Piping inspection device, piping inspection method, and installation method of piping inspection device

Abstract

To provide an inspection device which has a simple structure and is light-weight.SOLUTION: There is provided a pipe inspection device 100 which irradiates a pipe P with X rays from its outer peripheral side to perform inspection, and the pipe inspection device comprises: a frame 10 in which the pipe P is arranged; an X-ray generator 30 which is arranged at one end part of the frame 10; an X-ray reception device 20 which is arranged at the other end part of the frame 10, and faces the X-ray generator 30; and a plurality of rollers 40 which are arranged at an intermediate part of the frame 10, and rotate in contact with the pipe P along an outer peripheral surface of the pipe P.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a piping inspection device, a piping inspection method, and a method for installing the piping inspection device. [Background technology]

[0002] Radiation transmission testing is sometimes used to inspect pipes. For example, in order to measure the thickness of a pipe, a structure has been disclosed in which a measuring unit that irradiates radiation and measures the amount of transmission moves around a base unit attached to the pipe by a driving unit controlled by a control unit (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6518521 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned structure, a base part for moving the measuring part needs to be attached to the piping separately. Therefore, it is time-consuming to attach and detach the base part. In addition, since a drive part is used to move the measuring part, the structure of the device is complicated and the weight is large.

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide an inspection device that is simply structured and lightweight. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention proposes the following means. The piping inspection device of the present invention is a piping inspection device that performs inspection by irradiating X-rays from the outer periphery of a piping, and comprises a frame in which the piping is arranged, an X-ray receiving device arranged at one end of the frame, an X-ray generator arranged at the other end of the frame and facing the X-ray receiving device, and a plurality of rollers arranged in the middle of the frame and in contact with the piping and rotate along the outer periphery of the piping, the plurality of rollers including a pair of first rollers provided on the one end side of the piping and a pair of second rollers provided on the other end side of the piping, the first rollers being rotatably supported by a first arm and the second rollers being rotatably supported by a second arm, and the axial distance between the first rollers and the second rollers being adjusted by the first arm and the second arm. A piping inspection device according to the present invention is a piping inspection device that performs an inspection by irradiating an outer periphery of a piping with X-rays, and includes a frame in which the piping is disposed, an X-ray receiving device disposed at one end of the frame, an X-ray generator disposed at the other end of the frame and facing the X-ray receiving device, and a plurality of rollers disposed in an intermediate portion of the frame and in contact with the piping and rotating along the outer periphery of the piping, the frame having a U-shape constituted by a top plate and a support pillar, the support pillar being disposed so as to sandwich the piping from both sides in a direction perpendicular to the axis of the piping, and the support pillar being connected at one end of the frame to the top plate and attached at the other end to a mounting portion of the X-ray generator. 。

[0007] According to this invention, a plurality of rollers in contact with the pipe rotate along the outer circumferential surface of the pipe. As a result, the X-ray generator and the X-ray receiver move in the circumferential direction of the pipe as the rollers rotate. This makes it possible to move the pipe inspection device around the pipe without the need to attach a separate base part or the like to the pipe. In addition, the movement can be performed manually without using a drive unit. By simplifying the structure in this way, the weight of the piping inspection device can be reduced. Therefore, for example, when the piping inspection device is used to inspect the welded parts of piping at a construction site, the installation of the piping inspection device and the inspection work can be easily performed.

[0008] The frame may further include a fixing magnet disposed in a middle portion thereof and detachably attached to the pipe.

[0009] According to this invention, the piping and the frame are fixed by a fixing magnet, which allows the piping to be irradiated with X-rays in a stable state, thereby enabling safer and more accurate inspection.

[0010] The frame may also be provided with a counterweight.

[0011] According to this invention, a counterweight is provided on the frame. This makes it possible to eliminate the weight difference between, for example, the X-ray generator and the X-ray receiving device. This makes it possible to move the center of gravity of the piping inspection device closer to the center of the piping. This prevents the weight from being biased when the piping inspection device is moved in the circumferential direction of the piping, which contributes to safer inspection work.

[0012] Additionally, the roller and the X-ray generator may be removable from the frame.

[0013] According to this invention, the roller and the X-ray generator are detachable from the frame, so that the pipe inspection device can be attached to the pipe without moving the position of the pipe.

