Device and method for continuously measuring diameter of fuel rod

Abstract

The invention provides a device and method for continuously measuring the diameter of a fuel rod, and belongs to the technical field of post-irradiation inspection of nuclear fuel circulation, and the method comprises the steps: enabling a support to move relative to a sliding rail assembly so as to adjust the detection point position of a diameter measuring instrument in the axial direction of the fuel rod, and enabling the diameter measuring instrument to move relative to the support so as to adjust the detection height of the diameter measuring instrument, the measurement of different axial positions of the fuel rod is realized; the chuck can clamp the fuel rod placed on the supporting piece, and the chuck drives the fuel rod to rotate so as to realize continuous measurement of different radial positions of the fuel rod, so that the diameter value and the ovality of a detection point are obtained, the detection continuity of the diameter and the ovality of the fuel rod is improved, and the detection efficiency of the diameter and the ovality of the fuel rod is improved; meanwhile, the driving device drives the chuck to rotate so as to drive the fuel rod to rotate, it can be ensured that the fuel rod rotates in place, the rotating accuracy of the fuel rod is improved, and the accuracy of data collection and the corresponding accuracy can be improved.

Description

Technical Field

[0001] This application belongs to the technical field of post-irradiation inspection in the nuclear fuel cycle, and particularly relates to a device and method for continuously measuring the diameter of a fuel rod. Background Art

[0002] The used fuel rod has strong radioactivity and requires remote operation by a manipulator in a hot cell (a shielded laboratory dedicated for high-radioactivity tests and operations) for related post-irradiation inspections. To study the irradiation effect of the fuel rod and obtain the change in the radial dimension of the fuel rod, it is necessary to measure the diameter and ovality of the fuel rod. The existing diameter measurement equipment can only measure the diameter value at a certain point of the fuel rod and cannot continuously measure the diameter and ovality of the fuel rod, resulting in low measurement efficiency. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] To this end, a first aspect of the present invention provides a device for continuously measuring the diameter of a fuel rod.

[0005] A second aspect of the present invention provides a method for continuously measuring the diameter of a fuel rod.

[0006] In view of this, according to the first aspect of the embodiments of the present application, a device for continuously measuring the diameter of a fuel rod is proposed, including: A slide rail assembly; A bracket, which is adjustably arranged on the slide rail assembly and can slide along the length direction of the slide rail assembly; A diameter gauge, which is adjustably arranged on the bracket and can slide along the height direction of the bracket; A support member, which is slidably connected to the slide rail assembly and is used to support the fuel rod; A jaw assembly, which is arranged on the slide rail assembly and is located at the end of the slide rail assembly; the jaw assembly includes a chuck and a driving device, the chuck is used to clamp the fuel rod, and the chuck is in transmission connection with the driving device to drive the chuck to rotate through the driving device.

[0007] In a feasible embodiment, the slide rail assembly includes: A base; Two first slide rails, which are arranged on the base along the length direction of the base; a first slider is slidably connected to the first slide rail, and the bracket is connected to the two first sliders; Two first lead screws, which are rotatably connected to the base, the first lead screws are arranged parallel to the first slide rails, a first nut is threadedly connected to the first lead screw, the first nut is connected to the first slider, and the first nut corresponds to the first slider one by one; The first driving component, which includes a first output end and a second output end. The first output end is connected to one of the first lead screws, and the second output end is connected to the other first lead screw. The first output end and the second output end drive the two first lead screws to rotate synchronously.

[0008] In a feasible implementation, the bracket includes: A gantry, which straddles above the support member. The gantry is perpendicular to the first slide rail and is connected to the two first sliders at the same time; A second slide rail, which is arranged on the gantry along the length direction of the gantry. A second slider is slidably connected to the second slide rail; A second lead screw, which is rotatably connected to the gantry. The second lead screw is arranged parallel to the second slide rail. A second nut is threadedly connected to the second lead screw, and the second nut is connected to the second slider; A second driving component, which is arranged on the gantry. The output shaft of the second driving component is connected to the second lead screw to drive the second lead screw to rotate; A mounting bracket, which is connected to the second slider; A third slide rail, which is arranged on the mounting bracket along the height direction of the gantry. A third slider is slidably connected to the third slide rail, and the diameter measuring instrument is installed on the third slider; A third lead screw, which is rotatably connected to the mounting bracket. The third lead screw is arranged parallel to the third slide rail. A third nut is threadedly connected to the third lead screw, and the third nut is connected to the third slider; A third driving component, which is arranged on the mounting bracket. The output shaft of the third driving component is connected to the third lead screw to drive the third lead screw to rotate.

[0009] In a feasible implementation, the diameter measuring instrument includes: A housing, on the bottom surface of which a relief groove is provided. The relief groove is arranged along the length direction of the slide rail assembly and extends towards the top of the housing to form a detection cavity; Two windows, which are opened on the groove wall of the relief groove and are arranged opposite to each other; A parallel light source, which is arranged in the housing. The parallel light source emits vertical parallel light beams and is located on one side of the detection cavity; A detection camera, which is arranged in the housing and is located on the other side of the detection cavity; A first reflector, which is arranged in the housing. The first reflector is arranged opposite to the parallel light source and reflects the parallel light beam into the window; A second reflector, which is arranged in the housing. The second reflector is arranged opposite to the detection camera and makes the parallel light beam passing through the window enter the detection camera vertically.

[0010] In a feasible implementation manner, the caliper further comprises: Lead glass, lead glass covers the window, and the lead glass is connected to the shell; A lens cover is arranged on the groove wall of the give way groove, and the lens cover is located at one end of the detection cavity close to the parallel light source; A protective plate is arranged on the inner wall of the lens cover.

