Hollow reactor winding arranging and stretching device and system thereof

Abstract

The application provides a hollow reactor winding line stretching device and a system thereof, and relates to the field of reactors. The hollow reactor winding line stretching device comprises an outer layer stretching arm, a lower end of which is fixedly provided with a support seat, the support seat is arranged on an equipment base through a position adjusting device; a middle layer stretching arm is slidingly sleeved in the outer layer stretching arm, the middle layer stretching arm is driven by lifting device one to slide along the outer layer stretching arm in the axial direction of the outer layer stretching arm; an inner layer stretching arm is slidingly sleeved in the middle layer stretching arm, the inner layer stretching arm is driven by lifting device two to slide along the middle layer stretching arm in the axial direction of the middle layer stretching arm; a control device is electrically connected with the lifting device one, the lifting device two and the position adjusting device; different specifications of rectangular square tubes are matched to complete multi-range stretching, and multiple diameter products can be compatible with winding.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric reactors, in particular to a hollow reactor winding stretching device and system thereof. BACKGROUND

[0002] In the production of hollow reactor winding, the precise control of the winding line plays a key role in product quality. With the increasing performance requirements of the power industry for hollow reactors, the winding process needs to achieve more precise line operation, which poses a severe challenge to the performance of the winding line device.

[0003] At present, the conventional winding line device is of fixed length, and in actual application, it is difficult to flexibly adjust the stretching stroke when facing the complex spatial layout and fine line demand of the hollow reactor winding. SUMMARY

[0004] The present application provides a hollow reactor winding stretching device and system to solve the technical problems raised in the background art.

[0005] To solve the above technical problems, the present application discloses a hollow reactor winding stretching device, comprising:

[0006] An outer telescopic arm is fixedly provided with a support seat at the lower end, and the support seat is provided on the equipment base through a position adjusting device;

[0007] An intermediate telescopic arm is slidingly sleeved inside the outer telescopic arm, and the intermediate telescopic arm is driven by a lifting device one to slide axially in the outer telescopic arm;

[0008] An inner telescopic arm is slidingly sleeved inside the intermediate telescopic arm, and the inner telescopic arm is driven by a lifting device two to slide axially in the intermediate telescopic arm;

[0009] A control device is electrically connected with the lifting device one, the lifting device two and the position adjusting device.

[0010] Preferably, anti-locking design structures are added between the outer telescopic arm and the intermediate telescopic arm, and between the intermediate telescopic arm and the inner telescopic arm, and the telescopic arm is a rectangular square tube.

[0011] Preferably, the anti-locking design structure comprises a ball guide structure.

[0012] Preferably, the position adjusting device is any one of a horizontal rotating device, a one-dimensional translation device and a two-dimensional translation device.

[0013] Preferably, the lifting device one and the lifting device two are any one of a lead screw lifting assembly and a pneumatic lifting assembly.

[0014] Preferably, it also includes:

[0015] The monitoring module includes:

[0016] Strain detection unit: strain sensors are attached to the key strain areas on the surface of the telescopic arm;

[0017] Temperature sensor: for detecting the temperature of the key strain areas on the surface of the telescopic arm;

[0018] Displacement sensor: displacement sensors are arranged on the intermediate telescopic arm and the inner telescopic arm, and the displacement sensors are used to detect the displacement of the corresponding telescopic arm;

[0019] Speed sensor: speed sensors are arranged on the intermediate telescopic arm and the inner telescopic arm, and the speed sensors are used to detect the telescopic speed of the corresponding telescopic arm;

[0020] Inclination sensor: for detecting the inclination of the telescopic arm;

[0021] Six-dimensional force sensor: installed on the telescopic arm in contact with the wire, used to sense the contact force and torque during winding, and output a six-dimensional force vector ; 、 、 are respectively 、 、 directional contact forces; 、 、 are respectively 、 、 directional contact torques;

[0022] Strain correction module: for determining the equivalent strain of each key strain area based on the temperature sensor detection value and the strain gradient of the key strain area on the surface of the telescopic arm;

[0023] Alarm module: for alarming when the equivalent strain of any key strain area is not within the corresponding strain allowable range.

