Conversion device and ray detection system

Abstract

The invention provides a conversion device, the conversion device is used for rotating a to-be-detected piece, the conversion device comprises a base, a gear box is arranged on the base, and a plurality of clamping jaws are arranged on the outer side wall of the gear box; the clamping jaws are used for clamping the first ends of the to-be-detected pieces, and the gear box drives the multiple clamping jaws to rotate at the same time so that the multiple to-be-detected pieces can rotate synchronously. The ray detection system comprises focusing equipment and any one of the conversion devices. Through the application of the conversion device in a ray detection system, ray nondestructive detection of workpieces made of special materials or with large shape differences is realized; matched tools do not need to be manufactured for different pieces to be detected, and the detection cost is greatly reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of non-destructive testing, and specifically relates to a conversion device and a ray detection system. Background Art

[0002] New, efficient and multifunctional radiographic detection technology has always been the key to the development of my country's new generation of fuel elements. Generally speaking, X-ray or gamma-ray imaging film imaging studies are required for common girth welds and plugging welds of rod-shaped elements to determine the reliability of welding quality.

[0003] When using related medium and low energy X-ray detection systems to detect workpieces with special materials or large differences in shape, it is necessary to separately process the matching tooling, resulting in a significant increase in detection costs. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present application is to provide a conversion device and a radiation detection system that can be adapted to the radiation detection system to achieve radiation non-destructive detection of workpieces with special materials or large shape differences.

[0005] In order to solve the above problems, the first aspect of the present application provides a conversion device, which is used to rotate the part to be detected. The conversion device includes a base, a gear box is provided on the base, and a plurality of claws are provided on the outer wall of the gear box; the claws are used to clamp the first end of the part to be detected, and the gear box drives the plurality of claws to rotate simultaneously so that the plurality of parts to be detected rotate synchronously.

[0006] Optionally, the gearbox includes a box body and a rack, the box body is arranged on the base, and multiple driven gear shafts and a main gear shaft are arranged in the box body, the main gear shaft and the driven gear shaft rotate relative to the box body, the driven gear shaft and the main gear shaft are respectively connected to the claws, the rack is arranged on the base and simultaneously meshes with the gear teeth of the main gear shaft and the driven gear shaft, and the main gear shaft is used to drive the rack to move so that the multiple driven gear shafts rotate synchronously with the main gear shaft.

[0007] Optionally, the conversion device further includes a first driving member, which is disposed on the base, and an output shaft of the first driving member is connected to the driving gear shaft on the gear box.

[0008] A second aspect of the present application provides a radiation detection system, comprising a focusing device and a conversion device as described above, wherein the focusing device is arranged relative to the conversion device, the focusing device comprises a guide groove, a guide block and a compensation component, the compensation component comprises a first side portion and a second side portion, the first side portion and / or the second side portion is connected to one end of the guide block, the other end of the guide block cooperates with the guide groove, and the guide groove is used to drive the guide block to move to adjust the height of the compensation component.

[0009] Optionally, the guide groove is a wave-shaped guide groove.

[0010] Optionally, the compensation component includes an end fixing plate and a compensation cover plate, and the compensation cover plate and the end fixing plate are both provided with compensation grooves. The compensation cover plate is buckled on the end fixing plate so that the compensation groove on the compensation cover plate and the compensation groove on the end fixing plate are aligned to form a compensation hole, the second end of the part to be detected is inserted into the corresponding compensation hole, and the end fixing plate is connected to the corresponding guide block.

[0011] Optionally, the focusing device further comprises a base, a limiting column is arranged on the base, a limiting hole is opened on the end fixing plate, the limiting column is arranged in the limiting hole, so that the compensation component moves up and down along the limiting column.

[0012] Optionally, the focusing device further includes a pushing portion, the guide groove is located at the upper end of the base and is connected to the pushing portion, and the pushing portion drives the guide groove to move along the base toward or away from one side of the conversion device.

[0013] Optionally, the pushing part includes a second driving member, a transmission assembly and a pushing frame, the second driving member is arranged on the base, the output end of the second driving member is connected to one end of the transmission assembly, the other end of the transmission assembly is connected to the pushing frame, and the guide groove is arranged on the pushing frame.

[0014] Optionally, slide grooves are provided on both side end surfaces of the base, and the push frame includes a slider, and the slider on the push frame is arranged in the slide grooves on the base.

