirectional idle stroke screening mechanism is connected with a direction state latching mechanism, a bidirectional amplitude and turning point latching mechanism and a neutral zone transition confirmation mechanism. The direction state latching mechanism, the neutral zone transition confirmation mechanism and the bidirectional amplitude and turning point latching mechanism are connected with a cycle closed loop confirmation mechanism. A mechanical grade comparison mechanism is connected to the bidirectional amplitude and turning point latching mechanism. The mechanical grade comparison mechanism and the cycle closed loop confirmation mechanism are connected with a hierarchical accumulation mechanism. An irreversible accumulation mechanism is connected to the hierarchical accumulation mechanism. A threshold trigger mechanism is connected to the irreversible accumulation mechanism. A mechanical early warning retention mechanism is connected to the threshold trigger mechanism.

Description

Technical Field

[0001] This invention belongs to the field of mechanical monitoring technology for boiler heating surfaces, specifically to a water-cooled wall weld cyclic deformation cumulative fatigue early warning device and method. Background Technology

[0002] Water-cooled walls are typically formed by welding multiple water-cooled wall tubes and connecting fins. During boiler start-up and shutdown, load increases and decreases, and uneven heating in certain areas, the weld seams repeatedly undergo relative expansion and contraction or slip deformation. After long-term exposure to alternating loads, the weld seams and their heat-affected zones are prone to fatigue damage. Fatigue cracks often lack obvious external characteristics in their initiation stage. By the time the cracks have propagated to a point where they can be identified by conventional detection methods, the structural safety margin of the weld seam may have already decreased. Therefore, continuous monitoring and cumulative evaluation of the cyclic deformation process before weld crack initiation are necessary.

[0003] Currently, existing technologies acquire strain and displacement signals using MEMS strain or displacement sensors mounted on the structure. A processor compares these signals with reference values ​​and stores the load history or events exceeding the reference values ​​in an electronic database for assessing structural integrity and fatigue life. While this approach can record the structural strain or displacement history over a long period, it still relies on MEMS sensors, processors, memory, and power supplies. The high temperature, dust accumulation, and vibration environment near water-cooled walls presents challenges regarding the placement, protection, and long-term power supply of electronic components.

[0004] Furthermore, existing technologies primarily rely on electronic comparison and event recording based on strain or displacement measurements. They do not disclose the separate mechanical locking of positive and negative inflection points in the relative deformation of the weld, nor do they disclose recognizing two adjacent negative inflection states as a valid cycle only after confirming the first directional inflection, passing through the neutral zone, and forming a second directional inflection. They also lack a structure that selects different mechanical accumulation strokes based on the amplitude levels achieved in both directions and saves the accumulation results in an irreversible mechanical state.

[0005] Therefore, existing technologies are insufficient to filter out minute disturbances near the weld seam of water-cooled walls, identify sequentially formed turning states in opposite directions, and perform graded accumulation and early warning of effective cycles according to the cyclic deformation amplitude without the need for sensors, processors, and external power supplies. Summary of the Invention

[0006] To address the challenges of existing technologies in filtering out minute disturbances near water-cooled wall welds, identifying sequentially formed opposite-direction turning states, and accumulating and maintaining early warnings based on the cyclic deformation amplitude, without the need for sensors, processors, or external power supplies, this invention provides a water-cooled wall weld cyclic deformation accumulation fatigue early warning device and method.

[0007] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a water-cooled wall weld cyclic deformation cumulative fatigue early warning device, including a first mounting base and a second mounting base respectively disposed on both sides of the water-cooled wall weld to be monitored, a floating take-up mechanism connected between the first mounting base and the second mounting base, and a bidirectional empty stroke screening mechanism connected to the floating take-up mechanism. The bidirectional no-travel screening mechanism is connected to the directional state latching mechanism, the bidirectional amplitude and turning point latching mechanism, and the neutral zone transition confirmation mechanism, respectively. The directional state latching mechanism, the neutral zone transition confirmation mechanism, and the bidirectional amplitude and turning point latching mechanism are all connected to the cyclic closed-loop confirmation mechanism. A mechanical level comparison mechanism is connected to the bidirectional amplitude and turning point latching mechanism. Both the mechanical level comparison mechanism and the cyclic closed-loop confirmation mechanism are connected to a graded accumulation mechanism. An irreversible accumulation mechanism is connected to the graded accumulation mechanism. A threshold triggering mechanism is connected to the irreversible accumulation mechanism. A mechanical warning holding mechanism is connected to the threshold triggering mechanism.

[0008] Preferably, the floating pick-up mechanism includes a pick-up rod connected to a bidirectional idle stroke screening mechanism. One end of the pick-up rod is provided with a first ball joint, which is connected to a first mounting base. An axial guide sleeve is fitted onto the other end of the pick-up rod. A second ball joint is connected to the end of the axial guide sleeve away from the first ball joint. A lateral compensation slide is connected to the second ball joint. The lateral compensation slide is slidably installed in a lateral guide groove provided on a guide mounting plate. Both sides of the lateral compensation slide are provided with elastic centering members for resetting it. The guide mounting plate is installed on a second mounting base. The bidirectional idle travel screening mechanism includes an input slider connected to a take-off lever. A positive threshold block is provided on one side of the input slider, and a reverse threshold block is provided on the other side of the input slider. A neutral zone transition confirmation mechanism is provided between the reverse threshold block and the positive threshold block, and the neutral zone transition confirmation mechanism is located within the movement path of the input slider. A forward drive slider is installed between the input slider and the forward sill block. A forward free stroke is reserved between the forward drive slider and the input slider. The forward drive slider is provided with a through hole, and a take-up rod passes through the through hole. A reverse drive slider is installed between the input slider and the reverse threshold block; a reverse drive slider is reserved between the reverse drive slider and the input slider. Specifically, when the input slider passes the forward empty stroke, it pushes the forward transmission slider; when it passes the reverse empty stroke, it pushes the reverse transmission slider.

[0009] Preferably, the neutral zone transition confirmation mechanism includes a neutral zone lever, which is rotatably mounted inside the mechanism housing and located within the movement path of the input slider. The lower end of the neutral zone lever abuts against a bistable swing plate, and both sides of the bistable swing plate are provided with cross-center springs. The swing end of the bistable swing plate is correspondingly provided with a forward passage lock pin and a reverse passage lock pin. The forward passage lock pin and the reverse passage lock pin are respectively connected to the movement blocking paths of the forward confirmation passage lock pin and the reverse confirmation passage lock pin in the cyclic closed-loop confirmation mechanism, so that the closed-loop path permission state in the corresponding direction is switched after the input slider has completely passed through the neutral zone.

[0010] Preferably, the direction state latching mechanism includes a state transition disk, on which forward drive claws and reverse drive claws are symmetrically arranged. The input end of the forward drive claw corresponds to the movement path of the transmission slider, and the input end of the reverse drive claw corresponds to the movement path of the reverse transmission slider. The forward drive slider pushes the forward drive claw to rotate to turn the state transition disk, and the reverse drive slider pushes the reverse drive claw to rotate to turn the state transition disk.

[0011] Preferably, the bidirectional amplitude and inflection latch mechanism includes a positive amplitude and inflection latch mechanism and a negative amplitude and inflection latch mechanism; The positive amplitude and turning point latching mechanism includes a positive peak following slide sleeve, which abuts against a positive pushing shoulder provided on a positive transmission slider to drive the positive peak following slide sleeve to move. The positive peak following slide sleeve is provided with a positive one-way ratchet rack and a positive one-way holding pawl that cooperates with the positive one-way ratchet rack. A positive first-level trigger, a positive second-level trigger, and a positive third-level trigger are sequentially provided on the positive peak following slide sleeve in its moving direction. The reverse amplitude and turning latching mechanism includes a reverse peak following slide sleeve, which abuts against a reverse pushing shoulder provided on the reverse transmission slider to drive the reverse peak following slide sleeve to move; the reverse peak following slide sleeve is provided with a reverse one-way ratchet and a reverse one-way holding claw that cooperates with the reverse one-way ratchet. The reverse peak following sleeve is provided with a reverse primary trigger, a reverse secondary trigger, and a reverse tertiary trigger in sequence along its moving direction.

[0012] Preferably, the cyclic closed-loop confirmation mechanism is provided with a forward closed-loop push rod and a reverse closed-loop push rod; The forward closed-loop push rod is sequentially equipped with a reverse state permission baffle, a reverse first turning permission pin, a forward confirmation passage lock pin, and a reverse second turning permission pin. The moving path of the reverse closed-loop push rod is sequentially equipped with a forward state permission baffle, a forward first turning permission pin, a reverse confirmation passage lock pin, and a forward second turning permission pin. The forward state permission baffle and the reverse state permission baffle are respectively connected to the state transition disk; the forward confirmation access lock pin is connected to the forward access lock pin, and the reverse confirmation access lock pin is connected to the reverse access lock pin; the forward first turn permission pin is connected to the forward turn confirmation piece, and the reverse second turn permission pin is connected to the reverse turn confirmation piece. A closed-loop release rod is connected between the forward closed-loop push rod and the reverse closed-loop push rod, and the closed-loop release rod is connected to the graded accumulation mechanism.

[0013] Preferably, the mechanical grade comparison mechanism includes a comparison drive plate, on which a primary AND gate slide bar, a secondary AND gate slide bar, and a tertiary AND gate slide bar are connected; The first-level AND gate slide bar is connected to the positive first-level trigger unit and the negative first-level trigger unit respectively; the second-level AND gate slide bar is connected to the positive second-level trigger unit and the negative second-level trigger unit respectively; and the third-level AND gate slide bar is connected to the positive third-level trigger unit and the negative third-level trigger unit respectively. The output ends of the first-level AND gate slide, the second-level AND gate slide, and the third-level AND gate slide are respectively equipped with level output slides. Level holding lock pins are provided on the side of the level output slides. The level output slides are connected to the grade accumulation mechanism.

[0014] Preferably, the graded accumulation mechanism includes an energy storage slider and an accumulation rack; a drive spring is provided on one side of the energy storage slider, and a fixed energy storage stop is connected to the drive spring; The energy storage slider is connected to a stroke selection fork and an energy storage holding claw. The stroke selection fork is connected to the level output slide plate, and the energy storage holding claw is connected to the closed-loop release rod. The energy storage slider is connected to the accumulation rack, and the accumulation rack is meshed with an accumulation pinion. The accumulation pinion is connected to the irreversible accumulation mechanism. The irreversible accumulation mechanism includes an accumulation shaft with a retaining ratchet mounted on it. An anti-reverse pawl that meshes with the retaining ratchet is provided on the side of the ratchet. One end of the accumulation shaft is connected to an accumulation pinion, and the other end of the accumulation shaft is connected to a threshold triggering mechanism.

[0015] Preferably, the threshold triggering mechanism includes a spiral propulsion sleeve connected to the accumulation shaft, and a linear triggering slider is connected to the spiral propulsion sleeve; The linear trigger slider has a primary release lever and a secondary release lever set on its movement path; The mechanical warning and holding mechanism includes a primary warning sign and a secondary warning sign. The primary release lever is connected to the primary latch of the primary warning sign, and the secondary release lever is connected to the secondary latch of the secondary warning sign.