[0024] Preferably, it also includes:

[0025] State determination module: combined with the monitoring module to determine the state parameters of the telescopic arm;

[0026] Display module: for displaying the state parameters of the telescopic arm;

[0027] The state determination module includes:

[0028] Data preprocessing unit: for cleaning and time aligning the original data output by the monitoring module;

[0029] Outer telescopic arm state calculation unit: Obtain the average value of strain in the key strain region of each surface of the outer telescopic arm and the gradient of strain in the key strain region of the surface of the outer telescopic arm to obtain the bending state coefficient, and combine the bending state coefficient and the tilt sensor detection data of the outer telescopic arm to obtain the equivalent support length of the outer telescopic arm.

[0030] Intermediate telescopic arm state calculation unit: Combines the equivalent support length of the outer telescopic arm and the speed sensor detection data of the intermediate telescopic arm to determine the equivalent displacement of the intermediate telescopic arm;

[0031] Inner telescopic arm state calculation unit: The equivalent displacement of the inner telescopic arm is determined by combining the equivalent displacement of the intermediate telescopic arm and the six-dimensional force vector of the inner telescopic arm.

[0032] Preferably, the equivalent strain in the key strain region is calculated based on the following formula:

[0033] ;

[0034] Equivalent strain in the current key strain region; This represents the average detection value of the strain sensor in the current critical strain region; This represents the maximum detection value of the strain sensor in the current critical strain region. This represents the minimum detection value of the strain sensor in the current critical strain region. This is the correction factor for the strain gradient on the equivalent strain; The coefficient of linear expansion in the current critical strain region; This is the correction factor for the equivalent strain caused by the temperature expansion state of the strain region; This refers to the temperature sensor readings in the current critical strain region. This is a reference temperature.

[0035] Preferably, the outer telescopic arm state calculation unit is calculated based on the following formula:

[0036] The outer telescopic arm state calculation unit is based on the following formula:

[0037] ;

[0038] Where L is the equivalent support length of the outer telescopic arm; It is the arithmetic mean of the average strain in the critical strain region of each surface of the outer telescopic arm; The strain gradient in the critical strain region of the outer telescopic arm surface; This is the average strain correction factor; This is the strain gradient correction factor; This is the original length of the outer telescopic arm; The tilt sensor data is from the outer telescopic arm. The strain sensor readings are for the critical stress region at the top of the outer telescopic arm. 'r' represents the strain sensor reading of the critical stress region at the bottom of the outer telescopic arm; 'r' represents the vertical distance between the center of the critical stress region at the top of the outer telescopic arm and the center of the critical stress region at the bottom of the outer telescopic arm.

[0039] The intermediate telescopic arm state calculation unit is based on the following formula:

[0040] ;

[0041] Where D is the equivalent displacement of the intermediate telescopic arm (2); d is the displacement sensor detection value of the intermediate telescopic arm (2); The speed sensor reading of the intermediate telescopic arm (2) is the value detected by the speed sensor. The strain sensor readings for the critical stress region at the top of the middle telescopic arm; R represents the strain sensor reading of the critical stress region at the bottom of the intermediate telescopic arm; R is the vertical distance between the center of the critical stress region at the top of the intermediate telescopic arm and the center of the critical stress region at the bottom of the intermediate telescopic arm. This is the gradient correction factor for the displacement; Unit of time; This is the compensation coefficient.

[0042] The present invention also discloses a hollow reactor winding system, including the aforementioned hollow reactor winding telescopic device.

[0043] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0044] This invention employs a three-tiered telescopic arm nested structure (outer, middle, and inner layers) combined with an anti-jamming ball bearing guide design to improve telescopic smoothness. The position adjustment device supports multi-dimensional adjustment to adapt to different winding direction requirements. The lifting drive can be either a lead screw or a pneumatic component, with the control device working in tandem to achieve precise drive. Limit protection is provided to prevent structural damage. Utilizing rectangular and square tubes of different specifications, it achieves multi-range telescopic movement, is compatible with winding products of various diameters, effectively optimizing the smoothness, adaptability, accuracy, and product compatibility of winding operations, reducing the risk of failure, and meeting the diverse needs of reactor winding. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of the present invention.

[0047] In the diagram: 1. Outer telescopic arm; 2. Middle telescopic arm; 3. Inner telescopic arm; 4. Support base. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0049] This invention provides a telescopic device for the winding of a hollow reactor, such as... Figure 1 As shown, it includes:

[0050] An outer telescopic arm 1, with a support base 4 fixedly installed at the lower end of the outer telescopic arm 1, and the support base 4 is mounted on the equipment base via a position adjustment device;

[0051] The intermediate telescopic arm 2 is slidably sleeved inside the outer telescopic arm 1. The intermediate telescopic arm 2 is driven by a lifting device to slide along the axial direction of the outer telescopic arm 1 inside the outer telescopic arm 1.