[0015] Beneficial Effects

[0016] A conversion device and a radiation detection system provided in the embodiments of the present invention install the conversion device on the radiation detection system, clamp one end of the workpiece to be detected by the conversion device, and insert the other end of the workpiece to be detected on the focusing device, thereby realizing radiation non-destructive detection of workpieces with special materials or large shape differences; there is no need to produce matching tooling for different workpieces to be detected, which greatly reduces the detection cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a radiation detection device according to an embodiment of the present application.

[0018] The reference numerals are:

[0019] 101-base; 102-gear box; 103-claw; 104-part to be detected; 105-first driving part;

[0020] 201 - guide groove; 202 - compensation cover plate; 203 - base; 204 - second driving member; 205 - push frame; 206 - slider. DETAILED DESCRIPTION

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0025] See also Figure 1As shown, according to the first aspect of an embodiment of the present application, a conversion device is provided, which is used to rotate a piece to be detected 104. The conversion device includes a base 101, a gear box 102 is provided on the base 101, and a plurality of claws 103 are provided on the outer wall of the gear box 102; the claws 103 are used to clamp the first end of the piece to be detected 104, and the gear box 102 drives the plurality of claws 103 to rotate simultaneously, so that the plurality of pieces to be detected 104 rotate synchronously.

[0026] The conversion device is installed on the radiation detection system. One end of the workpiece 104 to be detected is clamped by the conversion device, and the other end of the workpiece 104 to be detected is inserted into the focusing device, thereby realizing radiation non-destructive detection of workpieces with special materials or large differences in shapes. There is no need to produce matching tooling for different workpieces 104 to be detected, which greatly reduces the detection cost.

[0027] The conversion device provided in the present application can perform automated radiation detection of the rod-shaped object to be detected 104 based on the medium and low energy radiation detection system, effectively solving the detection compatibility problem of the conventional radiation detection system and the rod-shaped object to be detected 104; it increases the detection range and improves the detection efficiency.

[0028] The base 101 is a square structure, and pulleys are installed at the four corners. The installation of the pulleys facilitates the adjustment of the position of the conversion device and the installation of the detection member 104.

[0029] The base 101 is provided with a hollow portion, and the weight of the base 101 of the present application is reduced by providing the hollow portion, thereby achieving lightweighting of the conversion device.

[0030] The detected part 104 is a rod-shaped fuel rod, one end of which is a weld end and the other end is a free end. The weld end is inserted into the focusing device and the free end is clamped on the claw 103 of the conversion device.

[0031] In another embodiment, the gear box 102 includes a box body and a rack. The box body is arranged on the base 101. A plurality of driven gear shafts and a main gear shaft are arranged in the box body. The main gear shaft and the driven gear shaft rotate relative to the box body. The driven gear shaft and the main gear shaft are respectively connected to the claws 103. The rack is arranged on the base 101 and meshes with the gear teeth of the main gear shaft and the driven gear shaft at the same time. The main gear shaft is used to drive the rack to move so that the plurality of driven gear shafts rotate synchronously with the main gear shaft. The setting of the gear box 102 is used to realize that the plurality of claws 103 rotate at the same angle at the same time, realize the automatic detection of a plurality of parts 104 to be detected at one time, and greatly improve the detection efficiency.

[0032] The box body includes a buckle cover and a vertical plate. The screws pass through the through holes at both ends of the buckle cover to screw the buckle cover onto the base 101. Vertical plates are respectively installed on both sides of the buckle cover by bolts. The vertical plate, the buckle cover and the base 101 together form a chamber for installing the main gear shaft, the driven gear shaft and the rack. The box body not only supports the gear shaft, but also has a sealing function to prevent the dust in the environment from affecting the meshing of the gear shaft and the rack during long-term use.

[0033] Specifically, two vertical plates arranged opposite to each other are provided with circular holes, each of which is provided with a bearing, the outer ring of the bearing matches the inner wall of the circular hole, and the inner ring of the bearing matches the outer circle of the gear shaft. The transmission resistance between the gear shaft and the vertical plate is reduced by the arrangement of the bearing, thereby reducing the wear between the gear shaft and the vertical plate.

[0034] The claw 103 includes a connecting cylindrical section and a claw body, and the claw 103 is connected to the gear shaft through the connecting cylindrical section;

[0035] The claw body is composed of a circular ring and a hollow frustum, the large end of the hollow frustum is integrally formed with the circular ring, and the small end of the hollow frustum is connected to the connecting section cylinder; the claw body is processed with notches at equal intervals along the circumferential direction, and the arrangement of the notches allows the claw body to be slightly deformed to adapt to different sizes of the parts to be detected 104 and expand the clamping range of the claw 103.

