JP5813735B2 - Non-destructive inspection equipment for piping - Google Patents

Description

  The present invention relates to a nondestructive inspection apparatus for piping that performs nondestructive inspection from an outer wall surface of a pipe, and in particular, nondestructive piping that can inspect the inner wall surface of a pipe by moving a measuring device on the outer wall surface of the pipe. It relates to an inspection device.

Conventionally, various inspection apparatuses have been developed in order to perform nondestructive inspection of a pipe inner wall surface from a pipe outer wall surface.
For example, a pipe inspection apparatus including a rail fixed on a pipe, a carriage driven so as to travel on the rail via wheels, and a sensor unit fixed to the carriage and measuring the thickness of the pipe. It is disclosed (see Patent Document 1). The rail is formed in a predetermined length, and is fixed to the upper part of the pipe with a fixture at an appropriate interval.

  Also, a portable X-ray generator that irradiates piping with X-rays, and a portable X-ray generator that is opposed to the portable X-ray generator centered on the piping, and arranges the intensity of transmitted X-rays that pass through the piping in a direction perpendicular to the pipe axis direction of the piping A one-dimensional array sensor for sampling data by a sensor to be used, a portable X-ray generator and a first traveling mechanism for simultaneously reciprocating the one-dimensional array sensor in the pipe axis direction of the pipe, and the portable X-ray generator for the pipe of the pipe A pipe corrosion inspection apparatus is disclosed that includes a second traveling mechanism that reciprocates in a direction orthogonal to the axial direction (see Patent Document 2).

  The first traveling mechanism includes a slide base on which the one-dimensional array sensor is fixed, a slide shaft for reciprocating the slide base in the pipe axis direction of the pipe, and a pair of fixed bases that arrange the slide axis on the pipe And two belts for fixing the pair of fixed bases to the pipes.

  The second traveling mechanism includes a moving base on which the portable X-ray generator is fixed, a moving shaft for reciprocating the moving base in a direction perpendicular to the pipe axis direction of the pipe, and the moving shaft on the slide base. And a pair of fixed bases fixed to the slide base for placement.

JP 2007-285772 A JP 2001-4562 A

  However, in the pipe inspection apparatus disclosed in Patent Document 1, since the rail for moving the sensor unit on the pipe is fixed to the pipe, the sensor unit can be reliably moved on the pipe. However, it was difficult to divert easily.

  Further, in the pipe corrosion inspection apparatus disclosed in Patent Document 2, a pair of fixings to which a slide shaft is fixed, which is a first traveling mechanism that simultaneously reciprocates the portable X-ray generator and the one-dimensional array sensor in the pipe axis direction of the pipe. Since the base is fixed to the pipe by two belts, the portable X-ray generator and the one-dimensional array sensor can be reliably moved on the pipe, but cannot be easily diverted to other pipes. There was a difficulty.

  The present invention has been made to solve such a conventional problem, and it is possible to reliably reciprocate the main body of the apparatus on the pipe and to easily use the pipe for other pipes. It aims at providing a nondestructive inspection device.

The first nondestructive inspection apparatus of a is piping aspect of the present invention to achieve the above object, comprises a measurement device for performing non-destructive inspection of the pipe, the pipe by the traveling wheels which are arranged in parallel at predetermined intervals And a pair of guide rails arranged along the pipe axis direction of the pipe and rolling the traveling wheel by fitting a groove of the traveling wheel, and arranged in parallel at a predetermined interval. When the pair of guide rails are connected so that the pair of guide rails are arranged in parallel at equal intervals without causing the traveling wheels to be removed, and the apparatus body is mounted on the pair of guide rails via the traveling wheels. And a plurality of flexible belts that are deformed by being loaded with the weight of the apparatus main body and pressed against the pipe in a state along the peripheral wall of the pipe.

  According to the nondestructive inspection apparatus for piping according to the first aspect as described above, a pair of guide rails are connected by a plurality of flexible belts so as to be arranged in parallel at equal intervals. When the apparatus main body is placed on the pair of guide rails via the traveling wheels, the weight of the apparatus main body is applied to the plurality of flexible belts via the pair of guide rails, and the weight of the apparatus main body is applied. Since the belt is deformed and pressed against the pipe in a state along the peripheral wall of the pipe, the pair of guide rails can be laid in a stable state with respect to the pipe. Therefore, since the pair of guide rails can be laid in a stable state in other pipes, the apparatus main body can be reliably reciprocated on the pipes, and can be easily used for other pipes. become able to.

