Pouring active compensation embedded part installation system and method for nuclear fusion device

Abstract

This invention provides an active compensation embedded component installation system and method for nuclear fusion devices, belonging to the field of building engineering and nuclear facility construction technology. The system includes a modular internal support frame, a servo scissor lift support, a three-bar scissor lift, a crossbeam, and sensor components. The modular internal support frame is placed inside the embedded component's cavity. The servo scissor lift support and the three-bar scissor lift are installed at the frame's adjustment points and support the inner wall of the embedded component. Their bases are fixed to the crossbeam. The sensor components monitor the embedded component's attitude and deformation in real time. The installation method includes: positioning and installing the internal support frame, applying initial preload to calibrate the attitude, performing dynamic monitoring and pre-compensation during the phase transition stage of concrete pouring, pouring and compensating thick areas in layers, and finally disassembling the fixtures. This invention achieves active, real-time compensation for the embedded component's deformation during pouring through closed-loop control, ensuring its installation accuracy.

Description

Technical Field

[0001] This invention belongs to the field of building engineering and nuclear facility construction technology, specifically relating to an active compensation type pre-embedded component installation system and method for nuclear fusion devices. Background Technology

[0002] In the construction of compact fusion energy experimental devices, the Dewar window is a crucial interface connecting the external system and the internal vacuum chamber, and its installation accuracy directly determines the precision of subsequent operations. The embedded parts in this area are characterized by their large size, heavy weight, and extremely high installation accuracy requirements (typically requiring a flatness of ≤2mm and a verticality error of ≤0.1°). Traditional methods for installing embedded parts often employ rigid supports or one-time adjustment positioning, which cannot dynamically compensate for real-time deflection deformation caused by factors such as gravity, fluid pressure, and temperature changes during concrete pouring, vibration, and curing. For example, Chinese patent application CN120608603A (a hydraulic fine-tuning device and construction method for embedded parts) can only perform static fine-tuning during the welding stage and cannot address the dynamic deformation during the pouring and curing stages.

[0003] Concrete shrinkage and creep (the phenomenon where strain gradually increases over time while stress remains constant under long-term constant load) can also cause irreversible displacement of embedded parts in later stages. Current technologies lack an active, adjustable stress application mechanism, making it difficult to guarantee the final installation accuracy of embedded parts. This not only increases the difficulty and cost of subsequent equipment installation adjustments but also potentially threatens the performance and safety of the entire fusion experimental device during use. Furthermore, current embedded part positioning methods based on manual monitoring and adjustment rely on experience for local corrections. Adjustments are lagging, accuracy depends on manual judgment, and real-time, closed-loop control is impossible. Moreover, reliability is insufficient in high-precision scenarios. Summary of the Invention

[0004] To address the problem that traditional embedded part installation methods cannot dynamically compensate for the real-time deformation of embedded parts during concrete pouring and curing, resulting in insufficient installation accuracy and affecting the difficulty and safety of subsequent operations, this invention provides an active compensation embedded part installation system and method for nuclear fusion devices. This system can detect and offset the deformation of embedded parts during construction in real time, ensuring that the final installation accuracy meets the extreme requirements of nuclear fusion devices.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An active compensation embedded component installation system for nuclear fusion device casting includes an inner support frame, multiple servo scissor supports, at least one three-bar scissor lift, a crossbeam, a control system, and a sensor assembly. The inner support frame is a modular and detachable structure with multiple adjustment points on its inner wall. Multiple modular and detachable structures are attached to the inner wall of the assembled embedded component. The servo scissor lift is installed at preset adjustment points on the inner wall of the inner support frame, with its top end supporting the inner wall of the inner support frame. The three-bar scissor lift is positioned between adjacent crossbeams, with the crossbeams laterally supporting the adjustment points on the inner wall of the inner support frame. The bases of the servo scissor lift and the mounting seats of the three-bar scissor lift are fixed to the crossbeam and aligned. The sensor assembly is used to monitor the attitude and deformation data of the embedded component in real time. The PLC controller of the control system is connected to the sensor assembly, the first drive motor of the servo scissor lift, the second drive motor of the three-bar scissor lift, and the drive motors of the scissor lift supports on both sides of the crossbeam, adjusting the horizontal and vertical deformation in real time to achieve dynamic deformation compensation throughout the entire casting process of the embedded component.