[0014] In addition, the diameter of the roller and the length of the frame may be adjusted according to the diameter of the pipe.

[0015] According to this invention, the diameter of the rollers and the length of the frame are adjusted according to the diameter of the pipe, which makes it possible to more widely accommodate pipes having various diameters.

[0016] Moreover, each component may be provided within a range of 300 mm from the outer circumferential surface of the pipe.

[0017] According to this invention, each component is provided within a range of 300 mm from the outer circumferential surface of the pipe. In other words, no component is provided within a range of more than 300 mm from the outer circumferential surface of the pipe. As a result, at the site where the pipe inspection device is used, as long as an area of ​​at least 300 mm or more is secured from the outer circumferential surface of the pipe, inspection can be performed without interfering with objects located in the vicinity. The piping may be installed underground and excavated around it, and the inspection may be an inspection of a circumferential weld of the piping.

[0018] In addition, a piping inspection method according to the present invention is a piping inspection method using the piping inspection device, in which the X-ray generator and the X-ray receiving device are moved by rotating the rollers that are in contact with the outer peripheral surface of the pipe.

[0019] According to this invention, the X-ray generator and the X-ray receiver are moved by rotating the rollers in contact with the outer circumferential surface of the pipe. This makes it easy to align the X-ray generator and the X-ray receiver on the outer circumferential surface of the pipe. Furthermore, the time required for movement can be shortened, and the time required for inspection can be shortened.

[0020] When imaging the piping, the piping, the X-ray generator, and the X-ray receiving device may be fixed by a fixing magnet provided in a middle part of the frame.

[0021] According to this invention, when imaging the piping, the piping, the X-ray generator, and the X-ray receiving device are fixed by the fixing magnets, which makes it possible to prevent the X-ray generator and the X-ray receiving device from shaking when imaging the piping.

[0022] The X-ray generator and the X-ray receiving device may be moved at predetermined intervals in a circumferential direction of the pipe to capture images of the circumferential weld of the pipe.

[0023] According to this invention, the X-ray generator and the X-ray receiver are moved at predetermined intervals in the circumferential direction of the pipe to image the circumferential weld of the pipe. This makes it possible to smoothly image the pipe from all angles around the circumference of the pipe during the inspection of the circumferential weld, which requires repeating the movement and imaging multiple times, and to obtain proper inspection results for the circumferential weld.

[0024] Furthermore, a method of installing a piping inspection device according to the present invention is a method of installing a piping inspection device comprising at least a frame, a first roller, a second roller, and an X-ray generator to a piping, comprising a first step of installing the frame having the first roller provided thereon to the piping, a second step of installing the second roller to the frame after the first step, and a third step of installing the X-ray generator to the frame after the second step.

[0025] Moreover, the piping inspection apparatus may further include a fixing magnet, and after the second step, a fixing step of fixing the piping and the frame by the fixing magnet may be provided.

[0026] According to this invention, after the second step, the piping and the frame are fixed by the fixing magnets, which makes it possible to prevent the frame and the piping from becoming misaligned in the third step, and therefore makes it possible to carry out the third step more safely.

[0027] The method may further include, before the first step, a step of excavating an area around the piping.

[0028] According to this invention, a digging step of digging around the piping is provided before the first step, which allows the inspection to be performed more efficiently by providing a mark for aligning the X-ray generator and the X-ray receiving device when performing the inspection. Effect of the Invention

[0029] According to the present invention, it is possible to provide an inspection device that is simple in structure and lightweight. [Brief description of the drawings]

[0030] [Figure 1] 1 is a perspective view showing a piping inspection device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a side view of the piping inspection device shown in FIG. [Diagram 3] 1. This is a modified example of the pipe inspection device shown in FIG. 1, showing a case where the pipe has a large diameter. [Figure 4] 11 is a diagram showing a state in which a frame is attached to a pipe in a mounting process of a pipe inspection device according to an embodiment of the present invention. FIG. [Diagram 5] 13 is a diagram showing a state in which a second roller is attached to a frame attached to a pipe in a mounting process of a pipe inspection device according to an embodiment of the present invention. FIG. [Figure 6] 1 is a diagram showing a state in which a pipe is irradiated with X-rays by a pipe inspection device according to an embodiment of the present invention. FIG. [Figure 7] FIG. 7 is a diagram showing a state in which the direction of X-ray irradiation in FIG. 6 is changed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] A piping inspection device 100 according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the piping inspection device 100 includes a frame 10, an X-ray receiving device 20, an X-ray generator 30, a roller 40, a fixing magnet 50, and a counterweight 60. The piping inspection device 100 is attached to the piping P and is used mainly to inspect a circumferential weld L of the piping P (described later).

