Device and method for detecting jumping of related rod of nuclear fuel element

Abstract

The invention belongs to the technical field of nuclear power, and particularly relates to a device and a method for detecting jumping of related rods of a nuclear fuel element. According to the device for detecting the jumping of the related rod of the nuclear fuel element, the optical detection system is used for detecting the jumping degree of the related rod of the nuclear fuel element for the first time. The non-contact measurement of the runout degree of the related rod of the nuclear fuel element is realized through the cooperation of all the parts, and the position of the optical detection system can be adjusted according to the outer diameter of a measured object through the design of the pressing wheel, the V-shaped groove and the adjusting structure, so that the detection problem of the runout degree of the related rods of the nuclear fuel elements with different lengths and different inner diameters can be flexibly adapted; therefore, the detection efficiency and the detection quality of the related rod of the nuclear fuel element are greatly improved, and human errors are effectively avoided.

Description

Technical Field

[0001] The invention belongs to the field of nuclear power technology, and in particular relates to a device and method for detecting the bounce of nuclear fuel element related rods. Background Art

[0002] The rods related to nuclear fuel elements may include, for example, control rods, fuel poison rods, neutron source rods, etc. During the production process of the rods related to nuclear fuel elements, 100% measurement of the radial runout of the end plug is required. The related technology uses a dial indicator to measure manually, which has low measurement efficiency. The position of the measuring fixture must be adjusted for each measurement. The operation is inconvenient and time-consuming. It takes at least about 1.2 minutes to measure one rod on average. Since the contact surface to be tested is very small, the static and dynamic errors of the measurement are difficult to control, which easily affects the measurement accuracy. In addition, the measurement process relies entirely on manual measurement and visual observation, and there is a certain visual error. Therefore, considering the workload and labor intensity of the detection, it is urgent to improve the detection accuracy, reduce the labor intensity, and improve the detection efficiency. Summary of the invention

[0003] In order to overcome the problems existing in the related art, a device and method for detecting the jump of nuclear fuel element related rods are provided.

[0004] According to one aspect of an embodiment of the present disclosure, there is provided a device for detecting the bounce of a rod associated with a nuclear fuel element, the device comprising: a horizontal camera housing, a support plate, a plumb camera, a fixing plate, a plumb camera housing, a pressure wheel, a V-shaped groove, a platform, an auxiliary pressure wheel, an adjustment mechanism, a connecting rod, a support, and a horizontal camera;

[0005] The horizontal camera cover is arranged outside the horizontal camera, and is used to protect the horizontal camera from being affected by external light when working, and to protect the horizontal camera from being hit; the horizontal camera is fixedly connected to the support, and is fixed by the horizontal camera cover, and is used to measure the end face runout value of the relevant rod of the nuclear fuel element;

[0006] The lower end of the support plate is fixedly connected to the horizontal camera housing, and the upper end of the support plate is fixedly connected to one side of the fixed plate and supports the fixed plate; the plumb camera is fixedly connected to the other side of the fixed plate and is used to measure the radial runout value of the rods related to the nuclear fuel element; the plumb camera housing is fixed to the plumb camera and is arranged on the outside of the plumb camera to protect the horizontal camera from being affected by external light when working, and protect the plumb camera from being hit;

[0007] The pressure wheel is provided with a bearing and can realize free rotation. The pressure wheel is fixed on the connecting rod by a pin connection. The relevant rods of the nuclear fuel element to be tested are fastened in the V-groove by the gravity of the pressure wheel. The V-groove is fixedly connected to the platform, the adjustment mechanism is fixed on the support and used to adjust the clamping position. The connecting rod is fixedly connected to the support and pneumatically used to realize the pressing and lifting action of the pressure wheel.

[0008] The support is fixedly arranged on one side of the platform, and is used for carrying the adjustment mechanism, the connecting rod, and the horizontal camera; the platform is the base of the whole device, and is used for carrying all the parts of the whole device.

[0009] In a possible implementation, the device also includes: a first power cord and a second power cord; the first power cord is used to supply power to the horizontal camera and support signal transmission of the horizontal camera, and the second power cord is used to supply power to the vertical camera and support signal transmission of the vertical camera.

[0010] In a possible implementation, the platform may be made of marble.

[0011] In a possible implementation, the V-shaped groove fixes the auxiliary pressing wheel through a threaded connection, and the auxiliary pressing wheel and the pressing wheel together fasten the rods related to the nuclear fuel element to be tested in the V-shaped groove.

