Channel type double-station post-combustion fuel rod vertical X-ray CT detection device

Abstract

The utility model provides a channel type double-station post-combustion fuel rod vertical X-ray CT detection device. The channel type double-station post-combustion fuel rod vertical X-ray CT detection device comprises an X-ray tube lifting and moving mechanism, a detector lifting and moving mechanism, a fuel rod detection sealing channel, a fuel rod clamping and rotating mechanism, a fuel rod lifting mechanism, a fuel rod ejection mechanism and a post-combustion nuclear fuel special-shaped part CT detection platform, the device can automatically detect a post-combustion fuel rod, meets the detection of other post-combustion nuclear fuel special-shaped parts, adopts double-station arrangement, greatly enlarges the detection range, is suitable for detection of more different types of workpieces, achieves the performance of one machine with multiple purposes in a specially-arranged detection chamber, greatly reduces the expenditure of additional equipment, saves the cost, and improves the detection efficiency. The device not only can be used for scientific research and development, but also can be widely applied to the detection field in a special environment, and is suitable for wide popularization.

Description

Technical Field

[0001] The utility model relates to the field of X-ray CT nondestructive detection of post-burned fuel rods and post-burned nuclear fuel special-shaped parts, and in particular to a channel-type double-station post-burned fuel rod vertical X-ray CT detection device. Background Art

[0002] Nuclear fuel rods are the unit body that releases heat from the reactor and are the core components of the reactor. Nuclear fuel rods are in a strong neutron field in the reactor, and are subjected to the erosion of high temperature, high pressure, and high flow rate coolants. At the same time, they are subjected to the chemical action of fissionable materials and complex mechanical loads, steam corrosion, and very harsh working conditions, requiring nuclear fuel rods to have high reliability and safety. At present, the domestic nuclear fuel rod end plug weld inspection is a passive fuel rod inspection before the reaction stage in the reactor, that is, pre-combustion fuel rod inspection. Pre-combustion inspection can be carried out in a natural environment. The traditional X-ray angular digital imaging method is mainly used to detect defects in pre-combustion nuclear fuel rods: in a normal inspection room, a long pre-combustion nuclear fuel rod is placed horizontally on a rotating roller platform, and the rotating roller is driven to rotate to drive the pre-combustion nuclear fuel rod to rotate. Each pre-combustion nuclear fuel rod end plug weld imaging requires two rotations of 120 degrees, and a total of three exposures are required to complete the inspection. The operation is complicated and the inspection time is long. The fuel rods after combustion are inherently radioactive and cannot be excessively collided or rolled. CT inspection is required under negative pressure conditions. The inspection space environment needs to be closed and isolated, and there must be a protective isolation room with sufficient radiation protection thickness. This is completely different from the conditions for inspection of fuel rods before combustion. At present, there is no relevant technology for non-destructive inspection of post-combustion fuel rods by using a sealed channel between a hot chamber and a CT inspection chamber. This requires combining the characteristics of the post-combustion fuel rods themselves, the spatial characteristics of the closed inspection protection room, and the comprehensive cost characteristics to develop a new inspection device and inspection method to conduct inspection research on post-combustion fuel rods.

[0003] Researchers need to know the conditions of the burned fuel rods and their components after they have been subjected to the chemical action of the reactor's strong neutron fission materials and complex mechanical loads, the scouring of high-temperature, high-pressure, high-flow coolants, and steam corrosion. At the same time, due to the particularity of the detection environment, it is necessary to build a special detection room underground. In addition, other special-shaped parts of burned nuclear fuel also need to be detected in the underground detection room. This requires equipment that can be suitable for the detection of more different types of workpieces to increase the detection range and achieve the performance of one machine with multiple uses, so as to reduce the expenditure on additional equipment and save costs. This requires the development of new detection equipment that can detect both burned fuel rods and special-shaped parts of burned nuclear fuel to meet the detection needs. CT detection technology can be used to analyze the location and size of defects in detail, helping researchers analyze the causes of defects and thus improve the process. These are all deficiencies and inadequacies of existing technologies, and there is an urgent need for technological innovation based on special requirements. Summary of the invention

[0004] In order to meet the needs and make up for the defects and deficiencies of the existing technology, this patent provides a channel-type dual-station vertical X-ray CT detection device for post-combustion fuel rods. This detection device can perform X-ray CT detection as well as X-ray DR detection, which can meet the needs of X-ray CT scanning detection as well as DR real-time imaging detection.

[0005] The post-burned fuel rod and fuel rod mentioned in this article refer to the same workpiece, and the fuel rod is a simplified name for the same workpiece.

[0006] The technical solution adopted by this patent is: a channel-type double-station post-combustion fuel rod vertical X-ray CT detection device, including: an X-ray tube lifting and moving mechanism, a detector lifting and moving mechanism, a fuel rod detection sealing channel, a fuel rod clamping and rotating mechanism, a fuel rod lifting mechanism, a fuel rod ejection mechanism, and a post-combustion nuclear fuel special-shaped parts CT detection platform. The detection devices are all arranged in an underground detection room, and the X-ray tube lifting and moving mechanism and the detector lifting and moving mechanism are respectively arranged on both sides opposite to each other. A fuel rod clamping and rotating mechanism is provided at the left end of the middle part of the X-ray tube lifting and moving mechanism and the detector lifting and moving mechanism, a fuel rod detection sealing channel is provided at the upper end of the fuel rod clamping and rotating mechanism, a fuel rod ejection mechanism is provided at the lower end of the fuel rod clamping and rotating mechanism, and a post-combustion nuclear fuel special-shaped parts CT detection platform is provided at the right end of the middle part of the X-ray tube lifting and moving mechanism and the detector lifting and moving mechanism;

[0007] The X-ray tube lifting and moving mechanism includes: a marble machine base, a marble transverse machine body, a marble column, a servo motor, a reducer, a fixed end bearing seat, a shaft connector, a combined bearing, a ball screw, a linear guide, a guide slider, a nut, a nut seat, a support end bearing seat, a deep groove ball bearing, a 450KV X-ray tube, a 225KV micro-focus X-ray tube, a 225KV micro-focus X-ray tube fixing seat, a 450KV X-ray tube clamp, a 450KV X-ray tube grating, a X-ray source sliding support frame, a sliding support plate, a slide plate, and a shock-absorbing pad.