[0007] This invention also provides a method for installing cast-in-place active compensation embedded parts for nuclear fusion devices, employing the aforementioned installation system for cast-in-place active compensation embedded parts for nuclear fusion devices, comprising the following steps:

[0008] S1. Hoist the assembled embedded parts to the reference position of the Dewar window for rough positioning, and send the inner support frame into the internal cavity of the embedded parts for splicing and fixing.

[0009] S2. Install the servo scissor lift support and crossbeam in sequence on the adjustment points of the inner support frame, install the three-bar scissor lift between adjacent crossbeams, and start the control system to apply the initial preload to all adjustment points synchronously to calibrate the initial posture of the embedded parts.

[0010] S3. Activate the control system. During the entire concrete pouring process, based on the data collected in real time by the sensor components, dynamically monitor and pre-compensate the deformation of the embedded parts according to the concrete phase transformation stage.

[0011] S4. For embedded parts areas with concrete thickness greater than 500mm, a layered pouring method is adopted. Dynamic compensation is activated after each layer is poured, and the compensation force is gradually released according to the gradient after the final pouring is completed.

[0012] S5. After the concrete has cured to the design strength, shut down the control system, gradually release the pre-tightening force, and disassemble the active compensation embedded part installation system.

[0013] Beneficial effects:

[0014] 1. This invention achieves active and real-time compensation for the deformation of embedded parts through closed-loop control, and stably controls the installation accuracy (flatness) within 2mm.

[0015] 2. This invention can effectively cope with various dynamic loads during the concrete pouring process and solves the problem of real-time deflection deformation that traditional rigid supports cannot solve.

[0016] 3. The tooling of this invention adopts a modular and reusable design, which reduces the cost per use. At the same time, the extremely high first-time installation success rate significantly reduces rework and shortens the construction period.

[0017] 4. The invention employs high-strength materials and trapezoidal threads to ensure the structural stability and durability of the tooling under heavy-load conditions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the installation of the active compensation embedded part installation system for nuclear fusion devices using the present invention.

[0019] Figure 2 This is a diagram showing the layout of the internal support frame and adjustment points;

[0020] Figure 3a This is a schematic diagram of a servo scissor lift support.

[0021] Figure 3b Side view of the servo scissor lift support;

[0022] Figure 4 This is a schematic diagram of a scissor lift mechanism;

[0023] Figure 5 This is a schematic diagram of a crossbeam.

[0024] Figure 6 This is a block diagram illustrating the principle of the control system.

[0025] Figure 7 This is a flowchart of the active compensation embedded component installation method for nuclear fusion devices according to the present invention.

[0026] The attached figures are labeled as follows: 1-Servo scissor lift support; 2-Three-bar scissor lift; 3-Crossbeam; 4-Sensor assembly; 11-Top plate; 12-Upper scissor lift plate; 13-Lower scissor lift plate; 14-Self-locking trapezoidal lead screw; 15-First drive motor; 16-Base; 17-Large gear; 18-Small gear; 21-Upper double-sided scissor lift rod; 22-Lower scissor lift rod; 23-Servo-driven scissor lift; 24-Hinged seat; 25-Mounting seat; 26-Second drive motor; 31-Two-sided scissor lift support; 32-Telescopic rod; 5-Embedded part; 6-Pouring active compensation embedded part installation system; 7-Internal support frame. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0028] like Figure 1 , Figure 2 As shown, the embedded part 5 is a stainless steel component specifically for the Dewar window of a nuclear fusion device. It is assembled from four embedded plates (including stainless steel plates and anchor bars) to form a rectangular embedded part assembly. The embedded part assembly has a cavity inside and is embedded in concrete. An inner support frame 7 is attached to the inner wall of the cavity inside the embedded part assembly. The width of the inner support frame 7 is smaller than the width of the embedded plate.

