Piece distribution device for radiographic inspection of nuclear island containment penetration piece

Abstract

The invention provides a piece distribution device for radiographic inspection of a nuclear island containment penetration piece. The piece distribution device is used for performing radiographic inspection on a welding seam of an outer sleeve. The piece distributing device comprises a supporting mechanism and a bottom piece arranging mechanism. Wherein the supporting mechanism can move in the interlayer. The film arranging mechanism is arranged on the supporting mechanism. The negative film arrangement mechanism is provided with a cassette, and when the supporting mechanism moves to a weld joint of the inner wall of the outer sleeve, the cassette is opposite to the weld joint. The piece distribution device can be used for quickly performing ray detection on the distribution cassette of the outer sleeve of the penetration piece.

Description

Technical Field

[0001] The invention relates to nuclear power welding quality detection, in particular to a piece laying device for ray detection of nuclear island containment penetrations. Background Art

[0002] The penetration is a component that runs through the nuclear island containment, supporting the pipeline and preventing the radioactive source from overflowing from the nuclear island. In the nuclear power plant reactor, there are two layers of inner and outer containment. The component that runs through the containment is the penetration. The penetration is divided into two parts, each of which runs through a layer of containment, and the middle is connected by welding. The welding work is completed at the nuclear power construction site, and a series of non-destructive testing methods are required to ensure the welding quality after completion.

[0003] For pipeline girth welds, general radiographic detection methods include double-wall single shadow, eccentric radiography, center radiography, and single-wall radiography with the source outside.

[0004] However, the double-wall single-shadow, eccentric radiography and center radiography detection methods cannot detect the weld of the outer sleeve of the penetration piece; since the weld is far away from the accessible end of the pipeline, the detection method of single-wall radiography with the source outside cannot place the dark box in the expected position. Summary of the invention

[0005] The object of the present invention is to provide a piece laying device for radiographic detection of nuclear island containment penetrations, which can quickly perform radiographic detection on the arrangement dark box of the outer sleeve of the penetration.

[0006] The present invention provides a film distribution device for radiographic detection of nuclear island containment penetrations, wherein the penetration comprises an outer sleeve and an inner sleeve, wherein an interlayer is formed between the outer sleeve and the inner sleeve; the film distribution device is used for performing radiographic detection on the weld of the outer sleeve; the film distribution device comprises a supporting mechanism and a film placement mechanism; wherein the supporting mechanism is movable within the interlayer; the film placement mechanism is disposed on the supporting mechanism; the film placement mechanism is provided with a dark box, and when the supporting mechanism moves to the weld of the inner wall of the outer sleeve, the dark box and the weld are opposite.

[0007] In one embodiment, the cloth device further comprises an annular positioning mechanism connected to the supporting mechanism; the annular positioning mechanism is fixedly arranged relative to the supporting mechanism to position the supporting mechanism in the circumferential direction of the outer sleeve.

[0008] In one embodiment, the cloth device also includes a feed adjustment mechanism; the feed adjustment mechanism is connected to the circumferential positioning mechanism and the supporting mechanism, and the feed adjustment mechanism is used to adjust the distance between the supporting mechanism and the circumferential positioning mechanism in a first direction; when the supporting mechanism is located in the interlayer, the first direction is parallel to the axial direction of the outer sleeve.

[0009] In one embodiment, the feed adjustment mechanism includes an adjustment rod and a guide sleeve; the guide sleeve is arranged on the annular positioning mechanism along the first direction; one end of the adjustment rod is connected to the support mechanism; the guide sleeve is sleeved outside the adjustment rod, and the adjustment rod can be operably moved relative to the guide sleeve, thereby causing the support mechanism to move in the first direction relative to the annular positioning mechanism.

[0010] In one embodiment, the feed adjustment mechanism further includes a step adjustment member; the step adjustment member is connected to the circumferential positioning mechanism and the guide sleeve; the step adjustment member is used to adjust the position of the guide sleeve relative to the circumferential positioning mechanism.

[0011] In one embodiment, the support mechanism includes a support base plate and a guide assembly; wherein the base film arrangement mechanism is arranged on the support base plate; the guide assembly includes an outer tube guide and an inner tube guide; the outer tube guide and the inner tube guide are both connected to the support base plate; when the support mechanism is located in the interlayer, the outer tube guide is pressed against the inner wall of the outer sleeve, and the inner tube guide is pressed against the outer wall of the inner sleeve.

[0012] In one embodiment, the outer tube guide member includes an outer tube guide wheel and an outer tube guide wheel support frame; the outer tube guide wheel support frame is connected to the supporting base plate; and the outer tube guide wheel is arranged on the outer tube guide wheel support frame.