[0052] The inner telescopic arm 3 is slidably sleeved inside the middle telescopic arm 2. The inner telescopic arm 3 is driven by the lifting device 2 to slide along the axial direction of the middle telescopic arm 2.

[0053] The control device is electrically connected to the lifting device one, the lifting device two, and the position adjustment device.

[0054] Among them, an anti-jamming design structure is added between the outer telescopic arm 1 and the middle telescopic arm 2, and between the middle telescopic arm 2 and the inner telescopic arm 3.

[0055] The anti-jamming design includes a ball guide structure to prevent jamming caused by friction.

[0056] The position adjustment device can be any one of a horizontal rotation device, a one-dimensional translation device, or a two-dimensional translation device, to adapt to the winding requirements in different directions.

[0057] The lifting device one and the lifting device two are either a screw lifting assembly or a pneumatic lifting assembly.

[0058] The present invention may also include limit switches or sensors to prevent structural damage caused by excessive stretching or compression.

[0059] By using three different sizes of rectangular square tubes in combination, the telescopic arm of this invention can be extended from 1.5 meters to 3 meters. The telescopic arm can be wound with products of various diameters. The outer telescopic arm 1 can be a 60*60*4 rectangular square tube of 1.5 meters, the middle telescopic arm 2 can be a 50*50*4 rectangular square tube of 1.2 meters, and the inner telescopic arm 3 can be a 40*40*4 rectangular square tube of 0.8 meters. The extension and contraction are combined to achieve the length change.

[0060] The beneficial effects of the above technical solution are as follows:

[0061] This invention employs a three-tiered telescopic arm nested structure (outer, middle, and inner layers) combined with an anti-jamming ball bearing guide design to improve telescopic smoothness. The position adjustment device supports multi-dimensional adjustment to adapt to different winding direction requirements. The lifting drive can be either a lead screw or a pneumatic component, with the control device working in tandem to achieve precise drive. Limit protection is provided to prevent structural damage. Utilizing rectangular and square tubes of different specifications, it achieves multi-range telescopic movement, is compatible with winding products of various diameters, effectively optimizing the smoothness, adaptability, accuracy, and product compatibility of winding operations, reducing the risk of failure, and meeting the diverse needs of reactor winding.

[0062] Example 2, based on Example 1, further includes the following:

[0063] The monitoring module includes:

[0064] Strain detection unit: Employs strain sensors, which are attached to key strain areas on the surface of the telescopic arm;

[0065] Temperature sensor: used to detect the temperature in key strain areas on the surface of the telescopic boom;

[0066] Displacement sensors: Displacement sensors are installed on both the intermediate telescopic arm 2 and the inner telescopic arm 3. The displacement sensors are used to detect the displacement of the corresponding telescopic arm.

[0067] Speed ​​sensors: Speed ​​sensors are installed on both the middle telescopic arm 2 and the inner telescopic arm 3. The speed sensors are used to detect the telescopic speed of the corresponding telescopic arm.

[0068] Tilt sensor: Used to detect the tilt angle of the telescopic boom (the angle between the actual telescopic direction and the ideal telescopic direction).

[0069] Six-dimensional force sensor: Installed on the telescopic arm that contacts the winding wire, it is used to sense the contact force and torque during the winding process and output a six-dimensional force vector. ; , , They are respectively , , Contact force in direction; , , They are respectively , , Contact torque in the direction;

[0070] Strain correction module: used to determine the equivalent strain of each key strain region based on the temperature sensor readings and the strain gradient of the key strain regions on the surface of the telescopic arm;

[0071] Alarm module: Used to issue an alarm when the equivalent strain in any critical strain region is outside the corresponding allowable strain range.

[0072] The equivalent strain in the critical strain region is calculated based on the following formula:

[0073] ;

[0074] The equivalent strain of the current key strain region; This represents the average detection value of the strain sensor in the current critical strain region; This represents the maximum detection value of the strain sensor in the current critical strain region. This represents the minimum detection value of the strain sensor in the current critical strain region. This is the correction factor for the strain gradient on the equivalent strain; The coefficient of linear expansion in the current critical strain region; The correction factor for the equivalent strain caused by the temperature expansion state in the strain region (experimental calibration (determined in conjunction with material and usage environment)). This refers to the temperature sensor readings in the current critical strain region. This is a reference temperature (generally taken as 20℃). , Through tensile / thermal simulation experiments, under known strain gradient and temperature change conditions, the error between the strain detection values ​​before and after correction and the actual physical strain is compared, and the correction coefficient is obtained by backfitting.