[0008] The marble machine base is at the bottom layer, on which a slide plate is installed, on which a marble transverse moving machine body is installed, on which a sliding support plate is connected, on which a marble column is connected, on which a servo motor, a reducer drive, a fixed end bearing seat, a shaft connector, a ball screw, a linear guide, a guide slider, a nut, a nut seat, a supporting end bearing seat, and a deep groove ball bearing are installed in sequence from top to bottom on the marble column. The guide rail slider is connected for transmission; a ray source sliding support frame is installed on the guide rail slider, a 225KV micro-focus X-ray tube fixing seat and a 450KV ray tube clamp are installed on the ray source sliding support frame, a 225KV micro-focus X-ray tube is installed on the 225KV micro-focus X-ray tube fixing seat, a 450KV ray tube is installed on the 450KV ray tube clamp, and a 450KV ray tube grating is provided at the front end of the 450KV ray tube; a shock-absorbing pad is provided at the lower end of the stone machine base;

[0009] The detector lifting and moving mechanism includes two marble machine bases, two marble transverse moving bodies, two marble columns, two servo motors, two reducers, two fixed end bearing seats, two shaft connectors, two combined bearings, two ball screws, two linear guides, two guide slides, two screw nuts, two screw nut seats, two bearing seats at the supporting end, two deep groove ball bearings, a detector sliding support frame, a linear array detector protection box, a planar array detector protection box, an adjustable collimator, a double-moving grating, a planar array detector, a linear array detector, two sliding support plates, two slide plates, and two shock-absorbing washers;

[0010] The marble machine base 2 is at the bottom layer, and the upper plane is provided with a slide plate 2, and the marble transverse moving body 2 is provided on the slide plate 2, and the marble transverse moving body 2 is connected with a sliding support plate 2, and the sliding support plate 2 is provided with a marble column 2, and the marble column 2 is provided with a servo motor 2, a reducer 2, a fixed end bearing seat 2, a shaft connector 2, a combined bearing 2, a ball screw 2, a linear guide 2, a guide slider 2, a nut 2, a nut seat 2, a support end bearing seat 2, and a deep groove ball bearing 2, which are connected and transmitted to each other; on the guide slider 2 A detector sliding support frame is installed, a surface array detector protection box is installed on the upper end of the detector sliding support frame, a surface array detector is installed inside the surface array detector protection box, a double-moving grating is installed outside the surface array detector, and the double-moving grating can electrically adjust the size of the ray receiving port according to detection needs, a linear array detector protection box is installed at the lower end of the detector sliding support frame, a linear array detector is installed in the linear array detector protection box, an adjustable collimator is installed at the front end of the linear array detector, and a second shock-absorbing pad is installed at the lower end of the second marble machine base;

[0011] The fuel rod detection sealing channel includes: hot chamber floor connecting steel plate, guide flange A, cover plate, stainless steel bellows A, connecting guide flange, stainless steel bellows B, sealing cover, rotary chuck, adapter flange, cross bearing, guide flange B, locking flange A, PC tube, guide flange C, main body bracket, turntable sealing cover, locking flange B, supporting main body box; the fuel rod detection sealing channel is mainly the fuel rod detection channel, which is in a negative pressure state from the hot chamber floor to the underground jacking mechanism to prevent radioactive materials from flying out. The supporting main body box is installed and fixed on the embedded plate on the ground of the underground detection room, a main body bracket is installed on the supporting main body box, a turntable sealing cover is installed on the lower end of the main body bracket, a guide flange C is installed on the turntable sealing cover, and a guide flange B is installed on the upper end of the main body bracket. The PC tube is connected to the guide flange B using the locking flange A, and the locking flange B is connected to the guide flange C to form an X-ray detection position channel. A hot chamber floor connecting steel plate and a cover plate are installed on the hot chamber floor, and a guide flange A, a stainless steel corrugated plate A, a connecting guide flange, a stainless steel corrugated plate B, a sealing cover, and a rotary chuck are installed between the hot chamber floor connecting steel plate and the main support; the cross bearing is installed on the main support, and the sealing cover fixes the rotary chuck, the adapter flange, and the cross bearing on the main support to form a sealed channel with the hot chamber;

[0012] The fuel rod clamping and rotating mechanism includes: a high-precision turntable A, four servo motors, and a fixed pressure block; the high-precision turntable A is installed on the supporting main body box, and a servo motor four is connected behind the high-precision turntable A to drive the high-precision turntable A to rotate, the rotary chuck is installed on the surface of the high-precision turntable A, and the fixed pressure block is installed on the main body bracket. The fixed pressure block fixes the high-precision turntable A on the main body bracket and is sealed by the turntable sealing cover;

[0013] The fuel rod lifting mechanism includes a lifting support plate, a servo motor, a coupling, a combination bearing, a ball screw, a nut, a nut seat, a support end bearing seat, a deep groove ball bearing, a slide plate, a pneumatic clamp, a linear guide, a linear guide slider, and a fixed end bearing seat. The main function of the fuel rod lifting mechanism is to transport the fuel rods. A lifting support plate is installed on the inner side of the lower end of the support main body box, and a linear guide, a linear guide slider, a ball screw, a fixed bearing seat support, a deep groove ball bearing, and a support end bearing seat are installed on the lifting support plate. The servo motor is connected to drive in sequence, and a slide plate is installed on the ball screw. A pneumatic clamp is installed on the slide plate. The fuel rod lifting mechanism clamps the workpiece and moves it up and down.

[0014] The fuel rod ejection mechanism includes: a guide cylinder, a fixed flange, a sliding column, a pulley, a wire rope, and an elevator. The fuel rod ejection mechanism is an emergency mechanism. When the equipment fails or the fuel rod falls accidentally, the fuel rod ejection mechanism is activated to eject the fuel rod from the underground of the detection room into the hot room through the sealed channel. The guide cylinder is fixed to the bottom plate of the supporting main box with a fixed flange, and is deep into the pit of the detection room. A sliding column is installed in the guide cylinder, and a pulley is installed on the sliding column. One end of the sliding column is connected to a wire rope, and the other end of the wire rope is connected to the elevator. The elevator is fixed to the bottom plate of the supporting main box. The sliding column can slide up and down in the guide cylinder under the action of the elevator wire rope, and can eject the fallen fuel rod from the detection room into the hot room.