[0013] In one embodiment, there are multiple outer tube guide wheels, and the multiple outer tube guide wheels are arranged in parallel in a direction surrounding the first direction; and / or the outer tube guide wheel support frame includes an outer tube guide wheel support base and an outer tube guide wheel adjustment shaft; the outer tube guide wheel adjustment shaft can move relative to the outer tube guide wheel support base to adjust the distance between the outer tube guide wheel and the support base plate; and / or there are multiple outer tube guide wheels; the outer tube guide wheel support frame includes an outer tube guide wheel support base and an outer tube guide wheel fixing seat; the outer tube guide wheel fixing seat is arranged on the outer tube guide wheel support base; the outer tube guide wheel is rotatably arranged on the outer tube guide wheel fixing seat; the outer tube guide wheel fixing seat includes an elastic support plate, and the elastic support plate connects two adjacent outer tube guide wheels.

[0014] In one embodiment, the inner tube guide member includes an inner tube guide wheel and an inner tube guide wheel support frame; the inner tube guide wheel support frame is connected to the supporting base plate; and the inner tube guide wheel is arranged on the inner tube guide wheel support frame.

[0015] In one embodiment, the film arrangement mechanism includes a lifting top plate and a lifting assembly; the lifting assembly is arranged on the supporting mechanism, and the lifting top plate is arranged on the lifting assembly; the dark box is arranged on the lifting top plate, and the lifting assembly can drive the lifting top plate to move in a direction perpendicular to the first direction, thereby making the dark box press against the weld on the inner wall of the outer sleeve.

[0016] In one embodiment, the lifting assembly includes a driving structure and a lifting support frame; the lifting support frame is arranged on the supporting mechanism; the lifting support frame includes a first lifting frame and a second lifting frame; one end of the first lifting frame is slidably connected to the supporting mechanism, and the other end of the first lifting frame is slidably connected to the lifting top plate; one end of the second lifting frame is rotatably connected to the supporting mechanism, and the other end of the second lifting frame is rotatably connected to the lifting top plate; the driving structure can drive the two ends of the first lifting frame to slide relative to the supporting mechanism and the lifting top plate respectively, thereby causing the lifting top plate to rise and fall.

[0017] In one embodiment, the driving structure includes a driving member, a driving wheel, a driven wheel and a transmission rod; the output end of the driving member is connected to the driving wheel, the driven wheel is in transmission connection with the driving wheel, the driving member can drive the driving wheel to rotate, and then drive the driven wheel to rotate; the transmission rod is arranged on the driven wheel and contacts with a cross bar arranged on the first lifting frame; the rotation of the driven wheel causes the transmission rod to rise and fall, and then drives the cross bar, the first lifting frame and the second lifting frame to rise and fall.

[0018] In one embodiment, the film arrangement mechanism also includes a clamping structure; wherein the clamping structure includes an elastic clamping member and a film arrangement plate; the dark box is arranged on the film arrangement plate; the elastic clamping member connects the film arrangement plate and the lifting top plate, and the elastic clamping member provides an elastic force for the film arrangement plate to press against the inner wall of the outer sleeve.

[0019] In one embodiment, the upper surface of the bottom film arrangement plate is an arc surface that is compatible with the inner wall of the outer sleeve; and / or the clamping structure also includes an arrangement plate adjustment bracket arranged on the lifting top plate; at least part of the arrangement plate adjustment bracket extends out of the lifting top plate, and at least part of the bottom film arrangement plate is arranged on the arrangement plate adjustment bracket extending out of the lifting top plate.

[0020] The supporting mechanism of the film arrangement device for the radiographic detection of nuclear island containment penetrations of the present invention can enter the interlayer from the approach end and move within the interlayer to drive the film arrangement mechanism to move to the weld of the outer sleeve. The dark box can be placed in a small space at a position that cannot be reached by inspectors, and the detection process is fast, simple and flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0022] Figure 1 It is a schematic diagram of the structure of the penetration;

[0023] Figure 2 It is a schematic diagram of the process of an embodiment of a patch device for radiographic detection of nuclear island containment penetrations according to the present invention;

[0024] Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure of the cloth device shown. DETAILED DESCRIPTION

[0025] Figure 1 The structure of the penetration member 2 is shown. Figure 1 As shown, the penetration 2 is a component that penetrates the nuclear island containment 1, and plays the role of supporting the pipeline and preventing the radioactive source material from overflowing from the nuclear island. In the nuclear power plant reactor type, there are two layers of inner and outer containment 1. The component that penetrates the containment 1 is the penetration 2. The penetration 2 is divided into two parts, each of which penetrates a layer of containment 1, and the middle is connected by a welding process. The penetration 2 includes an outer sleeve 21 and an inner sleeve 22, and an interlayer 23 is formed between the outer sleeve 21 and the inner sleeve 22. The welding work is completed at the nuclear power construction site, and after completion, a series of non-destructive testing methods need to be used to ensure the welding quality.