[0032] The frame 10 is a member that supports each component part of the piping inspection device 100. In this embodiment, for example, aluminum is preferably used for the frame 10. The frame 10 includes a top plate 10t and a support column 10s. The top board 10t is provided at one end of the frame 10. An X-ray receiving device 20 (described later) is provided on the top board 10t.

[0033] The columns 10s support the top plate 10t. The columns 10s are rod-shaped members that are provided perpendicular to the top plate 10t at the four corners of the top plate 10t. As shown in Figs. 1 and 2, the columns 10s are provided so as to sandwich the pipe P to be inspected from both sides perpendicular to the axis of the pipe P. One end of the support pillar 10s in the frame 10 is connected to the tabletop 10t, and the other end is attached to a mounting portion 31 of the X-ray generator 30 (described later). A roller 40 and a fixing magnet 50 are provided in the middle of the support pillar 10s (described later). Thus, the frame 10 has a U-shape formed by the top plate 10t and the support columns 10s.

[0034] The X-ray receiving device 20 converts the X-rays emitted by an X-ray generator 30 (described later) into a digital signal to create an image. In this way, inspection is performed by imaging the internal state of the pipe P. Hereinafter, the imaging may be referred to as photography. In this embodiment, a known FPD (flat panel detector) is preferably used for the X-ray receiving device 20. As described above, the X-ray receiving device 20 is provided on the tabletop 10t. In addition, the X-ray receiving device 20 is supplied with power by a power cable (not shown).

[0035] The X-ray generator 30 serves to irradiate X-rays toward the X-ray receiving device 20. As the X-ray generator 30, a known X-ray generating device is suitably used. The X-ray generator 30 also has a mounting part 31. The mounting part 31 may be a plate-like member as shown in Fig. 1, or may have another shape. The X-ray generator 30 is fixed to the other end of the frame 10 by the mounting part 31. The X-ray generator 30 is supplied with power by a power cable (not shown).

[0036] As described above, the X-ray receiving device 20 is attached to the tabletop 10t provided at one end of the frame 10. The X-ray generator 30 is attached to the other end of the frame 10 by a mounting portion 31. That is, as shown in Fig. 2, the X-ray receiving device 20 and the X-ray generator 30 are provided so as to face each other with the piping P therebetween.

[0037] The rollers 40 are cylindrical rotating members arranged in a plurality of positions in the middle of the frame 10. The central axis of the rollers 40 is parallel to the central axis of the pipe P. The rollers 40 are in direct contact with the pipe P. When the rollers 40 rotate in this state, the pipe inspection device 100 moves around the pipe P. In this embodiment, the rollers 40 do not have a driving unit. This allows the rollers 40 to be rotated manually. In this embodiment, for example, hard urethane is suitably used for the rollers 40. The rollers 40 include a first roller 41 and a second roller 42.

[0038] The first rollers 41 are provided as a pair in the middle of the support 10s of the frame 10, closer to one end than the pipe P. As shown in Fig. 2, the first rollers 41 are attached to the support 10s via the top plate 10t and a first arm 41a. The first rollers 41 may be attached only to the top plate 10t, or only to the support 10s. The first arm 41a is a member that connects between the support 10s and the first roller 41, and may have any shape. The first arm 41a rotatably supports the first roller 41. The position and size of the first arm 41a can be adjusted in accordance with the diameter of the pipe P attached to the pipe inspection device 100.

[0039] The second rollers 42 are provided as a pair in the middle of the support 10s of the frame 10, closer to the other end than the pipe P. The second rollers 42 are attached to the support 10s via a second arm 42a. The second arm 42a is a member that connects between the support 10s and the second roller 42, and may have any shape. The second arm 42a rotatably supports the second roller 42. The position and size of the second arm 42a are adjustable in accordance with the diameter of the pipe P attached to the pipe inspection device 100 (described later). As described above, the first roller 41 and the second roller 42 are each provided in pairs on the support pillars 10s of the frame 10, and each are in contact with the pipe P. In other words, the pipe P is supported by the rollers 40 at a total of four locations.