[0015] The CT detection platform for special-shaped parts of post-burned nuclear fuel comprises: a marble body seven, a slide plate seven, a high-precision turntable B, a servo motor seven, a coupling seven, a combined bearing seven, a fixed-end bearing seat seven, a nut seat seven, a nut seven, a deep groove ball bearing seven, a supporting-end bearing seat seven, a linear guide seven, a slider seven, and a ball screw seven; the CT detection platform for special-shaped parts of post-burned nuclear fuel is a CT workstation for special-shaped parts of post-burned nuclear fuel, and a marble body seven is installed on the supporting main body box, and a servo motor seven, a coupling seven, a combined bearing seven, a fixed-end bearing seat seven, a nut seat seven, a nut seven, a deep groove ball bearing seven, a supporting-end bearing seat seven, a linear guide seven, a slider seven, and a ball screw seven are installed on the marble body seven in sequence, a slide plate seven is connected and installed on the linear guide slider seven, and a high-precision turntable B is installed on the slide plate seven, and the CT detection platform for special-shaped parts of post-burned nuclear fuel can carry the workpiece to move horizontally and perform high-precision rotation.

[0016] The dual-tube combination of a 450KV X-ray tube and a 225KV micro-focus X-ray tube can be installed together. Different X-ray machines can be switched for inspection according to different detection requirements. In a special underground detection room, one machine can perform multiple functions and the detection range can be increased.

[0017] A dual detector combination of an area array detector and a linear array detector is installed together as detection detectors. Different detectors can be switched for inspection according to different detection requirements. In a special underground detection room, one machine can perform multiple functions, enhance detection accuracy, and expand the detection range.

[0018] Marble is used as the main material for testing components, effectively preventing damage to components caused by radiation and high temperature.

[0019] The area array detector is arranged inside the area array detector protection box, and a double-moving grating is installed in front of the area array detector. The double-moving grating can electrically adjust the size of the ray receiving port according to the detection needs, effectively protecting the service life of the electronic components of the area array detector and avoiding interference from radiation and negative pressure special environments.

[0020] The linear array detector is fixed in the linear array detector protection box, which effectively protects the service life of the electronic components of the linear array detector and avoids interference from radiation and negative pressure special environments.

[0021] The side walls of the area array detector protection box and the linear array detector protection box are made of a three-layer composite structure of steel plate, lead plate and silicon steel sheet.

[0022] The beneficial technical effects of this patent are:

[0023] The utility model solves the defects and shortcomings of the prior art and provides a channel-type double-station vertical X-ray CT detection device for burned fuel rods, which can automatically detect burned fuel rods and also meet the detection of other burned nuclear fuel special-shaped parts. The double-station setting greatly increases the detection range and is suitable for the detection of more different types of workpieces. The performance of one machine with multiple uses is achieved in a special detection room, which greatly reduces the expenditure on additional equipment and saves costs. The device can not only be used for scientific research and development, but also can be widely used in the detection field under special environments and is suitable for wide promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an axonometric view of the device;

[0025] Figure 2 This is the front view of the whole device;

[0026] Figure 3 This is a front view of the X-ray tube lifting and moving mechanism of the device;

[0027] Fig. 4 is a front view of the detector lifting and moving mechanism of the device;

[0028] Figure 5 This is a front view of the X-ray tube and detector moving mechanism of the device;

[0029] Figure 6This is a front view of the fuel rod detection sealing channel of the device;

[0030] Figure 7 This is a cross-sectional view of the fuel rod detection sealing channel, fuel rod lifting mechanism, and fuel rod ejection mechanism of the device;

[0031] Figure 8 This is a schematic diagram of the fuel rod rotation drive mechanism of the device;

[0032] Fig. 9 This is a schematic diagram of the layout of the fuel rod rotation driven mechanism of the device;

[0033] Fig.10 This is a top view of the CT inspection platform for post-combustion nuclear fuel special-shaped parts of this device;

[0034] Fig.11 This is a cross-sectional view of the CT detection platform for the post-combustion nuclear fuel special-shaped parts of this device;