[0012] According to one aspect of an embodiment of the present disclosure, a method for detecting the bounce of a rod associated with a nuclear fuel element is provided, the method further comprising: performing measurement by adopting the following steps;

[0013] Step 1: Place the workpiece to be tested into the testing device, support and position it with the support seat assembly and the roller support assembly; and position the axial position along the axis direction with the limit assembly;

[0014] Step 2, respectively adjusting the positions of the radial point laser measurement sensor and the axial point laser measurement sensor so that the measurement points of the two sensors are aligned with the measured points of the workpiece to be measured;

[0015] Step 3. Click the measurement button to start measuring, press down the pressure wheel and press the workpiece, and rotate the handwheel to drive the pressure wheel to rotate and drive the workpiece to rotate.

[0016] In a possible implementation, the method further includes calibrating the device using the following steps:

[0017] Step 4, using a radial point laser measurement sensor and an axial point laser measurement sensor installed at the end position of the measuring device to measure the radial runout and end face runout of the standard rod respectively;

[0018] During calibration, place the measuring standard rod into the measuring device, and support and position it with the support seat assembly and the roller support assembly; use the limit assembly to position the axial position along the axis direction; adjust the radial point laser measurement sensor and the axial point laser measurement sensor positions respectively, so that the two sensor measurement points are aligned with the measurement points of the measuring standard rod; click the measurement button to start measuring, press down the pressure wheel and press the measuring standard rod, and at the same time rotate the handwheel to drive the pressure wheel to rotate and drive the measuring standard rod to rotate;

[0019] Step 5, radial runout measurement repeatability, measuring the radial runout of the end of the standard rod to be measured for a preset number of times, and calculating the measurement repeatability of the measured value as the radial runout measurement repeatability error value of the measuring device;

[0020] Step 6, radial runout measurement indication error, compare the preset number of radial runouts of the measurement standard rod, the deviation between the measured value and the nominal value, and select the maximum deviation as the radial runout measurement indication error.

[0021] The beneficial effect of the present disclosure is that: the detection device for the runout of the nuclear fuel element related rods provided by the present disclosure uses an optical detection system for the first time to detect the runout of the nuclear fuel element related rods. The non-contact measurement of the runout of the nuclear fuel element related rods is achieved through the cooperation of various components. The design of the pressure wheel, V-shaped groove and adjustment structure can adjust the position of the optical detection system according to the outer diameter size of the object to be measured, thereby flexibly adapting to the detection problem of the runout of the nuclear fuel element related rods of different lengths and different inner diameters; thereby greatly improving the detection efficiency and detection quality of the nuclear fuel element related rods, and effectively avoiding human errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view of a device for detecting the bounce of nuclear fuel element related rods shown in an embodiment of the present disclosure.

[0023] Figure 2 It is a top view of a device for detecting the bounce of nuclear fuel element related rods shown in an embodiment of the present disclosure.

[0024] Figure 3 It is a left view of a device for detecting the bounce of nuclear fuel element related rods shown in an embodiment of the present disclosure.

[0025] In the figure:

[0026] 1—first power cord; 2—horizontal camera cover; 3—support plate; 4—plumb camera; 5—fixing plate;

[0027] 6—second power cord; 7—plumb camera cover; 8—pressing wheel; 9—V-shaped groove; 10—platform;

[0028] 11—auxiliary pressure wheel; 12—adjustment mechanism; 13—connecting rod; 14—support; 15—horizontal camera. DETAILED DESCRIPTION

[0029] The present disclosure is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Unless otherwise defined, the technical and scientific terms used in the present disclosure have the same meanings as those generally understood by those skilled in the art to which the present disclosure belongs; the terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the term "including" and any variations thereof in the present disclosure are intended to cover non-exclusive inclusions. Obviously, the embodiments described in the present disclosure are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative efforts are within the scope of protection of the present disclosure.

[0031] Reference to "embodiments" in this disclosure means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the disclosure. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] See also Figures 1 to 3 The nuclear fuel element-related rod bounce detection device disclosed in the present invention includes: a first power line 1, a second power line 6, a horizontal camera cover 2, a support plate 3, a plumb camera 4, a fixing plate 5, a plumb camera cover 7, a pressure wheel 8, a V-shaped groove 9, a platform 10, an auxiliary pressure wheel 11, an adjustment mechanism 12, a connecting rod 13, a support 14, and a horizontal camera 15.

[0033] The first power line 1 is used to supply power to the horizontal camera 15 and support signal transmission of the horizontal camera 15 . The second power line 6 is used to supply power to the vertical camera 4 and support signal transmission of the vertical camera 4 .

[0034] The horizontal camera cover 2 is arranged outside the horizontal camera 15 to protect the horizontal camera 15 from being affected by external light when working and to protect the horizontal camera 15 from being hit. The lower end of the support plate 3 is fixedly connected to the horizontal camera cover 2, and the upper end of the support plate 3 is fixedly connected to one side of the fixing plate 5 and supports the fixing plate 5.