[0040] The fixing magnet 50 fixes the pipe P and the pipe inspection device 100 by magnetic force. This serves to prevent the positions of the pipe P and the pipe inspection device 100 from being displaced when the pipe P is irradiated with X-rays to capture an image of the internal state. The fixing magnet 50 is attached by a fixing member 51 between the first roller 41 and the second roller 42 of the support 10s, as shown in Fig. 2. The fixing magnets 50 are provided in a pair so as to sandwich the pipe P from both sides in the radial direction.

[0041] The fixing magnet 50 has a switch, and by switching the switch on and off, it is possible to generate a magnetic force or to stop the magnetic force from acting. In other words, the fixing magnet 50 can be magnetically attached to the piping P in a detachable manner. Furthermore, when a magnetic force is generated in the fixing magnet 50, the fixing magnet 50 comes into contact with the piping P, and when no magnetic force is acting, a gap is provided between the piping P and the fixing magnet 50. In other words, the fixing magnet 50 can move linearly in the radial direction of the piping P when attached to the support 10s by the fixing member 51.

[0042] In this embodiment, for example, a known magnet holder is preferably used as the fixing magnet 50. More specifically, for example, a magnet holder stand (e.g., model number: MB-PB) manufactured by Kanetec Corporation or an on-off magnet (e.g., model number: DG0036) manufactured by Noga Waters Corporation can be preferably used as the fixing magnet 50. Thereby, when the piping inspection device 100 is moved, the fixing magnet 50 is moved with the switch of the fixing magnet 50 turned off, and when the piping P is X-rayed, the fixing magnet 50 is fixed by turning on the switch of the fixing magnet 50.

[0043] The counterweight 60 is a weight that adjusts the center of gravity of the piping inspection apparatus 100 to coincide with the central axis of the piping P when the piping inspection apparatus 100 is attached to the piping P. In this embodiment, since the X-ray receiving device 20 is lighter than the X-ray generator 30, the counterweight 60 is provided, for example, on the top board 10t together with the X-ray receiving device 20 as shown in FIG. 1. That is, in this embodiment, the counterweight 60 is provided, for example, to adjust the weight difference between the X-ray receiving device 20 and the X-ray generator 30. This allows the piping inspection apparatus 100 to move around the piping P in a stable manner.

[0044] In the piping inspection device 100 according to this embodiment, the diameters of the piping P to be inspected are as follows: That is, the main targets are pipes with a diameter of 100A (approximately 100 mm), a diameter of 150A (approximately 150 mm), a diameter of 200A (approximately 200 mm), and a diameter of 300A (approximately 300 mm).

[0045] Furthermore, depending on the relationship between the diameter of the pipe P to be inspected and the center distance of each roller 40 and the outer diameter of each roller 40, the pipe P may interfere with other components of the pipe inspection device 100.

[0046] For this reason, each component part of the piping inspection device 100 needs to be adapted to the diameter of the piping P. For example, the axial distance between the first rollers 41 and between the second rollers 42 is adjusted by the first arm 41a and the second arm 42a. At this time, the adjustment may be made by providing the first arm 41a and the second arm 42a with an extension function, or by replacing the first arm 41a and the second arm 42a with ones having a corresponding shape.

[0047] The inter-axial distance between the first roller 41 and the second roller 42 is adjusted by the mounting positions of the first roller 41 and the second roller 42 on the support 10s. For example, the support 10s may be provided with a plurality of mounting positions for the first arm 41a and the second arm 42a, or the support 10s may be configured so that the first arm 41a and the second arm 42a can slide on the support 10s.

[0048] The piping inspection device 100 according to the present embodiment is preferably used, for example, in inspecting the circumferential weld L of a pipe P constructed underground at a drainage pipe construction site. Therefore, it may be difficult to secure a sufficient area around the pipe P when carrying out the inspection. For this reason, it is preferable that each component is provided within a range of 300 mm from the outer circumferential surface of the pipe P. In other words, it is preferable that no component is provided within a range of more than 300 mm from the outer circumferential surface of the pipe P.