[0035] In the figure: 1. X-ray tube lifting and moving mechanism, 2. Detector lifting and moving mechanism, 3. Fuel rod detection sealing channel, 4. Fuel rod clamping and rotating mechanism, 5. Fuel rod lifting mechanism, 6. Fuel rod ejection mechanism, 7. CT detection platform for post-combustion nuclear fuel special-shaped parts, 101. Marble machine base, 102. Marble horizontal movement machine body, 103. Marble column, 104. Servo motor, 105. Reducer, 106. Fixed end bearing seat, 107. Shaft connector, 108. Combined bearing, 109. Ball screw, 110. Linear guide, 111. Guide slider, 112. Nut, 113. Nut seat, 114. Support end bearing seat, 115. Deep groove ball bearing, 116. 450 KV ray tube, 117, 225KV micro-focus X-ray tube, 118, 225KV micro-focus X-ray tube fixed seat, 119, 450KV ray tube clamp, 120, 450KV ray tube grating, 121, ray source sliding support frame, 122, sliding support plate one, 123, slide plate one, 124, shock-absorbing pad one, 201, marble machine base two, 202, marble transverse machine body two, 203, marble column two, 204, servo motor two, 205, reducer two, 206, fixed end bearing seat two, 207, shaft connector two, 208, combined bearing two, 209, ball screw two, 210, linear guide rail two, 211, guide rail slider two, 212, nut two, 213, nut seat two, 214 , bearing seat at the supporting end 2, 215, deep groove ball bearing 2, 216, detector sliding support frame, 217, linear array detector protection box, 218, area array detector protection box, 219, adjustable collimator, 220, double-moving grating, 221, area array detector, 222, linear array detector, 223, sliding support plate 2, 204, slide plate 2, 225, shock-absorbing pad 2, 301, hot chamber floor connecting steel plate, 302, guide flange A, 303, cover plate, 304, stainless steel bellows A, 305, connecting guide flange, 306, stainless steel bellows B, 307, sealing cover, 308, rotary chuck, 309, adapter flange, 310, cross bearing, 311, guide flange B, 312, locking flange A, 313, locking flange A, 314, locking flange B, 315, locking flange A, 316, locking flange B, 317, locking flange A, 318, locking flange B, 319, locking flange B, 320, locking flange A, 321, locking flange B, 322, locking flange A, 323, locking flange B, 324, locking flange A, 325, locking flange B, 326, locking flange A, 327, locking flange B, 328, locking flange B, 329, locking flange B, 330, locking flange A, 331, locking flange B, 332, locking flange A, 333, locking flange B, 334, locking flange A, 335, locking flange B, 336, locking flange B, 337, locking flange A, 338, locking flange B, 339, locking flange B, 340, locking flange B, 341, locking flange B, 342, locking flange 3. PC tube, 314. Guide flange C, 315. Main bracket, 316. Turntable sealing cover, 317. Locking flange B, 318. Support main box, 401. High-precision turntable A, 402. Servo motor four, 403. Fixed pressure block, 501. Lifting support plate, 502. Servo motor five, 503. Connector five, 504. Combined bearing five, 505. Ball screw five, 506. Nut five, 507. Nut seat five, 508. Support end bearing seat five, 509. Deep groove ball bearing five, 510. Slide plate five, 511. Pneumatic clamp, 512. Linear guide five, 513. Linear guide slider five, 514. Fixed end bearing seat five, 601. Guide cylinder, 602. Fixed flange, 603. Sliding column,604, pulley, 605, wire rope, 606, elevator, 701, marble body seven, 702, skateboard seven, 703, high-precision turntable B, 704, servo motor seven, 705, shaft connector seven, 706, combined bearing seven, 707, fixed end bearing seat seven, 708, nut seat seven, 709, nut seven, 710, deep groove ball bearing seven, 711, support end bearing seat seven, 712, linear guide seven, 713, slider seven, 714, ball screw seven. , DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0037] A channel-type double-station vertical X-ray CT detection device for post-combustion fuel rods comprises: an X-ray tube lifting and moving mechanism 1, a detector lifting and moving mechanism 2, a fuel rod detection sealing channel 3, a fuel rod clamping and rotating mechanism 4, a fuel rod lifting mechanism 5, a fuel rod ejection mechanism 6, and a post-combustion nuclear fuel special-shaped part CT detection platform 7. The detection devices are all arranged in an underground detection room, the X-ray tube lifting and moving mechanism 1 and the detector lifting and moving mechanism 2 are respectively arranged on both sides opposite to each other, a fuel rod clamping and rotating mechanism 4 is provided at the left end of the middle part of the X-ray tube lifting and moving mechanism 1 and the detector lifting and moving mechanism 2, a fuel rod detection sealing channel 3 is provided at the upper end of the fuel rod clamping and rotating mechanism 4, a fuel rod ejection mechanism 6 is provided at the lower end of the fuel rod clamping and rotating mechanism 4, and a post-combustion nuclear fuel special-shaped part CT detection platform 7 is provided at the right end of the middle part of the X-ray tube lifting and moving mechanism 1 and the detector lifting and moving mechanism 2.

[0038] The slender fuel rod passes through the fuel rod detection sealing channel 3 in the hot chamber, and the fuel rod clamping and rotating mechanism 4 drives the fuel rod to perform CT rotation. After a section of detection is completed, the fuel rod lifting mechanism 5 clamps the fuel rod, and the fuel rod clamping and rotating mechanism 4 releases the fuel rod. After the fuel rod lifting mechanism 5 drives the fuel rod to the next detection position, the fuel rod clamping and rotating mechanism 4 clamps the fuel rod, and the fuel rod lifting mechanism 5 releases the fuel rod to carry out CT detection of the next section of fuel rods; when it is necessary to detect the special-shaped parts of post-burned nuclear fuel, the special-shaped parts of post-burned nuclear fuel are placed on the high-precision turntable 703 of the post-burned nuclear fuel special-shaped parts CT detection platform 7, and the non-standard post-burned nuclear fuel special-shaped workpieces are CT detected by moving and rotating the high-precision turntable 703.

[0039] The X-ray tube lifting and moving mechanism 1 includes: a marble machine base 101, a marble transverse machine body 102, a marble column 103, a servo motor 104, a reducer 105, a fixed end bearing seat 106, a shaft connector 107, a combined bearing 108, a ball screw 109, a linear guide 110, a guide slider 111, a nut 112, a nut seat 113, a support end bearing seat 114, a deep groove ball bearing 115, a 450KV X-ray tube 116, a 225KV micro-focus X-ray tube 117, a 225KV micro-focus X-ray tube fixed seat 118, a 450KV X-ray tube clamp 119, a 450KV X-ray tube grating 120, a ray source sliding support frame 121, a sliding support plate 122, a slide plate 123, and a shock-absorbing pad 124;

[0040] The marble machine base 101 is at the bottom layer, on which a slide plate 123 is installed, on which a marble transverse moving machine body 102 is installed, on which a sliding support plate 122 is connected, on which a marble column 103 is connected, and on which a servo motor 104, a reducer 105 drive, a fixed end bearing seat 106, a shaft connector 107, a ball screw 109, a linear guide rail 110, a guide rail slider 111, a nut 112, a nut seat 113, and a supporting end bearing seat 114 are sequentially installed from top to bottom. , deep groove ball bearings 115, which are connected to each other for transmission; a ray source sliding support frame 121 is installed on the guide rail slider 111, a 225KV micro-focus X-ray tube fixing seat 118 and a 450KV ray tube clamp 119 are installed on the ray source sliding support frame 121, a 225KV micro-focus X-ray tube 117 is installed on the 225KV micro-focus X-ray tube fixing seat 118, a 450KV ray tube 116 is installed on the 450KV ray tube clamp 119, and a 450KV ray tube grating 120 is provided at the front end of the 450KV ray tube 116; a shock-absorbing pad 124 is provided at the lower end of the stone machine base 101;