  The second aspect of the present invention is the piping nondestructive inspection apparatus according to the first aspect, wherein the guide rail has an engagement hole at one end and is inserted into the engagement hole at the other end. The engagement protrusion is provided, and the engagement wheel and the engagement protrusion are engaged with each other so that the traveling wheel is connected to the guide rail so as to be able to roll. In this specification, “insertion” means insertion and fitting.

  According to such a non-destructive inspection apparatus for piping as the second aspect, the travel distance of the apparatus main body can be extended, and even if the piping is curved, the apparatus is connected by connecting the curved guide rail. The travel distance of the main body can be extended.

  The third aspect of the present invention is the piping nondestructive inspection device according to the first aspect or the second aspect, wherein the guide rail is formed in a cylindrical shape, and the groove of the traveling wheel is fitted into the cylindrical guide rail. The cross section is formed in an arc shape.

  According to such a non-destructive inspection apparatus for piping according to the third aspect, since the guide rail is formed in a cylindrical shape, the size in the width direction of the pipe changes and the guide rail moves in the circumferential direction of the pipe. Even so, the traveling wheel can be fitted to the guide rail in a stable state.

  A fourth aspect of the present invention is a pipe nondestructive inspection device according to any one of the first aspect to the third aspect, wherein a plurality of jig bodies are fixed to the side of the guide rail installed on the pipe. And a rail set jig comprising a pair of cylindrical bodies arranged along the pipe axis direction of the pipe and fixed to the jig body in contact with the peripheral wall of the pipe and spaced apart in the circumferential direction It is.

  According to the non-destructive inspection apparatus for piping according to the fourth aspect as described above, the two cylindrical bodies of the rail set jig are in line contact with each other along the pipe axis direction of the pipe. Even if the diameter changes, it can be installed in a stable state.

  According to a fifth aspect of the present invention, in the nondestructive inspection apparatus for piping according to the fourth aspect, the cylindrical body is a metal round pipe and an annular rubber shape fixed in a state of covering the outer periphery of the metal round pipe. It is comprised from an elastic body.

  According to the non-destructive inspection apparatus for piping according to the fifth aspect as described above, since the contact portion of the cylindrical body used for the rail setting jig is a rubber-like elastic body, the guide rail can be set without damaging the pipe. By using rubber having a high friction coefficient, the guide rail can be stably installed at a predetermined position on the pipe.

  According to a sixth aspect of the present invention, in the pipe nondestructive inspection apparatus according to the fourth or fifth aspect, the belt is detachably sandwiched between the jig body and the cylindrical body. In the present specification, “clamping” means supporting in a sandwiched state.

  According to such a nondestructive inspection apparatus for piping according to the sixth aspect, the position of the belt fixed to the rail set jig can be adjusted, so that a pair of guide rails are selected according to the size in the width direction of the pipe. Can be maintained.

  According to the nondestructive inspection apparatus for piping of the present invention, the pair of guide rails can be stabilized only by placing the pair of guide rails on the pipe and placing the apparatus main body on the pair of guide rails on the pipe via the traveling wheels. Thus, the apparatus main body can be reliably reciprocated on the pipe and can be easily used for other pipes.

It is a figure which shows preferable embodiment in the nondestructive inspection apparatus of piping of this invention, (A) is a front view, (B) is a side view. It is a perspective view which shows a pair of guide rail and belt which are the components in the nondestructive inspection apparatus of piping of this invention. It is a perspective view which shows the relationship between the jig | tool for rail sets which is a component in the nondestructive inspection apparatus of piping of this invention, and a belt.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for implementing a nondestructive inspection apparatus for piping according to the present invention will be described with reference to the drawings.
The non-destructive inspection apparatus for piping according to the present invention measures in order to detect defects such as thinning and corrosion of the inner and outer wall surfaces of pipes arranged to supply gas, steam, oil, water, etc. to the destination. While running the equipment, the defect of the inner and outer wall surfaces of the pipe is inspected over a wide area from the outer wall surface side of the pipe.