[0026] According to Figure 1 The design requirements shown are that the wall thickness of the outer sleeve 21 of the penetration 2 is 65 mm, the wall thickness of the inner sleeve 22 is 40 mm, the weld grade is RCC-M 1, and 100% radiographic testing is required. For pipeline girth welds, general radiographic testing methods include double-wall single shadow, eccentric radiography, center radiography, and single-wall radiography with the source outside.

[0027] If double-wall single-image radiography is used, the thickness that needs to be penetrated is 220mm. This is far beyond the maximum radioactivity thickness of the commonly used γ source (Ir192) on site (high sensitivity radioactivity range is 20-90mm). A radioactive source with stronger radioactivity is required for detection, but there is no such source on site, and the use of double-wall single-image radiography will result in a long detection time. Therefore, the double-wall single-image radiography method cannot detect the weld 21a of the outer sleeve 21 of the penetration piece 2. If eccentric radiography is used, the geometric blur is 0.79mm, which far exceeds the standard requirement of 0.3mm. Therefore, the eccentric radiography method cannot detect the weld 21a of the outer sleeve 21 of the penetration piece 2. If central radiography is used, the thickness is 110mm, and detection is also impossible.

[0028] In summary, under the conditions on site, the sealing weld of penetration 2 can only be inspected by single-wall external penetration. However, the weld 21a is about 2m away from the accessible end of the pipeline, and the inspectors cannot approach the inner wall. In addition, the distance between the inner and outer pipes is about 230mm, and the space is small, making it impossible to effectively place the dark box in the expected position.

[0029] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided to explain the present invention, not to limit the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature illustrated or described as part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover these modifications and variations within the scope of the appended claims and their equivalents.

[0030] As used herein, the term "axial direction" refers to the central axis of the outer sleeve 21 and / or the inner sleeve 22 or a direction parallel to the central axis of the outer sleeve 21 and / or the inner sleeve 22, the term "radial direction" refers to a direction perpendicular to the "axial direction", and the term "circumferential direction" refers to a direction around the "axial direction". The terms "first" and "second" may be used interchangeably to distinguish one component from another, and are not intended to indicate the position or importance of each component.

[0031] Figure 2 and Figure 3 An embodiment of the patch device for radiographic detection of nuclear island containment penetrations of the present invention is shown. The patch device of the present invention is suitable for a single-wall external penetration radiographic detection method, and is used to perform radiographic detection on the weld 21a of the outer sleeve 21. The single-wall external penetration is used to detect internal defects of the weld 21a of the outer sleeve 21 of the penetration 2. The principle is to use radiation to penetrate the outer sleeve 21. Due to the different degrees of absorption of radiation by different tissue structures inside the weld (such as defective parts and intact parts), the radiation forms images of different blackness on the film or detector after passing through the outer sleeve 21, thereby detecting the welding quality. The single-wall external penetration radiographic detection method requires a radiation source, a negative film, and a dark box. Among them, the negative film is placed in the dark box. The dark box is arranged in the interlayer 23, and the radiation source is arranged outside the penetration 2.

[0032] Combination Figure 2 and Figure 3 The film arrangement device for the radiation detection of the penetration piece 2 of the nuclear island containment 1 of the present invention comprises a support mechanism 100 and a film arrangement mechanism 200. The support mechanism 100 can move in the interlayer 23. The film arrangement mechanism 200 is arranged on the support mechanism 100. The film arrangement mechanism 200 is provided with a dark box (not shown), and when the support mechanism 100 moves to the weld of the inner wall of the outer sleeve 21, the dark box and the weld are opposite.

[0033] The supporting mechanism 100 of the film arrangement device for X-ray detection of nuclear island containment penetrations of the present invention can enter the interlayer 23 from the approach end, and move in the interlayer 23 to drive the film arrangement mechanism 200 to move to the weld of the outer sleeve 21. The dark box can be placed in a small space to a position that the inspectors cannot reach, and the detection process is fast, simple and flexible.