[0075] The beneficial effects of the above scheme are as follows:

[0076] By using strain, temperature, displacement, velocity, tilt angle, and six-dimensional force sensors, comprehensive data on the mechanical, motion, and environmental aspects of the telescopic arm are collected, covering key parameters such as force, deformation, attitude, and temperature during the winding process, providing data support for precise control and health monitoring.

[0077] The strain correction module combines temperature and strain gradient to eliminate the influence of ambient temperature and uneven strain distribution on the detection, improve the accuracy of strain detection, and ensure accurate judgment of the health status of the telescopic arm structure.

[0078] The alarm module sets a threshold based on the corrected equivalent strain, monitors structural safety in real time, prevents damage to the telescopic arm caused by overstrain, reduces the risk of equipment failure, and improves the reliability and lifespan of the device.

[0079] Example 3, based on Example 2, further includes:

[0080] Status determination module: Combines with the monitoring module to determine the status parameters of the telescopic boom;

[0081] Display module: Used to display the status parameters of the telescopic arm;

[0082] The status determination module includes:

[0083] Data preprocessing unit: Cleans and aligns the raw data output by the monitoring module;

[0084] The outer telescopic arm 1 state calculation unit: obtains the average value of the strain in the key strain region of each surface of the outer telescopic arm 1 and the gradient of the strain in the key strain region of the surface of the outer telescopic arm 1 to obtain the bending state coefficient, and combines the bending state coefficient and the tilt sensor detection data of the outer telescopic arm 1 to obtain the equivalent support length of the outer telescopic arm 1.

[0085] Intermediate telescopic arm 2 state calculation unit: Combines the equivalent support length of the outer telescopic arm 1 and the speed sensor detection data of the intermediate telescopic arm 2 to determine the equivalent displacement of the intermediate telescopic arm 2;

[0086] The inner telescopic arm 3 state calculation unit: combined with the equivalent displacement of the intermediate telescopic arm 2 and the six-dimensional force vector of the inner telescopic arm 3, the equivalent displacement of the inner telescopic arm 3 is determined.

[0087] The outer telescopic arm 1 state solution unit is calculated based on the following formula:

[0088] ;

[0089] Where L is the equivalent support length of the outer telescopic arm 1; It is the arithmetic mean of the average strain in the critical strain region of each surface of the outer telescopic arm 1; The strain gradient in the critical strain region of the outer telescopic arm surface; This is the average strain correction factor (experimentally calibrated (determined based on the outer arm material and structure)). This is the strain gradient correction coefficient (experimental calibration (in conjunction with strain distribution characteristics)). This is the original length of the outer telescopic arm 1; The tilt sensor data for the outer telescopic arm 1; The strain sensor readings for the critical stress region at the top of the outer telescopic arm 1; , r is the strain sensor reading of the critical stress region at the bottom of the outer telescopic arm 1; r is the vertical distance between the center of the critical stress region at the top of the outer telescopic arm 1 and the center of the critical stress region at the bottom of the outer telescopic arm 1.

[0090] The intermediate telescopic arm 2-state solution unit is calculated based on the following formula:

[0091] ;

[0092] Where D is the equivalent displacement of the intermediate telescopic arm 2; d is the displacement sensor detection value of the intermediate telescopic arm 2; The speed sensor reading of the intermediate telescopic arm 2; The strain sensor readings for the critical stress region at the top of the middle telescopic arm 2; R is the strain sensor reading of the lowest critical stress region of the intermediate telescopic arm 2; R is the vertical distance between the center of the highest critical stress region of the intermediate telescopic arm 2 and the center of the lowest critical stress region of the intermediate telescopic arm 2. This is the gradient correction factor for displacement (experimentally calibrated (based on the motion-deformation characteristics of the intermediate arm); the value is greater than 0 and less than 0.5). Unit of time; The compensation coefficient (a compensation coefficient for the displacement sensor reading d of the intermediate telescopic arm, mainly used to correct the deviation between the displacement sensor reading and the actual equivalent displacement; it can be based on experimental calibration; the value is 0.9 - 1.1).