[0016] This invention provides a method for early warning of cyclic deformation accumulation fatigue in water-cooled wall welds, which utilizes the aforementioned device for early warning of cyclic deformation accumulation fatigue in water-cooled wall welds, comprising: The floating actuator is used to obtain the relative cyclic deformation of both sides of the water-cooled wall weld along the preset detection direction. The bidirectional idle stroke screening mechanism outputs the positive effective displacement or the reverse effective displacement after the relative cyclic deformation exceeds the fatigue calculation threshold in the corresponding direction. The direction state latching mechanism latches the direction that first forms an effective displacement as the first direction, and determines the direction that forms an effective displacement later, opposite to the first direction, as the second direction; The bidirectional amplitude and turning point latching mechanisms each unidirectionally store the extreme value position in the corresponding direction. The corresponding amplitude level is latched according to the preset extreme value position. After the effective displacement in the corresponding direction returns from the extreme value position to the preset return amount, the turning point confirmation state is latched. After the relative cyclic deformation has completely passed through the neutral region in the first direction, the neutral region transition confirmation mechanism opens a closed-loop confirmation path in the second direction. When the cyclic closed-loop confirmation mechanism is in the first direction's direction latching state and the turning confirmation state, the relative cyclic deformation has completely passed through the neutral region, and the second direction's turning confirmation state is established, it outputs a closed-loop release action. The mechanical grade comparison mechanism determines the highest amplitude grade that can be achieved in both directions based on the amplitude grades latched in the first and second directions respectively. The graded accumulation mechanism responds to the closed-loop release action, selects the corresponding mechanical accumulation stroke according to the determined highest amplitude level, converts the mechanical accumulation stroke into an irreversible accumulation amount, and after one accumulation is completed, clears the amplitude and turning state of the first direction, retains the amplitude and turning state of the second direction, and converts the second direction into the first direction of the next cycle. When the irreversible accumulation reaches the set threshold, the threshold triggering mechanism triggers the mechanical warning holding mechanism, which in turn triggers the visual warning sign.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects: This invention proposes a cyclic deformation cumulative fatigue early warning device for water-cooled wall welds. This device releases displacement interference in non-detection directions through a floating actuator, and, in conjunction with a bidirectional idle stroke screening mechanism, filters out minute disturbances that have not reached the threshold at the physical level, preventing invalid displacements from being mistakenly included in fatigue statistics. Then, a complete closed-loop discrimination logic is established using a direction state latching mechanism, a neutral zone transition confirmation mechanism, and a bidirectional amplitude and turning point latching mechanism. Only after both the first and second directions have completed turning point confirmation and the relative deformation has completely passed through the neutral zone, does the cyclic closed-loop confirmation mechanism output a valid closed-loop release action, ensuring precision. The system accurately identifies real cyclic deformation, eliminating the problem of repeated counting caused by jitter on the same side of the return stroke. Then, the mechanical level comparison mechanism objectively determines the highest amplitude level reached in both directions. The graded accumulation mechanism drives the corresponding mechanical stroke accordingly, realizing differentiated step-by-step accumulation with larger amplitude and more accumulation per stroke. The irreversible accumulation mechanism locks in permanent fatigue history records to ensure that the data is authentic and traceable. When the irreversible accumulation reaches the preset threshold, the threshold trigger mechanism triggers the mechanical warning holding mechanism to immediately pop up and lock the visual warning sign, maintaining the warning state for a long time without the need for external energy.

[0018] Furthermore, this device Furthermore, this device Attached Figure Description Figure 1 A schematic diagram of the overall structure of a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention. Figure 2 This is a schematic diagram of the mounting base in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention; Figure 3 This invention provides a schematic diagram of the floating actuator mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device. Figure 4 A schematic diagram of the bidirectional idle stroke screening mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention; Figure 5 A schematic diagram of the neutral zone transition confirmation mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention; Figure 6 A schematic diagram of the directional state locking mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention; Figure 7 A schematic diagram of the positive amplitude and turning point latching mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention; Figure 8A schematic diagram of the reverse amplitude and turning latching mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention; Figure 9 A schematic diagram of the mechanical grade comparison mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention; Figure 10 A schematic diagram of the four-condition cyclic closed-loop confirmation mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention. Figure 11 A schematic diagram of the fixed-stroke energy storage mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention; Figure 12 A schematic diagram of the rack-and-pinion graded accumulation mechanism in a water-cooled wall weld cyclic deformation accumulation fatigue early warning device provided by the present invention; Figure 13 A schematic diagram of the irreversible accumulation mechanism in a water-cooled wall weld cyclic deformation accumulation fatigue early warning device provided by the present invention; Figure 14 A schematic diagram of the graded endpoint buffer confirmation mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention; Figure 15 A schematic diagram of the state handover and reset mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention; Figure 16 This is a schematic diagram of the threshold triggering mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention; Figure 17 A schematic diagram of the mechanical early warning holding mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention; Figure 18 This is a schematic diagram of the manual total reset mechanism in a water-cooled wall weld cyclic deformation cumulative fatigue early warning device provided by the present invention.

[0019] In the attached diagram: 1. Floating take-off mechanism; 2. Bidirectional idle stroke screening mechanism; 3. Neutral zone transition confirmation mechanism; 4. Directional state latching mechanism; 5. Positive amplitude and turning point latching mechanism; 6. Reverse amplitude and turning point latching mechanism; 7. Mechanical grade comparison mechanism; 8. Four-condition cycle closed-loop confirmation mechanism; 9. Fixed stroke energy storage mechanism; 10. Structural rack and pinion graded accumulation mechanism; 11. Irreversible accumulation mechanism; 12. Graded end point buffer confirmation mechanism; 13. State handover reset mechanism; 14. Threshold triggering mechanism; 15. Mechanical early warning holding mechanism; 16. Manual total reset mechanism; 101. Adhesive base plate; 102. Thermal insulation support arm; 103. Detachable clamping component; 104. Clamp; 105. Pressure plate; 106. First ball joint. 107. Second ball joint; 108. Take-off rod; 109. Axial guide sleeve; 110. Lateral compensation slide; 111. Lateral guide groove; 112. Elastic centering element; 201. Input slider; 202. Forward sill stop; 203. Reverse sill stop; 204. Forward adjusting screw sleeve; 205. Reverse adjusting screw sleeve; 206. Forward transmission slider; 207. Reverse transmission slider; 209. Forward free stroke; 210. Reverse free stroke; 211. Neutral zone lever; 212. Bistable swing plate; 213. Centering spring; 214. Forward positioning groove; 215. Reverse positioning groove; 216. Forward travel lock pin; 217. Reverse travel lock pin; 301. State transition disk; 302. Forward drive claw; 3 03. Reverse drive claw; 304. Initial positioning slot; 305. Forward confirmation slot; 306. Reverse confirmation slot; 307. Status holding spring; 401. Forward peak following sleeve; 402. Forward one-way ratchet rack; 403. Forward one-way holding claw; 404. Forward first-stage trigger; 405. Forward second-stage trigger; 406. Forward third-stage trigger; 407. Forward first-stage latch; 408. Forward second-stage latch; 409. Forward third-stage latch; 410. Forward return shoulder; 411. Forward turning permission pin; 412. Forward turning confirmation piece; 421. Reverse peak following sleeve; 422. Reverse one-way ratchet rack; 423. Reverse one-way holding claw; 424. Reverse first-stage trigger; 425. Reverse 426. Reverse Triple ...515. Reverse first turning permission pin; 516. Forward second turning permission pin; 517. Reverse second turning permission pin; 518. Forward confirmation pass lock pin; 519. Reverse confirmation pass lock pin; 520. Closed-loop release lever; 521. Closed-loop release lock pin; 522. Single release check pawl; 601. Energy storage slider; 602. Fixed energy storage stop block; 603. Drive spring; 604. Energy storage holding pawl; 605. Forward input pressing ramp; 606. Reverse input pressing ramp; 607. Accumulating rack; 608. Rack guide rail; 6 09. Drive connection slot; 610. Accumulating pinion; 611. One-way clutch; 612. Rack return spring; 701. Accumulating shaft; 702. Holding ratchet; 703. Anti-reverse pawl; 704. Accumulating zero mark; 705. First-stage end-point holding slot; 706. Second-stage end-point holding slot; 707. Third-stage end-point holding slot; 708. Deceleration ramp; 709. End-point buffer spring; 710. End-point trigger ramp; 711. End-point trigger lever; 712. End-point confirmation swing arm; 713. End-point holding pin; 714. Transfer start lever; 801. Handover camshaft; 802. AND gate return cam; 803. AND gate return confirmation pin; 804. Previous direction selection reset cam; 805. Current direction protection baffle; 806. State transition fork; 807. Level slide reset cam; 808. Previous direction slide release cam; 809. Limit pin load release cam; 810. Limit pin reset rod; 811. Rack reset rod; 812. Energy storage reset rod; 813. Release rod reset component; 814. Screw propulsion sleeve; 815. Linear trigger slider; 816. First-level threshold stop. 817. Secondary threshold retaining ring; 818. Primary trip lever; 819. Secondary trip lever; 820. Threshold adjustment ring; 901. Primary warning indicator; 902. Secondary warning indicator; 903. Primary energy storage spring; 904. Secondary energy storage spring; 905. Primary latch; 906. Secondary latch; 907. Primary holding ratchet; 908. Secondary holding ratchet; 909. Observation cover; 910. Reset shaft; 911. Main reset cam; 912. Pawl release component; 913. Zeroing gear set; 914. Anti-misoperation cap. Detailed Implementation

[0020] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] This invention provides a fatigue early warning device for cyclic deformation accumulation of water-cooled wall welds, such as... Figure 1 As shown, it includes a first mounting base and a second mounting base respectively disposed on both sides of the weld of the water-cooled wall to be monitored. A floating actuator 1 is connected between the first mounting base and the second mounting base. The floating actuator 1 is connected to a bidirectional idle stroke screening mechanism 2. The bidirectional idle stroke screening mechanism 2 is connected to a direction state latching mechanism 4, a bidirectional amplitude and transition latching mechanism, and a neutral zone transition confirmation mechanism 3. The direction state latching mechanism 4, the neutral zone transition confirmation mechanism 3, and the bidirectional amplitude and transition latching mechanism are all connected to a cyclic closed-loop confirmation mechanism 8. A mechanical level comparison mechanism 7 is connected to the bidirectional amplitude and transition latching mechanism. The mechanical level comparison mechanism 7 and the cyclic closed-loop confirmation mechanism 8 are both connected to a graded accumulation mechanism 10. An irreversible accumulation mechanism 11 is connected to the graded accumulation mechanism 10. A threshold triggering mechanism 14 is connected to the irreversible accumulation mechanism 11. A mechanical early warning holding mechanism 15 is connected to the threshold triggering mechanism 14.