[0041] The marble transverse body 102 is driven to move along the front-rear direction by means of the slide plate 123 to carry the components thereon, and the distance between the ray tube and the workpiece is adjusted to adjust the focal length; the sliding support plate 122 carries the components thereon to move along the left-right direction, and the left-right distance between the ray tube and the workpiece is adjusted to adjust the center of alignment, and the position of the CT detection platform 7 for detecting the post-burned nuclear fuel shaped parts is switched to be detected; the ray source sliding support frame 121 carries the components thereon to move along the up-down direction, and the height of the ray tube is adjusted in real time to meet the detection requirements;

[0042] The X-ray tube lifting and moving mechanism 1 can drive the X-ray source to switch arbitrarily between the fuel rod detection station and the post-combustion nuclear fuel special-shaped parts detection station. The 450KV X-ray tube 116 is fixed on the X-ray source sliding support frame 121 by the 450KV X-ray tube clamp 119, and the 225KV micro-focus X-ray tube 117 is fixed on the X-ray source sliding support frame 121 by the 225KV micro-focus X-ray tube fixing seat 118 and is arranged up and down with the 450KV X-ray tube 119.

[0043] The detector lifting and moving mechanism includes a marble machine base 201, a marble transverse body 202, a marble column 203, a servo motor 204, a reducer 205, a fixed end bearing seat 206, a shaft connector 207, a combined bearing 208, a ball screw 209, a linear guide 210, a guide slider 211, a nut 212, a nut seat 213, a support end bearing seat 214, a deep groove ball bearing 215, a detector sliding support frame 216, a linear array detector protection box 217, a planar array detector protection box 218, an adjustable collimator 219, a double-moving grating 220, a planar array detector 221, a linear array detector 222, a sliding support plate 223, a slide plate 224, and a shock-absorbing pad 225.

[0044] The marble machine base 201 is at the bottom layer, and a slide plate 224 is installed on the upper plane. A marble transverse moving body 202 is installed on the slide plate 224. A sliding support plate 223 is connected to the marble transverse moving body 202. A marble column 203 is installed on the sliding support plate 223. A servo motor 204, a reducer 205, a fixed end bearing seat 206, a shaft connector 207, a combined bearing 208, a ball screw 209, a linear guide 210, a guide slider 211, a nut 212, a nut seat 213, a supporting end bearing seat 214, and a deep groove ball bearing 215 are installed on the marble column 203 from top to bottom, and are connected to each other for transmission; A detector sliding support frame 216 is installed on the guide rail slider 211, a surface array detector protection box 218 is installed on the upper end of the detector sliding support frame 216, a surface array detector 221 is installed inside the surface array detector protection box 218, a double-moving grating 220 is installed outside the surface array detector 221, and the double-moving grating 220 can electrically adjust the size of the ray receiving port according to detection needs, a linear array detector protection box 222 is installed at the lower end of the detector sliding support frame 216, and a linear array detector 222 is installed in the linear array detector protection box 222, an adjustable collimator 219 is installed at the front end of the linear array detector 222, and a shock-absorbing pad 225 is installed at the lower end of the marble machine base 201;

[0045] The marble transverse body 202 carries the components thereon and moves along the front-rear direction through the slide plate 224 to adjust the distance from the detector to the workpiece. The sliding support plate 223 carries the components thereon and moves along the left-right direction to adjust the left-right distance from the detector to the workpiece, adjusts the alignment center, and switches to the CT detection platform 7 for detecting post-combustion nuclear fuel special-shaped parts for detection. The components on the carrying surface of the detector sliding support frame 216 move along the up-down direction, and the detector height is adjusted in real time to meet the detection requirements.

[0046] The area array detector 221 is arranged inside the area array detector protection box 218, and a double-moving grating 220 is installed in front of the area array detector 221. The double-moving grating 220 can electrically adjust the size of the ray receiving port according to detection needs, effectively protecting the service life of the electronic components of the area array detector 221 and avoiding interference from radiation and negative pressure special environments.

[0047] The linear array detector 222 is fixed in the linear array detector protection box 217, which effectively protects the service life of the electronic components of the linear array detector 222 and avoids interference from radiation and negative pressure special environment.

[0048] The side walls of the area array detector protection box 218 and the linear array detector protection box 217 are made of a three-layer composite structure of steel plate, lead plate and silicon steel sheet.

[0049] The fuel rod detection sealing channel 3 includes: a hot chamber floor connecting steel plate 301, a guide flange A302, a cover plate 303, a stainless steel bellows A304, a connecting guide flange 305, a stainless steel bellows B306, a sealing cover 307, a rotary chuck 308, an adapter flange 309, a cross bearing 310, a guide flange B311, a locking flange A312, a PC tube 313, a guide flange C314, a main body bracket 315, a turntable sealing cover 316, a locking flange B317, and a supporting main body box 318; the fuel rod detection sealing channel 3 is mainly a fuel rod detection channel, and the inside of the underground jacking mechanism from the hot chamber floor to the detection is in a negative pressure state to prevent radioactive substances from flying out. The supporting main box 318 is installed and fixed on the embedded plate on the ground of the underground detection room, a main frame 315 is installed on the supporting main box 318, a turntable sealing cover 316 is installed on the lower end of the main frame 315, a guide flange C314 is installed on the turntable sealing cover 316, and a guide flange B311 is installed on the upper end of the main frame 315. The PC tube 313 is connected to the guide flange B311 using a locking flange A312, and the locking flange B317 is connected to the guide flange C314 to form an X-ray detection position channel. A hot chamber floor connecting steel plate 301 and a cover plate 303 are installed on the hot chamber floor; a guide flange A302, a stainless steel corrugated plate A304, a connecting guide flange 305, a stainless steel corrugated plate B306, a sealing cover 307, and a rotary chuck 308 are installed between the hot chamber floor connecting steel plate 301 and the main support 315; a cross bearing 310 is installed on the main support 315, and the sealing cover 307 fixes the rotary chuck 308, the adapter flange 309, and the cross bearing 310 on the main support 315 to form a sealed channel with the hot chamber.