[0036] In another embodiment, the conversion device further includes a first driving member 105, which is disposed on the base 101, and an output shaft of the first driving member 105 is connected to a driving gear shaft on the gear box 102. The first driving member 105 is used to provide power to drive the multiple test pieces 104 to rotate synchronously at the same angle to achieve radiation transillumination in a specific direction.

[0037] Conventionally, the weld of the rod-shaped object to be inspected 104 requires projection imaging in at least three directions. The first driving member 105 is remotely controlled to achieve precise control and multi-angle transillumination of the object to be inspected 104 .

[0038] A limit switch is installed on the base 101 . In this embodiment, the limit switch is a position sensor, which controls the posture and position of the detected component 104 .

[0039] The X-ray detection system also includes a remote control system, and the limit switch and the first drive member 105 are respectively connected to the remote control system; the rotation angle and distance information of the object to be detected 104 are sensed by the position sensor, and fed back to the control unit of the X-ray detection system, which identifies and sends instructions to make the first drive member 105 drive the main gear shaft to rotate, and then drive the driven gear shaft to rotate synchronously with the driving gear shaft through the movement of the rack, so that the object to be detected 104 is rotated to a suitable posture, and then X-ray transillumination is performed.

[0040] The first driving member 105 is a linear motor.

[0041] The second aspect of the present application provides a ray detection system, including a focusing device and any of the above-mentioned conversion devices, the focusing device and the conversion device are arranged relative to each other, the part to be detected 104 is arranged between the two, the focusing device includes a guide groove 201, a guide block and a compensation component, the compensation component includes a first side portion and a second side portion, the first side portion and / or the second side portion is connected to one end of the guide block, the other end of the guide block cooperates with the guide groove 201, and the guide groove 201 is used to drive the guide block to move to adjust the height of the compensation component. By setting the guide groove 201, the height of the detection end of the part to be detected 104 is finely adjusted, the focal length is adjusted, and clear imaging conditions can be obtained.

[0042] The absorption coefficient of the compensation component to radiation should be consistent with or similar to the absorption system of the object to be detected 104, and must pass the radiation detection.

[0043] In another embodiment, the guide groove 201 is a wave-shaped guide groove. The wave-shaped guide groove does not have a sliding dead angle, so that the sliding between the guide block and the guide groove 201 is smoother.

[0044] In another embodiment, the compensation assembly includes an end fixing plate and a compensation cover plate 202, and the compensation cover plate 202 and the end fixing plate are both provided with compensation grooves, and the compensation cover plate 202 is buckled on the end fixing plate so that the compensation grooves on the compensation cover plate 202 and the compensation grooves on the end fixing plate are aligned to form a compensation hole, and the second end of the part to be detected 104 is inserted into the corresponding compensation hole, and the end fixing plate is connected to the corresponding guide block. By setting the compensation hole in the compensation assembly, on the one hand, it cooperates with the claws 103 on the conversion device to achieve one-time clamping of multiple parts to be detected 104, and on the other hand, the size of the compensation hole is larger than the part to be detected 104, so as to avoid friction between the part to be detected 104 and the compensation hole when the part to be detected 104 is inserted into the compensation hole, thereby damaging the outer surface of the part to be detected 104.

[0045] The shape of the compensation hole is consistent with the appearance of the to-be-detected component 104 to ensure a stable matching relationship between the two and prevent the to-be-detected component 104 from being damaged during the installation process.

[0046] At the same time, when inserting the test piece 104 into the compensation hole, the girth weld and the sealing weld should be in the specified position, so that all the girth welds of the test piece 104 to be transilluminated are on a straight line segment. During transillumination, the center indicator of the ray generator window should be aligned with the midpoint of the straight line segment.

[0047] In another embodiment, the focusing device further comprises a base 203, a limiting column is arranged on the base 203, a limiting hole is arranged on the end fixing plate, and the limiting column is arranged in the limiting hole, so that the compensation component moves up and down along the limiting column. Through the cooperation between the limiting column and the limiting hole on the end fixing plate, the guide groove 201 only has the degree of freedom of movement in the up and down direction when the guide block is pushed to move and drive the compensation component to move up and down.

[0048] In another embodiment, the focusing device further comprises a pushing part, the guide groove 201 is located at the upper end of the base 203 and is connected to the pushing part, and the pushing part drives the guide groove 201 to move toward or away from the conversion device along the base 203. The pushing part provides driving force for the movement of the guide groove 201.