[0011] In a feasible implementation manner, the fuel rod diameter continuous measurement device further includes: A fourth slide rail, the fourth slide rail is arranged on the slide rail assembly along the length direction of the slide rail assembly, a plurality of fourth sliders are slidably connected to the fourth slide rail, a support member is arranged on the fourth slider, and the support member corresponds to the fourth slider one by one; The support parts include: A mounting seat, the mounting seat is arranged on the fourth sliding block; The support wheel is rotatably arranged on the mounting seat, and the rotation axis of the support wheel is perpendicular to the fourth slide rail; the support wheel is provided with a positioning groove, which is arranged along the circumference of the support wheel, and is used to place the fuel rod.

[0012] In a feasible embodiment, the clamping jaw assembly further includes: A fifth slide rail, which is arranged on the slide rail assembly along the width direction of the slide rail assembly, and a fifth slider is slidably connected to the fifth slide rail; A moving seat, the moving seat is arranged on the fifth sliding block; A sixth slide rail, which is arranged on the moving seat along the height direction of the moving seat, and a sixth sliding block is slidably connected to the sixth slide rail; A fourth lead screw, which is arranged along the height direction of the movable seat, is rotatably connected to the movable seat, a fourth nut is threadedly connected to the fourth lead screw, and the fourth nut is connected to the sixth slider; A fourth drive assembly, the fourth drive assembly is arranged on the moving seat, and an output shaft of the fourth drive assembly is connected to a fourth lead screw to drive the fourth lead screw to rotate; A chuck mounting frame, the chuck mounting frame is arranged on the sixth slider; the chuck is rotatably arranged on the chuck mounting frame, and the chuck is arranged opposite to the support member; The driving device is arranged on the chuck mounting frame, and the driving device drives the chuck to rotate relative to the chuck mounting frame.

[0013] According to a second aspect of an embodiment of the present application, a method for continuously measuring the diameter of a fuel rod is provided, wherein the method uses a fuel rod continuous diameter measuring device according to any of the above technical solutions to perform measurement, including: Lift the caliper to the highest point, place the fuel rod on the support, and clamp the fuel rod with the clamp assembly; Lower the diameter gauge to the first height and move the diameter gauge to the starting detection position. The diameter gauge starts to collect data. Rotate the jaw assembly by a first preset angle, and the diameter gauge collects data again. Move the diameter gauge to the next detection position. Repeat the data collection method at the starting detection position at each detection position until the measurement of the entire fuel rod is completed. Wherein, the first height is the detection height of the diameter gauge.

[0014] In a feasible implementation, the steps of lowering the diameter gauge to the first height and moving the diameter gauge to the starting detection position include: Lower the diameter gauge to the middle position of the height of the fuel rod located at the window. Make the parallel light source emit parallel light beams vertically downward, and after the parallel light beams are reflected, make them enter the diameter gauge vertically upward, and use the reflected parallel light beams to detect the fuel rod.

[0015] In a feasible implementation, Set the step distance of the diameter gauge to be equal to the width of the parallel light beam.

[0016] Compared with the prior art, a fuel rod diameter continuous measurement device and method of the present application have the following beneficial effects: The fuel rod diameter continuous measurement device provided by the embodiment of the present application includes a slide rail assembly, a bracket, a diameter gauge, a support member and a jaw assembly. The fuel rod is placed on the support member, and the support member supports the fuel rod. The diameter gauge is slidably arranged on the bracket, and the bracket is slidably arranged on the slide rail assembly. By moving the bracket relative to the slide rail assembly, the detection position of the diameter gauge in the axial direction of the fuel rod can be adjusted. By moving the diameter gauge relative to the bracket, the detection height of the diameter gauge can be adjusted, thereby improving the convenience of the diameter gauge for detecting the diameter of the fuel rod and realizing the measurement of different positions in the axial direction of the fuel rod. The jaw assembly is arranged at one end of the support member, and the chuck can clamp the fuel rod placed on the support member. The driving device drives the chuck to rotate, and then drives the fuel rod to rotate through the chuck, so as to realize the continuous measurement of the diameter of the fuel rod at the same detection position, that is, to realize the continuous measurement of different positions in the radial direction of the fuel rod, and then obtain the diameter value and ovality of the detection position, improve the continuity of the fuel rod diameter and ovality detection, and improve the detection efficiency of the fuel rod diameter and ovality. At the same time, the driving device drives the chuck to rotate to drive the fuel rod to rotate, which can ensure that the fuel rod rotates in place, reduce the friction between the fuel rod and the support member, thereby improving the rotation accuracy of the fuel rod and helping to improve the accuracy of data collection and the corresponding accuracy. Description of the Drawings