[0034] In one embodiment, the film arrangement device also includes a circumferential positioning mechanism 300 connected to the support mechanism 100. The circumferential positioning mechanism 300 is fixedly arranged relative to the support mechanism 100 to position the support mechanism 100 in the circumferential direction of the outer sleeve 21. The circumferential positioning mechanism 300 is a magnetic surround positioning trolley. The magnetic surround positioning trolley is magnetic, so it can be adsorbed on the outer wall of the inner sleeve 22 or the inner wall of the outer sleeve 21, and plays the role of fixing the support mechanism 100 and the film arrangement mechanism 200 at a certain angle, which is convenient for adjusting the positioning during the detection process. The magnetic surround positioning trolley can be remotely controlled to move in the circumferential direction. The pipeline circumferential weld can be divided into multiple sections (for example, 32 sections) in the circumferential direction, and each section needs to be subjected to radiographic detection, that is, the magnetic surround positioning trolley is controlled to be fixed in the expected position in each radiographic detection.

[0035] In one embodiment, the cloth device further includes a feeding adjustment mechanism 400. The feeding adjustment mechanism 400 is connected to the annular positioning mechanism 300 and the support mechanism 100, and the feeding adjustment mechanism 400 is used to adjust the distance between the support mechanism 100 and the annular positioning mechanism 300 in the first direction AA. When the support mechanism 100 is located in the interlayer 23, the first direction AA is parallel to the axial direction of the outer sleeve 21. In other words, the support mechanism 100 can move in the axial direction of the outer sleeve 21. When the position of the magnetic force surrounding the positioning trolley is fixed, the support mechanism 100 and the bottom film arrangement mechanism 200 can be fed into the weld in the interlayer 23 by adjusting the feeding adjustment mechanism 400.

[0036] Further, the feeding adjustment mechanism 400 includes an adjustment rod 410 and a guide sleeve 420. The guide sleeve 420 is arranged on the annular positioning mechanism 300 along the first direction AA. One end of the adjustment rod 410 is connected to the support mechanism 100. The guide sleeve 420 is sleeved outside the adjustment rod 410, and the adjustment rod 410 can be operably moved relative to the guide sleeve 420, thereby allowing the support mechanism 100 to move relative to the annular positioning mechanism 300 in the first direction AA. The combination of the guide sleeve 420 and the adjustment rod 410 can achieve long-distance adjustment of the support mechanism 100 and the negative film arrangement mechanism 200. If the initial position of the negative film arrangement mechanism 200 is far away from the weld, a long-distance adjustment method can be used first to roughly locate it to improve the efficiency of the adjustment.

[0037] The feeding adjustment mechanism 400 further includes a step adjustment member 430. The step adjustment member 430 is connected to the annular positioning mechanism 300 and the guide sleeve 420. The step adjustment member 430 is used to adjust the position of the guide sleeve 420 relative to the annular positioning mechanism 300. The step adjustment member 430 can be a worm gear transmission structure, including a longitudinal step adjustment screw 431 and a longitudinal step adjustment knob 432, such as Figure 2 As shown. The step adjustment member 430 can achieve fine adjustment and precise positioning of the support mechanism 100 and the film arrangement mechanism 200. After roughly positioning by long-distance adjustment, the step adjustment member 430 is used for fine adjustment, so that the dark box can accurately reach the weld, improving the accuracy of axial positioning.

[0038] In one embodiment, the support mechanism 100 includes a support base plate 110 and a guide assembly 120. The support base plate 110 is provided with a bottom film arrangement mechanism 200. The guide assembly 120 includes an outer tube guide 121 and an inner tube guide 122. The outer tube guide 121 and the inner tube guide 122 are both connected to the support base plate 110. When the support mechanism 100 is located in the interlayer 23, the outer tube guide 121 is pressed against the inner wall of the outer sleeve 21, and the inner tube guide 122 is pressed against the outer wall of the inner sleeve 22.

[0039] Further, the outer tube guide member 121 includes an outer tube guide wheel 1211 and an outer tube guide wheel support frame 1212. The outer tube guide wheel support frame 1212 is connected to the support base plate 110. The outer tube guide wheel 1211 is arranged on the outer tube guide wheel support frame 1212. The inner tube guide member 122 includes an inner tube guide wheel 1221 and an inner tube guide wheel support frame 1222. The inner tube guide wheel support frame 1222 is connected to the support base plate 110, which can be bolted. The inner tube guide wheel 1221 is arranged on the inner tube guide wheel support frame 1222. The cloth piece device can be conveyed to a designated area by the inner tube guide wheel 1221 and the outer tube guide wheel 1211.