[0029] The active compensation embedded part installation system for nuclear fusion devices of the present invention includes a servo scissor lift support 1, a three-bar scissor lift 2, a crossbeam 3, a sensor assembly 4, and an inner support frame 7. The servo scissor lift support 1, the three-bar scissor lift 2, the crossbeam 3, and the sensor assembly 4 constitute the main body of mechanical execution and support. Together with the control system, they form a complete system of real-time monitoring, intelligent calculation, precise driving, and self-locking shape preservation. The mechanical structure and the control system work together to realize dynamic deformation compensation throughout the entire process of embedded part casting.

[0030] The active compensation embedded part installation system 6 is integrally arranged in the cavity inside the embedded part 5. The inner support frame 7 is a modular and detachable space truss structure with multiple adjustment points. The servo scissor support 1 is installed at the adjustment points of the inner support frame 7, with its top directly supporting the inner wall of the inner support frame 7, and the base 16 is fixed to the crossbeam 3; the mounting seat 25 of the three-link scissor 2 is aligned with the base 16 of the servo scissor support 1 and the crossbeam 3. Multiple crossbeams 3 are laterally supported at both ends of the inner support frame 7 and rigidly connected to the inner support frame 7; the sensor assembly 4 is respectively arranged at the monitoring points of the inner support frame 7 and the key stress parts of the embedded part 5 for real-time acquisition of attitude and deformation data.

[0031] like Figure 3a , Figure 3bAs shown, the servo scissor lift support 1 is the core support and drive unit of the system, including a top plate 11, a pair of upper scissor plates 12 and lower scissor plates 13, a self-locking trapezoidal lead screw 14, a first drive motor 15, a base 16, a large gear 17, and a small gear 18. The upper scissor plates 12 and lower scissor plates 13 are cross-hinged to form the scissor lift body; the output shaft of the first drive motor 15 is connected to the small gear 18, and the large gear 17 is connected to the self-locking trapezoidal lead screw 14, with the small gear 18 and the large gear 17 maintaining a meshing state. The small gear 18 meshes with the large gear 17 for transmission, and the large gear 17 drives the self-locking trapezoidal lead screw 14 to rotate; the self-locking trapezoidal lead screw 14 passes through the gap between the upper scissor plates 12 and lower scissor plates 13, and is threadedly engaged with the upper scissor plates 12 and lower scissor plates 13, realizing the lifting and lowering of the scissor mechanism through forward and reverse rotation. The bottom end of the lower scissor plate 13 is connected to the base 16 via a threaded pin; the top plate 11 is connected to the upper scissor plate 12 via a threaded pin. The self-locking trapezoidal screw 14 has a power-off self-locking function to prevent the embedded parts 5 from sinking or shifting during the pouring process; the top plate 11 directly supports the inner wall of the inner support frame 7, and the base 16 is fixed to the crossbeam 3. The overall output rated jacking force is 2 tons, the displacement adjustment accuracy is 0.01mm, and the response frequency is ≥10Hz, meeting the high-precision support requirements of nuclear fusion devices.

[0032] like Figure 4 As shown, the three-bar scissor lift 2 is a two-stage reinforced support mechanism, including an upper double-sided scissor lift 21, a lower scissor lift 22, a servo-driven scissor lift 23, a hinge seat 24, a mounting base 25, and a second drive motor 26. The upper double-sided scissor lift 21 and the lower scissor lift 22 form a three-bar linkage structure through the hinge seat 24, improving the support rigidity and stability. The servo-driven scissor lift 23 is a scissor-type telescopic drive structure, with one end hinged to the hinge seat 24 and the other end connected to the output end of the second drive motor 26. The second drive motor 26 and the servo-driven scissor lift 23 are fixedly connected by threads. The mounting base 25 is set on the hinge seat 24 at one end fixed to the crossbeam 3. The structure of the servo-driven scissor lift 23 is the same as that of the pair of upper scissor plates 12 and lower scissor plates 13.