Such non-destructive inspection apparatus of the pipe of the present invention FIG. 1 (A), the arrayed (B), the comprising a measuring device 31 for performing a non-destructive inspection of the pipe 2, in parallel at predetermined intervals A pair of apparatus main body 3 that moves on the pipe by the traveling wheel 32 and a pipe 32 that is disposed along the pipe axis direction of the pipe and that rolls the traveling wheel 32 by fitting the groove 32a of the traveling wheel 32. The pair of guide rails 4A and 4B are arranged in parallel so that the guide rails 4A and 4B and the traveling wheels 32 arranged in parallel at a predetermined interval do not deviate without being removed. When the apparatus main body 3 is placed on the pair of guide rails 4A and 4B via the traveling wheels 32, the apparatus main body 3 is deformed by being loaded with weight, and is in a state along the peripheral wall of the pipe. Press contact with the pipe And a belt 6 having a plurality of flexible being.

  The apparatus main body 3 includes a general traveling mechanism 33 such as screw feed and a motor M that drives the traveling mechanism 33. For example, in FIGS. 1A and 1B, the traveling wheels 32 of the apparatus main body 3 are arranged at the four corners of the apparatus main body 3, respectively, and at least two of them are driven by the traveling mechanism 33, so that a pair of guides It is possible to travel on the rails 4A and 4B in a well-balanced manner. In order to prevent the traveling wheel 32 from slipping on the guide rails 4A and 4B and to suppress vibration during traveling, the groove 32a that contacts the guide rails 4A and 4B is covered with an elastic member such as rubber. It has been broken. The traveling wheel 32 itself may be made of an elastic member.

  The measuring device 31 includes an ultrasonic measurement method in which an ultrasonic sensor is brought into contact with an outer wall surface of a pipe to irradiate ultrasonic waves, and a propagation time of ultrasonic waves reflected from the inner wall surface of the pipe is measured to measure a wall thickness. Estimate the amount of corrosion by preliminarily disposing the radiation source and film or two-dimensional sensor centered on the piping for a preset part, then irradiating with radiation for a predetermined time, measuring and imaging the accumulated radiation dose within the irradiation time The radiation film method or the radiation detection two-dimensional sensor method is used. In the radiation film method or the radiation detection two-dimensional sensor method, the difference between the cumulative radiation dose that passes through the corroded part existing in the piping and the cumulative radiation dose that passes through other parts (normal part, etc.) The amount of corrosion is estimated by using as an index.

  For example, the measuring device 31 to which the radiation detection two-dimensional sensor method is applied includes an X-ray generator 311 installed in the apparatus main body 3 so as to irradiate the X-ray to the pipe 2 and the intensity of the transmitted X-ray transmitted through the pipe 2. Are arranged in a direction orthogonal to the pipe axis direction of the pipe, and the X-ray generator 311 is provided with an array-shaped one-dimensional sensor 312 arranged to face the pipe 2 as a center. ing. Specifically, the array-shaped one-dimensional sensor 312 is held by a sensor holder 314 installed at the tip of a sensor holding bar 313 fixed to the apparatus body 3.

The guide rails 4A and 4B are preferably formed in a cylindrical shape, for example. In this case, the groove of the groove 32a of the traveling wheel 32 is formed in a circular arc shape that fits into a cylindrical guide rail.
Further, as shown in FIG. 2, the guide rails 4A and 4B are provided with an engagement hole 41 at one end, and an engagement projection 42 for insertion into the engagement hole 41 at the other end. By engaging the engagement hole 41 and the engagement protrusion 42, the traveling wheel 32 may be configured to connect the guide rails 4A and 4B so as to be able to roll. That is, by inserting the engaging protrusion 42 into the engaging hole 41 of the guide rail 4A and inserting the engaging protrusion 42 into the engaging hole 41 of the guide rail 4B, the pair of guide rails 4A and 4B are sequentially connected. I can go.