[0035] The plumb camera 4 is connected to the other side of the fixing plate 5 and is used to measure the radial runout value of the nuclear fuel element tube and rod. The plumb camera cover 7 is fixed to the plumb camera 4 by a clamp connection method and is arranged on the outside of the plumb camera 4 to protect the horizontal camera 15 from being affected by external light when working and to protect the plumb camera 4 from being hit.

[0036] The pressure wheel 8 has a bearing and can rotate freely. The pressure wheel 8 is fixed on the connecting rod 13 by a pin connection. Through the gravity of the pressure wheel 8, the related rods of the nuclear fuel element to be tested are fastened in the V-groove 9, which effectively ensures that the related rods of the nuclear fuel element remain stable during the detection process.

[0037] The V-shaped groove 9 is fixedly connected to the platform 10 (the material of the platform 10 can be marble), and the V-shaped groove 9 is fixed with the auxiliary pressing wheel 11 through a threaded connection. The auxiliary pressing wheel 11 and the pressing wheel 8 together fasten the relevant rods of the nuclear fuel element to be tested in the V-shaped groove 9, and can adaptably place the relevant rods of the nuclear fuel element of different lengths and diameters, and play a supporting and centering role for the relevant rods of the nuclear fuel element to be tested. The platform 10 is the base of the overall device, which is used to carry all the components of the overall device.

[0038] The adjusting mechanism 12 is processed with a threaded hole and is fixed to the support 14 by threaded connection, which is used to adjust the clamping position and realize the rapid replacement of different detection positions. The connecting rod 13 is fixed to the support 14 by threaded connection and is pneumatically used to realize the pressing and lifting action of the pressure wheel.

[0039] The support 14 is disposed on one side of the platform 10 and has a plurality of threaded holes, which respectively fix the adjustment mechanism 12 , the connecting rod 13 , and the horizontal camera 15 through threaded connections, and is used to carry the adjustment mechanism 12 , the connecting rod 13 , and the horizontal camera 15 .

[0040] According to another aspect of an embodiment of the present disclosure, a method for detecting the bounce of rods related to nuclear fuel elements is provided, and the method further includes: performing measurements using the following steps.

[0041] Step 1: Place the workpiece to be tested into the detection device, and support and position it by the support seat assembly and the roller support assembly; and position the axial position along the axial direction by the limit assembly.

[0042] Step 2: respectively adjust the positions of the radial point laser measurement sensor and the axial point laser measurement sensor so that the measurement points of the two sensors are aligned with the measured points of the workpiece to be measured.

[0043] Step 3. Click the measurement button to start measuring, press down the pressure wheel and clamp the workpiece, and at the same time rotate the handwheel to drive the pressure wheel to rotate and drive the workpiece to rotate (apply force slightly toward the tail along the axis during rotation to prevent the tail of the workpiece from not contacting tightly with the tail stopper assembly during measurement, thereby affecting the measurement accuracy).

[0044] In one possible implementation, the method includes calibrating the device using the following steps.

[0045] Step 4, using a radial point laser measurement sensor and an axial point laser measurement sensor installed at the end position of the measuring device to measure the radial runout and end face runout of the standard rod respectively;

[0046] During calibration, place the measuring standard rod into the measuring device, which is supported and positioned by the support seat assembly and the roller support assembly; the axial position is positioned along the axis direction by the limit assembly. Adjust the positions of the radial point laser measurement sensor and the axial point laser measurement sensor respectively, so that the two sensor measurement points are aligned with the measurement points of the measuring standard rod. Click the measurement button to start the measurement, press down the pressure wheel and press the measuring standard rod, and at the same time rotate the handwheel to drive the pressure wheel to rotate and drive the measuring standard rod to rotate (apply a little force to the tail along the axis direction during the rotation to prevent the tail of the measured standard rod from not being in tight contact with the tail stopper assembly during measurement, which affects the measurement accuracy).

[0047] Step 5, radial runout measurement repeatability, measuring the radial runout of the end of the standard rod to be measured a preset number of times, calculating the measurement repeatability (also called standard deviation) of the measured value as the radial runout measurement repeatability error value of the measuring device.

[0048] Step 6, radial runout measurement indication error, compare the preset number of radial runouts of the measurement standard rod, the deviation between the measured value and the nominal value, and select the maximum deviation as the radial runout measurement indication error.