[0093] The inner telescopic arm 3-state solution unit is calculated based on the following formula:

[0094] ;

[0095] Where B is the equivalent displacement of the inner telescopic arm 3; The displacement sensor reading of the inner telescopic arm 3; The tilt sensor data for the intermediate telescopic arm 2; F is the displacement correction coefficient (experimental calibration; used to adjust the accuracy of the "displacement sensor detection value S"); G is the six-dimensional force vector; G is the simplified stiffness matrix (structural design parameters (obtained through finite element analysis / experimental testing)). The speed sensor reading of the inner telescopic arm 3; This is the correction coefficient of the force vector to the displacement (experimental calibration (combined with the coupling characteristics of the winding force-displacement)).

[0096] The stiffness matrix G describes the force-deformation relationship of the inner telescopic arm 3, that is, the amount of deformation produced by the telescopic arm when a unit force is applied (deformation = force × inverse stiffness matrix). For a rectangular tube nested structure (such as the inner arm in the invention), the stiffness matrix is ​​simplified to a 3×3 matrix (only the main direction stiffness is retained, and cross-coupling terms are ignored), in the following form:

[0097] ;

[0098] Stiffness along the extension / retraction direction of the telescopic arm;

[0099] Stiffness in the left and right directions along the radial direction perpendicular to the extension / retraction direction of the telescopic arm;

[0100] Stiffness in the radial direction perpendicular to the extension / retraction direction of the telescopic arm;

[0101] The beneficial effects of the above technical solution are as follows:

[0102] By combining the "monitoring module + state determination module", multi-source data such as strain, displacement, velocity, tilt angle and six-dimensional force are integrated to calculate the state of the telescopic arm step by step from the outer layer to the inner layer, covering key parameters such as bending, support and displacement, so as to achieve accurate quantification of the telescopic arm state during the winding process and provide a comprehensive basis for control and fault early warning.

[0103] The formula design incorporates correction terms such as "strain gradient, temperature, and force-displacement coupling" to eliminate the influence of sensor errors, structural nonlinear deformation, and environmental interference on the state calculation, improve the calculation accuracy of parameters such as outer support length and intermediate / inner layer displacement, and ensure the accuracy of device operation control.

[0104] The algorithm adopts a layered solution logic of "outer layer → middle layer → inner layer", which fits the physical characteristics of the telescopic arm nested structure. It uses the state data of the upper arm to support the solution of the lower arm, reduces the solution difficulty of complex structures, is suitable for engineering implementation, and facilitates sensor layout and algorithm deployment.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A winding stretching device for a hollow reactor, characterized in that, The utility model relates to a telescopic arm control system, including: outer layer telescopic arm (1), the outer layer telescopic arm (1) lower end fixedly arranged support seat (4), the support seat (4) is set up on the equipment base through position adjusting device; Middle telescopic arm (2), middle telescopic arm (2) sliding sleeve is connected in the outer layer telescopic arm (1) inside, and the middle telescopic arm (2) is driven in the outer layer telescopic arm (1) by lifting device one and slides along the outer layer telescopic arm (1) axial; Inner layer telescopic arm (3), inner layer telescopic arm (3) sliding sleeve is connected in the middle telescopic arm (2) inside, and the inner layer telescopic arm (3) is driven in the middle telescopic arm (2) by lifting device two and slides along the middle telescopic arm (2) axial; Control device, the control device is electrically connected with lifting device one, lifting device two, position adjusting device; Monitoring module, monitoring module includes: Strain detection unit: adopt strain sensor, paste in the key strain area of telescopic arm surface; Temperature sensor: for detecting the temperature of key strain area on the surface of telescopic arm; Displacement sensor: the displacement sensor is arranged on the middle telescopic arm (2) and inner layer telescopic arm (3), and the displacement sensor is used for detecting the displacement of corresponding telescopic arm; Speed sensor: the speed sensor is arranged on the middle telescopic arm (2) and inner layer telescopic arm (3), and the speed sensor is used for detecting the telescopic speed of corresponding telescopic arm; Inclination sensor: for detecting the inclination of telescopic arm; Six-dimensional force sensor: mounted on the telescopic arm in contact with the wire, used to sense the contact force, torque in the winding process, output six-dimensional force vector ; 、 、 respectively 、 、 direction of the contact force; 、 、 respectively 、 、 direction of the contact torque; Strain correction module: for determining the equivalent strain of each key strain area based on the detection value of temperature sensor and the strain gradient of the key strain area on the surface of telescopic arm; Alarm module: for alarming when the equivalent strain of any key strain area is not in the corresponding strain allowable range; State determination module: the state parameter of telescopic arm is determined in combination with monitoring module; Display module: for displaying the state parameter of telescopic arm; State determination module includes: Data preprocessing unit: the original data outputted by monitoring module is cleaned, time is aligned; Outer layer telescopic arm (1) state calculation unit: obtains the average value of the strain of each surface key strain area of outer layer telescopic arm (1) and the gradient of the strain of the surface key strain area of outer layer telescopic arm (1) to obtain bending state coefficient, and obtains the equivalent support length of outer layer telescopic arm (1) in combination with bending state coefficient, the detection data of inclination sensor of outer layer telescopic arm (1); Middle telescopic arm (2) state solution unit: the equivalent displacement of middle telescopic arm (2) is determined in combination with the equivalent support length of outer layer telescopic arm (1), the speed sensor detection data of middle telescopic arm (2); Inner layer telescopic arm (3) state solution unit: the equivalent displacement of inner layer telescopic arm (3) is determined in combination with the equivalent displacement of middle telescopic arm (2), the six-dimensional force vector of inner layer telescopic arm (3).