[0049] Here, if one type of component is used to accommodate a wide range of diameters of the pipe P, each component may become larger than necessary. For this reason, it is preferable to narrow the range of diameters of the pipe P that can be accommodated by one type of component and replace the component as needed. Table 1 shows the relationship between the diameter of the pipe P and each component.

[0050] [Table 1]

[0051] As shown in Table 1, one type of top plate 10t, fixing magnet 50, X-ray receiving device 20, and X-ray generator 30 can be used. In contrast, it is preferable to adjust the length of support 10s and the outer diameter of roller 40 by replacing parts according to the diameter of pipe P. Also, as shown in Table 1, support 10s is made of two types of material corresponding to four types of diameter of pipe P, while four types of outer diameter of roller 40 are provided to match each diameter. In this way, by setting the number of types of components to a minimum, the overall number of parts required is reduced. When a large-diameter pipe P is used, an expansion member 10e may be provided at one end of the support 10s as shown in FIG. 3 to increase the distance between the support 10s in the direction perpendicular to the axis.

[0052] Next, a method of attaching the piping inspection device 100 to the piping P at the work site will be described with reference to FIGS. (Drilling step) In the first step described below, excavation is performed around the pipe P. This is a so-called marking work for providing a mark when, for example, attaching the pipe inspection device 100 to the pipe P or when the pipe inspection device 100 moves around the pipe P during inspection. This improves the efficiency of the attachment of the pipe inspection device 100 and the inspection of the pipe P using the pipe inspection device 100.

[0053] (First Step) 4, the frame 10 to which the X-ray receiving device 20, the first roller 41, and the fixing magnet 50 are attached is placed on the piping P. At this time, it is confirmed that the first rollers 41 are securely in contact with the piping P at two locations.

[0054] (Second step) After the first step, as shown in Fig. 5, the second rollers 42 are attached to the support columns 10s of the frame 10 from the other end side of the frame 10. The pair of first rollers 41 and the pair of second rollers 42 are attached so as to sandwich the pipe P. At this time, it is confirmed that the second rollers 42 are securely in contact with the pipe P at two locations.

[0055] (fixed step) After the second step, the switch of the fixing magnet 50 is turned on to fix the pipe P and the frame 10. This ensures the safety of the work in the third step described below.

[0056] (Third Step) After the second step, as shown in Fig. 2, the X-ray generator 30 is attached to the other end of the support column 10s of the frame 10. At this time, it is preferable that the mounting portion 31 of the X-ray generator 30 and the other end of the support column 10s are fixed to each other by, for example, bolt fastening. Through these steps, the piping inspection device 100 is fixed to the piping P.

[0057] Next, a method for inspecting a pipe P using the pipe inspection device 100 according to this embodiment will be described. As described above, the pipe inspection device 100 according to this embodiment is used when inspecting the circumferential welded portion L of the pipe P constructed underground or the like at a construction site, and therefore the pipe P is fixed to the construction site. For this reason, the pipe inspection device 100 is moved so as to rotate around the fixed pipe P to perform the inspection. In this embodiment, the pipe inspection device 100 is moved manually.

[0058] 6, with the piping inspection device 100 attached to the piping P by the above-mentioned process, X-rays are irradiated from the outer periphery of the piping P toward the piping P by the X-ray generator 30. At this time, the switch of the fixing magnet 50 is turned on to fix the piping inspection device 100 and the piping P in place. The irradiated X-rays are detected and imaged by X-ray receiving devices 20 provided at opposing positions across the pipe P. In this way, the circumferential weld L of the pipe P is photographed with an X-ray, and the internal condition of the pipe P can be visually confirmed.

[0059] When the image of the pipe P at a given location has been captured, the switch of the fixing magnet 50 is turned off. This makes it possible to manually move the pipe inspection device 100 fixed to the pipe P in the circumferential direction of the pipe P. In this manner, the piping inspection device 100 is manually moved to an arbitrary angle as shown in Fig. 7. After that, the switch of the fixing magnet 50 is turned on to fix the piping inspection device 100 to the piping P again. In this state, the above-mentioned photographing is performed again.