[0017] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings: Figure 1 It is a schematic structural diagram of a fuel rod diameter continuous measurement device according to an embodiment provided by the present application from the first angle; Figure 2 It is a schematic structural diagram of a fuel rod diameter continuous measurement device according to an embodiment provided by the present application from the second angle; Figure 3 It is a schematic structural diagram of a fuel rod diameter continuous measurement device according to an embodiment provided by the present application from the third angle; Figure 4 It is a schematic structural diagram of a diameter gauge of a fuel rod diameter continuous measurement device according to an embodiment provided by the present application; Figure 5 It is a schematic measurement result diagram of a diameter gauge of a fuel rod diameter continuous measurement device according to an embodiment provided by the present application; Figure 6 is Figure 3 an enlarged view of part A; Figure 7 It is a schematic step flow chart of a fuel rod diameter continuous measurement method according to an embodiment provided by the present application; Wherein, Figures 1 to 6 the corresponding relationship between the reference numerals and the component names in 11, slide rail assembly; 12, bracket; 13, diameter gauge; 14, support member; 15, jaw assembly; 16, fourth slide rail; 21, region of interest; 22, boundary line; 23, diameter line; 111, base; 112, first slide rail; 113, first lead screw; 114, first drive assembly; 121, gantry; 122, second slide rail; 123, second lead screw; 124, second drive assembly; 125, mounting bracket; 126, third slide rail; 127, third lead screw; 128, third drive assembly; 131, housing; 132, window; 133, parallel light source; 134, detection camera; 135, first reflector; 136, second reflector; 137, lead glass; 138, lens hood; 139, protective plate; 141, mounting seat; 142, support wheel; 151. Chuck; 152. Driving device; 153. Fifth slide rail; 154. Moving seat; 155. Sixth slide rail; 156. Fourth lead screw; 157. Fourth driving assembly; 158. Chuck mounting bracket. Detailed implementation manners

[0018] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0019] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0020] In this application, unless otherwise clearly specified and limited, terms such as "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0021] The following describes the preferred embodiments of this application with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain this application and are not used to limit this application.

[0022] As Figures 1 to 3As shown, according to the first aspect of an embodiment of the present application, a fuel rod diameter continuous measuring device is proposed, comprising: a slide rail assembly 11, a bracket 12, a caliper 13, a support member 14 and a clamping jaw assembly 15, wherein the bracket 12 is adjustably arranged on the slide rail assembly 11, and the bracket 12 can slide along the length direction of the slide rail assembly 11; the caliper 13 is adjustably arranged on the bracket 12, and the caliper 13 can slide along the height direction of the bracket 12; the support member 14 is slidably connected to the slide rail assembly 11 for supporting the fuel rod; the clamping jaw assembly 15 is arranged on the slide rail assembly 11, and the clamping jaw assembly 15 is located at the end of the slide rail assembly 11; the clamping jaw assembly 15 comprises a chuck 151 and a driving device 152, the chuck 151 is used to clamp the fuel rod, and the chuck 151 is transmission-connected to the driving device 152 so as to drive the chuck 151 to rotate through the driving device 152.

[0023] The fuel rod diameter continuous measuring device provided in the embodiment of the present application includes a slide rail assembly 11, a bracket 12, a caliper 13, a support 14 and a clamping jaw assembly 15. The fuel rod is placed on the support 14, and the fuel rod is supported by the support 14. The caliper 13 is slidably arranged on the bracket 12, and the bracket 12 is slidably arranged on the slide rail assembly 11. The bracket 12 moves relative to the slide rail assembly 11 to adjust the detection point position of the caliper 13 in the axial direction of the fuel rod. The caliper 13 moves relative to the bracket 12 to adjust the detection height of the caliper 13, thereby improving the convenience of the caliper 13 in detecting the diameter of the fuel rod, and realizing the measurement of different axial positions of the fuel rod; the clamping jaw assembly 15 is arranged at one end of the support 14, and the chuck 151 can clamp the fuel rod placed on the support 14, and the driving device 152 drives the chuck 151 to rotate, and then drives the fuel rod to rotate through the chuck 151, so as to realize the continuous measurement of the diameter of the fuel rod at the same detection point by the diameter gauge 13, that is, to realize the continuous measurement of the radial positions of the fuel rod, and then obtain the diameter value and ellipticity of the detection point, improve the continuity of the detection of the diameter and ellipticity of the fuel rod, and improve the detection efficiency of the diameter and ellipticity of the fuel rod; at the same time, the driving device 152 drives the chuck 151 to rotate to drive the fuel rod to rotate, which can ensure that the fuel rod is rotated into place, reduce the friction between the fuel rod and the support 14, thereby improving the accuracy of the rotation of the fuel rod, and help to improve the accuracy of data collection and the corresponding accuracy.

[0024] Further, the slide rail assembly 11, the bracket 12, the diameter gauge 13, and the jaw assembly 15 are electrically connected to the control system. After measurement, the software in the control system automatically analyzes and processes the data collected by the diameter gauge 13 and outputs the results. Specifically, the output content includes the position coordinate values, diameter values, and roundness of the fuel rod. Among them, the diameter value of the fuel rod is the average value of the measured diameter data at the detection point, and the roundness is the difference between the maximum diameter and the minimum diameter at the detection point. By driving the fuel rod to rotate axially through the jaw assembly 15, all the diameter data at the detection point can be continuously obtained, so as to quickly obtain the diameter value and roundness at the detection point.

[0025] It can be understood that the jaw assembly 15 can clamp and control the rotation of the fuel rod to achieve automatic and continuous measurement of different radial positions of the fuel rod. The diameter gauge 13 is installed on the bracket 12, and the bracket 12 is installed on the slide rail assembly 11. By controlling the software to control the movement of the slide rail assembly 11 and the bracket 12, automatic and continuous measurement of different axial positions of the fuel rod can be achieved. The control software can accurately control the stepping distance of the bracket 12. After the bracket 12 steps in place each time, the control software records the results collected by the diameter gauge 13 and outputs them in a document format. The document includes position coordinates, diameter measurement values, and roundness.

[0026] Further, since the whole device is placed horizontally, there are visual blind spots during measurement. By setting a monitoring device at the end of the slide rail assembly 11 for auxiliary monitoring, the position states of the fuel rod and the diameter gauge 13 can be observed, avoiding machine collision or damage to the fuel rod during measurement.