[0049] In another embodiment, the pushing portion includes a second driving member 204, a transmission assembly and a pushing frame 205, the second driving member 204 is arranged on the base 203, the output end of the second driving member 204 is connected to one end of the transmission assembly, the other end of the transmission assembly is connected to the pushing frame 205, and the guide groove 201 is arranged on the pushing frame 205.

[0050] The push frame 205 includes a U-shaped plate, a square hollow frame, a first connecting plate and a second connecting plate. The openings at both ends of the square hollow frame are connected to the web of the U-shaped plate by bolts. The groove part of the U-shaped plate cooperates with the base 203, so that the flange at one end of the U-shaped plate is located on the upper surface of the base 203, and the flange at the other end of the U-shaped plate is located on the lower surface of the base 203. The flange of the U-shaped plate located on the upper surface of the base 203 and the flange end of the U-shaped plate located on the lower surface of the base 203 are respectively provided with a first connecting plate. The two ends of the first connecting plate located on the upper surface of the base 203 are respectively installed with guide grooves 201 by bolts, and the two ends of the second connecting plate located on the lower surface of the base 203 are respectively installed with second connecting plates by bolts. The sliding connection between the push frame 205 and the base 203 is realized by the arrangement of the U-shaped plate, the first connecting plate and the second connecting plate.

[0051] The second driving member 204 is connected to the remote control system, and the remote control system controls the operation of the second driving member 204 to adjust the weld end of the inspected member 104 to move to a suitable focal length so that clear imaging can be obtained; the second driving member 204 is a linear motor.

[0052] In another embodiment, slide grooves are provided on both side end surfaces of the base 203, and the push frame 205 includes a slider 206, and the slider 206 on the push frame 205 is arranged in the slide groove on the base 203. Through the cooperation between the slider 206 on the push frame 205 and the slide groove on the base 203, the front end of the guide groove 201 is prevented from warping in the process of driving the guide block to move the compensation assembly up and down to adjust the height, and at the same time, the push frame 205 can move on a specified track to ensure the uniqueness of the moving route of the guide groove 201.

[0053] One end of the slider 206 is connected to the guide groove 201 by bolts, and the other end is connected to the second connecting plate by bolts, so as to further avoid the phenomenon that the front end of the wire groove is warped during the movement.

[0054] When using the X-ray detection system:

[0055] Step 1: confirm the effectiveness and safety of the radiation detection system. In this embodiment, the radiation detection system is a DR imaging detection system.

[0056] Step 2: Install the conversion device on the detection platform of the X-ray detection system and connect the control system and the limit switch.

[0057] Step 3, insert the test piece 104 (rod-shaped fuel rod) on the conversion device, insert the weld end into the compensation hole of the compensation component of the focusing device, use the compensation cover plate 202 and the end fixing plate to wrap the weld end of the test piece 104, and clamp the free end on the claw 103 of the conversion device to achieve thickness compensation and radiation transillumination of the test piece 104. The compensation component is used to compensate for the unevenness of the radiation transmission distance of the test piece 104, wrap the circumferential weld of the test piece 104, and reduce the influence of radiation scattering; Figure 1 As described above, the conversion device provided in this embodiment can clamp eight pieces 104 to be detected at the same time.

[0058] Step 4, drive the guide groove 201 through the second driving member 204 to drive the weld end of the component to be inspected 104 to a suitable focal length; install the image quality meter, dark box film and lead type mark on the focusing device; the dark box film realizes the capture and imaging of the radiation signal.

[0059] Among them, lead type markings are used to detect scattered rays. If a lead type mark image with a blackness lower than the surrounding background appears on the film, it means that the back-ray protection is insufficient and the film is unqualified; if no lead type mark image appears on the film or the blackness of the lead type mark image is higher than the surrounding background, it means that the back-ray protection meets the requirements.

[0060] Step 5, close the lead room and perform transillumination remotely; after transillumination once, turn off the X-ray machine; open the lead room, take out the transillumination film of the first angle and replace it with the film required for the second angle, remotely control the first driving member 105 to rotate the part to be inspected 104 to the second angle, close the lead room and perform transillumination at the second angle. The specific transillumination direction and transillumination angle can refer to relevant national standards or inspection procedures. Repeat this process for several rounds to complete the inspection of the first batch of parts to be inspected 104.