[0050] The fuel rod clamping and rotating mechanism includes: a high-precision turntable A401, a servo motor 402, and a fixed pressure block 403; a high-precision turntable A401 is installed on the supporting main body box 318, and a servo motor 402 is connected to the back of the high-precision turntable A401 to drive the high-precision turntable A401 to rotate, a rotary chuck 308 is installed on the surface of the high-precision turntable A401, and the fixed pressure block 403 is installed on the main body bracket 315. The fixed pressure block 403 fixes the high-precision turntable A401 on the main body bracket 315 and is sealed by the turntable sealing cover 316.

[0051] The fuel rod lifting mechanism 5 includes a lifting support plate 501, a servo motor 502, a coupling 5, 503, a combined bearing 504, a ball screw 505, a nut 506, a nut seat 507, a support end bearing seat 508, a deep groove ball bearing 509, a slide plate 510, a pneumatic clamp 511, a linear guide 512, a linear guide slider 513, and a fixed end bearing seat 514. The main function of the fuel rod lifting mechanism 5 is to transport the fuel rods. A lifting support plate 501 is installed on the inner side of the lower end, and a linear guide rail 512, a linear guide slider 513, a ball screw 505, a fixed bearing seat support 514, a deep groove ball bearing 509, and a support end bearing seat 508 are installed on the lifting support plate 501. The servo motor 502 is connected to drive in sequence, and a slide plate 510 is installed on the ball screw 505. A pneumatic clamp 511 is installed on the slide plate 510. The fuel rod lifting mechanism 5 clamps the workpiece and moves up and down.

[0052] The fuel rod ejection mechanism 6 includes: a guide cylinder 601, a fixed flange 602, a slide column 603, a pulley 604, a wire rope 605, and an elevator 606; the fuel rod ejection mechanism is an emergency mechanism. When the equipment fails or the fuel rod falls accidentally, the fuel rod ejection mechanism is activated to eject the fuel rod from the underground of the detection chamber through the sealed channel to the hot chamber. The guide cylinder 601 is fixed to the bottom plate of the supporting main body box 318 with a fixed flange 602, and is deep into the pit of the detection chamber. A slide column 603 is installed in the guide cylinder 601, and a pulley 604 is installed on the slide column 603. One end of the slide column 603 is connected with a wire rope 605, and the other end of the wire rope 605 is connected to the elevator 606, and the elevator 606 is fixed to the bottom plate of the supporting main body box 318; the slide column 603 can slide up and down in the guide cylinder 601 under the action of the wire rope 605 of the elevator 606, and the fallen fuel rod can be ejected from the detection chamber to the hot chamber.

[0053] The CT inspection platform 7 for special-shaped parts of post-burned nuclear fuel includes: a marble body 701, a slide plate 702, a high-precision turntable B703, a servo motor 704, a coupling 705, a combined bearing 706, a fixed-end bearing seat 707, a nut seat 708, a nut 709, a deep groove ball bearing 710, a supporting-end bearing seat 711, a linear guide 712, a slider 713, and a ball screw 714. The CT inspection platform 7 for special-shaped parts of post-burned nuclear fuel is a CT station for special-shaped parts of post-burned nuclear fuel. The marble body 7701 is installed on the supporting main body box 318. 01, a servo motor 7704, a coupling 7705, a combined bearing 7706, a fixed-end bearing seat 7707, a nut seat 7708, a nut 7709, a deep groove ball bearing 7710, a supporting-end bearing seat 7711, a linear guide 7712, a slider 7713, and a ball screw 7714 are sequentially mounted on the marble body 7701, a slide plate 7702 is connected and mounted on the linear guide slider 7713, a high-precision turntable B703 is mounted on the slide plate 7702, and the CT detection platform 7 for special-shaped parts of post-combustion nuclear fuel can carry the workpiece to move horizontally and perform high-precision rotation.

[0054] The dual-ray tube combination of 450KV ray tube 116 and 225KV micro-focus X-ray tube 117 can be installed together. Different ray machines can be switched for inspection according to different detection requirements. In a special underground detection room, one machine can perform multiple functions and the detection range can be increased.

[0055] By using a dual detector combination of a planar array detector 221 and a linear array detector 222 installed together as detection detectors, different detectors can be switched for inspection according to different detection requirements. In a special underground detection room, one machine can perform multiple functions, enhance detection accuracy, and increase the detection range.

[0056] Marble is used as the main material for testing components, effectively preventing damage to components caused by radiation and high temperature.

[0057] A channel-type double-station vertical X-ray CT detection device for post-burning fuel rods, wherein the detection method for the post-burning fuel rods is as follows: the first step: the X-ray tube lifting and moving mechanism 1 is adjusted and positioned, and the X-ray tube is selected according to the specifications of the workpiece to be detected, and the 450KV X-ray tube 116 or the 225KV micro-focus X-ray tube 117 is selected and moved to the initial detection position;

[0058] Step 2: The detector lifting and moving mechanism 2 is adjusted and positioned, and a detector is selected according to the specifications of the workpiece to be detected, and the area array detector 221 or the line array detector 222 is selected as the detection detector, and moved to the initial position corresponding to the ray tube;

[0059] Step 3: The dedicated conveying manipulator clamps the slender fuel rod on the fuel rod clamping rotating mechanism 4 through the fuel rod detection sealing channel 3 in the hot chamber;

[0060] Step 4: Turn on the ray tube and detector, turn on the fuel rod clamping and rotating mechanism 4, and rotate the fuel rod workpiece for CT detection and imaging. The remote workbench on the ground performs real-time image analysis and processing and archives it;

[0061] Step 5: turn off the ray tube and the detector, stop the fuel rod clamping and rotating mechanism 4, clamp the fuel rod by the fuel rod lifting mechanism 5, release the fuel rod by the fuel rod clamping and rotating mechanism 4, and drive the fuel rod to move up and down. After moving to the next detection position, the fuel rod clamping and rotating mechanism 4 works to clamp the fuel rod, and the fuel rod lifting mechanism 5 releases the fuel rod;

[0062] Step 6: Turn on the ray tube and detector again, turn on the fuel rod clamping and rotating mechanism 4 to select the working state, and rotate the fuel rod workpiece to the second position for CT detection imaging. The remote workbench on the ground performs real-time image analysis and processing and archives it;

[0063] Step 7: Repeat steps 3 to 6 until the fuel rod detection is completed, turn off the radiation source and detector, release the fuel rod clamping and rotating mechanism 4, and take away the slender fuel rod with a special conveying robot.