[0033] The servo-driven scissor lift 23 is independently driven by the second drive motor 26 and moves synchronously with the servo scissor lift support 1 to achieve multi-point collaborative compensation; the mounting base 25 is fixedly installed on the crossbeam 3 to fix the three-link scissor lift 2 as a whole, ensuring that the support position is accurate, does not shift, and does not shake.

[0034] Preferably, the three-bar scissor lift 2 is positioned between adjacent crossbeams 3, and the mounting bases 25 of adjacent three-bar scissor lift 2 are aligned.

[0035] like Figure 5As shown, the crossbeam 3 is the load-bearing foundation component of the system, including two scissor supports 31 and a telescopic rod 32. The two scissor supports 31 are symmetrically arranged at both ends of the telescopic rod 32, and the other end is set at the adjustment point of the inner support frame 7. The two scissor supports 31 have the same structure as the servo scissor support 1, and also have components such as a drive motor. The telescopic rod 32 can achieve adaptive length adjustment to adapt to the internal support of Dewar window embedded parts of different widths and specifications; the crossbeam 3 adopts a high-strength steel structure, and its overall bending and torsional resistance meets the requirements of heavy-load casting conditions. After being spliced ​​with the inner support frame, it forms a stable support skeleton.

[0036] The servo scissor lift support 1 and the three-link scissor lift 2 provide vertical adjustment, while the crossbeam 3 provides horizontal adjustment.

[0037] The sensor assembly 4 is a system monitoring unit, integrating a laser rangefinder, tilt sensor, displacement sensor, and temperature sensor, such as... Figure 6 The layout is as shown.

[0038] A laser rangefinder monitors the flatness and vertical deflection of the embedded parts in real time, with a measurement accuracy of ±0.02mm; an inclination sensor monitors the verticality and horizontality of the embedded parts in real time, with a measurement accuracy of ±0.01°, meeting the error requirement of ≤0.1°; a temperature sensor is embedded inside the concrete to collect hydration temperature data, providing a basis for shrinkage and creep compensation; the sampling frequency of all sensors is synchronized with the initial setting time gradient of the concrete, and the data is uploaded in real time to the control system integrated in the PLC control cabinet. The control system includes a PLC controller, a servo driver, and a signal acquisition module; the servo driver is located inside the PLC control cabinet and is connected to the first drive motor 15 and the second drive motor 26 respectively, used to receive instructions from the PLC controller and drive the motors to move; the control system directly controls the start, stop, direction, speed, and output force of the first drive motor 15 and the second drive motor 26.

[0039] Adjustment points are evenly distributed on the inner wall of the inner support frame 7. The number of adjustment points is preferably 12, but can be adjusted between 8 and 16 depending on the size of the embedded part 5. The servo scissor support 1 and the crossbeam 3 are installed on the adjustment points to form a balanced support in the whole area and at multiple points, avoiding local stress concentration.

[0040] This invention uses a PLC controller within a PLC control cabinet as its core, connecting sensor assembly 4, first drive motor 15, second drive motor 26, drive motors of the two scissor supports 31, and matching servo drivers. This forms a real-time acquisition-model calculation-dual-parameter adjustment-self-locking conformal feeding-feedback composite control loop, fully covering the entire process of concrete pouring, flow, plasticity, and curing, achieving real-time compensation and advanced pre-compensation for the deformation of embedded parts. Specifically, it includes the following steps:

[0041] Step 1. Data collection:

[0042] like Figure 6 As shown, sensor assembly 4 is the system monitoring unit, realizing functions such as laser ranging, tilt measurement, displacement sensing, and temperature sensing. Its sampling frequency is synchronized with the initial setting time gradient of the concrete and dynamically adjusted according to the concrete phase transition stage. The laser rangefinder is deployed at the corresponding monitoring position on the inner support frame 7 to collect real-time data on the flatness, vertical displacement, and deflection deformation of the embedded component assembly. The tilt sensor is directly attached to the key stress-bearing parts of the embedded component assembly to monitor verticality and horizontal orientation in real-time. The displacement sensor is deployed at the connection between the inner support frame 7 and the servo scissor support 1 to collect real-time data on the expansion and contraction displacement of the servo scissor support 1 and the local deformation of the embedded component 5. The temperature sensor is embedded inside the concrete and on the surface of the embedded component 5 to collect real-time data on the concrete hydration temperature and ambient temperature, providing data input for shrinkage and creep prediction. Sensor assembly 4 transmits displacement, tilt, deformation, and temperature data to the PLC controller in real-time, synchronously, and without delay, providing high-precision input for closed-loop control.

[0043] Step 2. Perform core calculations:

[0044] The PLC controller is the core of the entire system. It can simultaneously achieve dual-parameter output of force and displacement and closed-loop regulation, and automatically complete the entire process of data comparison, model calculation and instruction output.

[0045] Step 2.1 Perform precise force-displacement dual-mode conversion:

[0046] The PLC controller establishes a precise conversion relationship between force control mode and position control mode based on Hooke's law and mechanical transmission ratio, realizing real-time conversion between output force and adjustable displacement. The conversion formula is: S=F / (K×η).

[0047] In the formula: S is the adjustment displacement of the servo scissor lift support 1 (mm); F is the output force of the servo scissor lift support 1 (N); K is the combined stiffness of the inner support frame and the pre-embedded part assembly (N / mm); η is the mechanical transmission efficiency, in this embodiment, η≥95%.

[0048] Step 2.2 Construct the concrete hydration heat release model, concrete creep deformation model, and concrete shrinkage deformation model:

[0049] The PLC controller incorporates hydration heat release models, shrinkage models, and creep models to accurately predict the deformation of concrete throughout its entire lifecycle.

[0050] 1) The Arrhenius model, a heat release model for concrete hydration, is used to describe the relationship between hydration rate and temperature, and to predict temperature development patterns.

[0051] dα / dt=A×exp(-E / (RT))×(1-α)n ;

[0052] In the formula: α is the degree of hydration of concrete; A is the prefactor; E is the activation energy of hydration reaction (J / mol); R is the gas constant (8.314J / (mol·K)); T is the absolute temperature of concrete (K); n is the hydration reaction order; exp() represents the exponential function.

[0053] 2) The concrete creep deformation model (B3 model) is used to calculate the offset of embedded parts caused by concrete creep under long-term loads:

[0054] εc(t,τ)=ε0×C(t-τ);

[0055] In the formula: εc(t,τ) is the creep strain; ε0 is the initial stress strain of the embedded part; C(t-τ) is the creep coefficient; t is the concrete age (d); τ is the load application age (d).

[0056] 3) The concrete shrinkage deformation model (power function model) is used to calculate the deformation caused by concrete hardening shrinkage:

[0057] εs(t)=εs∞×(1-exp(-kt));

[0058] In the formula: εs(t) is the shrinkage strain of concrete at age t; εs∞ is the ultimate shrinkage strain of concrete; k is the shrinkage rate constant.

[0059] Step 2.3 Construct the feedforward-feedback composite control logic:

[0060] The PLC controller employs a composite control algorithm that combines feedforward pre-compensation with feedback real-time correction.

[0061] The real-time feedback correction control is as follows: it receives deformation data collected by sensor component 4 in real time and compares it with preset accuracy thresholds (flatness ≤ 2mm, perpendicularity ≤ 0.1°). When the deformation rate is > 0.1mm / h, it immediately outputs a correction command.

[0062] The feedforward pre-compensation is based on the above concrete hydration heat release model, concrete creep deformation model and concrete shrinkage deformation model. A compensation force is applied 0.5-2 hours before deformation occurs to suppress deformation from the source. The pre-compensation time window is dynamically matched, that is, 0.5-1h in the flow stage and 1-2h in the plastic stage, which is completely adapted to the phase transformation characteristics of concrete.