2. A winding stretching device for a hollow reactor according to claim 1, characterized in that The anti-lock design structure is increased between the outer layer telescopic arm (1) and the middle telescopic arm (2), and between the middle telescopic arm (2) and the inner layer telescopic arm (3), and the telescopic arm is rectangular square tube.

3. A winding stretching and contracting device for a hollow reactor according to claim 1, wherein The anti-lock design structure includes ball guide structure.

4. A winding stretching and contracting device for a hollow reactor according to claim 1, wherein The position adjusting device is any one of horizontal rotation device, one-dimensional translation device and two-dimensional translation device.

5. A winding stretching device for a hollow reactor according to claim 1, characterized in that, The lifting device one and the lifting device two are any one of a screw lifting assembly and a pneumatic lifting assembly.

6. The winding expansion device of a hollow reactor according to claim 1, characterized in that, The equivalent strain of the key strain region is calculated based on the following formula: ； Equivalent strain of the current critical strain region Average detection value of the strain sensor of the current critical strain region Maximum detection value of the strain sensor of the current critical strain region Minimum detection value of the strain sensor of the current critical strain region Correction coefficient of the strain gradient to the equivalent strain Linear expansion coefficient of the current critical strain region Correction coefficient of the temperature expansion state of the strain region to the equivalent strain Detection value of the temperature sensor of the current critical strain region Reference temperature 7. The winding expansion device of a hollow reactor according to claim 1, characterized in that, The outer layer expansion arm (1) state solving unit is calculated based on the following formula: ； L is the equivalent support length of the outer telescopic arm (1); is the average value of the average value of the strain of each surface key strain region of the outer telescopic arm (1); is the average strain correction coefficient; is the strain gradient correction coefficient; is the original length of the outer telescopic arm (1); is the inclination sensor detection data of the outer telescopic arm (1); is the strain sensor detection value of the uppermost key stress region of the outer telescopic arm (1); is the strain sensor detection value of the lowermost key stress region of the outer telescopic arm (1); R is the vertical distance from the center of the uppermost key stress region of the outer telescopic arm (1) to the center of the lowermost key stress region of the outer telescopic arm (1). The intermediate expansion arm (2) state solving unit is calculated based on the following formula: ； D is an equivalent displacement of the intermediate telescopic arm (2); d is a displacement sensor detection value of the intermediate telescopic arm (2); is a velocity sensor detection value of the intermediate telescopic arm (2); is a strain sensor detection value of the uppermost key stress region of the intermediate telescopic arm (2); is a strain sensor detection value of the lowermost key stress region of the intermediate telescopic arm (2); R is an up-down direction distance from the center of the uppermost key stress region of the intermediate telescopic arm (2) to the center of the lowermost key stress region of the intermediate telescopic arm (2); is a gradient correction coefficient to displacement; is a unit of time; is a compensation coefficient.

8. A system for winding a hollow reactor coil, characterized in that A hollow reactor winding expansion device comprising any one of claims 1-7.

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