[0049] In an application example, the detection length range of the device disclosed in the present invention is between 200 and 4500 mm; the radial measurement error is ±0.01 mm; the device disclosed in the present invention has high repeatability: a fixing device is used, and the V-groove is used as a reference to fix the nuclear fuel element. The optical detection system is fixed at an appropriate inspection station. Since the optical detection system itself has a high detection accuracy, the results after multiple measurements are very consistent. Convenient detection: Just lift the nuclear fuel element onto the V-groove and start the equipment to get the result directly. There is no need to manually adjust the dial indicator for detection, which saves time and effort. In addition, it can detect radial runout and directly detect end face runout without changing the equipment. High detection efficiency: Compared with the original detection method, the detection efficiency is increased by 2 times. Reduced labor intensity: The optical detection system is used to directly obtain the detection value, which reduces the time for manual placement and use of the dial indicator, and also reduces the workload and labor intensity.

[0050] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A device for detecting the vibration of a nuclear fuel element rod, characterized in that: The device comprises: a horizontal camera housing, a support plate, a plumb camera, a fixing plate, a plumb camera housing, a pressure wheel, a V-shaped groove, a platform, an auxiliary pressure wheel, an adjustment mechanism, a connecting rod, a support, and a horizontal camera; The horizontal camera cover is arranged outside the horizontal camera, and is used to protect the horizontal camera from being affected by external light when working, and to protect the horizontal camera from being hit; the horizontal camera is fixedly connected to the support, and is fixed by the horizontal camera cover, and is used to measure the end face runout value of the relevant rod of the nuclear fuel element; The lower end of the support plate is fixedly connected to the horizontal camera housing, and the upper end of the support plate is fixedly connected to one side of the fixed plate and supports the fixed plate; the plumb camera is fixedly connected to the other side of the fixed plate and is used to measure the radial runout value of the rods related to the nuclear fuel element; the plumb camera housing is fixed to the plumb camera and is arranged on the outside of the plumb camera to protect the horizontal camera from being affected by external light when working, and protect the plumb camera from being hit; The pressure wheel is provided with a bearing and can realize free rotation. The pressure wheel is fixed on the connecting rod by a pin connection. The relevant rods of the nuclear fuel element to be tested are fastened in the V-groove by the gravity of the pressure wheel. The V-groove is fixedly connected to the platform, the adjustment mechanism is fixed on the support and used to adjust the clamping position. The connecting rod is fixedly connected to the support and pneumatically used to realize the pressing and lifting action of the pressure wheel. The support is fixedly arranged on one side of the platform, and is used for carrying the adjustment mechanism, the connecting rod, and the horizontal camera; the platform is the base of the whole device, and is used for carrying all the parts of the whole device.

2. The device according to claim 1, characterized in that The device also includes: a first power line and a second power line; the first power line is used to supply power to the horizontal camera and support signal transmission of the horizontal camera, and the second power line is used to supply power to the vertical camera and support signal transmission of the vertical camera.

3. The device according to claim 1, characterized in that The material of the platform can be marble.

4. The device according to claim 1, characterized in that The V-shaped groove is connected to fix the auxiliary pressing wheel through a threaded connection, and the auxiliary pressing wheel and the pressing wheel together fasten the related rods of the nuclear fuel element to be tested in the V-shaped groove.

5. A method for detecting the bounce of a nuclear fuel element-related rod, the method further comprising: The following steps are used for measurement: Step 1: Place the workpiece to be tested into the testing device, support and position it with the support seat assembly and the roller support assembly; and position the axial position along the axis direction with the limit assembly; Step 2, respectively adjusting the positions of the radial point laser measurement sensor and the axial point laser measurement sensor so that the measurement points of the two sensors are aligned with the measured points of the workpiece to be measured; Step 3. Click the measurement button to start measuring, press down the pressure wheel and press the workpiece, and rotate the handwheel to drive the pressure wheel to rotate and drive the workpiece to rotate.

6. The method according to claim 1, characterized in that The method further comprises calibrating the device using the following steps; Step 4, using a radial point laser measurement sensor and an axial point laser measurement sensor installed at the end position of the measuring device to measure the radial runout and end face runout of the standard rod respectively; During calibration, place the measuring standard rod into the measuring device, and support and position it with the support seat assembly and the roller support assembly; use the limit assembly to position the axial position along the axis direction; adjust the radial point laser measurement sensor and the axial point laser measurement sensor positions respectively, so that the two sensor measurement points are aligned with the measurement points of the measuring standard rod; click the measurement button to start measuring, press down the pressure wheel and press the measuring standard rod, and at the same time rotate the handwheel to drive the pressure wheel to rotate and drive the measuring standard rod to rotate; Step 5, radial runout measurement repeatability, measuring the radial runout of the end of the standard rod to be measured for a preset number of times, and calculating the measurement repeatability of the measured value as the radial runout measurement repeatability error value of the measuring device; Step 6, radial runout measurement indication error, compare the preset number of radial runouts of the measurement standard rod, the deviation between the measured value and the nominal value, and select the maximum deviation as the radial runout measurement indication error.

Images