[0027] As Figure 2 and Figure 3 shown, in a feasible implementation manner, the slide rail assembly 11 includes: a base 111, two first slide rails 112, two first lead screws 113, and a first drive assembly 114. The first slide rails 112 are arranged on the base 111 along the length direction of the base 111. A first slider is slidably connected to the first slide rail 112, and the bracket 12 is connected to the two first sliders. The first lead screw 113 is rotatably connected to the base 111, the first lead screw 113 is arranged parallel to the first slide rail 112, a first nut is threadedly connected to the first lead screw 113, and the first nut is connected to the first slider, and the first nut corresponds to the first slider one by one. The first drive assembly 114 includes a first output end and a second output end. The first output end is connected to one of the first lead screws 113, and the second output end is connected to the other first lead screw 113. The first output end and the second output end drive the two first lead screws 113 to rotate synchronously.

[0028] In this technical solution, the first output end and the second output end of the first driving component 114 rotate synchronously, so as to drive two first lead screws 113 to rotate synchronously through the first output end and the second output end, thereby enabling the two first nuts to move synchronously, and further driving the two first sliders to slide synchronously; the bracket 12 is connected to the first slider, that is, the bracket 12 and the diameter gauge 13 are slidably supported by two first slide rails 112 at the same time. The bracket 12 is slidably supported by double slide rails, sharing the load and avoiding deformation or deviation caused by excessive load on a single first slide rail 112, which can significantly reduce the vibration and sway during the movement of the bracket 12 and ensure that the movement track of the diameter gauge 13 is more accurate and stable; at the same time, the double-rail synchronous drive of the bracket 12 can offset the lateral eccentric load torque, prevent the bracket 12 and the diameter gauge 13 from tilting due to the center of gravity offset, and reduce the detection error of the diameter gauge 13.

[0029] Further, the first driving component 114 includes a first driving motor, a connecting shaft, a first commutator and a second commutator. The input end of the first commutator is connected to the output end of the first driving motor, and the first output end of the first commutator is connected to one of the first lead screws 113; the other output end of the first commutator is connected to the first end of the connecting shaft, the second end of the connecting shaft is connected to the input end of the second commutator, and the second output end of the second commutator is connected to the other first lead screw 113, so as to drive the two first lead screws 113 to rotate synchronously through the first driving motor, so as to realize the synchronous movement of the two first nuts, and further drive the two first sliders to move synchronously.

[0030] Such as Figure 2 And Figure 3As shown, in a feasible embodiment, the bracket 12 includes: a gantry 121, a second slide rail 122, a second lead screw 123, a second drive assembly 124, a mounting bracket 125, a third slide rail 126, a third lead screw 127, and a third drive assembly 128; the gantry 121 is straddled above the support member 14, the gantry 121 is perpendicular to the first slide rail 112, and the gantry 121 is connected to two first sliders at the same time; the second slide rail 122 is arranged on the gantry 121 along the length direction of the gantry 121, and a second slider is slidably connected to the second slide rail 122; the second lead screw 123 is rotatably connected to the gantry 121, the second lead screw 123 is arranged parallel to the second slide rail 122, a second nut is threadedly connected to the second lead screw 123, and the second nut is connected to the second slider; the second drive assembly 124 is arranged on the gantry 121, and the output shaft of the second drive assembly 124 is connected to the second lead screw 123 to drive the second lead screw 123 to rotate; the mounting bracket 125 is connected to the second slider; the third slide rail 126 is arranged on the mounting bracket 125 along the height direction of the gantry 121, a third slider is slidably connected to the third slide rail 126, and the diameter gauge 13 is mounted on the third slider; the third lead screw 127 is rotatably connected to the mounting bracket 125, the third lead screw 127 is arranged parallel to the third slide rail 126, a third nut is threadedly connected to the third lead screw 127, and the third nut is connected to the third slider; the third drive assembly 128 is arranged on the mounting bracket 125, and the output shaft of the third drive assembly 128 is connected to the third lead screw 127 to drive the third lead screw 127 to rotate.

[0031] In this technical solution, the gantry 121 is arranged along the width direction of the slide rail assembly 11, the gantry 121 straddles the slide rail assembly 11, and the gantry 121 is connected to two first sliders at the same time to drive the gantry 121 to move through the two first slide rails 112 at the same time, ensuring the accuracy of the movement of the gantry 121; the diameter gauge 13 is mounted on the third slider, and the third slider can move along the height direction of the gantry 121 on the third slide rail 126 to realize the adjustment of the detection height of the diameter gauge 13; the third slide rail 126 is mounted on the second slider through the mounting bracket 125, and the second slider can move along the length direction of the gantry 121 on the second slide rail 122, that is, the second slider drives the diameter gauge 13 to move along the width direction of the slide rail assembly 11. Through the cooperation of the first slide rail 112, the second slide rail 122, and the third slide rail 126, the movement adjustment of the diameter gauge 13 in the X, Y, and Z directions is realized, ensuring that the diameter gauge 13 can be aligned with the fuel rod. The three lead screws respectively ensure the movement accuracy of the first slider, the second slider, and the third slider, thus ensuring the movement adjustment accuracy of the diameter gauge 13 and helping to ensure the accuracy of the measurement result of the diameter gauge 13.

[0032] It can be understood that the X direction is the length direction of the first slide rail 112, the Y direction is the length direction of the second slide rail 122, and the Z direction is the length direction of the third slide rail 126. The diameter gauge 13 is electrically connected to the control system. By recording the positions of the diameter gauge 13 in the X, Y, and Z directions through the control system, the coordinates of the diameter gauge 13 can be determined.