[0060] The interval at which the piping inspection device 100 is moved around the piping P is set based on the JIS standard (JIS Z 3110 (2017)), and is preferably set based on the effective imaging length of the X-ray receiving device 20 as necessary (for example, according to the diameter of the piping P). For example, if the pipe P has a diameter of 300A, and an overlap of about 10 mm is provided on both ends to capture an image of the entire circumference of the pipe P in 10 segments, the effective capture width can be set to 100 mm. Based on this, consider a case where the dimension of the X-ray receiving device 20 in the circumferential direction of the pipe P is 130 mm. In this case, an overlap of 15 mm is provided on both ends for the captured images, and the effective capture width is set to a maximum of 100 mm. Based on this, the movement interval of the pipe inspection device 100 is set to 100 mm. At this time, in the above-mentioned excavation step, it is preferable to provide marks on the circumference of the pipe P at intervals of 100 mm.

[0061] In addition, when photographing the circumferential weld L, the photograph is taken according to a known double-wall one-sided photographing method or a known double-wall two-sided photographing method.

[0062] As described above, according to the piping inspection device 100 of this embodiment, the multiple rollers 40 in contact with the piping P rotate along the outer circumferential surface of the piping P. As a result, the X-ray generator 30 and the X-ray receiving device 20 move in the circumferential direction of the piping P in conjunction with the rotation of the rollers 40. As a result, it is possible to move the piping inspection device 100 around the piping P without the need to attach a separate base portion or the like to the piping P. Moreover, the movement can be performed manually without using a drive unit. In this way, by simplifying the structure, the weight of the piping inspection device 100 can be reduced. Therefore, for example, when the piping inspection device 100 is used to inspect the welded parts of the piping P at a construction site, the installation of the piping inspection device 100 and the inspection work can be easily performed.

[0063] Furthermore, the pipe P and the frame 10 are fixed by a fixing magnet 50. This allows the pipe P to be irradiated with X-rays in a stable state, thereby enabling the inspection to be performed more safely and accurately.

[0064] Further, a counterweight 60 is provided on the frame 10. This can eliminate the weight difference between, for example, the X-ray generator 30 and the X-ray receiving device 20. This can bring the center of gravity of the piping inspection device 100 closer to the center of the piping P. This can prevent the weight from being biased when the piping inspection device 100 is moved in the circumferential direction of the piping P, which can contribute to safer inspection work.

[0065] Moreover, the rollers 40 and the X-ray generator 30 are removable from the frame 10. This allows the piping inspection device 100 to be attached to the piping P without moving the position of the piping P.

[0066] Furthermore, the diameter of the rollers 40 and the length of the frame 10 are adjusted according to the diameter of the pipe P. This makes it possible to more widely accommodate pipes P having various diameters.

[0067] Moreover, each component is provided within a range of 300 mm from the outer circumferential surface of the pipe P. In other words, no component is located within a range of more than 300 mm from the outer circumferential surface of the pipe P. As a result, at the site where the pipe inspection device 100 is used, as long as an area of ​​at least 300 mm or more is secured from the outer circumferential surface of the pipe P, inspection can be performed without interfering with objects located in the vicinity.

[0068] Moreover, the X-ray generator 30 and the X-ray receiving device 20 are moved by rotating the rollers 40 in contact with the outer circumferential surface of the piping P. This makes it possible to easily align the X-ray generator 30 and the X-ray receiving device 20 on the outer circumferential surface of the piping P. Furthermore, the time required for movement can be shortened, and the time required for inspection can be shortened.

[0069] Furthermore, when imaging the piping P, the piping P, the X-ray generator 30, and the X-ray receiving device 20 are fixed by a fixing magnet 50. This makes it possible to prevent the X-ray generator 30 and the X-ray receiving device 20 from shaking when imaging the piping P.

[0070] Moreover, the X-ray generator 30 and the X-ray receiving device 20 are moved at predetermined intervals in the circumferential direction of the piping P to image the piping P. Furthermore, the intervals are set based on the effective imaging length of the X-ray receiving device 20. This makes it possible to image the piping P from all angles around the periphery of the piping P and obtain more accurate inspection results.

[0071] Furthermore, after the second step, the piping P and the frame 10 are fixed together by the fixing magnets 50. This makes it possible to prevent the frame 10 and the piping P from becoming misaligned in the third step. Therefore, the third step can be performed more safely.

[0072] In addition, a digging process is provided before the first step, in which digging is performed around the piping P. This makes it possible to provide a mark for aligning the X-ray generator 30 and the X-ray receiving device 20 when performing the inspection, thereby making it possible to perform the inspection more efficiently.