[0040] The outer tube guide wheel 1211 may be multiple. Figure 2 As shown, there are two outer tube guide wheels 1211. Multiple outer tube guide wheels 1211 are arranged in parallel in the direction surrounding the first direction AA, that is, multiple outer tube guide wheels 1211 are arranged in parallel and spaced along the circumference of the outer sleeve 21. Correspondingly, multiple inner tube guide wheels 1221 can also be selected. When the cloth sheet device of the present invention is located in the interlayer 23, the outer tube guide wheel 1211 abuts against the inner wall of the outer sleeve 21, and the inner tube guide wheel 1221 abuts against the outer wall of the inner sleeve 22. Multiple outer tube guide wheels 1211 and inner tube guide wheels 1221 can improve the stability of the cloth sheet device in the interlayer 23.

[0041] The outer tube guide wheel support frame 1212 includes an outer tube guide wheel support base 1212a and an outer tube guide wheel adjustment shaft 1212b. The outer tube guide wheel adjustment shaft 1212b can move relative to the outer tube guide wheel support base 1212a to adjust the distance between the outer tube guide wheel 1211 and the support base 110. Specifically, an outer tube guide wheel adjustment sleeve is provided on the outer tube guide wheel support base 1212a, and the outer tube guide wheel adjustment shaft 1212b can pass through the outer tube guide wheel adjustment sleeve to adjust the distance between the outer tube guide wheel 1211 and the outer wall of the outer sleeve 21 or the degree of compression of the outer tube guide wheel 1211 on the outer wall of the outer sleeve 21.

[0042] The outer tube guide wheel 1211 can be locked and limited by the fixed knobs 1211a on both sides. The outer tube guide wheel 1211 is locked and limited after being adjusted to a suitable height by the outer tube guide wheel adjustment shaft 1212b, thereby ensuring the stable connection of the cloth device of the present invention.

[0043] In one embodiment, the outer tube guide wheel support frame 1212 includes an outer tube guide wheel support base 1212a and an outer tube guide wheel fixing seat 1212c. The outer tube guide wheel fixing seat 1212c is arranged on the outer tube guide wheel support base 1212a. The outer tube guide wheel 1211 is rotatably arranged on the outer tube guide wheel fixing seat 1212c. The outer tube guide wheel fixing seat 1212c includes an elastic support plate 1212d, and the elastic support plate 1212d connects two adjacent outer tube guide wheels 1211. The elastic support plate 1212d can make the outer tube guide wheel 1211 more closely fit the shape of the inner wall of the outer sleeve 21. The elastic support plate 1212d can be optionally a spring pressing plate.

[0044] In one embodiment, the negative film arrangement mechanism 200 includes a lifting top plate 210 and a lifting assembly 220. The lifting assembly 220 is disposed on the support mechanism 100, and the lifting top plate 210 is disposed on the lifting assembly 220. A dark box is disposed on the lifting top plate 210, and the lifting assembly 220 can drive the lifting top plate 210 to move in a direction perpendicular to the first direction AA, thereby causing the dark box to press against the weld on the inner wall of the outer sleeve 21. In this embodiment, the lifting assembly 220 can move in the radial direction of the outer sleeve 21. Moving in a direction close to the inner wall of the outer sleeve 21 is called as raising, and moving in a direction close to the outer wall of the inner sleeve 22 is called as lowering.

[0045] The lifting assembly 220 cooperates with the feeding adjustment mechanism 400 to perform two-dimensional precise positioning, which can ensure the accurate placement of the radiation detection sheet and avoid detection errors caused by position deviation. Through the precise control system and positioning mechanism, the device can work stably in a complex construction environment and adapt to containment penetrations of different specifications and sizes.

[0046] The lifting assembly 220 of the present invention is a remote control lifting device. The height of the cloth plate can be adjusted remotely by remote control, and radial positioning can be performed, so that the cloth process can be completed quickly and the detection cycle can be shortened. At the same time, through remote control adjustment, the process greatly reduces the manual adjustment, reduces the work intensity, and increases the accuracy of the cloth.

[0047] Furthermore, the lifting assembly 220 includes a driving structure 221 and a lifting support frame 222. The lifting support frame 222 is disposed on the supporting mechanism 100. Figure 2 As shown, there are two lifting support frames 222, which are symmetrically arranged on the support base plate 110 to ensure the stability of lifting. The lifting support frames 222 include a first lifting frame 2221 and a second lifting frame 2222. Figure 2 As shown, the first lifting frame 2221 and the second lifting frame 2222 are arranged in a scissor-type structure. One end of the first lifting frame 2221 is slidably connected to the support mechanism 100 , and the other end of the first lifting frame 2221 is slidably connected to the lifting top plate 210 .