[0033] As Figure 4 shown, in a feasible implementation, the diameter gauge 13 includes: a housing 131, two windows 132, a parallel light source 133, a detection camera 134, a first reflector 135, and a second reflector 136; a relief groove is provided on the bottom surface of the housing 131, the relief groove is arranged along the length direction of the slide rail assembly 11, and the relief groove extends towards the top of the housing 131 to form a detection cavity; the windows 132 are opened on the groove wall of the relief groove, and the two windows 132 are arranged opposite to each other; the parallel light source 133 is arranged inside the housing 131, the parallel light source 133 emits a vertical parallel light beam, and the parallel light source 133 is located on one side of the detection cavity; the detection camera 134 is arranged inside the housing 131, and the detection camera 134 is located on the other side of the detection cavity; the first reflector 135 is arranged inside the housing 131, the first reflector 135 is arranged opposite to the parallel light source 133, and the first reflector 135 reflects the parallel light beam into the window 132; the second reflector 136 is arranged inside the housing 131, the second reflector 136 is arranged opposite to the detection camera 134, and the second reflector 136 makes the parallel light beam passing through the window 132 enter the detection camera 134 vertically.

[0034] In this technical solution, the parallel light beam emitted by the parallel light source 133 enters the detection camera 134 after being reflected by the first reflector 135 and the second reflector 136; the relief groove runs through the bottom surface of the housing 131 along the width direction of the housing 131, and the window 132 is provided on the groove wall of the relief groove. During detection, the diameter gauge 13 descends so that the fuel rod is located between the two windows 132. The parallel light beam reflected by the first reflector 135 irradiates the fuel rod after propagation. Part of the parallel light beam reflected by the first reflector 135 is blocked by the fuel rod, and the unblocked parallel light beam continues to propagate to the second reflector 136. The parallel light beam is reflected into the detection camera 134 by the second reflector 136 and received by the detection camera 134; the parallel light source 133 and the detection camera 134 are arranged in the same housing 131. By moving the housing 131, the synchronization of the adjustment of the parallel light source and the detection camera 134 is ensured, thereby ensuring the accuracy of the detection by the diameter gauge 13; at the same time, the detection camera 134 uses the parallel light beam reflected by the first reflector 135 and the second reflector 136 to detect the fuel rod. On the basis of ensuring the detection accuracy, the fuel rod is not directly opposite to the detection camera 134 and the parallel light source 133, thereby avoiding the direct radiation of the rays emitted by the fuel rod itself to the electrical components, and thus the service life of the diameter gauge 13 can be extended.

[0035] It should be noted that after the detection camera 134 receives the reflected parallel light beam, the result observed by the detection camera 134 is as follows: Figure 5 As shown, the software algorithm will automatically fit two boundary lines 22 at the pixel value mutation points in the preset area of ​​interest 21, and then calculate the number of pixels of the distance between the two boundary curves. If the size of a pixel point is known, the distance between the two boundary lines 22 can be calculated, that is, the length of the diameter line 23 of a certain point can be calculated, so as to measure the diameter of the sample at that point.

[0036] Furthermore, the second slide rail 122 and the third slide rail 126 have high movement and positioning accuracy, which can ensure that the distance between the fuel rod and the detection camera 134 is basically consistent each time the diameter gauge 13 measures, so that the actual size represented by the pixel point changes little, thereby reducing the measurement error caused by the inconsistent distance between the fuel rod and the detection camera 134.

[0037] Furthermore, the boundary line 22 of the diameter gauge 13 is fitted by the pixel value mutation point in the region of interest 21. When the fuel rod is tilted at a certain angle to the window 132, the fitted boundary line 22 will also tilt accordingly. The measurement result of the fuel rod diameter is not affected by the angle at which the fuel rod is placed, thereby reducing the measurement error caused by the tilt of the fuel rod, reducing the measurement difficulty, and improving the measurement accuracy.

[0038] like Figure 4 As shown, in a feasible embodiment, the diameter gauge 13 also includes: lead glass 137, a lens cover 138 and a protective plate 139; the lead glass 137 covers the window 132, and the lead glass 137 is connected to the shell 131; the lens cover 138 is arranged on the groove wall of the give way groove, and the lens cover 138 is located at one end of the detection cavity close to the parallel light source 133; the protective plate 139 is arranged on the inner wall of the lens cover 138.

[0039] In this technical solution, lead glass 137 is arranged in the window 132, and the lead glass 137 is connected to the shell 131 to shield the rays emitted by the fuel rod itself through the lead glass 137; a lens cover 138 is arranged above the window 132, and the lens cover 138 is located between the detection camera 134 and the parallel light source 133 to prevent the detection camera 134 from receiving the unreflected parallel light source 133; by arranging a protective plate 139 on the inner wall of the lens cover 138, the rays emitted by the fuel rod itself are further shielded and protected, thereby effectively extending the service life of the diameter gauge 13.

[0040] Specifically, the protective plate 139 is a lead protective plate.

[0041] like Figure 2 and Figure 3As shown, in a feasible implementation, the fuel rod diameter continuous measurement device further includes: a fourth slide rail 16, which is arranged on the slide rail assembly 11 along the length direction of the slide rail assembly 11. A number of fourth sliders are slidably connected to the fourth slide rail 16, and a support member 14 is arranged on the fourth sliders, with the support member 14 corresponding to the fourth sliders one by one; the support member 14 includes: a mounting seat 141 and a support wheel 142, the mounting seat 141 is arranged on the fourth slider; the support wheel 142 is rotatably arranged on the mounting seat 141, and the rotation axis of the support wheel 142 is perpendicular to the fourth slide rail 16; a positioning groove is arranged on the support wheel 142, the positioning groove is arranged along the circumferential direction of the support wheel 142, and the positioning groove is used for placing the fuel rod.

