JPH04126158U - Piping flaw detection equipment - Google Patents

Abstract

(57) [Summary] [Structure] A chain 9 wrapped around the outer circumference 2a of the pipe 2 moves the moving unit 4 that moves along the guide rail 3 provided on the outer circumference 2a of the pipe 2, and a tensioning means 11 that tensions the chain 9. A guide arm 1 is provided on the outer peripheral part 2a of the pipe 2 and extends along the longitudinal direction of the pipe 2.
A probe 23 that detects flaws while contacting the outer circumferential portion 2a of the pipe 2 is provided on the side portion 15a of the slider 15 that is provided on the side portion 13a of the pipe 2 and is slidable along the side portion 13a. . [Effects] The distance from the upper end of the guide arm 13 to the pipe 2 can be made small, and the device 1 itself can be made flat and compact, and flaw detection can be performed well even in areas with small clearances where the pipes 2, etc. are complicated.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a piping flaw detection device that detects flaws in welded parts of piping in nuclear power plants, etc. Regarding.

0002

[Conventional technology]

Conventionally, it has been used as a piping flaw detection device to detect welded parts of piping in nuclear power plants, etc. For example, the structure shown in FIG. 2 can be mentioned. This piping flaw detection device 50 is A ring-shaped guide rack 52 is fixed to the outer peripheral part 51a of the pipe 51, and this guide rack The moving unit 53, which has a built-in pinion (not shown) that engages with the guide rack 52, is moved to the guide rack. The movable unit 53 is provided on the gear wheel 52, and by driving the pinion, It is moved along the idle rack 52, and the moving unit 53 includes a pipe 51. A ball screw 54 extending along the longitudinal direction, and a mover that meshes with the ball screw 54 and moves. 55, the mover 55 has a movable member 55 that moves in the direction of the pipe 51 to A probe 57 that contacts the portion 51a and detects the welded portion 56 etc. is provided on the lower surface 55a side thereof. It is being

0003

[Problem that the idea aims to solve]

However, in the piping flaw detection device 50 having the above structure, the probe 57 is a movable member. Since the probe 57 is provided on the lower surface 55a side of the probe 55, it is difficult to move the probe 57 toward the pipe 51. The distance between the upper end of the pipe flaw detection device 50 and the pipe 51 is large due to the mechanism for moving the pipe. It is said that inspection is difficult in places with complicated piping and little clearance. There was a problem.

0004 Therefore, the purpose of this invention is to solve the problem in places where piping etc. are complicated and there is little clearance. An object of the present invention is to provide a compact piping flaw detection device that enables inspection.

[0005]

[Means to solve the problem] In order to achieve the above purpose, the piping flaw detection device of the present invention is installed on the outer periphery of the piping. A ring-shaped guide rail that extends along the outer periphery of the piping along the guide rail. and a moving unit that moves in the circumferential direction, and the moving unit includes a a chain wrapped around the periphery and tensioning the chain to move the moving unit; tensioning means for pressing the chain and the outer periphery of the pipe; and a rotatable roller interposed between the A guide arm is provided on the side surface of the guide arm, and a side surface of the guide arm is slidable along the side surface. A flexible slider is provided, and a side portion of the slider is in contact with the outer circumferential portion of the pipe. It is characterized by being equipped with a probe for flaw detection.

[0006]

[Effect]

According to the piping flaw detection device of the present invention, the moving unit moves along the guide rail to inspect the piping. It moves in the circumferential direction, along the side part of the guide arm provided on the moving unit. When the slider slides, the probe attached to the side of the slider comes into contact with the outer circumference of the pipe and performs the search. It will hurt you. Therefore, a slider is provided on the side surface of the guide arm. Since the probe is installed on the side of the guide arm instead of the bottom, piping can be connected from the top of the guide arm. The distance can be reduced. In addition, the chain installed on the mobile unit by wrapping the chain around the outer circumference of the pipe and tensioning this chain with a tensioning means. The moving unit can be installed on the guide rail on the outer circumference of the pipe with one touch. Wear.

[0007]

【Example】

A piping flaw detection apparatus according to an embodiment of the present invention will be described below with reference to FIG. In the figure, symbol 1 is the piping flaw detection device of this embodiment, and symbol 2 is the flaw detected by the piping flaw detection device 1. The piping 3 is a component of the piping flaw detection device 1 and is located on the outer circumference 2a of the piping 2. The provided ring-shaped guide rail, reference numeral 4, is a component of the piping flaw detection device 1. A moving unit that moves in the circumferential direction along the guide rail 3 on the outer periphery 2a of the pipe 2. are shown respectively.

[0008] The guide rail 3 has an annular shape, and has a plurality of hinge parts 5 (in Fig. 1). The outer circumference 2 of the pipe 2 is bent outward at the a, and in this state, by locking the locking parts 6 at both ends, the pipe 2 It is designed to be fixed on the outer peripheral portion 2a. Furthermore, the width of this guide rail 3 is It is determined as appropriate depending on the distance between the coaxial drive rollers of the moving unit 4, which will be described later. It is something.

[0009] The moving unit 4 includes a drive roller 7 for moving on the outer circumference 2a of the pipe 2. A plurality of drive rollers 7 are provided at the bottom of the drive roller 7, and one of the drive rollers 7 is provided on the same axis. The distance between them is set so that they sandwich both sides 3a of the guide rail 3. I'm being kicked. A roller drive belt 8 or the like is connected to these drive rollers 7. A drive motor (not shown) is connected to the drive roller 7. is driven, and the moving unit 4 moves along the guide rail 3 over the outer periphery 2a of the pipe 2. It is designed to move in the circumferential direction.