  Further, as shown in FIGS. 1A, 1B, and 2, the guide rails 4A and 4B include a plurality of jig bodies 51 fixed to the installation side of the guide rails 4A and 4B on the pipe, and pipes of the pipes. A rail setting jig 5 is provided that includes a pair of cylindrical bodies 52A and 52B that are arranged along the axial direction and are fixed to the jig body 51 in contact with the circumferential wall of the pipe and spaced apart in the circumferential direction. Good.

  The cylindrical bodies 52A and 52B of the rail setting jig 5 are composed of a metal round pipe 521 and an annular rubber-like elastic body 522 fixed in a state of covering the outer periphery of the metal round pipe 521. Good. As the annular rubber-like elastic body 522, urethane rubber having both the elasticity of synthetic rubber and the rigidity of plastic is suitable. Urethane rubber is suitable for piping such as gas, steam, oil, and water because it has excellent wear resistance, chemical resistance, and oil resistance.

  The belt 6 is detachably held between the jig main body 51 and the cylindrical bodies 52A and 52B. That is, one side of the belt 6 is detachably sandwiched between the jig body 51 and the cylindrical body 52A, and the other side of the belt 6 is detachably sandwiched between the jig body 51 and the cylindrical body 52B. Specifically, as shown in FIG. 3, the jig main body 51 includes a bearing arc in which the cylindrical bodies 52A and 52B are fixed to the base by the first screw, and the guide rails 4A and 4B are fixed to the second screw. The belt 6 is sandwiched between the base of the jig body 51 and the cylindrical bodies 52A and 52B by the tightening force of the second screw.

  At this time, if the cylindrical bodies 52 </ b> A and 52 </ b> B are constituted by the metal round pipe 521 and the annular rubber elastic body 522 as described above, the belt 6 is caused by the frictional force of the annular rubber elastic body 522. Further, it is possible to prevent the positional deviation from between the cylindrical bodies 52A and 52B. In particular, urethane rubber is suitable for exhibiting such a function. In order to prevent the belt 6 from being displaced from between the jig main body 51 and the cylindrical bodies 52A and 52B, the belt 6 is not limited to the screw-engaging means, but the belt 6 is attached to and detached from the jig main body 51 and the cylindrical bodies 52A and 52B. Any mechanical means may be used as long as it can be clamped freely.

  As such a belt 6, for example, a nylon belt that is strong against external pressure such as tension, bending, and friction, has high elasticity, and does not easily wrinkle is used. In FIG. 2, three belts 6 are equally spaced in the laying direction of the guide rails so that the pair of guide rails 4A and 4B are arranged in parallel at equal intervals without the traveling wheels 32 being removed. Is arranged.

The function of the nondestructive inspection apparatus 1 for piping according to the present invention configured as described above will be described below.
First, a pair of guide rails 4 </ b> A and 4 </ b> B are arranged along the pipe axis direction of the pipe 2 on the pipe 2 for performing the nondestructive inspection. At this time, the pair of guide rails 4 </ b> A and 4 </ b> B comes to coincide with the left-right distance of the traveling wheel 32 provided in the apparatus main body 3.

  Next, when the apparatus main body 3 is placed on the pair of guide rails 4A and 4B via the traveling wheels 32, a plurality of flexible belts are arranged so that the pair of guide rails 4A and 4B are arranged in parallel at equal intervals. 6, the weight of the apparatus main body 3 is applied to the plurality of flexible belts 6 through the pair of guide rails 4 </ b> A and 4 </ b> B, and the weight of the apparatus main body 3 is applied to the belt 6. Is deformed and pressed against the pipe 2 in a state along the peripheral wall of the pipe 2, so that the pair of guide rails 4 </ b> A and 4 </ b> B can be stably laid on the pipe 2. As a result, the pair of guide rails 4A and 4B need not be secured to the pipe 2 by the belt 6.

  Therefore, even in other pipes, the pair of guide rails 4A and 4B can be laid in a stable state without being tied to the pipe with a belt, so that the apparatus main body 3 is reliably reciprocated on the pipe 2. And can be easily used for other pipes.

  Further, if the pair of guide rails 4A and 4B includes the jig body 51 and the rail set jig 5 including the pair of cylindrical bodies 52A and 52B, the two cylindrical bodies 52A and 52B of the rail set jig 5 are respectively provided. Since the line contact is made along the pipe axis direction of the pipe 2, it can be installed in a stable state even if the pipe diameter size of the cylindrical pipe 2 changes.