[0042] In this technical solution, the fourth slide rail 16 is arranged parallel to the first slide rail 112. The support member 14 can slide on the fourth slide rail. By sliding the support member 14, the axial position of the support member 14 on the fuel rod can be adjusted, and it can adapt to fuel rods of different length dimensions and make the fuel rod parallel to the first slide rail 112. The support wheel 142 is fixed on the fourth slider through the mounting seat 141. By arranging a positioning groove on the support wheel 142, when placing the fuel rod, the fuel rod is placed in the positioning groove, and the positioning groove can be used to limit the fuel rod in the radial direction to prevent the fuel rod from freely rolling and displacing, thereby ensuring the accuracy of the fuel rod position, which helps to ensure the accuracy and reliability of the measurement result.

[0043] As Figure 2 , Figure 3 and Figure 6 As shown, in a feasible implementation, the jaw assembly 15 further includes: a fifth slide rail 153, a moving seat 154, a sixth slide rail 155, a fourth lead screw 156, a fourth drive assembly 157 and a chuck mounting bracket 158. The fifth slide rail 153 is arranged on the slide rail assembly 11 along the width direction of the slide rail assembly 11. A fifth slider is slidably connected to the fifth slide rail 153; the moving seat 154 is arranged on the fifth slider; the sixth slide rail 155 is arranged on the moving seat 154 along the height direction of the moving seat 154. A sixth slider is slidably connected to the sixth slide rail 155; the fourth lead screw 156 is arranged along the height direction of the moving seat 154, the fourth lead screw 156 is rotatably connected to the moving seat 154, a fourth nut is threadedly connected to the fourth lead screw 156, and the fourth nut is connected to the sixth slider; the fourth drive assembly 157 is arranged on the moving seat 154, and the output shaft of the fourth drive assembly 157 is connected to the fourth lead screw 156 to drive the fourth lead screw 156 to rotate; the chuck mounting bracket 158 is arranged on the sixth slider; the chuck 151 is rotatably arranged on the chuck mounting bracket 158, and the chuck 151 is arranged opposite to the support member 14; the driving device 152 is arranged on the chuck mounting bracket 158, and the driving device 152 drives the chuck 151 to rotate relative to the chuck mounting bracket 158.

[0044] In this technical solution, the position of the chuck 151 is fixed in the axial direction of the fuel rod, and the positions of the chuck 151 in the radial and height directions of the fuel rod can be adjusted. When the chuck 151 clamps the fuel rod, it is ensured that the fuel rod can be inserted into the positioning groove, so as to ensure that the support member 14 plays a supporting role on the fuel rod and ensure the straightness and stability of the fuel rod after placement. The fifth slide rail 153 is arranged along the width direction of the slide rail assembly 11. During the clamping process of the chuck 151, the chuck 151 can move freely along the radial direction of the fuel rod, avoiding the fuel rod being subjected to the shearing force of the chuck 151 and the support member 14 after the chuck 151 clamps the fuel rod, preventing the deformation of the fuel rod to ensure the accuracy of the measurement of the fuel rod; The sixth slide rail 155 is arranged along the height direction of the slide rail assembly 11. The fourth lead screw 156 is driven to rotate by the fourth drive assembly 157 to drive the fourth nut and the sixth slider to move, so as to adjust the height of the chuck 151 to adapt to fuel rods of different diameter sizes.

[0045] Further, the driving device 152 is connected to the chuck 151 through gear transmission to ensure the precise control of the rotation of the driving device 152 on the chuck 151.

[0046] Further, an air vent pipe is arranged on the chuck 151. The air vent pipe is rotationally connected to the pneumatic system. The tightening and opening of the chuck 151 are controlled by the pneumatic system. At the same time, the chuck 151 rotates synchronously with the air vent pipe, avoiding the interference of the pneumatic system on the rotation of the chuck 151 and ensuring the flexibility and accuracy of the rotation of the chuck 151.

[0047] As Figure 7 shown, according to the second aspect of the present application, a method for continuously measuring the diameter of a fuel rod is proposed. The measurement is carried out by using the fuel rod diameter continuous measurement device according to any one of the above technical solutions, including: Step 100: Lift the diameter measuring instrument to the highest point, place the fuel rod on the support member, and clamp the fuel rod with the jaw assembly; Step 200: Lower the diameter measuring instrument to the first height and move the diameter measuring instrument to the starting detection point; Step 300: The diameter measuring instrument starts to collect data; Step 400: Rotate the jaw assembly by a first preset angle, and the diameter measuring instrument collects data again; Step 500: Move the diameter measuring instrument to the next detection point; Step 600: Repeat the data collection method at the starting detection point at each detection point until the measurement of the entire fuel rod is completed; Wherein, the first height is the detection height of the diameter measuring instrument.