[0023] In this embodiment, as Figure 1 and Figure 2 As shown, the first mounting base and the second mounting base are respectively fixed to the water-cooled wall tube or fin area on both sides of the weld. Both include a base plate 101, a heat-insulating support arm 102, and a detachable clamping component 103. The base plate 101 is attached to the outer wall of the water-cooled wall tube or the surface of the fins. The heat-insulating support arm 102 extends from the base plate 101 away from the surface of the water-cooled wall and is fixed to the base plate 101, so that the latching, comparison, accumulation, and warning components are kept at a distance from the high-temperature surface of the water-cooled wall. The detachable clamping component 103 adopts a structure in which a clamp 104 and a pressure plate 105 cooperate. The clamp 104 is wrapped around the outer circumference of the water-cooled wall tube, and both ends of the clamp 104 are detachably connected to the pressure plate 105. The pressure plate 105 presses the base plate 101 tightly against the outer wall of the water-cooled wall tube to avoid drilling holes in the water-cooled wall tube and to reduce the impact of the device on the stress state of the weld body. The first and second mounting seats are located within the local strain-affected areas on both sides of the weld, and the distances from the two mounting seats to the corresponding weld toes are within a preset allowable range. The line connecting the first and second mounting seats forms a preset detection axis, which is consistent with the main opening and closing deformation direction or the main displacement deformation direction of the weld to be monitored. Before installation, the mounting seat positions and the preset detection axis are determined through cyclic deformation tests or structural analysis of weld samples with the same structure, so that the axial relative displacement between the two mounting seats mainly reflects the local cyclic deformation of the weld and its heat-affected zone.

[0024] In this embodiment, as Figure 1 and Figure 3As shown, the floating actuator 1 includes an actuator rod 108, which is connected to the bidirectional idle stroke screening mechanism 2. One end of the actuator rod 108 is provided with a first ball joint 106, which is connected to a first mounting base. The other end of the actuator rod 108 is fitted with an axial guide sleeve 109. A second ball joint 107 is connected to the end of the axial guide sleeve 109 away from the first ball joint 106. A lateral compensation slide 110 is connected to the second ball joint 107. The lateral compensation slide 110 is slidably mounted in a lateral guide groove 111 provided on a guide mounting plate. Both sides of the lateral compensation slide 110 are provided with elastic centering members 112 for resetting it. The guide mounting plate is mounted on a second mounting base. The first ball joint 106 and the second ball joint 107 are used to release the relative angle between the first mounting base and the second mounting base. The lateral compensation slide 110 is used to release the lateral displacement perpendicular to the preset detection axis. An adjustable reference sleeve is provided on the take-up rod 108, and a zero-position mark is provided on the second mounting base. The zero-position mark is a scribed line mark. By adjusting the threaded connection length between the take-up rod 108 and the first ball joint 106, the adjustable reference sleeve is aligned with the zero-position mark when the water-cooled wall is in the reference state, and this position is determined as the initial neutral position 208. The adjustable reference sleeve is fixed by a lock nut. The maximum axial reaction force generated by the take-up rod 108 and its floating connection structure is lower than the preset proportion of the normal deformation load in the device installation area, so as to avoid the device forming significant additional constraints on the weld.

[0025] In this embodiment, as Figure 1 and Figure 4As shown, the bidirectional idle travel screening mechanism 2 includes an input slider 201 connected to the take-up lever 108. A forward sill block 202 is provided on one side of the input slider 201, and a reverse sill block 203 is provided on the other side. A neutral zone transition confirmation mechanism 3 is provided between the reverse sill block 203 and the forward sill block 202, and the neutral zone transition confirmation mechanism 3 is located within the movement path of the input slider 201. A forward drive slider 206 is installed between the input slider 201 and the forward sill block 202, with a forward idle travel 209 reserved between the forward drive slider 206 and the input slider 201. The forward drive slider 206 has a through hole through which the take-up lever 108 passes. A reverse drive slider 207 is installed between the input slider 201 and the reverse sill block 203, with a reverse idle travel 210 reserved between the reverse drive slider 207 and the input slider 201. When the input slider 201 is in the initial neutral position 208, its two axial end faces are spaced apart from the forward drive slider 206 and the reverse drive slider 207, respectively, to form a forward idle stroke 209 and a reverse idle stroke 210. Forward sill stop 202 and reverse sill stop 203 are respectively provided with a forward adjusting screw sleeve 204 and a reverse adjusting screw sleeve 205 to adjust the size of the corresponding idle stroke. When the displacement of the input slider 201 does not exceed the corresponding idle stroke, the directional state latching mechanism 4, the bidirectional amplitude and turning latching mechanism, and the fixed stroke energy storage mechanism 9 are not driven. Specifically, when the input slider 201 passes the forward idle stroke 209, it pushes the forward drive slider 206; when it passes the reverse idle stroke 210, it pushes the reverse drive slider 207. Both the forward transmission slider 206 and the reverse transmission slider 207 are equipped with overload compression springs and maximum stroke blocks. The overload compression springs are respectively set between the corresponding transmission sliders and the corresponding threshold blocks. The maximum stroke blocks are fixed to the corresponding ends of the mechanism housing or linear guide rails to absorb the impact of abnormally large displacements and limit the maximum stroke of subsequent mechanisms.

[0026] In this embodiment, as Figure 11As shown, the fixed-stroke energy storage mechanism 9 includes an energy storage slider 601, a fixed energy storage stop 602, a drive spring 603, an energy storage holding claw 604, a forward input pressing inclined surface 605, and a reverse input pressing inclined surface 606. An energy storage linear guide groove is provided on the energy storage mounting frame. The energy storage slider 601 is slidably disposed within the energy storage linear guide groove and can reciprocate between the energy storage position, the fixed energy storage position, and the release endpoint position. The movement direction of the energy storage slider 601 is parallel to the movement direction of the accumulating rack 607. The sidewall of the energy storage linear guide groove circumferentially limits the movement of the energy storage slider 601, ensuring that the energy storage slider 601 can only move along the energy storage direction and the release direction. A fixed energy storage block 602 is fixed to one end of the energy storage mounting frame along the energy storage direction and is positioned opposite to the energy storage slider 601. A spring positioning part is provided on the side of the fixed energy storage block 602 facing the energy storage slider 601, and a movable spring seat is provided on the end of the energy storage slider 601 facing the fixed energy storage block 602. A drive spring 603 is positioned between the fixed energy storage block 602 and the energy storage slider 601, with one end abutting against the spring positioning part of the fixed energy storage block 602 and the other end abutting against the movable spring seat of the energy storage slider 601. A forward input pressing slope 605 is provided on the side of the energy storage slider 601 facing the forward drive slider 206, and a reverse input pressing slope 606 is provided on the side of the energy storage slider 601 facing the reverse drive slider 207. The forward drive slider 206 and the reverse drive slider 207 are respectively provided with pressing ends that cooperate with the forward input pressing slope 605 and the reverse input pressing slope 606. When the energy storage slider 601 is in the energy storage permitting state, after either the forward drive slider 206 or the reverse drive slider 207 has passed its idle stroke and reached an effective displacement, its corresponding pressing end abuts against and pushes the corresponding input pressing slope, causing the energy storage slider 601 to move towards the fixed energy storage stop 602, compressing the drive spring 603 to the fixed energy storage position. The energy storage holding claw 604 is rotatably mounted on the energy storage mounting bracket via a rotating shaft. Under the action of the elastic element, the claw end of the energy storage holding claw 604 engages in the holding groove opened on the side of the energy storage slider 601, locking the energy storage slider 601 in the fixed energy storage position after compressing the drive spring 603. When the energy storage holding claw 604 enters the holding groove of the energy storage slider 601, the energy storage slider 601 disengages from the forward input pressing slope 605 and the reverse input pressing slope 606, and the subsequent movement of the drive slider will no longer repeatedly compress the drive spring 603. The release end of the energy storage holding claw 604 is connected to the closed-loop release rod 520 in the closed-loop confirmation mechanism 8. When the closed-loop release rod 520 outputs a closed-loop release action, it pushes the release end of the energy storage holding claw 604, causing it to rotate around the pivot. The claw end disengages from the holding groove of the energy storage slider 601, releasing the limit on the energy storage slider 601. Under the action of the drive spring 603, the energy storage slider 601 releases the driving energy, pushing the accumulation rack 607 to move along the accumulation direction. The drive spring 603 only provides a fixed release driving force and does not perform the function of indicating the amplitude.

[0027] The energy storage re-licensing mechanism includes an energy storage prohibition pin, a neutral zone re-licensing lever, a re-licensing holding slot, and an energy storage input gate. The energy storage prohibition pin is slidably disposed within the guide hole of the energy storage mounting bracket, with one end corresponding to a prohibition slot on the side of the energy storage slider 601. After a state handover reset is completed, the energy storage reset rod 812 drives the energy storage slider 601 back to the energy storage position. Simultaneously, the energy storage prohibition pin, under the action of its elastic element, extends into the prohibition slot of the energy storage slider 601, locking the energy storage slider 601 in the energy storage position. This prevents it from being pushed back into the current direction by the transmission slider, which is still within the effective area, thus avoiding repeated energy storage due to residual displacement in the current direction. The neutral zone re-licensing lever is disposed on the movement path of the input slider 201 returning to the initial neutral region and is correspondingly connected to the energy storage prohibition pin. After completing one closed loop, when the input slider 201 continues its return journey from the current effective region and enters the neutral region, it pushes the neutral region lever 211. The neutral region lever 211 further pushes the neutral region re-permission lever, which overcomes the elastic force of the energy storage prohibition pin, lifting it out of the prohibition slot of the energy storage slider 601. The re-permission holding slot then holds the energy storage prohibition pin in the released position. After the energy storage prohibition pin is released, the energy storage input gate opens the transmission path between the newly formed opposite-direction transmission slider and the energy storage slider 601, allowing the next effective displacement to drive the energy storage slider 601 for energy storage. In the initial state of the device, the energy storage prohibition pin is in the released position, and any first effective half-cycle can complete the first energy storage. After each energy storage is completed, the energy storage input gate closes until the current closed loop is completed and the device passes through the neutral region again, at which point it reopens.

[0028] The level stroke selection mechanism includes a level output slide plate 508, a stroke selection fork, and a movable limit pin. The stroke selection fork is mounted on the fork shaft of the fixed frame. The input end of the stroke selection fork is connected to the level output slide plate 508 in the mechanical level comparison mechanism 7, and the output end of the stroke selection fork is connected to the movable limit pin. The movable limit pin is installed in the transverse slide groove of the fixed frame and can move in a direction perpendicular to the movement direction of the accumulator rack 607. The side of the accumulator rack 607 is provided with a first-level stop surface, a second-level stop surface, and a third-level stop surface staggered along its movement direction. The three stop surfaces correspond to the effective stroke endpoints of the first, second, and third levels, respectively. When the grade output slide plate 508 is locked in the first-level position by the grade holding locking pin 509, the stroke selection fork drives the movable limit pin to move laterally to align with the first-level stop surface. When the grade output slide plate 508 is in the second-level position, the stroke selection fork drives the movable limit pin to align with the second-level stop surface. When the grade output slide plate 508 is in the third-level position, the stroke selection fork drives the movable limit pin to align with the third-level stop surface. The independent load-bearing limit mechanism includes a first-level positioning groove, a second-level positioning groove, and a third-level positioning groove set on the movable limit pin, a load-bearing locking block, a load-bearing spring, and a locking block release rod set on the fixed frame. After the stroke selection fork moves the movable limit pin to the first, second, or third-level position, the corresponding positioning groove aligns with the load-bearing locking block. Under the action of the load-bearing spring, the load-bearing locking block enters the positioning groove, directly transmitting the load of the movable limit pin along the rack movement direction to the fixed frame. The stroke selection fork and level output slide 508 are only responsible for selecting the lateral position of the limit pin and do not bear the axial load generated when the accumulating rack 607 impacts the stop surface. After the closed-loop accumulation is completed and the state handover reset stage is entered, the lock block release lever first overcomes the force of the load-bearing spring, causing the load-bearing lock block to exit the positioning groove of the limit pin. Only then can the limit pin reset lever 810 return the movable limit pin to the selected position. When the load-bearing lock block has not exited, the stroke selection fork cannot forcibly drive the limit pin to move.