[0048] like Figure 2 As shown, the lifting side plate 130 is fixedly arranged on the supporting bottom plate 110 of the supporting mechanism 100. One end of the first lifting frame 2221 can slide in the first limiting hole 131 opened on the lifting side plate 130, and the other end of the first lifting frame 2221 can slide in the second limiting hole 211 opened on the lifting top plate 210. When the two ends of the first lifting frame 2221 are respectively located on the outside of the first limiting hole 131 and the second limiting hole 211 (i.e., the end close to the edge), the height of the lifting support frame 222 is the smallest; when the two ends of the first lifting frame 2221 are respectively located on the inside of the first limiting hole 131 and the second limiting hole 211 (i.e., the end away from the edge), the height of the lifting support frame 222 is the largest. The length of the first limiting hole 131 is consistent with the length of the second limiting hole 211, and the lengths of the two need to be determined according to the distance that the lifting top plate 210 needs to be raised.

[0049] One end of the second lifting frame 2222 is rotatably connected to the support mechanism 100, and the other end of the second lifting frame 2222 is rotatably connected to the lifting top plate 210. The driving structure 221 can drive the two ends of the first lifting frame 2221 to slide relative to the support mechanism 100 and the lifting top plate 210, thereby lifting and lowering the lifting top plate 210.

[0050] In one embodiment, the driving structure 221 includes a driving member 2211, a driving wheel 2212, a driven wheel 2213 and a transmission rod 2214. The driving member 2211 may be a driving motor. The output end of the driving member 2211 is connected to the driving wheel 2212, and the driven wheel 2213 is in transmission connection with the driving wheel 2212. The driving member 2211 can drive the driving wheel 2212 to rotate, thereby driving the driven wheel 2213 to rotate. There may be two driven wheels 2213, and the two driven wheels 2213 are in transmission connection with the driving wheel 2212 by belt transmission. The transmission rod 2214 is arranged on the driven wheel 2213 and contacts with the cross bar 2223 arranged on the first lifting frame 2221. The rotation of the driven wheel 2213 causes the transmission rod 2214 to rise and fall, thereby driving the cross bar 2223, the first lifting frame 2221 and the second lifting frame 2222 to rise and fall.

[0051] In one embodiment, the negative film arrangement mechanism 200 further includes a clamping structure 230. The clamping structure 230 includes an elastic clamping member 231 and a negative film arrangement plate 232. A dark box is arranged on the negative film arrangement plate 232. The elastic clamping member 231 connects the negative film arrangement plate 232 and the lifting top plate 210, and the elastic clamping member 231 provides an elastic force for the negative film arrangement plate 232 to press against the inner wall of the outer sleeve 21. The elastic clamping member 231 can be a spring. The number of springs can be selected to be multiple, such as two or four, to provide better support performance.

[0052] The elastic force generated by the elastic pressing member 231 can prevent the film arrangement plate 232 from shaking randomly, thereby ensuring the stability of the dark box and the film position therein. This can ensure that when performing operations such as radiographic detection that require accurate positioning of the film, the film is always in the correct position, thereby improving the accuracy of the detection.

[0053] At the same time, the elastic pressing member 231 can provide a certain degree of elastic deformation, so that the bottom plate arrangement plate 232 can better fit the inner wall of the outer tube. When the inner diameter of the outer tube has a certain range of variation, the elastic pressing member 231 can adaptively adjust the elastic force so that the bottom plate arrangement plate 232 can still be tightly pressed against the inner wall of the outer sleeve 21, thereby increasing the versatility and applicability of the cloth device of the present invention.

[0054] The upper surface of the film arrangement plate 232 is an arc surface that matches the inner wall of the outer sleeve 21 so that the dark box can better fit the inner wall of the outer sleeve 21.

[0055] The clamping structure 230 further includes a layout plate adjustment bracket 233 disposed on the lifting top plate 210. At least part of the layout plate adjustment bracket 233 extends out of the lifting top plate 210, and at least part of the bottom film layout plate 232 is disposed on the layout plate adjustment bracket 233 extending out of the lifting top plate 210. Since the penetration member 2 is arranged at a certain slope, the layout plate adjustment bracket 233 can be arranged to adapt to the slope, so that the bottom film layout plate 232 can match the slope of the penetration member 2, thereby improving the fit between the dark box and the inner wall of the outer sleeve 21.

[0056] The dark box is placed on the film arrangement plate 232 . After reaching the designated position through the aforementioned process, the lifting top plate 210 is raised by remote control to press the elastic pressing member 231 , so that the dark box fits the inner wall of the outer sleeve 21 .