  Further, if the cylindrical bodies 52A and 52B are composed of a metal round pipe 521 and an annular rubber elastic body 522, the contact portions of the cylindrical bodies 52A and 52B used for the rail setting jig 5 are rubber elastic. The guide rails 4A and 4B can be set without damaging the pipe 2, and the guide rails 4A and 4B can be stably placed at predetermined positions on the pipe 2 by using rubber having a high friction coefficient. Can be installed.

  Further, the guide rails 4A and 4B are provided with an engagement hole 41 at one end and an engagement protrusion 42 for insertion into the engagement hole 41 at the other end. The travel distance of the apparatus main body 3 can be extended by connecting the curved guide rail even if the pipe 2 is provided with a curve.

  Further, if the belt 6 is detachably held between the jig main body 51 and the cylindrical bodies 52A and 52B, the position of the belt 6 fixed to the rail setting jig 5 can be adjusted. The distance between the pair of guide rails 4A and 4B can be maintained according to the size of the guide rail.

  If the guide rails 4A and 4B are formed in a cylindrical shape, and the groove of the groove 32a of the traveling wheel 32 is formed in a circular arc shape that fits into the cylindrical guide rails 4A and 4B, the width direction of the pipe 2 Even if the size of the guide rail changes and the guide rail moves in the circumferential direction of the pipe 2, the traveling wheel 32 can be fitted to the guide rail in a stable state. Therefore, the shape of the pipe 2 to which the pipe nondestructive inspection apparatus 1 of the present invention is applied is not limited to the cylindrical pipe.

  Although the present invention has been described with the specific embodiments shown in the drawings, the present invention is not limited to the embodiments shown in the drawings, and is known so far as long as the effects of the present invention are achieved. It goes without saying that any configuration can be adopted.

1 ...... nondestructive inspection device 2 ...... pipe 3 ...... apparatus main body 31 ...... measuring device 32 ...... running wheels 32a ...... grooves 4A, 4B ...... pair of guide rails 41 ...... engagement hole 42 ...... engagement Projection 5 …… Jig for rail set 51 …… Jig body 52A, 52B …… A pair of cylindrical bodies 6 …… Belt 60 …… Belt part 61 …… Buckle

Claims (6)

Comprising a measuring device for performing non-destructive inspection of the pipe, the device body moving on the pipe by the traveling wheels which are arranged in parallel at predetermined intervals,
A pair of guide rails arranged along the pipe axis direction of the pipe and rolling the traveling wheel by fitting the groove of the traveling wheel;
The pair of guide rails are connected so that the pair of guide rails are arranged in parallel at equal intervals without the traveling wheels arranged in parallel at the predetermined interval, and the apparatus main body is the traveling wheel. When the belt is placed on the pair of guide rails via the belt, the weight of the apparatus main body is increased, and the belt is deformed and pressed against the pipe in a state along the peripheral wall of the pipe. And a non-destructive inspection device for piping.   The guide rail has an engagement hole at one end, an engagement protrusion for insertion into the engagement hole at the other end, and engages the engagement hole with the engagement protrusion. The nondestructive inspection device for piping according to claim 1, wherein the guide wheels are connected to each other so that the traveling wheels can roll.   The pipe according to claim 1 or 2, wherein the guide rail is formed in a cylindrical shape, and the groove of the traveling wheel is formed in a circular arc shape that fits into the cylindrical guide rail. Non-destructive inspection equipment. A plurality of jig bodies fixed to the installation side of the guide rail to the pipe;
A rail set jig comprising a pair of cylindrical bodies arranged along the pipe axis direction of the pipe and fixed to the jig body in contact with the peripheral wall of the pipe and spaced apart in the circumferential direction. The nondestructive inspection device for piping according to any one of claims 1 to 3, wherein the piping nondestructive inspection device is provided.   The pipe according to claim 4, wherein the cylindrical body includes a metal round pipe and an annular rubber-like elastic body fixed in a state of covering an outer periphery of the metal round pipe. Nondestructive inspection equipment.   6. The nondestructive inspection apparatus for piping according to claim 4, wherein the belt is detachably sandwiched between the jig body and the cylindrical body.

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