[0029] In this embodiment, as Figure 1 and Figure 5As shown, the neutral zone transition confirmation mechanism 3 includes a neutral zone lever 211, which is rotatably mounted inside the mechanism housing and located within the movement path of the input slider 201. The lower end of the neutral zone lever 211 abuts against a bistable swing plate 212, and both sides of the bistable swing plate 212 are provided with cross-center springs 213. The swing end of the bistable swing plate 212 is provided with a forward passage lock pin 216 and a reverse passage lock pin 217. The forward passage lock pin 216 and the reverse passage lock pin 217 are respectively connected to the movement blocking paths of the forward confirmation passage lock pin 518 and the reverse confirmation passage lock pin 519 in the closed-loop confirmation mechanism 8, so as to switch the closed-loop path permission state in the corresponding direction after the input slider 201 has completely passed through the neutral zone. Specifically, the housing of the mechanism has a swing plate mounting seat between the forward sill block 202 and the reverse sill block 203. The swing plate mounting seat has two opposing rotating shaft supports, with the two ends of the central rotating shaft mounted on the two supports respectively. The axis of the central rotating shaft is perpendicular to the preset detection axis. The middle part of the bistable swing plate 212 is rotatably sleeved on the central rotating shaft and can swing between the forward and reverse permitted positions around the central rotating shaft. One end of the centering spring 213 is fixed to the swing plate mounting seat, and the other end abuts against the lower side of the bistable swing plate 212, allowing the bistable swing plate 212 to selectively remain in the forward or reverse permitted position after passing the center dead point. The forward pass locking pin 216 and the reverse pass locking pin 217 are movably disposed in the locking pin guide holes on both sides of the swing plate mounting seat, and are located below the two swinging ends of the bistable swing plate 212 respectively. The upper end of the forward-moving locking pin 216 corresponds to the forward-swinging end of the bistable pendulum 212, and the upper end of the reverse-moving locking pin 217 corresponds to the reverse-swinging end of the bistable pendulum 212; the lower ends of the two locking pins extend into the forward closed-loop transmission path and the reverse closed-loop transmission path, respectively. When the bistable pendulum 212 swings, it selectively pushes one locking pin into the corresponding closed-loop transmission path and releases the other locking pin out of the corresponding closed-loop transmission path. The upper end of the neutral zone lever 211 is rotatably mounted on the mechanism housing via a lever shaft. The input slider 201 is provided with a toggle protrusion. The middle part of the neutral zone lever 211 is located within the movement path of the toggle protrusion, and the lower end of the neutral zone lever 211 forms a toggle end and abuts against the upper side of the bistable pendulum 212. When the input slider 201 moves from the positive or negative valid region in the opposite direction and passes through the initial neutral position 208, the actuating convex part pushes the neutral zone lever 211 to swing around the lever axis. The actuating end of the neutral zone lever 211 pushes the bistable pendulum 212 past the center dead point and switches to the permitted position in the opposite direction. The small jitter of the input slider 201 near the initial neutral position 208 is insufficient to make the bistable pendulum 212 pass through the center dead point. Therefore, the vibration on the same side that does not completely pass through the neutral region cannot form a direction change permission. The direction permission of the bistable pendulum 212 cannot trigger the closed loop alone. It must be coordinated in series with the direction state latching mechanism 4 and the two-direction turning confirmation state.

[0030] In this embodiment, as Figure 1 and Figure 6 As shown, the directional state latching mechanism 4 includes a state transition disk 301. A forward drive claw 302 and a reverse drive claw 303 are symmetrically arranged on the sides of the state transition disk 301. The input end of the forward drive claw 302 corresponds to the movement path of the forward transmission slider 206, and the input end of the reverse drive claw 303 corresponds to the movement path of the reverse transmission slider 207. The forward transmission slider 206 pushes the forward drive claw 302 to rotate, thereby actuating the state transition disk 301, and the reverse transmission slider 207 pushes the reverse drive claw 303 to rotate, thereby actuating the state transition disk 301. Specifically, the directional state latching mechanism 4 is mounted on a state mounting plate on the mechanism housing. The state mounting plate is located between the two transmission paths corresponding to the forward transmission slider 206 and the reverse transmission slider 207. A state shaft is fixedly mounted on the state mounting plate. The axis of the state shaft is perpendicular to the state mounting plate and perpendicular to a preset detection axis. The state transition disk 301 is rotatably mounted on the state axis, allowing it to rotate around the state axis between the initial state position, the positive confirmation position, and the reverse confirmation position. The state transition disk 301 is provided with an initial positioning groove 304, a positive confirmation groove 305, and a reverse confirmation groove 306. A state holding spring 307 is used to maintain the state transition disk 301 in the switching state between the three positions. The input end of the positive drive pawl 302 is located at the output end of the positive transmission slider 206 or within the movement path of the drive pin on the positive transmission slider 206, and the pawl tip of the positive drive pawl 302 engages with the positive side outer edge of the state transition disk 301. The input end of the reverse drive pawl 303 is located at the output end of the reverse transmission slider 207 or within the movement path of the drive pin on the reverse transmission slider 207, and the pawl tip of the reverse drive pawl 303 engages with the reverse side outer edge of the state transition disk 301. When the forward drive slider 206 generates a positive effective displacement, it pushes the forward drive claw 302 to rotate, which in turn moves the state transition disk 301 into the positive pending confirmation position. When the reverse drive slider 207 generates a reverse effective displacement, it pushes the reverse drive claw 303 to rotate, which in turn moves the state transition disk 301 into the reverse pending confirmation position. When the device is in its initial state and a positive effective displacement is formed first, the forward drive slider 206, through the forward drive claw 302, moves the state transition disk 301 into the positive pending confirmation position; when a reverse effective displacement is formed first, the reverse drive claw 303 moves the state transition disk 301 into the reverse pending confirmation position. When the state transition disk 301 is in the positive pending confirmation position, any further positive displacement in the same direction only updates the positive extreme value state; when the state transition disk 301 is in the reverse pending confirmation position, any further reverse displacement in the same direction only updates the reverse extreme value state.

[0031] In this embodiment, as Figure 1 and Figure 7As shown, the bidirectional amplitude and inflection latching mechanism includes a positive amplitude and inflection latching mechanism 5 and a reverse amplitude and inflection latching mechanism 6. The positive amplitude and inflection latching mechanism 5 includes a positive peak following sleeve 401, which abuts against a positive pushing shoulder provided on the positive transmission slider 206 to drive the positive peak following sleeve 401 to move. The positive peak following sleeve 401 is provided with a positive one-way ratchet rack 402 and a positive one-way holding claw 403 that cooperates with the positive one-way ratchet rack 402. A positive first-level trigger 404, a positive second-level trigger 405, and a positive third-level trigger 406 are sequentially provided on the positive peak following sleeve 401 in its moving direction. A positive guide rod is fixedly provided on the side of the positive transmission slider 206 facing the positive latching mounting plate, and the positive guide rod extends along a preset detection axis. A positive peak following sleeve 401 is slidably fitted onto a positive guide rod. A sleeve return spring is provided between the positive peak following sleeve 401 and the positive guide rod, and a sleeve return stop is provided on the positive locking mounting plate. A positive pushing shoulder is provided on the positive transmission slider 206, located on the rear side of the positive peak following sleeve 401 along the positive amplitude deepening direction. When the positive transmission slider 206 generates a positive effective displacement, the positive pushing shoulder abuts against and pushes the positive peak following sleeve 401 to move along the positive amplitude deepening direction; when the positive transmission slider 206 returns, the positive pushing shoulder separates from the positive peak following sleeve 401. A positive one-way ratchet rack 402 is fixedly installed on the outside of the positive peak following sleeve 401 along the moving direction of the positive peak following sleeve 401. A forward unidirectional holding pawl 403 is mounted on a forward latching mounting plate via a holding pawl pivot and is pressed against a forward unidirectional ratchet 402 by a holding pawl elastic element. The pawl tip of the forward unidirectional holding pawl 403 engages with the forward unidirectional ratchet 402, allowing the forward peak value to move tooth by tooth along the forward amplitude deepening direction following the sliding sleeve 401, and preventing the forward peak value from moving along the return direction following the sliding sleeve 401, thereby saving the reached forward peak value position. When the forward peak value moves to the first-level forward amplitude position following the sliding sleeve 401, the first-level forward trigger 404 pushes the first-level forward latch plate 407 into the latching position; when the second-level forward amplitude position is reached, the second-level forward latch plate 408 enters the latching position; when the third-level forward amplitude position is reached, the third-level forward latch plate 409 enters the latching position. Both the forward amplitude level and the forward peak value position are generated by the same kinematic chain of the forward peak value following the sliding sleeve 401. When the forward drive slider 206 begins its reverse return stroke from the positive extreme position, the positive peak follower sleeve 401 is held at the deepest position reached by the positive unidirectional holding claw 403. After the forward drive slider 206 returns to the positive return gap relative to the positive peak follower sleeve 401, the positive return shoulder 410 pushes the positive turning confirmation piece 412 into the turning holding position, and causes the positive turning permission pin 411 to exit the corresponding closed-loop blocking path, indicating that the positive turning point has been formed.If the forward drive slider 206 moves forward again before passing through the neutral zone and exceeds the original positive extreme value, the forward push shoulder can overcome the ratchet ramp resistance of the forward unidirectional holding claw 403, continue to push the positive peak along the amplitude deepening direction of the sliding sleeve 401, and trigger a higher-level positive latching plate. After the positive peak is updated to a new deeper position with the sliding sleeve 401, the forward drive slider 206 returns to the positive return gap, and the positive turning confirmation plate 412 overwrites and updates the positive turning position. The updated positive peak position and amplitude level replace the original positive turning state, and the original turning state will no longer participate in the next common amplitude level comparison.