[0061] Step 6, removing all the pieces to be tested 104, collecting the pieces to be tested 104 after testing, arranging new films, and performing transillumination of the second batch of pieces to be tested 104;

[0062] Step 7: After all the inspection pieces 104 have been radiographed, disconnect the connecting cables, disassemble the conversion device, and then proceed to perform radiographic inspection of other workpieces.

[0063] This application provides a practical, simple and easy-to-use detection method for non-destructive detection of rod-shaped fuel elements. Under the premise of not affecting the performance of the radiation detection system, by integrating compensation components, focusing equipment, and conversion devices, a system based on radiation detection is completed, and the fuel rod automatic radiation detection function is realized. With the emergence of various new types of rod-shaped fuel elements in new reactor types, the role of the conversion device will become more and more obvious. It has the advantages of simplicity, high efficiency, and high degree of automation, and has broad prospects for engineering application.

[0064] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0065] The above are only 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 principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A conversion device, It is characterized in that The conversion device is used to rotate the to-be-detected member (104), and the conversion device comprises: A base (101), wherein a gear box (102) is disposed on the base (101), and a plurality of claws (103) are disposed on an outer side wall of the gear box (102); The clamping claw (103) is used to clamp the first end of the to-be-detected member (104), and the gear box (102) drives the plurality of clamping claws (103) to rotate simultaneously, so that the plurality of to-be-detected members (104) rotate synchronously.

2. The conversion device according to claim 1, It is characterized in that The gear box (102) comprises a box body and a rack. The box body is arranged on the base (101). A plurality of driven gear shafts and a main gear shaft are arranged in the box body. The main gear shaft and the driven gear shaft rotate relative to the box body. The driven gear shaft and the main gear shaft are respectively connected to the claw (103). The rack is arranged on the base (101) and is meshed with the gear teeth of the main gear shaft and the driven gear shaft at the same time. The main gear shaft is used to drive the rack to move so that the plurality of driven gear shafts rotate synchronously with the main gear shaft.

3. The conversion device according to claim 2, It is characterized in that The conversion device further comprises a first driving member (105), wherein the first driving member (105) is arranged on the base (101), and an output shaft of the first driving member (105) is connected to the driving gear shaft on the gear box (102).

4. A radiation detection system, It is characterized in that It comprises a focusing device and a conversion device as claimed in any one of claims 1 to 3, wherein the focusing device is arranged opposite to the conversion device, the focusing device comprises a guide groove (201), a guide block and a compensation component, the compensation component comprises a first side portion and a second side portion, the first side portion and / or the second side portion is connected to one end of the guide block, the other end of the guide block cooperates with the guide groove (201), and the guide groove (201) is used to drive the guide block to move so as to adjust the height of the compensation component.

5. The radiation detection system according to claim 4, It is characterized in that The guide groove (201) is a wave-shaped guide groove.

6. The radiation detection system according to claim 4, It is characterized in that The compensation component comprises an end fixing plate and a compensation cover plate (202), and the compensation cover plate (202) and the end fixing plate are both provided with compensation grooves, and the compensation cover plate (202) is snapped onto the end fixing plate so that the compensation groove on the compensation cover plate (202) and the compensation groove on the end fixing plate are aligned to form a compensation hole, and the second end of the part to be detected (104) is inserted into the corresponding compensation hole, and the end fixing plate is connected to the corresponding guide block.

7. The radiation detection system according to claim 6, It is characterized in that The focusing device also includes a base (203), a limiting column is arranged on the base (203), a limiting hole is provided on the end fixing plate, and the limiting column is arranged in the limiting hole, so that the compensation component moves up and down along the limiting column.

8. The radiation detection system according to claim 4, It is characterized in that The focusing device also includes a pushing portion, the guide groove (201) is located at the upper end of the base (203) and is connected to the pushing portion, and the pushing portion drives the guide groove (201) to move along the base (203) toward or away from one side of the conversion device.

9. The radiation detection system according to claim 8, It is characterized in that The pushing portion comprises a second driving member (204), a transmission assembly and a pushing frame (205); the second driving member (204) is arranged on the base (203); the output end of the second driving member (204) is connected to one end of the transmission assembly, and the other end of the transmission assembly is connected to the pushing frame (205); and the guide groove (201) is arranged on the pushing frame (205).

10. The radiation detection system according to claim 9, It is characterized in that Slide grooves are provided on both side end surfaces of the base (203); the push frame (205) includes a slider (206); and the slider (206) on the push frame (205) is arranged in the slide grooves on the base (203).

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