[0064] A channel-type double-station vertical X-ray CT detection device for post-burned fuel rods, wherein the detection method for post-burned nuclear fuel irregular parts is as follows: the first step: the X-ray tube lifting and moving mechanism 1 is adjusted and positioned, and the X-ray tube is selected according to the specifications of the workpiece to be detected, and the 450KV X-ray tube 116 or the 225KV micro-focus X-ray tube 117 is selected and moved to the initial detection position;

[0065] Step 2: The detector lifting and moving mechanism 2 is adjusted and positioned, and a detector is selected according to the specifications of the workpiece to be detected, and the area array detector 221 or the line array detector 222 is selected as the detection detector, and moved to the initial position corresponding to the ray tube;

[0066] Step 3: The special conveying manipulator places the post-burned nuclear fuel shaped parts on the high-precision turntable B703 of the post-burned nuclear fuel shaped parts CT inspection platform 7;

[0067] Step 4: Start the ray tube and detector, start the CT detection platform 7 for the post-burned nuclear fuel shaped parts, and perform CT detection imaging on the post-burned nuclear fuel shaped parts in rotation. The remote workbench on the ground performs real-time image analysis and processing and archives the images;

[0068] Step 5: After the detection of the post-burned nuclear fuel shaped parts is completed, the ray source and the detector are turned off, the post-burned nuclear fuel shaped parts CT detection platform 7 is stopped from working, and the post-burned nuclear fuel shaped parts are taken away by a special conveying manipulator.

[0069] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0070] In the description of this patent, the terms "upper", "lower", "left", "right", "horizontal", "inner", "outer", "one end", "the other end" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting this patent. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0071] In addition, it should be noted that in the description of this patent, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in this patent can be understood according to the specific circumstances.