[0032] In this embodiment, as Figure 1 and Figure 8 As shown, the reverse amplitude and turning latch mechanism 6 includes a reverse peak following sleeve 421, which abuts against a reverse pushing shoulder provided on the reverse transmission slider 207 to drive the reverse peak following sleeve 421 to move; the reverse peak following sleeve 421 is provided with a reverse one-way ratchet 422 and a reverse one-way holding pawl 423 that cooperates with the reverse one-way ratchet 422; the reverse peak following sleeve 421 is provided with a reverse first-level trigger part 424, a reverse second-level trigger part 425 and a reverse third-level trigger part 426 in sequence along its moving direction. The reverse amplitude and turning latch mechanism 6 is a mirror image of the positive amplitude and turning latch mechanism 5, and its internal action relationship corresponds to that of the positive amplitude and turning latch mechanism 5. When the reverse peak moves with the sliding sleeve 421 to the reverse first-level amplitude position, the reverse first-level trigger 424 pushes the reverse first-level latch plate 427 into the latch position; when the reverse second-level amplitude position is reached, the reverse second-level latch plate 428 enters the latch position; when the reverse third-level amplitude position is reached, the reverse third-level latch plate 429 enters the latch position. After the reverse transmission slider 207 returns from the reverse extreme position and reaches the reverse return gap, the reverse return shoulder 430 pushes the reverse turning confirmation plate 432 into the turning holding position, and causes the reverse turning permission pin 431 to exit the corresponding closed-loop blocking path. The forward return gap and the reverse return gap are used to eliminate local high-frequency jitter near the corresponding extreme value. Their values ​​are greater than the maximum amplitude of the non-target jitter and less than the preset ratio of the distance between the corresponding first-level effective amplitude threshold and the initial neutral position 208. The return gap is only used as an extreme value rotation confirmation condition and is not used as a new fatigue amplitude calculation threshold.

[0033] In this embodiment, as Figure 1 and Figure 10As shown, the closed-loop confirmation mechanism 8 is equipped with a forward closed-loop push rod 510 and a reverse closed-loop push rod 511. The forward closed-loop push rod 510 has a reverse state permission baffle 513, a reverse first turning permission pin 515, a forward confirmation access lock pin 518, and a reverse second turning permission pin 517 arranged sequentially along its movement path. The reverse closed-loop push rod 511 has a forward state permission baffle 512, a forward first turning permission pin 514, a reverse confirmation access lock pin 519, and a forward second turning permission pin 516 arranged sequentially along its movement path. The forward state permission baffle 512 and the reverse state permission baffle 513 are respectively connected to the state transition disk 301, and their entry or exit from the movement blocking path of the corresponding closed-loop push rod is controlled by the rotation position of the state transition disk 301. The forward confirmation access lock pin 518 is connected to the forward access lock pin 216, and the reverse confirmation access lock pin 519 is connected to the reverse access lock pin 217. The system controls the corresponding passage lock pin to exit the blocking position when the relative cyclic deformation completely passes through the neutral region; the positive first turning permission pin 514 is connected to the positive turning confirmation piece 412, and the reverse second turning permission pin 517 is connected to the reverse turning confirmation piece 432, so as to control the permission pin to exit the blocking position after the corresponding directional turning confirmation; a closed-loop release rod 520 is connected between the positive closed-loop push rod 510 and the reverse closed-loop push rod 511, and the closed-loop release rod 520 is connected to the energy storage holding claw 604 of the graded accumulation mechanism 10, so as to output a closed-loop release action when the four conditions corresponding to the directional state latching mechanism 4, the neutral region transition confirmation mechanism 3 and the bidirectional amplitude and turning latching mechanism (i.e., the first direction pending confirmation state, the first direction turning confirmation state, the neutral region crossing state and the second direction turning confirmation state) are simultaneously satisfied, so as to release the limit of the energy storage holding claw 604 and drive the graded accumulation mechanism 10. When the closed-loop push rod pushes the closed-loop release rod 520, the closed-loop release rod 520 first drives the comparison drive plate 504 to complete the common amplitude level comparison, then locks the level output slide plate 508 with the level holding lock pin 509, and then releases the closed-loop release lock pin 521. The single-release check pawl 522 enters the check groove after the closed-loop release rod 520 completes one release stroke, preventing the closed-loop release rod 520 from repeating its action before the current accumulation and state handover is completed.

[0034] In this embodiment, as Figure 1 and Figure 9As shown, the mechanical grade comparison mechanism 7 includes a comparison drive plate 504, on which a primary AND gate slide bar 501, a secondary AND gate slide bar 502, and a tertiary AND gate slide bar 503 are connected. The movement path of the primary AND gate slide bar 501 is correspondingly provided with a blocking end controlled by the positive primary latch plate 407 in the positive amplitude and deflection latching mechanism 5 and the reverse primary latch plate 427 in the reverse amplitude and deflection latching mechanism 6; the movement path of the secondary AND gate slide bar 502 is correspondingly provided with a blocking end controlled by the positive secondary latch plate 408 in the positive amplitude and deflection latching mechanism 5 and the reverse secondary latch plate 428 in the reverse amplitude and deflection latching mechanism 6; the movement path of the tertiary AND gate slide bar 503 is correspondingly provided with a blocking end controlled by the positive tertiary latch plate 409 in the positive amplitude and deflection latching mechanism 5 and the reverse tertiary latch plate 429 in the reverse amplitude and deflection latching mechanism 6. When both the forward and reverse latches of the corresponding level are in the latched position, the AND gate slider of the corresponding level can enter the effective position and push the level output slide 508 to move to the corresponding level position. If any latch of the corresponding level is not in the latched position, the blocking end of the latch extends into the moving path of the corresponding AND gate slider, causing the AND gate slider to stop moving and compressing the corresponding relief spring. The output ends of the first-level AND gate slider 501, the second-level AND gate slider 502, and the third-level AND gate slider 503 are respectively provided with level output slides 508. A level holding lock pin 509 is provided on the side of the level output slide 508. The level output slide 508 is connected to the grade accumulation mechanism 10. Specifically, the comparator drive plate 504 is connected to the first-stage AND gate slide bar 501, the second-stage AND gate slide bar 502, and the third-stage AND gate slide bar 503 respectively via a first-stage relief spring 505, a second-stage relief spring 506, and a third-stage relief spring 507. Each AND gate slide bar is connected to the comparator drive plate 504 via a corresponding relief spring. Each AND gate slide bar has a forward blocking shoulder and a reverse blocking shoulder on its movement path. When the corresponding level of forward latching plate is not in the latching position, its blocking end extends into the movement path of the corresponding AND gate slide bar; when the corresponding level of reverse latching plate is not in the latching position, its blocking end also extends into the movement path of the corresponding AND gate slide bar. Only after both the forward and reverse latching plates of the corresponding level are in the latching position can the corresponding AND gate slide bar enter the valid position. When the comparator drive plate 504 executes the comparison stroke, the unblocked AND gate slide bars enter the valid position along with the comparator drive plate 504; the blocked AND gate slide bars stop moving and compress the corresponding relief spring. The obstruction of any high-level AND gate slide bar does not affect the comparator drive plate 504 and the low-level AND gate slide bar from continuing to complete the comparison stroke. The first-level AND gate slide bar 501, the second-level AND gate slide bar 502, and the third-level AND gate slide bar 503 are respectively equipped with a first-level output boss, a second-level output boss, and a third-level output boss. The three output bosses are staggered along the width direction of the level output slide plate 508 and correspond to the first-level stepped push surface, the second-level stepped push surface, and the third-level stepped push surface on the level output slide plate 508, respectively.When the first-level output boss pushes the first-level stepped push surface, the level output slide 508 enters the first-level position; when the second-level output boss pushes the second-level stepped push surface, the level output slide 508 passes the first-level position and enters the second-level position; when the third-level output boss pushes the third-level stepped push surface, the level output slide 508 passes both the first-level and second-level positions and enters the third-level position. The three stepped push surfaces are staggered in the width direction, so that the lower-level bosses do not obstruct the continued advancement of the higher-level bosses.

[0035] In this embodiment, as Figure 1 and Figure 12As shown, the graded accumulation mechanism 10 includes an energy storage slider 601 and an accumulation rack 607. A drive spring 603 is provided on one side of the energy storage slider 601. One end of the drive spring 603 abuts against a fixed energy storage stop 602, and the other end abuts against a movable spring seat of the energy storage slider 601. A stroke selection fork and an energy storage holding claw 604 are connected to the energy storage slider 601. The stroke selection fork is connected to the grade output slide plate 508 to control the movable limit pin to enter the accumulation stage according to the highest amplitude level locked by the grade output slide plate 508. The movement path of the corresponding stop surface of the accumulation rack 607; the energy storage holding claw 604 is connected to the closed-loop release rod 520 so that the closed-loop release rod 520 releases the energy storage holding claw 604 from limiting the energy storage slider 601, thereby releasing the energy storage slider 601 to drive the accumulation rack 607 to move; the energy storage slider 601 is connected to the accumulation rack 607 through the drive connecting groove 609, and the accumulation rack 607 is meshed with an accumulation pinion 610, which is connected to the irreversible accumulation mechanism 11 through a one-way clutch 611. When the energy storage slider 601 is in the energy storage permission state, after either the forward drive slider 206 or the reverse drive slider 207 reaches an effective displacement, it can push the energy storage slider 601 to the fixed energy storage position and compress the drive spring 603 through the corresponding input pressing inclined surface. After the energy storage holding claw 604 enters the holding groove of the energy storage slider 601, the energy storage slider 601 disengages from the forward input pressing inclined surface 605 and the reverse input pressing inclined surface 606. The subsequent transmission slider continues to move without repeatedly compressing the drive spring 603. The drive spring 603 only provides a fixed release driving force and does not function as an amplitude indicator. An energy storage linear guide groove is provided on the energy storage mounting bracket. The energy storage slider 601 is slidably positioned within the energy storage linear guide groove and can reciprocate between the energy storage position, the fixed energy storage position, and the release endpoint position. The movement direction of the energy storage slider 601 is parallel to the movement direction of the accumulator rack 607. The sidewall of the energy storage linear guide groove circumferentially limits the energy storage slider 601, ensuring that the energy storage slider 601 can only move along the energy storage direction and the release direction. The accumulator rack 607 has a first-level stop surface, a second-level stop surface, and a third-level stop surface on its side, which are sequentially staggered along the movement direction of the accumulator rack 607. The movable limit pin is installed in the transverse slide groove of the fixed frame and can move in a direction perpendicular to the movement direction of the cumulative rack 607. When the level output slide plate 508 is in the first position, the stroke selection fork aligns the movable limit pin with the movement path of the first-level stop surface; when the level output slide plate 508 is in the second position, the movable limit pin aligns with the movement path of the second-level stop surface; when the level output slide plate 508 is in the third position, the movable limit pin aligns with the movement path of the third-level stop surface. The independent load-bearing limit mechanism includes a first-level positioning groove, a second-level positioning groove, a third-level positioning groove provided on the movable limit pin, a load-bearing locking block, a load-bearing spring, and a locking block release rod provided on the fixed frame.After the stroke selection fork moves the movable limit pin to the first, second, or third position, the corresponding positioning groove aligns with the load-bearing locking block, and the load-bearing locking block enters the positioning groove under the action of the load-bearing spring. After the load-bearing locking block enters the positioning groove, it directly transmits the load of the movable limit pin along the rack movement direction to the fixed frame. The stroke selection fork and the level output slide plate 508 are only responsible for the lateral position selection of the limit pin and do not bear the axial load generated when the cumulative rack 607 hits the stop surface. After the closed-loop accumulation is completed and the state handover reset stage is entered, the locking block release rod first overcomes the force of the load-bearing spring, causing the load-bearing locking block to exit the positioning groove of the limit pin. Then, the limit pin reset rod 810 can return the movable limit pin to the selected position. When the load-bearing locking block has not exited, the stroke selection fork cannot forcibly drive the limit pin to move. The energy storage re-licensing mechanism includes an energy storage prohibition pin, a neutral zone re-licensing lever, a re-licensing holding groove, and an energy storage input gate. After a state handover reset is completed, the energy storage prohibition pin enters the prohibition slot of the energy storage slider 601, preventing the energy storage slider 601 from being immediately pushed back into the storage position by the transmission slider still within the effective area in the current direction, even though it has returned to the storage position. The neutral zone re-permission lever is positioned on the motion path of the input slider 201 returning to the initial neutral zone. After completing one closed loop, when the input slider 201 continues its return journey from the effective area in the current direction and enters the neutral zone, the neutral zone lever 211 pushes the neutral zone re-permission lever, which lifts the energy storage prohibition pin, causing it to exit the prohibition slot of the energy storage slider 601 and be held in the released position by the re-permission holding slot. Only after the energy storage prohibition pin exits does the energy storage input gate open the transmission path between the newly formed opposite-direction transmission slider and the energy storage slider 601. In the initial state of the device, the energy storage prohibition pin is in the released position, so any first effective half-cycle can complete the first energy storage. After each energy storage is completed, the energy storage input gate closes until the current closed loop is completed and the device passes through the neutral zone again before reopening.