[0048] Through the fuel rod diameter continuous measurement method provided by the embodiments of the present application, when measuring the diameter of the fuel rod, first control the bracket to lift the diameter gauge to the top to avoid interference during the clamping of the fuel rod; place the fuel rod on the support member through the manipulator, and clamp and fix one end of the fuel rod with the chuck; control the bracket to lower the position of the diameter gauge to the detection area of the diameter gauge; move the bracket to the starting detection point near one end of the jaw assembly through the slide rail assembly to start the measurement, and the diameter gauge starts to collect data. After one collection is completed, the jaw rotates by a first preset angle, and the diameter gauge collects data again. After the collection at this detection point is completed, the slide rail assembly moves the bracket to the next detection point, and continues the above measurement steps until the diameter measurement of the entire fuel rod is completed, realizing the continuous measurement of the entire fuel rod, with convenient operation and high measurement efficiency. The fuel rod is placed on the support member, and the support member supports the fuel rod. The diameter gauge is slidably arranged on the bracket, and the bracket is slidably arranged on the slide rail assembly. By moving the bracket relative to the slide rail assembly, the detection point of the diameter gauge in the axial direction of the fuel rod can be adjusted. By moving the diameter gauge relative to the bracket, the detection height of the diameter gauge can be adjusted, thereby improving the convenience of the diameter gauge for detecting the diameter of the fuel rod and realizing the measurement of different positions in the axial direction of the fuel rod; the jaw assembly is arranged at one end of the support member, and the chuck can clamp the fuel rod placed on the support member. The driving device drives the chuck to rotate, and then drives the fuel rod to rotate through the chuck, so as to realize the continuous measurement of the diameter of the fuel rod at the same detection point, that is, to realize the continuous measurement of different positions in the radial direction of the fuel rod, and then obtain the diameter value and roundness of this detection point, improving the continuity of the fuel rod diameter and roundness detection and the detection efficiency of the fuel rod diameter and roundness; at the same time, driving the chuck to rotate by the driving device to drive the fuel rod to rotate can ensure that the fuel rod rotates in place, reduce the friction between the fuel rod and the support member, thereby improving the rotation accuracy of the fuel rod and contributing to improving the accuracy of data collection and the corresponding accuracy.

[0049] Further, the slide rail assembly, the bracket, the jaw assembly and the diameter gauge are controlled by the control system to work.

[0050] Further, before starting the measurement, first open the measurement software and set the stepping distance of the bracket and the number of times of point collection and photographing. The first preset angle of the chuck is obtained according to the set number of point collection and photographing.

[0051] Further, after the measurement, the control software in the control system automatically analyzes and processes the collected data and outputs it. Specifically, the output content includes the position coordinate value, diameter value and roundness of the fuel rod. The fuel rod diameter value is the average value of the measurement data at this detection point, and the roundness is the difference between the maximum diameter and the minimum diameter at this detection point.

[0052] In a feasible implementation, the steps of lowering the diameter gauge to the first height and moving the diameter gauge to the starting detection point position include: Lower the diameter gauge to the middle position of the fuel rod at the window height; Make the parallel light source emit parallel light beams vertically downward, and after the parallel light beams are reflected, make them enter the diameter gauge vertically upward, and use the reflected parallel light beams to detect the fuel rod.

[0053] In this technical solution, lower the diameter gauge to the middle position of the fuel rod at the window height so that the fuel rod is located in the detection cavity, and make the parallel light source emit parallel light beams vertically downward, so as to ensure that the reflected parallel light beams can completely cover the fuel rod, and the reflected parallel light beams not blocked by the fuel rod enter the diameter gauge vertically upward, and use the reflected parallel light beams to detect the fuel rod.

[0054] In a feasible implementation, set the step distance of the diameter gauge to be equal to the width of the parallel light beam.

[0055] In this technical solution, the parallel light beam emitted by the parallel light source has a certain width. By setting the step distance of the bracket to the width of the parallel light source, the area of repeated acquisition by the diameter gauge can be reduced, and the efficiency of continuous measurement of the entire fuel rod can be further improved.

[0056] It can be understood that the method for continuously measuring the diameter of the fuel rod provided by the embodiments of the present application is applied to the device for continuously measuring the diameter of the fuel rod in any of the above technical solutions. Therefore, the method for continuously measuring the diameter of the fuel rod has all the beneficial effects of the device for continuously measuring the diameter of the fuel rod in the above technical solutions.

[0057] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above advantageous ways can be freely combined and superimposed.

[0058] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and variations can be made without departing from the technical principle of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A fuel rod diameter continuous measurement device, characterized in that, The fuel rod diameter continuous measurement device includes: A slide rail assembly; A bracket, which is adjustably arranged on the slide rail assembly and can slide along the length direction of the slide rail assembly; A diameter gauge, which is adjustably arranged on the bracket and can slide along the height direction of the bracket; A support member, which is slidably connected to the slide rail assembly and is used to support the fuel rod; A jaw assembly, which is arranged on the slide rail assembly and is located at the end of the slide rail assembly; the jaw assembly includes a chuck and a driving device, the chuck is used to clamp the fuel rod, and the chuck is in transmission connection with the driving device to drive the chuck to rotate through the driving device.

2. The fuel rod diameter continuous measurement device according to claim 1, characterized in that The slide rail assembly includes: A base; Two first slide rails, which are arranged on the base along the length direction of the base; a first slider is slidably connected to the first slide rail, and the bracket is connected to the two first sliders; Two first lead screws, which are rotatably connected to the base, the first lead screws are arranged parallel to the first slide rails, a first nut is threadedly connected to the first lead screw, the first nut is connected to the first slider, and the first nut corresponds to the first slider one by one; A first driving component, which includes a first output end and a second output end, the first output end is connected to one of the first lead screws, the second output end is connected to the other first lead screw, and the first output end and the second output end drive the two first lead screws to rotate synchronously.