[0057] In combination with the above embodiments, the operation steps of the cloth device of the present invention are as follows:

[0058] In step S100, the cloth piece device is adsorbed on the interlayer 23 of the penetration piece 2 by using an automatic magnetic surrounding trolley, and is aligned with the part to be inspected, and is circumferentially positioned by the automatic magnetic surrounding trolley.

[0059] In step S200, the dark box system is placed on the film arrangement plate 232 and fixed.

[0060] In step S300 , the outer tube guide wheel adjustment shaft 1212 b is adjusted so that the outer tube guide wheel 1211 and the inner tube guide wheel 1221 fit the inner wall of the outer sleeve 21 and the outer wall of the inner sleeve 22 just right.

[0061] In step S400, the dark box system is sent to the approximate position of the weld through the feeding adjustment mechanism 400, the longitudinal step adjustment knob 432 is adjusted, and the positioning is accurately adjusted through the longitudinal step adjustment screw 431, the center of the dark box is aligned with the center of the weld, and it is positioned and locked.

[0062] In step S500, the driving member 2211 is activated by a remote controller to raise the lifting top plate 210 until the elastic pressing member 231 is pressed. At this time, the dark box is attached to the inner wall of the outer sleeve 21.

[0063] In step S600, a radiation source is arranged outside the penetration member 2, and the focus is adjusted to complete the detection.

[0064] In step S700, the film is recovered and re-arranged in the reverse direction, and the device is adjusted to the next inspection area by the automatic magnetic surround trolley, and the above operation is repeated until the whole tube inspection is completed.

[0065] The film distribution device of the present invention simplifies the arrangement of the single-wall external penetration process film for nuclear island containment penetration detection, and there is no need to set up a radiation source inside or perform complex internal arrangement. At the same time, the radiation only needs to penetrate the outer sleeve 21, which reduces the penetration thickness, and the energy distribution of the radiation penetrating the object is uniform, reducing the influence of scattering and attenuation on the image quality.

[0066] The present invention realizes three-dimensional positioning of the bottom plate in the interlayer of the nuclear island containment penetration piece in the axial, radial and circumferential directions, can quickly arrange the bottom plate at the weld, and remotely adjust the arrangement of the bottom plate through remote control.

[0067] The present invention does not rely on a specific internal structure or layout and has greater flexibility. At the same time, the radiation source is located outside the object to be detected, and the staff can easily adjust the position of the radiation source, thereby reducing the direct radiation risk to the staff.

[0068] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A patch device for radiographic detection of a nuclear island containment penetration, the penetration comprising an outer sleeve and an inner sleeve, with an interlayer formed between the outer sleeve and the inner sleeve; It is characterized in that The cloth device is used to perform radiographic inspection on the weld of the outer sleeve; The cloth sheet device comprises a supporting mechanism and a bottom sheet arrangement mechanism; wherein, The support mechanism is movable within the interlayer; The film arrangement mechanism is arranged on the support mechanism; The film arrangement mechanism is provided with a dark box, and when the support mechanism moves to the welding seam of the inner wall of the outer sleeve, the dark box and the welding seam are opposite to each other.

2. The cloth device according to claim 1, characterized in that: The cloth sheet device also includes a circumferential positioning mechanism connected to the supporting mechanism; The circumferential positioning mechanism is fixedly arranged relative to the supporting mechanism to position the supporting mechanism in the circumferential direction of the outer sleeve.

3. The cloth device according to claim 2, characterized in that: The cloth piece device also includes a feeding adjustment mechanism; The feeding adjustment mechanism is connected to the circumferential positioning mechanism and the supporting mechanism, and the feeding adjustment mechanism is used to adjust the distance between the supporting mechanism and the circumferential positioning mechanism in the first direction; When the supporting mechanism is located in the interlayer, the first direction is parallel to the axial direction of the outer sleeve.

4. The cloth device according to claim 3, characterized in that: The feeding adjustment mechanism includes an adjustment rod and a guide sleeve; The guide sleeve is arranged on the annular positioning mechanism along the first direction; One end of the adjusting rod is connected to the supporting mechanism; The guide sleeve is sleeved outside the adjusting rod, and the adjusting rod can be operably moved relative to the guide sleeve, thereby causing the supporting mechanism to move relative to the annular positioning mechanism in the first direction.

5. The cloth device according to claim 4, characterized in that: The feeding adjustment mechanism also includes a step adjustment member; The step adjustment member is connected to the annular positioning mechanism and the guide sleeve; The step adjustment member is used to adjust the position of the guide sleeve relative to the annular positioning mechanism.