[0036] In this embodiment, as Figure 1 and Figure 13 As shown, the irreversible accumulation mechanism 11 includes an accumulation shaft 701, on which a retaining ratchet 702 is mounted. An anti-reverse pawl 703, engaging with the retaining ratchet 702, is located beside the ratchet 702. One end of the accumulation shaft 701 is connected to a one-way clutch 611 to receive the one-way accumulation rotation output from the graded accumulation mechanism 10. The other end of the accumulation shaft 701 is connected to a threshold trigger mechanism 14 to transmit the accumulation angle of the accumulation shaft 701 to the threshold trigger mechanism 14. The accumulation shaft 701 is positioned axially by a shoulder and an axial limiting member, allowing it to rotate around its own axis without significant axial movement. The one-way clutch 611 blocks the reverse drive of the accumulation rack 607 on the accumulation shaft 701 during return, and the anti-reverse pawl 703 maintains the accumulated angle formed by the accumulation shaft 701 and resists external reverse disturbances.

[0037] In this embodiment, as Figure 1 and Figure 14 As shown, the graded endpoint buffer confirmation mechanism 12 includes a primary endpoint holding groove 705, a secondary endpoint holding groove 706, a tertiary endpoint holding groove 707, a deceleration ramp 708, an end buffer spring 709, an endpoint triggering ramp 710, an endpoint triggering rod 711, an endpoint confirmation swing arm 712, an endpoint holding pin 713, and a handover starting rod 714. The primary endpoint holding groove 705, secondary endpoint holding groove 706, and tertiary endpoint holding groove 707 are respectively disposed on the accumulator rack 607 and arranged sequentially along the moving direction of the accumulator rack 607. The three endpoint holding grooves correspond to the primary effective stroke endpoint, the secondary effective stroke endpoint, and the tertiary effective stroke endpoint of the accumulator rack 607, respectively, and the openings of the three endpoint holding grooves are located on the same endpoint holding pin's action path. After the grade output slide plate 508 selects a first-level, second-level, or third-level accumulation grade, the movable limit pin respectively limits the accumulation rack 607 to stop at the effective stroke end of the first-level, second-level, or third-level grade, aligning the corresponding first-level end-holding groove 705, second-level end-holding groove 706, or third-level end-holding groove 707 with the end-holding pin 713. When the accumulation rack 607 approaches the end of the selected grade, the deceleration ramp 708 first compresses the end buffer spring 709, causing the accumulation rack 607 to decelerate. As the accumulation rack 607 continues to move forward, the stop surface of the selected grade first acts on the end-point trigger ramp 710 set on the movable limit pin. The end-point trigger ramp 710 pushes the end-point trigger rod 711, causing the end-point confirmation swing arm 712 to drive the end-point holding pin 713 to move toward the end-point holding groove of the corresponding grade. After the end-point holding pin 713 enters the corresponding first-level end-point holding groove 705, second-level end-point holding groove 706, or third-level end-point holding groove 707, the stop surface of the selected grade then contacts the rigid bearing surface of the movable limit pin. After the endpoint holding pin 713 is fully engaged in the corresponding endpoint holding slot, the endpoint confirmation swing arm 712 pushes the handover start lever 714. If the cumulative rack 607 does not reach the actual endpoint of the selected level, the endpoint holding pin 713 cannot engage in the corresponding endpoint holding slot, the handover start lever 714 does not move, and the status handover reset mechanism 13 does not start.

[0038] In this embodiment, as Figure 1 and Figure 15As shown, the state handover reset mechanism 13 includes a handover camshaft 801, an AND gate return cam 802, an AND gate return confirmation pin 803, a previous direction selection reset cam 804, a current direction protection baffle 805, a state transition fork 806, a level slide reset cam 807, a previous direction slide release cam 808, a limit pin load release cam 809, a limit pin reset rod 810, a rack reset rod 811, an energy storage reset rod 812, and a release rod reset component 813. Two cam bearing seats are spaced apart on the handover reset mounting bracket, and both ends of the handover camshaft 801 are rotatably mounted on the two cam bearing seats via bearings. The handover camshaft 801 is axially arranged with the following components in sequence: AND gate return cam 802, upper direction selection reset cam 804, state transition drive unit, level slide reset cam 807, upper direction slide release cam 808, limit pin load release cam 809, and reset cam segments for driving the limit pin reset rod 810, rack reset rod 811, energy storage reset rod 812, and release rod reset member 813, respectively. These cams and reset cam segments are connected to the handover camshaft 801 by keys or fastening sleeves, and different circumferential starting angles, action angles, and idle stroke angles are set according to the state handover sequence, so that when the handover camshaft 801 rotates one revolution or one preset handover angle, each reset action occurs in the set sequence. After the handover start rod 714 pushes the handover camshaft 801 to rotate, the AND gate return cam 802 first pushes the first-level AND gate slide rod 501, the second-level AND gate slide rod 502, and the third-level AND gate slide rod 503 all back to their initial positions. After the three AND gate slide bars completely retract from the blocking area of ​​each latch plate, the AND gate return confirmation pin 803 enters the confirmation slot. Once the AND gate return confirmation pin 803 is in place, the previous direction selection reset cam 804 contacts the reset end of each amplitude latch plate in the previous direction. The current direction protection baffle 805 blocks each amplitude latch plate and the current direction turning confirmation plate in the current direction, keeping the current direction amplitude and turning state unchanged. The previous direction slide release cam 808 then lifts the previous direction one-way holding pawl and releases the previous direction turning confirmation plate. The previous direction peak following slide returns to its initial following position under the action of the independent slide return spring, and its initial position is limited by the slide return stop. When the current cycle transitions from the forward waiting confirmation state to the reverse turning state and completes the closed loop, the previous direction is forward and the current direction is reverse; the state transition fork 806 pushes the state transition disk 301 into the reverse waiting confirmation position. When the current cycle transitions from the reverse pending confirmation state to the forward turning state and completes the closed loop, the previous direction is reversed and the current direction is forward. After the amplitude and turning state of the previous direction are reset, the level slide reset cam 807 lifts the level holding lock pin 509, and the level output slide 508 returns to its initial position under the action of the reset spring. The limit pin load release cam 809 then causes the load-bearing lock block to exit the positioning groove of the movable limit pin through the lock block release rod. After the load-bearing lock block is completely retracted, the limit pin reset rod 810 drives the movable limit pin back to the selected position.The endpoint retaining pin 713 then exits the corresponding endpoint retaining slot, and the rack reset rod 811 and rack return spring 612 return the accumulating rack 607 to its initial position. When the accumulating rack 607 returns, the one-way clutch 611 is disengaged, and the accumulating shaft 701 maintains the current accumulated rotation angle. The energy storage reset rod 812 returns the energy storage slider 601 to the energy storage position, and simultaneously causes the energy storage inhibit pin to enter the inhibit slot of the energy storage slider 601. At this time, although the energy storage slider 601 has been reset, the residual effective displacement in the current direction cannot allow it to store energy again. Only when the input slider 201 subsequently enters the neutral zone and pushes the neutral zone re-permission paddle will the energy storage inhibit pin be released. After the above reset is completed, the release rod reset member 813 raises the single-release check pawl 522, the closed-loop release rod 520 returns to its initial position under the action of the return spring, and the closed-loop release locking pin 521 re-enters the locked state. The sequence of actions for the state handover and reset mechanism is as follows: graded endpoint confirmation, AND gate slide bar return, previous direction amplitude latch reset, previous direction turning state release, previous direction peak following slide return, current direction amplitude and turning state retention, state transition disk 301 reversal, grade output slide plate 508 reset, load-bearing lock block release, movable limit pin reset, accumulation rack 607 return, energy storage slider 601 reset and enters energy storage prohibition state, and closed-loop release lever 520 return. After completing the closed loop, the current direction peak following slide, amplitude latch, and turning confirmation slide are retained, constituting the starting turning state for the next cycle. If the input slider 201 moves again along the current direction before passing through the neutral zone and forms a deeper extreme value, the current direction peak following slide can continue to move in the direction of increasing amplitude under the permission of the unidirectional holding claw, and overwrite and update the current direction amplitude level and turning position. After the current direction turning state is overwritten and updated, the new deeper extreme value replaces the original current direction turning state as the starting turning point for the next cycle. The accumulated results of the previous cycle are not changed by this overwrite update. As long as the device has not performed a manual total reset, and the subsequent relative deformation completely passes through the neutral region from the preserved current direction turning state and forms a new turning state in the opposite direction, the two turning states are considered as adjacent turning points in the continuous deformation process, forming a closed loop. The time interval between the two turning points is not used as a mechanical determination condition.

[0039] In this embodiment, as Figure 1 and Figure 16As shown, the threshold triggering mechanism 14 includes a spiral propulsion sleeve 814 connected to the accumulation shaft 701, and a linear trigger slider 815 connected to the spiral propulsion sleeve 814. The spiral propulsion sleeve 814 is coaxially arranged with the accumulation shaft 701 and is circumferentially fixed to the accumulation shaft 701 by a key connection or spline connection, so that the spiral propulsion sleeve 814 rotates synchronously with the accumulation shaft 701. The spiral propulsion sleeve 814 is positioned axially by a shoulder and locking member on the accumulation shaft 701, and its outer circumference is provided with a continuous spiral guide groove. The spiral direction of the spiral guide groove corresponds to the accumulation direction of the accumulation shaft 701, so that when the accumulation shaft 701 rotates in the accumulation direction, the linear trigger slider 815 moves in the threshold triggering direction away from the accumulation zero position. The lead of the spiral guide groove is determined according to the correspondence between the unit accumulation angle of the accumulation shaft 701 and the required axial displacement of the linear trigger slider 815. The spiral propulsion sleeve 814 is provided with a spiral guide groove on its outer circumference, and the guide pin on the linear trigger slider 815 is embedded in the spiral guide groove. When the cumulative shaft 701 rotates, the spiral propulsion sleeve 814 pushes the linear trigger slider 815 to move axially. The linear trigger slider 815 is provided with a first-stage trip rod 818 and a second-stage trip rod 819 on its movement path, as well as a first-stage threshold retaining ring 816 and a second-stage threshold retaining ring 817, and a threshold adjustment ring 820, which are used to adjust the position of the trigger threshold.