3. The fuel rod diameter continuous measurement device according to claim 2, characterized in that The bracket includes: A gantry, which straddles above the support member, the gantry is perpendicular to the first slide rail and is simultaneously connected to the two first sliders; A second slide rail, which is arranged on the gantry along the length direction of the gantry, and a second slider is slidably connected to the second slide rail; A second lead screw, which is rotatably connected to the gantry, the second lead screw is arranged parallel to the second slide rail, a second nut is threadedly connected to the second lead screw, and the second nut is connected to the second slider; A second driving component, which is arranged on the gantry, and the output shaft of the second driving component is connected to the second lead screw to drive the second lead screw to rotate; A mounting frame, which is connected to the second slider; A third slide rail, which is arranged on the mounting frame along the height direction of the gantry, and a third slider is slidably connected to the third slide rail, and the diameter gauge is installed on the third slider; A third lead screw, which is rotatably connected to the mounting frame, the third lead screw is arranged parallel to the third slide rail, a third nut is threadedly connected to the third lead screw, and the third nut is connected to the third slider; The third driving component is arranged on the mounting bracket, and the output shaft of the third driving component is connected to the third lead screw to drive the third lead screw to rotate.

4. The continuous fuel rod diameter measuring device according to claim 1, wherein the diameter gauge comprises: a housing, a relief groove is arranged on the bottom surface of the housing, the relief groove is arranged along the length direction of the slide rail assembly, and the relief groove extends towards the top of the housing to form a detection cavity; two windows, the windows are opened on the groove wall of the relief groove, and the two windows are arranged oppositely; a parallel light source, the parallel light source is arranged in the housing, the parallel light source emits a vertical parallel light beam, and the parallel light source is located on one side of the detection cavity; a detection camera, the detection camera is arranged in the housing, and the detection camera is located on the other side of the detection cavity; a first reflector, the first reflector is arranged in the housing, the first reflector is arranged opposite to the parallel light source, and the first reflector reflects the parallel light beam into the window; a second reflector, the second reflector is arranged in the housing, the second reflector is arranged opposite to the detection camera, and the second reflector makes the parallel light beam passing through the window enter the detection camera vertically.

5. The continuous fuel rod diameter measuring device according to claim 4, wherein the diameter gauge further comprises: lead glass, the lead glass covers the window, and the lead glass is connected to the housing; a lens hood, the lens hood is arranged on the groove wall of the relief groove, and the lens hood is located at one end of the detection cavity close to the parallel light source; a protective plate, the protective plate is arranged on the inner wall of the lens hood.

6. The continuous fuel rod diameter measuring device according to claim 1, characterized in that, The continuous fuel rod diameter measuring device further comprises: a fourth slide rail, the fourth slide rail is arranged on the slide rail assembly along the length direction of the slide rail assembly, a plurality of fourth sliders are slidably connected to the fourth slide rail, and the support member is arranged on the fourth sliders, and the support members correspond to the fourth sliders one by one; the support member comprises: a mounting seat, the mounting seat is arranged on the fourth slider; a support wheel, the support wheel is rotatably arranged on the mounting seat, and the rotation axis of the support wheel is perpendicular to the fourth slide rail; a positioning groove is arranged on the support wheel, the positioning groove is arranged along the circumferential direction of the support wheel, and the positioning groove is used for placing the fuel rod.

7. The continuous fuel rod diameter measuring device according to claim 1, wherein the jaw assembly further comprises: a fifth slide rail, the fifth slide rail is arranged on the slide rail assembly along the width direction of the slide rail assembly, and a fifth slider is slidably connected to the fifth slide rail; a moving seat, the moving seat is arranged on the fifth slider; a sixth slide rail, the sixth slide rail is arranged on the moving seat along the height direction of the moving seat, and a sixth slider is slidably connected to the sixth slide rail; The fourth lead screw is arranged along the height direction of the moving seat. The fourth lead screw is rotatably connected to the moving seat. A fourth nut is threadedly connected to the fourth lead screw, and the fourth nut is connected to the sixth slider. The fourth driving assembly is arranged on the moving seat. The output shaft of the fourth driving assembly is connected to the fourth lead screw to drive the fourth lead screw to rotate. The chuck mounting bracket is arranged on the sixth slider. The chuck is rotatably arranged on the chuck mounting bracket, and the chuck is oppositely arranged with the support member. The driving device is arranged on the chuck mounting bracket, and the driving device drives the chuck to rotate relative to the chuck mounting bracket.

8. A method for continuously measuring the diameter of a fuel rod, characterized in that, Measurement is carried out by using a fuel rod diameter continuous measurement device according to any one of claims 1 to 7, including: Lift the diameter gauge to the highest point, place the fuel rod on the support member, and clamp the fuel rod with the jaw assembly. Lower the diameter gauge to the first height and move the diameter gauge to the starting detection position. The diameter gauge starts to collect data. Rotate the jaw assembly by a first preset angle, and the diameter gauge collects data again. Move the diameter gauge to the next detection position. Repeat the data collection method at the starting detection position at each of the detection positions until the measurement of the entire fuel rod is completed. Wherein, the first height is the detection height of the diameter gauge.

9. A method for continuously measuring the diameter of a fuel rod according to claim 8, characterized in that The step of lowering the diameter gauge to the first height and moving the diameter gauge to the starting detection position includes: Lower the diameter gauge to the middle position of the fuel rod at the window height. Make the parallel light source emit parallel light beams vertically downward, and after the parallel light beams are reflected, make them enter the diameter gauge vertically upward, and use the reflected parallel light beams to detect the fuel rod.

10. According to the method for continuously measuring the diameter of a fuel rod according to claim 9, characterized in that Set the step distance of the diameter gauge to be equal to the width of the parallel light beam.

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