[0063] Step 3. Execution output:

[0064] The PLC controller converts the calculated compensation force and compensation displacement into control commands and sends them to the servo drivers, which in turn drive the first drive motor 15, the second drive motor 26, and the drive motors of the two side scissor supports 31. The first drive motor 15 drives the gear pair consisting of the self-locking trapezoidal lead screw 14, the large gear 17, and the small gear 18 to control the servo scissor support 1 to complete lifting and supporting. The second drive motor 26 drives the three-link scissor 2 to move in conjunction with the servo scissor support 1 for synchronous compensation. The drive motors of the two side scissor supports 31 drive the gear pairs consisting of the self-locking trapezoidal lead screws, the large gears, and the small gears to control the two side scissor supports 31 to complete horizontal compensation. The first drive motor 15, the second drive motor 26, and the drive motors of the two side scissor supports 31 work together to output precise displacement and pushing force, which in real time counteracts the deformation of the embedded parts 5 caused by pouring, vibration, shrinkage, and creep, and relies on their respective self-locking trapezoidal lead screws to achieve self-locking when power is cut off, maintaining a stable posture.

[0065] like Figure 7 As shown, the installation method of the active compensation embedded part for casting in nuclear fusion devices according to the present invention is implemented according to the process of positioning installation, pre-tightening calibration, staged compensation, layered casting, and demolding and turnover. The specific steps are as follows:

[0066] Positioning of S1 Embedded Part Assembly and Installation of Internal Support Frame:

[0067] Clean the foundation construction surface of the Dewar window of the nuclear fusion device, and lay out the baseline, elevation and center position of the embedded parts installation; hoist the embedded parts 5 to the baseline position to complete the rough positioning, and control the plane error within ±5mm; send the modular inner support frame into the internal cavity of the embedded parts assembly, assemble and fix it, and install the crossbeam rod 3 and servo scissor support 1 in sequence on the adjustment points of the inner support frame 7 to ensure that the servo scissor support 1 and the crossbeam rod 3 are tightly fitted with the inner wall of the inner support frame; set the three-link scissor 2 between the adjacent crossbeam rods 3 and align it with the servo scissor support 1.

[0068] S2 applies the initial preload and calibrates the initial posture of the embedded part:

[0069] The control system is activated, switching the servo scissor lift support 1, the three-link scissor lift 2, and the two side scissor lift supports 31 to the force mode. An initial preload of 500N to 800N is applied synchronously to all adjustment points, so that the embedded part 5 forms a stable whole with the servo scissor lift support 1, the three-link scissor lift 2, and the crossbeam 3. The sensor assembly 4 collects the initial attitude data of the embedded part 5, and the PLC controller automatically calculates the deviation and drives the servo scissor lift support 1, the three-link scissor lift 2, and the two side scissor lift supports 31 to make fine adjustments, calibrating the flatness of the embedded part 5 to ≤1mm and the verticality to ≤0.05°, achieving the designed initial attitude. The initial parameters are locked as the subsequent compensation benchmark.

[0070] S3 Start-up Control System: Dynamic Monitoring and Pre-compensation During Phase Change Stages

[0071] The entire concrete pouring process is under closed-loop control, operating in different modes according to the concrete phase transformation stages:

[0072] Flow stage (0-2h after pouring): The concrete is in a fluid state, with the lateral pressure and vibration impact force at their maximum. The active compensation embedded part installation system 6 enters the lateral pressure balance mode. The servo scissor support 1, the three-link scissor 2, and the two-sided scissor support 31 output the top thrust in the opposite direction to offset the deflection deformation caused by the static pressure and vibration of the concrete in real time.

[0073] Plastic stage (2-6 hours before initial setting): Concrete loses its fluidity and begins to shrink. The system switches to shrinkage compensation mode and predicts the amount of shrinkage based on temperature sensor data and concrete hydration heat release model, and applies pre-compensation force in advance.