[0040] In this embodiment, as Figure 1 and Figure 17 As shown, the mechanical warning holding mechanism 15 includes a primary warning indicator 901 and a secondary warning indicator 902. A primary release lever 818 is connected to the primary latch 905 of the primary warning indicator 901, and a secondary release lever 819 is connected to the secondary latch 906 of the secondary warning indicator 902. The warning mounting bracket is provided with independent primary and secondary indicator guide grooves. The primary warning indicator 901 is slidably disposed in the primary indicator guide groove, and the secondary warning indicator 902 is slidably disposed in the secondary indicator guide groove. The primary warning indicator 901 and the secondary warning indicator 902 can move between a retracted position and a warning display position, respectively. The display surfaces of the primary warning indicator 901 and the secondary warning indicator 902 are respectively provided with mutually distinguishable primary and secondary warning indicators. When both warning indicators are in the retracted position, their display surfaces are located in the non-display area of ​​the observation cover 909; after moving to the warning display position, the corresponding display surfaces enter the visible area of ​​the observation cover 909. When the accumulated amount reaches the Level 1 warning threshold, the Level 1 warning indicator 901 pops up and remains in place; when the accumulated amount reaches the Level 2 warning threshold, the Level 2 warning indicator 902 pops up and remains in place. The return of the water-cooled wall cooling and the actuator lever 108 to the neutral position will not cause the already popped warning indicators to retract automatically.

[0041] This device also includes a manual reset mechanism 16, such as Figure 1 and Figure 18As shown, the manual master reset mechanism 16 includes a reset shaft 910, a master reset cam 911, a ratchet release component 912, a zero-return gear set 913, and an anti-misoperation cap 914. A reset bearing seat is provided on the mechanism housing, and the reset shaft 910 is rotatably mounted on the reset bearing seat via a bushing or bearing. The outer end of the reset shaft 910 extends out of the mechanism housing and is provided with a non-circular special tool interface, while the inner end of the reset shaft 910 extends into the enclosed transmission cavity of the manual master reset mechanism. The master reset cam 911 is fixedly mounted on the inner end of the reset shaft 910, and the input end of the zero-return gear set 913 is connected to the reset shaft 910 through a preset idle angle structure. The preset idle angle structure ensures that when the reset shaft 910 begins to rotate, it only drives the master reset cam 911. Only after all retaining components are released and the anti-reverse ratchet 703 is completely disengaged from the retaining ratchet 702 does the reset shaft 910 form an effective transmission with the zero-return gear set 913. After maintenance, the reset shaft 910 is rotated using a special tool. The main reset cam 911 sequentially retracts the warning indicator, resets the positive and negative amplitude latch, resets the positive and negative peak following sleeve, releases the positive and negative turning confirmation plate, returns the state transition disk 301 to its initial state, returns the bistable pendulum 212 to its initial permitted position, resets the mechanical level comparison mechanism 7, and resets the accumulation rack 607 and energy storage slider 601. The pawl release component 912 temporarily disengages the anti-reverse pawl 703 from the holding ratchet 702, and the reset shaft 910 drives the accumulation shaft 701 to rotate back to the accumulation zero position via the zero-return gear set 913. After the accumulation shaft 701 returns to zero, the linear trigger slider 815 synchronously returns to its initial position, and the anti-reverse pawl 703 re-engages with the holding ratchet 702.

[0042] Before installation, welding samples with the same or similar base material, welding method, pipe diameter, fin size, and welding process as the water-cooled wall weld to be monitored are selected for cyclic deformation calibration. The forward idle stroke 209 and reverse idle stroke 210 are set according to the deformation range that will not produce significant fatigue accumulation or fall below the warning requirement. The first, second, and third level mechanical accumulation weights are determined based on the proportion of cycles required to reach the preset crack initiation criterion under different cyclic deformation amplitudes. The effective strokes of the first, second, and third levels of racks are determined based on these mechanical accumulation weights. The forward return clearance and reverse return clearance are determined based on the non-target jitter amplitude, and must satisfy the condition of being greater than the maximum non-target jitter amplitude and less than the preset proportion of the first-level amplitude threshold distance.

[0043] During boiler operation, when the relative displacement on both sides of the weld does not exceed the forward idle stroke 209 or the reverse idle stroke 210, the input slider 201 only moves within the idle stroke and does not form an effective directional state. When the effective forward displacement is formed first, the state transition disk 301 enters the positive pending confirmation position, and the positive peak value follows the sliding sleeve 401 as the forward transmission slider 206 moves in the positive direction, and sequentially triggers the corresponding amplitude level latching plate; the energy storage slider 601 completes fixed-stroke energy storage in the energy storage permission state. After the forward transmission slider 206 reaches the positive extreme value and returns to the positive return gap, the positive turning confirmation plate 412 latches the positive turning state, and the positive first turning permission pin 514 exits the corresponding blocking position of the reverse closed-loop push rod 511. The input slider 201 then completely passes through the neutral zone, the bistable swing plate 212 enters the reverse permission position, and at the same time, the neutral zone re-permission lever maintains the next energy storage permission state. After the effective reverse displacement is formed, the reverse peak value follows the sliding sleeve 421 as it moves with the reverse transmission slider 207, and sequentially triggers the reverse amplitude level latching plate. After the reverse transmission slider 207 reaches the reverse extreme value and the return stroke reaches the reverse return gap, the reverse turning confirmation plate 432 latches the reverse turning state. At this time, the forward pending confirmation state, the forward turning confirmation state, the neutral zone reverse permission state, and the reverse turning confirmation state are all established simultaneously, and the reverse closed-loop push rod 511 pushes the closed-loop release rod 520. The closed-loop release rod 520 first pushes the comparison drive plate 504, and the mechanical level comparison mechanism 7 determines the highest discrete amplitude level reached by the two turning points, and the level output slide plate 508 is locked in the corresponding level position. The stroke selection fork moves the movable limit pin to the corresponding level position, and the load-bearing locking block enters the corresponding positioning groove. The closed-loop release rod 520 then releases the energy storage holding claw 604, and the energy storage slider 601 pushes the accumulation rack 607 to move in the accumulation direction. The accumulator rack 607 drives the accumulator shaft 701 to rotate via the accumulator pinion 610 and the one-way clutch 611. When the accumulator rack 607 approaches the selected grade endpoint, the grade endpoint buffer confirmation mechanism 12 first completes deceleration and endpoint holding, and then the load is transferred to the movable limit pin and the fixed frame by the corresponding stop surface. After the grade endpoint confirmation is completed, the state handover reset mechanism 13 clears the positive amplitude and turning state in a predetermined order, retains the reverse amplitude and turning state, and puts the state transition disk 301 into the reverse waiting confirmation position. After the energy storage slider 601 is reset, it is locked by the energy storage prohibition pin and cannot be immediately repeated by the transmission slider that is still in the reverse effective area. After the input slider 201 continues to return from the reverse area and enters the neutral area, the neutral area permission paddle releases the energy storage prohibition pin. Thereafter, the new positive effective displacement can complete the next energy storage and form the next closed-loop candidate with the retained reverse turning state.Thus, the device achieves coverage updates of deeper extreme values ​​in the current direction through a unidirectional overshoot peak following slide, eliminates repeated energy storage after state handover through a neutral zone energy storage re-licensing mechanism, ensures that both the first and second direction transitions have been formed through four series licenses, confirms the rack endpoints of different levels through graded endpoint holding slots, and transfers the endpoint load of the accumulated rack 607 to the fixed frame through an independent load-bearing locking block, thereby preventing the graded output slide plate 508 and the stroke selection fork from bearing accumulated impact.

[0044] This invention also provides a method for early warning of cyclic deformation accumulation fatigue in water-cooled wall welds, which utilizes the aforementioned device for early warning of cyclic deformation accumulation fatigue in water-cooled wall welds, comprising: The floating actuator 1 acquires the relative cyclic deformation along the preset detection direction on both sides of the weld seam of the water-cooled wall to be monitored. The bidirectional idle stroke screening mechanism 2 outputs a positive or negative effective displacement after the relative cyclic deformation exceeds the fatigue calculation threshold in the corresponding direction. The direction state latching mechanism 4 latches the direction in which the effective displacement is formed first as the first direction and determines the direction opposite to the first direction and the direction in which the effective displacement is formed later as the second direction. The bidirectional amplitude and turning point latching mechanism saves the extreme value position of the corresponding direction in one direction, latches the corresponding amplitude level according to the preset extreme value position, and latches the turning point confirmation state after the effective displacement in the corresponding direction returns from the extreme value position to the preset return amount. The neutral zone transition confirmation mechanism 3 opens the closed-loop confirmation path of the second direction after the relative cyclic deformation completely passes through the neutral zone in the first direction. The cyclic closed-loop confirmation mechanism 8 in the second direction... When the direction latching state and turning confirmation state of one direction are established, the relative cyclic deformation completely passes through the neutral region, and the turning confirmation state of the second direction is established, a closed-loop release action is output; the mechanical level comparison mechanism 7 determines the highest amplitude level reached by the two directions based on the amplitude levels latched by the first and second directions respectively; the graded accumulation mechanism 10 responds to the closed-loop release action, selects the corresponding mechanical accumulation stroke according to the determined highest amplitude level, converts the mechanical accumulation stroke into an irreversible accumulation amount, and clears the amplitude and turning state of the first direction after one accumulation is completed, retains the amplitude and turning state of the second direction, and converts the second direction into the first direction of the next cycle; the threshold triggering mechanism 14 triggers the mechanical warning holding mechanism 15 when the irreversible accumulation amount reaches the set threshold, and the mechanical warning holding mechanism 15 triggers the visual warning indicator.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A fatigue early warning device for cyclic deformation accumulation of water-cooled wall welds, characterized in that, It includes a first mounting base and a second mounting base respectively set on both sides of the weld of the water-cooled wall to be monitored. A floating take-up mechanism (1) is connected between the first mounting base and the second mounting base. The floating take-up mechanism (1) is connected to a bidirectional empty stroke screening mechanism (2). The bidirectional empty travel screening mechanism (2) is connected to the directional state latching mechanism (4), the bidirectional amplitude and turning point latching mechanism and the neutral zone transition confirmation mechanism (3) respectively; The directional state latching mechanism (4), the neutral zone transition confirmation mechanism (3), and the bidirectional amplitude and turning point latching mechanism are all connected to the cyclic closed-loop confirmation mechanism (8); A mechanical level comparison mechanism (7) is connected to the bidirectional amplitude and turning point latch mechanism. Both the mechanical level comparison mechanism (7) and the cyclic closed-loop confirmation mechanism (8) are connected to a graded accumulation mechanism (10). An irreversible accumulation mechanism (11) is connected to the graded accumulation mechanism (10). A threshold trigger mechanism (14) is connected to the irreversible accumulation mechanism (11). A mechanical warning holding mechanism (15) is connected to the threshold trigger mechanism (14).