0010 Further, the moving unit 4 is provided on the outer peripheral portion 2a of the pipe 2. One end of the chain 9 (not shown in Figure 1) is fixed and the other end After the part 10 wraps the chain 9 around the outer peripheral part 2a of the pipe 2, this chain 9 It is detachably provided on the tensioning means 11 for tensioning. And this chi The chain 9 is placed on both sides 9a of the chain 9 so that it does not come into contact with the outer circumference 2a of the pipe 2. Rollers 12 that can freely roll between these are provided at a predetermined pitch. There is. The roller 12 causes the moving unit 4 to move along the guide rail 3. When moving, the chain 9 also moves along the outer circumference 2a of the pipe 2. In addition, The tension means 11 is configured to tighten the outer circumference 2a of the pipe 2 when the chain 9 is wound around the pipe 2. The chain 9 is tightened by folding the arm 11a facing tangentially toward the pipe 2. It's something that makes you stretch.

[0011] The moving unit 4 has a guide arm extending along the longitudinal direction of the pipe 2. 13 is provided on the side surface 13a of the guide arm 13, extending in the same direction. A linear guide 14 is provided. Side part 14a of this linear guide 14 , a slider 15 having a U-shaped cross section protrudes toward the upper surface portion 14b and the lower surface portion 14c. are fitted to each other, and a side portion 15a of the slider 15 has a side portion 15a projecting laterally. A shaft portion 16 is provided. Here, the inside of the guide arm 13 includes the guide arm 13. A slider wound between pulleys 17 provided near the tip and rear end of the arm 13 A drive belt 18 is provided, and an upper side 18a of this slider drive belt 18 has a The upper part 15b of the slider 15 is provided, and the slider drive belt 18 is a belt drive member. The slider 15 slides along the linear guide 14 by being driven by the moving motor 19. It is designed to move.

0012 Further, at the tip of the shaft portion 16 of the slider 15, an arm 20 that is orthogonal to the shaft portion 16 is provided. The arm 20 is fixed, and a swingable frame 21 is provided at the tip of the arm 20. ing. Here, an arm 20 is biased toward the outer circumferential portion 2a of the pipe 2 on the shaft portion 16. A torsion spring 22 is provided, and the flaw detection is performed while contacting the outer circumference 2a of the pipe 2. The probes 23 for the purpose of A plurality of ultrasonic waves are provided in the frame 21 so that the ultrasonic waves are incident on the welded portion 24 etc. of the pipe 2. ing. Note that the frame 21 on which the probe 23 is provided is not attached to the arm 20. They are arranged so that they are almost parallel when held together.

[0013] In the piping flaw detection device 1 having such a structure, a guide rail is provided on the outer circumferential portion 2a of the piping 2. The guide rail 3 is wrapped around and fixed, and the guide rail 3 is sandwiched between the coaxial drive rollers 7. Wrap the chain 9 in the soldered state and attach the end 10 to the tensioning means 11. By tensioning the chain 9 with the tensioning means 11 of Press on top. Then, the slider drive belt 18 is driven by the belt drive motor 19. The slider 15 is moved along the linear guide 14, and the probe 23 is inspected. While in contact with the contact portion 24, rotate the drive roller 7 of the moving unit 4 to The moving unit 4 is moved in the circumferential direction and the welded portion 24 formed in this direction is inspected. It has become so. Note that the arm 20 is always connected to the piping 2 by the torsion spring 22. Since the probe 23 is urged to contact the outer circumferential portion 2a, the moving unit Even if the probe 4 is located on the lower side, the probe 23 will not be separated from the outer circumference 2a of the pipe 2. do not have.

[0014]

[Effect of the idea]

As detailed above, according to the piping flaw detection device of the present invention, the side surface of the guide arm Since the slider is installed on the slider and the probe is installed on the side instead of the bottom, the The distance from the top of the side arm to the piping is shortened, making the device itself flat and compact. can be manufactured. Therefore, areas with small clearances where piping, etc. are complicated. It is also possible to perform flaw detection successfully. In addition, the chain installed on the mobile unit By winding the chain around the outer circumference of the pipe and tensioning this chain with a tensioning means. The moving unit can be installed on the outer circumference of the pipe with a single touch, making work easier. can significantly improve performance. In addition, the circumferential direction of the moving unit is Since there is no need to use rack guides to move the parts, parts costs can be reduced. Wear.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a pipe flaw detection device according to an embodiment of the present invention.

FIG. 2 is a schematic side view showing a conventional piping flaw detection device.

[Explanation of symbols]

1 Piping flaw detection equipment 2 Piping 2a Outer periphery 3 Guide rail 4 Mobile unit 9 chain 11 Tensioning means 12 Roller 13 Guide arm 13a Side part 15 Slider 15a side part 23 Probe

Claims (1)

[Scope of utility model registration request] 1. A ring-shaped guide rail provided on the outer periphery of a pipe, and a moving unit that moves circumferentially on the outer periphery of the pipe along the guide rail, the moving unit comprising: a chain wound around the outer periphery of the piping; a tensioning means for tensioning the chain and pressing the moving unit against the outer periphery of the piping; and a freely rolling mechanism interposed between the chain and the outer periphery of the piping. a roller and a guide arm extending along the longitudinal direction of the pipe, a slider that is slidable along the side surface of the guide arm is provided, and a slider that is slidable along the side surface of the guide arm is provided. A piping flaw detection apparatus characterized in that a probe is provided on a side of the mover to detect flaws while contacting the outer circumference of the piping.