[0073] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the piping inspection device 100 according to this embodiment may be used to inspect a location of the piping P other than the circumferential welded portion. Furthermore, the fixing magnets 50 do not have to be provided in a pair. For example, one fixing magnet 50 may be provided between the top plate 10t and the piping P. Furthermore, the relationship between the diameter of the pipe P and each component part may be a combination other than that shown in Table 1.

[0074] In addition, within the scope of the invention, the components in the above-described embodiments may be replaced with well-known components, and the above-described modified examples may be combined as appropriate. [Explanation of symbols]

[0075] 10 Frames 20 X-ray receiver 30 X-ray generator 40 Lola 41 First Roller 42 Second Roller 50 Fixing magnet 60 Counterweight 100 Piping inspection equipment P piping

Claims

1. A pipe inspection device that performs inspection by irradiating an outer periphery of a pipe with X-rays, a frame in which the piping is disposed; an X-ray receiving device disposed at one end of the frame; an X-ray generator disposed at the other end of the frame and facing the X-ray receiving device; A plurality of rollers are disposed in an intermediate portion of the frame, the rollers being in contact with the pipe and rotating along an outer peripheral surface of the pipe; Equipped with The plurality of rollers include A pair of first rollers provided on one end side of the pipe; A pair of second rollers provided on the other end side of the pipe; having The first roller is rotatably supported by a first arm, The second roller is rotatably supported by a second arm, an axis-to-axis distance between the first rollers and an axis-to-axis distance between the second rollers are adjusted by the first arm and the second arm; Piping inspection equipment.

2. A pipe inspection device that performs inspection by irradiating an outer periphery of a pipe with X-rays, a frame in which the piping is disposed; an X-ray receiving device disposed at one end of the frame; an X-ray generator disposed at the other end of the frame and facing the X-ray receiving device; A plurality of rollers are disposed in an intermediate portion of the frame, the rollers being in contact with the pipe and rotating along an outer peripheral surface of the pipe; Equipped with The frame has a U-shape formed by a top plate and a support, The support columns are provided to sandwich the pipe from both sides in a direction perpendicular to the axis of the pipe, one end of the support column is connected to the tabletop and the other end of the support column is attached to a mounting portion of the X-ray generator; Piping inspection equipment.

3. A fixing magnet is provided in the middle of the frame and is detachably attached to the pipe. The piping inspection device according to claim 1 or 2.

4. The frame is provided with a counterweight. The piping inspection device according to any one of claims 1 to 3.

5. The roller and the X-ray generator are removable from the frame. The piping inspection device according to any one of claims 1 to 4.

6. The diameter of the roller and the length of the frame are adjusted according to the diameter of the pipe. The piping inspection device according to any one of claims 1 to 5.

7. Each component is provided within a range of 300 mm from the outer peripheral surface of the pipe. The piping inspection device according to any one of claims 1 to 6.

8. The piping is installed underground and excavated around it, The inspection is an inspection of a girth weld of the piping. The piping inspection device according to any one of claims 1 to 7.

9. A piping inspection method using the piping inspection device according to any one of claims 1 to 8, comprising: the X-ray generator and the X-ray receiving device are moved by rotating the rollers in contact with the outer circumferential surface of the pipe; How to inspect piping.

10. When imaging the pipe, the pipe, the X-ray generator, and the X-ray receiving device are fixed by a fixing magnet provided in a middle part of the frame. The piping inspection method according to claim 9.

11. The X-ray generator and the X-ray receiving device are moved at predetermined intervals in a circumferential direction of the pipe to capture an image of the circumferential weld of the pipe. The piping inspection method according to claim 9 or 10.

12. A method for attaching a pipe inspection device, the method comprising: a first step of attaching the frame provided with the first roller to the piping; a second step of attaching the second roller to the frame after the first step; a third step, subsequent to the second step, of mounting the X-ray generator on the frame; Equipped with How to install a piping inspection device.

13. The piping inspection device further includes a fixing magnet, a fixing step of fixing the piping and the frame by the fixing magnet after the second step, A method for mounting the piping inspection device according to claim 12.

14. The method further includes a step of excavating a periphery of the piping before the first step. A method for mounting the piping inspection device according to claim 12 or 13.

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