2. A water-cooled wall weld cyclic deformation cumulative fatigue early warning device according to claim 1, characterized in that, The floating take-up mechanism (1) includes a take-up rod (108), which is connected to the bidirectional idle stroke screening mechanism (2). One end of the take-up rod (108) is provided with a first ball joint (106), which is connected to a first mounting base. The other end of the take-up rod (108) is fitted with an axial guide sleeve (109). The end of the axial guide sleeve (109) away from the first ball joint (106) is connected with a second ball joint (107), which is connected to a transverse compensation slide (110). The transverse compensation slide (110) is slidably installed in the transverse guide groove (111) provided on the guide mounting plate. Both sides of the transverse compensation slide (110) are provided with elastic centering members (112) for resetting. The guide mounting plate is installed on the second mounting base. The bidirectional empty travel screening mechanism (2) includes an input slider (201) connected to the take-up lever (108). A positive threshold block (202) is provided on one side of the input slider (201), and a reverse threshold block (203) is provided on the other side of the input slider (201). A neutral zone transition confirmation mechanism (3) is provided between the reverse threshold block (203) and the positive threshold block (202). The neutral zone transition confirmation mechanism (3) is located within the movement path of the input slider (201). A forward drive slider (206) is installed between the input slider (201) and the forward sill block (202). A forward free stroke (209) is reserved between the forward drive slider (206) and the input slider (201). The forward drive slider (206) is provided with a through hole, and a take-up rod (108) passes through the through hole. A reverse transmission slider (207) is installed between the input slider (201) and the reverse threshold block (203); a reverse transmission slider (207) is reserved between the reverse transmission slider (207) and the input slider (201). When the input slider (201) passes the forward empty stroke (209), it pushes the forward transmission slider (206); when it passes the reverse empty stroke (210), it pushes the reverse transmission slider (207).

3. A water-cooled wall weld cyclic deformation cumulative fatigue early warning device according to claim 2, characterized in that, The neutral zone transition confirmation mechanism (3) includes a neutral zone lever (211), which is rotatably installed in the mechanism housing and located in the movement path of the input slider (201). The lower end of the neutral zone lever (211) abuts against a bistable pendulum (212), and both sides of the bistable pendulum (212) are provided with a centering spring (213). The swing end of the bistable pendulum (212) is provided with a forward passage lock pin (216) and a reverse passage lock pin (217). The forward passage lock pin (216) and the reverse passage lock pin (217) are respectively connected to the movement blocking paths of the forward confirmation passage lock pin (518) and the reverse confirmation passage lock pin (519) in the closed-loop confirmation mechanism (8), so that the closed-loop path permission state in the corresponding direction is switched after the input slider (201) has completely passed through the neutral zone.

4. A water-cooled wall weld cyclic deformation cumulative fatigue early warning device according to claim 2, characterized in that, The directional state latching mechanism (4) includes a state transition disk (301). The state transition disk (301) is symmetrically provided with a forward drive claw (302) and a reverse drive claw (303). The input end of the forward drive claw (302) corresponds to the movement path of the transmission slider (206), and the input end of the reverse drive claw (303) corresponds to the movement path of the reverse transmission slider (207). The forward drive slider (206) pushes the forward drive claw (302) to rotate to turn the state transition disk (301), and the reverse drive slider (207) pushes the reverse drive claw (303) to rotate to turn the state transition disk (301).

5. A water-cooled wall weld cyclic deformation cumulative fatigue early warning device according to claim 2, characterized in that, The bidirectional amplitude and inflection latch mechanism includes a positive amplitude and inflection latch mechanism (5) and a negative amplitude and inflection latch mechanism (6). The positive amplitude and turning latching mechanism (5) includes a positive peak following slide sleeve (401), which abuts against a positive pushing shoulder provided on a positive transmission slider (206) to drive the positive peak following slide sleeve (401) to move. The positive peak following slide sleeve (401) is provided with a positive one-way ratchet rack (402) and a positive one-way holding claw (403) that cooperates with the positive one-way ratchet rack (402). The positive peak following slide sleeve (401) is provided with a positive first-level trigger part (404), a positive second-level trigger part (405) and a positive third-level trigger part (406) in sequence in its moving direction. The reverse amplitude and turning latching mechanism (6) includes a reverse peak following slide (421), which abuts against a reverse push shoulder provided on the reverse transmission slider (207) to drive the reverse peak following slide (421) to move; the reverse peak following slide (421) is provided with a reverse one-way ratchet (422) and a reverse one-way holding pawl (423) that cooperates with the reverse one-way ratchet (422). The reverse peak following slide (421) is provided with a reverse first-level trigger (424), a reverse second-level trigger (425) and a reverse third-level trigger (426) in sequence along its moving direction.

6. A water-cooled wall weld cyclic deformation cumulative fatigue early warning device according to claim 1, characterized in that, The closed-loop confirmation mechanism (8) is equipped with a forward closed-loop push rod (510) and a reverse closed-loop push rod (511). The forward closed-loop push rod (510) is provided with a reverse state permission baffle (513), a reverse first turning permission pin (515), a forward confirmation pass lock pin (518) and a reverse second turning permission pin (517) in sequence along its movement path. The moving path of the reverse closed-loop push rod (511) is sequentially provided with a forward state permission baffle (512), a forward first turning permission pin (514), a reverse confirmation passage lock pin (519), and a forward second turning permission pin (516). The forward state permission baffle (512) and the reverse state permission baffle (513) are respectively connected to the state transition disk (301); the forward confirmation access lock pin (518) is connected to the forward access lock pin (216); the reverse confirmation access lock pin (519) is connected to the reverse access lock pin (217); the forward first turning permission pin (514) is connected to the forward turning confirmation piece (412); the reverse second turning permission pin (517) is connected to the reverse turning confirmation piece (432). A closed-loop release rod (520) is connected between the forward closed-loop push rod (510) and the reverse closed-loop push rod (511), and the closed-loop release rod (520) is connected to the graded accumulation mechanism (10).

7. A water-cooled wall weld cyclic deformation cumulative fatigue early warning device according to claim 5, characterized in that, The mechanical grade comparison mechanism (7) includes a comparison drive plate (504), on which a first-level AND gate slide bar (501), a second-level AND gate slide bar (502) and a third-level AND gate slide bar (503) are connected. The first-level AND gate slide bar (501) is connected to the positive first-level trigger unit (404) and the negative first-level trigger unit (424) respectively; the second-level AND gate slide bar (502) is connected to the positive second-level trigger unit (405) and the negative second-level trigger unit (425) respectively; and the third-level AND gate slide bar (503) is connected to the positive third-level trigger unit (406) and the negative third-level trigger unit (426) respectively. The output ends of the first-level AND gate slide (501), the second-level AND gate slide (502) and the third-level AND gate slide (503) are respectively provided with level output slides (508), and level holding lock pins (509) are provided on the side of the level output slides (508). The level output slides (508) are connected to the grade accumulation mechanism (10).

8. A water-cooled wall weld cyclic deformation cumulative fatigue early warning device according to claim 1, characterized in that, The graded accumulation mechanism (10) includes an energy storage slider (601) and an accumulation rack (607); a drive spring (603) is provided on one side of the energy storage slider (601), and a fixed energy storage stop block (602) is connected to the drive spring (603). The energy storage slider (601) is connected to a stroke selection fork and an energy storage holding claw (604). The stroke selection fork is connected to the level output slide plate (508), and the energy storage holding claw (604) is connected to the closed-loop release rod (520). The energy storage slider (601) is connected to the accumulation rack (607), and the accumulation rack (607) is meshed with an accumulation pinion (610). The accumulation pinion (610) is connected to the irreversible accumulation mechanism (11). The irreversible accumulation mechanism (11) includes an accumulation shaft (701) on which a retaining ratchet (702) is mounted, and an anti-reverse pawl (703) that meshes with the retaining ratchet (702) is provided on the side of the retaining ratchet (702); one end of the accumulation shaft (701) is connected to the accumulation pinion (610), and the other end of the accumulation shaft (701) is connected to the threshold triggering mechanism (14).

9. A water-cooled wall weld cyclic deformation cumulative fatigue early warning device according to claim 8, characterized in that, The threshold triggering mechanism (14) includes a spiral propulsion sleeve (814) connected to the accumulation shaft (701), and a linear triggering slider (815) is connected to the spiral propulsion sleeve (814). The linear trigger slider (815) has a first-level trip lever (818) and a second-level trip lever (819) on its movement path. The mechanical warning holding mechanism (15) includes a primary warning sign (901) and a secondary warning sign (902). The primary release lever (818) is connected to the primary latch (905) of the primary warning sign (901), and the secondary release lever (819) is connected to the secondary latch (906) of the secondary warning sign (902).

10. A method for early warning of cyclic deformation accumulation fatigue of water-cooled wall welds, using the early warning device for early warning of cyclic deformation accumulation fatigue of water-cooled wall welds according to any one of claims 1 to 9, characterized in that, include: The floating take-off mechanism (1) is used to obtain the relative cyclic deformation of both sides of the water-cooled wall weld along the preset detection direction. The bidirectional empty stroke screening mechanism (2) outputs the positive effective displacement or the reverse effective displacement after the relative cyclic deformation exceeds the fatigue calculation threshold in the corresponding direction. The direction state latching mechanism (4) latches the direction that first forms an effective displacement as the first direction, and determines the direction that is opposite to the first direction and forms an effective displacement later as the second direction; The bidirectional amplitude and turning point latching mechanisms each unidirectionally store the extreme value position in the corresponding direction. The corresponding amplitude level is latched according to the preset extreme value position. After the effective displacement in the corresponding direction returns from the extreme value position to the preset return amount, the turning point confirmation state is latched. After the relative cyclic deformation has completely passed through the neutral region in the first direction, the neutral region transition confirmation mechanism (3) opens the closed-loop confirmation path in the second direction; When the cyclic closed-loop confirmation mechanism (8) is in the first direction, the direction latching state and the turning confirmation state are established, the relative cyclic deformation has completely passed through the neutral region, and the turning confirmation state of the second direction is established, it outputs a closed-loop release action. The mechanical grade comparison mechanism (7) determines the highest amplitude level that can be achieved in both directions based on the amplitude levels locked in the first and second directions respectively. The graded accumulation mechanism (10) responds to the closed-loop release action, selects the corresponding mechanical accumulation stroke according to the determined highest amplitude level, converts the mechanical accumulation stroke into an irreversible accumulation amount, and clears the amplitude and turning state of the first direction after one accumulation is completed, retains the amplitude and turning state of the second direction, and converts the second direction into the first direction of the next cycle. The threshold triggering mechanism (14) triggers the mechanical warning holding mechanism (15) when the irreversible accumulation reaches the set threshold, and the mechanical warning holding mechanism (15) triggers the visual warning sign.

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