[0074] Curing stage (from final setting to reaching the required strength): The concrete gradually hardens, shrinkage and creep continue, the system switches to stress retention mode, maintains constant preload, and locks the position of the embedded part 5.

[0075] S4 performs dynamic adjustment based on deformation rate threshold, with layered casting and layered compensation:

[0076] For embedded parts with a concrete thickness greater than 500mm, a three-layer pouring method is adopted, combined with dynamic compensation:

[0077] First pour: Pour to 50mm below the bottom surface of the embedded part, and allow to cure naturally for 12 hours to form a stable foundation support;

[0078] Second pouring: Pour the main body of the embedded part, start full power dynamic compensation, increase the sampling frequency of each sensor to 1Hz, and the servo scissor support 1, three-link scissor 2, and two-side scissor support 31 respond to deformation in real time;

[0079] Third pouring: Pour to the design elevation. After pouring, release the compensation force gradually according to the gradient to avoid the premature rebound of the embedded parts caused by sudden stress changes.

[0080] Throughout the process, the PLC controller uses a deformation rate > 0.1 mm / h as the compensation trigger condition and calculates the compensation displacement accurately according to the formula to ensure that the flatness of the embedded parts is always ≤ 2 mm.

[0081] S5 removes the internal support fixtures (i.e., pours the active compensation embedded part installation system) to complete the construction:

[0082] After the concrete has cured to 100% of its design strength, the control system is shut down, and the preload of the servo scissor lift support 1, the three-link scissor lift 2, and the two side scissor lift supports 31 is gradually released. The servo scissor lift support 1, the three-link scissor lift 2, and the crossbeam 3 are disassembled in sequence. The inner support frame 7 is disassembled and taken out through the Dewar window. After cleaning and maintenance, it can be reused. The flatness and verticality of the embedded parts 5 are re-measured, and they all meet the installation accuracy requirements of the nuclear fusion device, thus completing all construction work.

[0083] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A casting-based active compensation embedded component installation system for nuclear fusion devices, characterized in that, The system includes an internal support frame, multiple servo scissor lift supports, at least one three-bar scissor lift, a crossbeam, a control system, and sensor components. The internal support frame is a modular and detachable structure with multiple adjustment points on its inner wall. Multiple modular and detachable structures are attached to the inner wall of the assembled embedded part. The servo scissor lift supports are installed at preset adjustment points on the inner wall of the internal support frame, with their tops supporting the inner wall of the internal support frame. The three-bar scissor lift is positioned between adjacent crossbeams, with the crossbeams laterally supporting the adjustment points on the inner wall of the internal support frame. The bases of the servo scissor lift supports and the mounting seats of the three-bar scissor lift are both fixed to the crossbeams and aligned. The sensor components are used to monitor the attitude and deformation data of the embedded part in real time. The PLC controller of the control system connects to the sensor components, the first drive motor of the servo scissor lift support, the second drive motor of the three-bar scissor lift, and the drive motors of the scissor lift supports on both sides of the crossbeam, adjusting the horizontal and vertical deformation in real time to achieve dynamic deformation compensation throughout the entire process of embedded part casting. The servo scissor lift support includes a top plate, an upper and lower scissor lift plate that are hinged together, a self-locking trapezoidal lead screw, a first drive motor, a large gear, a small gear, and a base. The three-bar scissor lift includes an upper double-sided scissor lift, a lower scissor lift, a servo-driven scissor lift, a hinge base, a mounting base, and a second drive motor.

2. The active compensation type embedded component installation system for nuclear fusion devices according to claim 1, characterized in that, The top plate is connected to the top of the upper scissor plate and is used to support the inner wall of the inner support frame; the base is connected to the bottom of the lower scissor plate; the self-locking trapezoidal screw passes through the gap between the upper and lower scissor plates and is threadedly engaged with the upper and lower scissor plates; the first drive motor is connected to the self-locking trapezoidal screw through a large gear and a small gear, and is used to drive the self-locking trapezoidal screw to rotate in order to adjust the lifting and lowering of the servo scissor support.