6. The cloth device according to claim 3, characterized in that: The support mechanism includes a support base plate and a guide assembly; wherein, The bottom plate is provided with the bottom film arrangement mechanism; The guide assembly includes an outer tube guide and an inner tube guide; The outer tube guide and the inner tube guide are both connected to the supporting base plate; When the supporting mechanism is located in the interlayer, the outer tube guide is pressed against the inner wall of the outer sleeve, and the inner tube guide is pressed against the outer wall of the inner sleeve.

7. The cloth device according to claim 6, characterized in that: The outer tube guide member comprises an outer tube guide wheel and an outer tube guide wheel support frame; The outer tube guide wheel support frame is connected to the support bottom plate; The outer tube guide wheel is arranged on the outer tube guide wheel support frame.

8. The cloth device according to claim 7, characterized in that: There are multiple outer tube guide wheels, and the multiple outer tube guide wheels are arranged in parallel in a direction surrounding the first direction; and / or The outer tube guide wheel support frame includes an outer tube guide wheel support base and an outer tube guide wheel adjustment shaft; The outer tube guide wheel adjustment shaft can move relative to the outer tube guide wheel support base to adjust the distance between the outer tube guide wheel and the support base plate; and / or There are multiple outer tube guide wheels; The outer tube guide wheel support frame includes an outer tube guide wheel support base and an outer tube guide wheel fixing seat; The outer tube guide wheel fixing seat is arranged on the outer tube guide wheel supporting base; The outer tube guide wheel is rotatably arranged on the outer tube guide wheel fixing seat; The outer tube guide wheel fixing seat comprises an elastic support plate, and the elastic support plate connects two adjacent outer tube guide wheels.

9. The cloth device according to claim 6, characterized in that: The inner tube guide member comprises an inner tube guide wheel and an inner tube guide wheel support frame; The inner tube guide wheel support frame is connected to the support bottom plate; The inner tube guide wheel is arranged on the inner tube guide wheel support frame.

10. The cloth device according to any one of claims 3 to 9, characterized in that: The film arrangement mechanism includes a lifting top plate and a lifting assembly; The lifting assembly is arranged on the supporting mechanism, and the lifting top plate is arranged on the lifting assembly; The dark box is arranged on the lifting top plate, and the lifting assembly can drive the lifting top plate to move in a direction perpendicular to the first direction, so that the dark box is pressed against the weld on the inner wall of the outer sleeve.

11. The cloth device according to claim 10, characterized in that: The lifting assembly includes a driving structure and a lifting support frame; The lifting support frame is arranged on the supporting mechanism; The lifting support frame includes a first lifting frame and a second lifting frame; One end of the first lifting frame is slidably connected to the supporting mechanism, and the other end of the first lifting frame is slidably connected to the lifting top plate; One end of the second lifting frame is rotatably connected to the supporting mechanism, and the other end of the second lifting frame is rotatably connected to the lifting top plate; The driving structure can drive the two ends of the first lifting frame to slide relative to the supporting mechanism and the lifting top plate respectively, thereby causing the lifting top plate to rise and fall.

12. The cloth device according to claim 11, characterized in that: The driving structure includes a driving member, a driving wheel, a driven wheel and a transmission rod; The output end of the driving member is connected to the driving wheel, and the driven wheel is in transmission connection with the driving wheel. The driving member can drive the driving wheel to rotate, thereby driving the driven wheel to rotate; The transmission rod is arranged on the driven wheel and contacts with a crossbar arranged on the first lifting frame; The driven wheel rotates to make the transmission rod rise and fall, thereby driving the cross bar, the first lifting frame and the second lifting frame to rise and fall.

13. The cloth device according to claim 10, characterized in that: The bottom film arrangement mechanism also includes a pressing structure; wherein, The pressing structure includes an elastic pressing member and a bottom film arrangement plate; The dark box is arranged on the negative film arrangement plate; The elastic pressing member connects the bottom film arrangement plate and the lifting top plate, and the elastic pressing member provides elastic force for the bottom film arrangement plate to press against the inner wall of the outer sleeve.

14. The cloth device according to claim 13, characterized in that: The upper surface of the bottom film arrangement plate is an arc surface adapted to the inner wall of the outer sleeve; and / or The clamping structure further includes a layout plate adjustment bracket disposed on the lifting top plate; At least part of the arrangement plate adjusting bracket extends out of the lifting top plate, and at least part of the bottom film arrangement plate is arranged on the arrangement plate adjusting bracket extending out of the lifting top plate.

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