[0072] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A channel-type dual-station vertical X-ray CT detection device for post-combustion fuel rods, characterized in that: include: An X-ray tube lifting and moving mechanism, a detector lifting and moving mechanism, a fuel rod detection sealing channel, a fuel rod clamping and rotating mechanism, a fuel rod lifting and moving mechanism, a fuel rod ejecting mechanism, and a CT detection platform for post-combustion nuclear fuel shaped parts; the detection devices are all arranged in an underground detection room, the X-ray tube lifting and moving mechanism and the detector lifting and moving mechanism are respectively arranged on both sides opposite to each other, a fuel rod clamping and rotating mechanism is arranged at the left end of the middle part of the X-ray tube lifting and moving mechanism and the detector lifting and moving mechanism, a fuel rod detection sealing channel is arranged at the upper end of the fuel rod clamping and rotating mechanism, a fuel rod ejecting mechanism is arranged at the lower end of the fuel rod clamping and rotating mechanism, and a CT detection platform for post-combustion nuclear fuel shaped parts is arranged at the right end of the middle part of the X-ray tube lifting and moving mechanism and the detector lifting and moving mechanism; The X-ray tube lifting and moving mechanism includes: a marble machine base, a marble transverse machine body, a marble column, a servo motor, a reducer, a fixed end bearing seat, a shaft connector, a combined bearing, a ball screw, a linear guide, a guide slider, a nut, a nut seat, a support end bearing seat, a deep groove ball bearing, a 450KV X-ray tube, a 225KV micro-focus X-ray tube, a 225KV micro-focus X-ray tube fixing seat, a 450KV X-ray tube clamp, a 450KV X-ray tube grating, a X-ray source sliding support frame, a sliding support plate, a slide plate, and a shock-absorbing pad. The marble machine base is at the bottom layer, on which a slide plate is installed, on which a marble transverse moving machine body is installed, on which a sliding support plate is connected, on which a marble column is connected, on which a servo motor, a reducer drive, a fixed end bearing seat, a shaft connector, a ball screw, a linear guide, a guide slider, a nut, a nut seat, a supporting end bearing seat, and a deep groove ball bearing are installed in sequence from top to bottom on the marble column. The guide rail slider is connected for transmission; a ray source sliding support frame is installed on the guide rail slider, a 225KV micro-focus X-ray tube fixing seat and a 450KV ray tube clamp are installed on the ray source sliding support frame, a 225KV micro-focus X-ray tube is installed on the 225KV micro-focus X-ray tube fixing seat, a 450KV ray tube is installed on the 450KV ray tube clamp, a 450KV ray tube grating is provided at the front end of the 450KV ray tube, and a shock-absorbing pad is provided at the lower end of the stone machine base; The detector lifting and moving mechanism includes: two marble machine bases, two marble transverse moving bodies, two marble columns, two servo motors, two reducers, two fixed end bearing seats, two shaft connectors, two combined bearings, two ball screws, two linear guides, two guide slides, two nuts, two nut seats, two bearing seats at the supporting end, two deep groove ball bearings, a detector sliding support frame, a linear array detector protection box, a planar array detector protection box, an adjustable collimator, a double-moving grating, a planar array detector, a linear array detector, two sliding support plates, two slide plates, and two shock-absorbing washers; The marble machine base 2 is at the bottom layer, and the upper plane is provided with a slide plate 2, and the marble transverse moving body 2 is provided on the slide plate 2, and the marble transverse moving body 2 is connected with a sliding support plate 2, and the sliding support plate 2 is provided with a marble column 2, and the marble column 2 is provided with a servo motor 2, a reducer 2, a fixed end bearing seat 2, a shaft connector 2, a combined bearing 2, a ball screw 2, a linear guide 2, a guide slider 2, a nut 2, a nut seat 2, a support end bearing seat 2, and a deep groove ball bearing 2, which are connected and transmitted to each other; on the guide slider 2 A detector sliding support frame is installed, a surface array detector protection box is installed on the upper end of the detector sliding support frame, a surface array detector is installed inside the surface array detector protection box, a double-moving grating is installed outside the surface array detector, and the double-moving grating can electrically adjust the size of the ray receiving port according to detection needs, a linear array detector protection box is installed at the lower end of the detector sliding support frame, a linear array detector is installed in the linear array detector protection box, an adjustable collimator is installed at the front end of the linear array detector, and a second shock-absorbing pad is installed at the lower end of the second marble machine base; The fuel rod detection sealing channel includes: hot chamber floor connecting steel plate, guide flange A, cover plate, stainless steel bellows A, connecting guide flange, stainless steel bellows B, sealing cover, rotary chuck, adapter flange, cross bearing, guide flange B, locking flange A, PC tube, guide flange C, main body bracket, turntable sealing cover, locking flange B, supporting main body box. The fuel rod detection sealing channel is mainly the fuel rod detection channel, which is in a negative pressure state from the hot chamber floor to the underground jacking mechanism to prevent radioactive substances from flying out; the supporting main body box is installed and fixed on the pre-buried plate on the ground of the underground detection room, and a main body bracket is installed on the supporting main box, and a main body bracket is installed at the lower end of the main body bracket. A turntable sealing cover is installed, a guide flange C is installed on the turntable sealing cover, a guide flange B is installed on the upper end of the main support, the PC tube is connected with the guide flange B using a locking flange A, and the locking flange B is connected with the guide flange C to form an X-ray detection position channel; a hot room floor connecting steel plate and a cover plate are installed on the hot room floor, and a guide flange A, a stainless steel corrugated plate A, a connecting guide flange, a stainless steel corrugated plate B, a sealing cover, and a rotary chuck are installed between the hot room floor connecting steel plate and the main support; a cross bearing is installed on the main support, and the sealing cover fixes the rotary chuck, the adapter flange, and the cross bearing on the main support to form a sealed channel with the hot room; The fuel rod clamping and rotating mechanism includes: a high-precision turntable A, four servo motors, and a fixed pressure block; the high-precision turntable A is installed on the supporting main body box, and a servo motor four is connected behind the high-precision turntable A to drive the high-precision turntable A to rotate, the rotary chuck is installed on the surface of the high-precision turntable A, and the fixed pressure block is installed on the main body bracket. The fixed pressure block fixes the high-precision turntable A on the main body bracket and is sealed by the turntable sealing cover; The fuel rod lifting mechanism includes a lifting support plate, a servo motor, a coupling, a combination bearing, a ball screw, a nut, a nut seat, a support end bearing seat, a deep groove ball bearing, a slide plate, a pneumatic clamp, a linear guide, a linear guide slider, and a fixed end bearing seat. The main function of the fuel rod lifting mechanism is to transport the fuel rods. A lifting support plate is installed on the inner side of the lower end of the support main body box. The lifting support plate is equipped with a linear guide, a linear guide slider, a ball screw, a fixed bearing seat support, a deep groove ball bearing, and a support end bearing seat. The servo motor is connected to drive in sequence. A slide plate is installed on the ball screw, and a pneumatic clamp is installed on the slide plate. The fuel rod lifting mechanism clamps the workpiece and moves up and down. The fuel rod ejection mechanism includes: a guide cylinder, a fixed flange, a sliding column, a pulley, a steel wire rope, and an elevator. The fuel rod ejection mechanism is an emergency mechanism. When the equipment fails or the fuel rod falls accidentally, the fuel rod ejection mechanism is activated to eject the fuel rod from the underground of the detection room into the hot room through the sealed channel. The guide cylinder is fixed to the bottom plate of the supporting main body box with a fixed flange, and is deep into the pit of the detection room. A sliding column is installed in the guide cylinder, and a pulley is installed on the sliding column. One end of the sliding column is connected to a steel wire rope, and the other end of the steel wire rope is connected to the elevator. The elevator is fixed to the bottom plate of the supporting main body box. The sliding column can slide up and down in the guide cylinder under the action of the elevator steel wire rope, and can eject the fallen fuel rod from the detection room to the hot room. The CT detection platform for special-shaped parts of post-burned nuclear fuel comprises: a marble body seven, a slide plate seven, a high-precision turntable B, a servo motor seven, a coupling seven, a combined bearing seven, a fixed-end bearing seat seven, a nut seat seven, a nut seven, a deep groove ball bearing seven, a supporting-end bearing seat seven, a linear guide seven, a slider seven, and a ball screw seven; the CT detection platform for special-shaped parts of post-burned nuclear fuel is a CT workstation for special-shaped parts of post-burned nuclear fuel, and a marble body seven is installed on the supporting main body box, and a servo motor seven, a coupling seven, a combined bearing seven, a fixed-end bearing seat seven, a nut seat seven, a nut seven, a deep groove ball bearing seven, a supporting-end bearing seat seven, a linear guide seven, a slider seven, and a ball screw seven are installed on the marble body seven in sequence, a slide plate seven is connected and installed on the linear guide slider seven, and a high-precision turntable B is installed on the slide plate seven, and the CT detection platform for special-shaped parts of post-burned nuclear fuel can carry the workpiece to move horizontally and perform high-precision rotation.

2. According to claim 1, a channel-type double-station vertical X-ray CT detection device for post-combustion fuel rods is characterized in that: A dual-tube combination of a 450KV ray tube and a 225KV micro-focus X-ray tube is installed together.

3. The channel-type double-station vertical X-ray CT detection device for post-combustion fuel rods according to claim 1 is characterized in that: A dual detector combination method is adopted in which a planar array detector and a linear array detector are installed together as detection detectors.

4. The channel-type double-station vertical X-ray CT detection device for post-combustion fuel rods according to claim 1 is characterized in that: Marble material is used as the main testing component material.

5. The channel-type double-station vertical X-ray CT detection device for post-combustion fuel rods according to claim 1 is characterized in that: The area array detector is arranged inside the area array detector protection box, and a double-moving grating is installed in front of the area array detector. The double-moving grating can electrically adjust the size of the ray receiving port according to detection needs.

6. The channel-type double-station vertical X-ray CT detection device for post-combustion fuel rods according to claim 1, characterized in that: The linear array detector is fixed in the linear array detector protection box.

7. The channel-type double-station vertical X-ray CT detection device for post-combustion fuel rods according to claim 1 is characterized in that: The side walls of the area array detector protection box and the linear array detector protection box are made of a three-layer composite structure of steel plate, lead plate and silicon steel sheet.

Images