3. A casting-based active compensation embedded component installation system for nuclear fusion devices according to claim 1 or 2, characterized in that, The upper double-sided scissor lift rods and the lower scissor lift rods are connected by a hinged joint to form a three-bar linkage structure; the servo-driven scissor lift rods are independently driven by a second drive motor and connected to the hinged joint; the mounting base is set on the hinged joint at one end fixed to the crossbeam rod.

4. The active compensation type embedded component installation system for nuclear fusion devices according to claim 1, characterized in that, The crossbeam includes a telescopic rod and scissor supports symmetrically arranged at both ends of the telescopic rod.

5. The active compensation type embedded component installation system for casting in a nuclear fusion device according to claim 1, characterized in that, The sensor assembly integrates a laser rangefinder, tilt sensor, displacement sensor, and temperature sensor.

6. The casting active compensation type embedded component installation system for nuclear fusion devices according to claim 1, characterized in that, There are 12 adjustment points evenly distributed on the internal support frame.

7. The active compensation type embedded component installation system for casting in a nuclear fusion device according to claim 1, characterized in that, The number of adjustment points evenly distributed on the internal support frame is 8 to 16.

8. A method for installing cast-in-place active compensation embedded parts for nuclear fusion devices, employing the cast-in-place active compensation embedded part installation system for nuclear fusion devices as described in any one of claims 1-7, characterized in that... Includes the following steps: S1. Hoist the assembled embedded parts to the reference position of the Dewar window for rough positioning, and send the inner support frame into the internal cavity of the embedded parts for splicing and fixing. S2. Install the servo scissor lift support and crossbeam in sequence on the adjustment points of the inner support frame, install the three-bar scissor lift between adjacent crossbeams, and start the control system to apply the initial preload to all adjustment points synchronously to calibrate the initial posture of the embedded parts. S3. Activate the control system. During the entire concrete pouring process, based on the data collected in real time by the sensor components, dynamically monitor and pre-compensate the deformation of the embedded parts according to the concrete phase transformation stage. S4. For embedded parts areas with concrete thickness greater than 500mm, a layered pouring method is adopted. Dynamic compensation is activated after each layer is poured, and the compensation force is gradually released according to the gradient after the final pouring is completed. S5. After the concrete has cured to the design strength, shut down the control system, gradually release the pre-tightening force, and disassemble the active compensation embedded part installation system.

9. The method for installing a cast-in-place active compensation embedded component for a nuclear fusion device according to claim 8, characterized in that, In S3, the dynamic monitoring and pre-compensation based on the concrete phase transformation stage specifically includes: in the flow stage, controlling the servo scissor supports, the three-link scissor supports, and the scissor supports on both sides of the crossbeam to output the jacking force in the opposite direction to counteract the deflection deformation caused by concrete static pressure and vibration; in the plastic stage, predicting the shrinkage amount based on temperature data and the concrete hydration heat release model and applying the pre-compensation force in advance; and in the curing stage, maintaining a constant pre-tightening force to lock the posture of the embedded parts.

10. The method for installing a cast-in-place active compensation embedded component for a nuclear fusion device according to claim 8, characterized in that, In S4, for embedded parts with a concrete thickness greater than 500mm, a three-layer pouring method is adopted, combined with dynamic compensation: The first pouring is to pour to 50mm below the bottom surface of the embedded part, and allow it to cure naturally for 12 hours to form a stable foundation support. The second pouring is as follows: pouring the main body of the embedded parts, starting full-power dynamic compensation, increasing the sampling frequency of each sensor component to 1Hz, and the servo scissor support, the three-link scissor, and the scissor supports on both sides of the crossbeam rod respond to deformation in real time; The third pouring is as follows: pour to the design elevation, and after pouring, release the compensation force gradually in a gradient. Throughout the process, the PLC controller of the control system uses a deformation rate > 0.1 mm / h as the compensation trigger condition to ensure that the flatness of the embedded parts is always ≤ 2 mm.

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