JP2015129656A - Travel type measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a travel type measuring apparatus comprising a traveling measuring part where an examiner can easily manually perform measurement related to an object to be measured while causing the measuring apparatus to travel on a surface of the object to be measured.SOLUTION: A travel type measuring apparatus 1 comprises a traveling measuring part 3 comprising: a plurality of wheels 12; a partial immersion testing probe 13; a magnet 14 for adsorbing on a surface of piping 2; a magnet holding part 27 for holding the magnet 14 movably in a separating direction relative to the surface in an attitude where an adsorption face 16 of the magnet 14 faces the surface; and a coil spring 41 for pushing the wheels 12 to the surface. The adsorption face 16 of the magnet 14 comprises a coating 17 for reducing friction force.

Description

  The present invention relates to a traveling type measuring apparatus that performs measurement related to a measured object by a traveling measurement unit that travels on the surface of the measured object that can be attracted by a magnet.

  Conventionally, as such a traveling type measuring device, the thickness of an iron structure such as a pipe is measured by an ultrasonic thickness gauge while adsorbing to the iron structure such as a pipe by a magnet wheel and traveling on the inner surface. There is known a magnet cart that performs such a process (see, for example, Patent Document 1). The magnet carriage is arranged on the inner surface of the opening of an iron structure such as a pipe in the axial direction of the hydraulic iron pipe, and moves to the measurement position by driving the magnet wheel with a motor.

  The magnet carriage that has reached the measurement position turns so as to face the circumferential direction of the pipe or the like by driving only the magnet wheel on one side in the left-right direction. Furthermore, by driving the magnet wheels on both sides, the tube thickness is measured with an ultrasonic thickness gauge while traveling in the circumferential direction.

  Further, as a similar traveling type measuring device, a vehicle body having a sensor device for inspecting a steel pipe, a crawler wound around a driving wheel and a driven wheel, a magnet disposed on the lower inner surface side of the crawler, a driving wheel and a slave There is also known an inspection apparatus including a movable mechanism that can move a moving wheel up and down separately from each other (see, for example, Patent Document 2).

  This inspection device also runs along the axial direction of the steel pipe until it reaches the inspection target area of the steel pipe, and after reaching the inspection target area, it moves in the circumferential direction of the steel pipe along the inspection target area. Inspection can be performed automatically. During this time, the inspection apparatus is moved by the crawler while being attracted to the steel pipe surface by the magnet via the crawler. Further, the vertical movement of the driving wheel and the driven wheel can cope with a change in the outer diameter of the steel pipe.

Japanese Patent No. 3822149 JP 2006-17480 A

  However, according to the magnet cart of the above-mentioned patent document 1, since the measurement is performed in the circumferential direction while being attracted to the steel pipe by the magnet wheel, it is necessary to use a heavy magnet wheel having a strong attraction force. For this reason, since this magnet trolley becomes heavy, it is not suitable for a steel pipe inspector to run manually.

  Moreover, according to the inspection apparatus of Patent Document 2, since the magnet is attracted to the steel pipe surface via the crawler, the attracting force is weaker than when the magnet is directly attracted to the steel pipe surface. Therefore, it is necessary to use a large and heavy magnet in order to obtain a sufficient attractive force. Therefore, the weight of the device is also increased in this case.

  An object of the present invention is to provide a traveling type measuring apparatus provided with a traveling measurement unit that allows an inspector to easily perform measurement related to a measured object while manually traveling the surface of the measured object in view of the problems of the related art. It is to provide.

  A traveling type measuring apparatus according to the present invention is a traveling type measuring apparatus that performs measurement related to a measured object by a traveling measurement unit that travels on the surface of the measured object made of a material to which a magnet adsorbs. A plurality of wheels for traveling on the surface of the object to be measured, a measuring instrument for performing measurement relating to the object to be measured, a magnet having an attracting surface that is attracted to the surface of the object to be measured, and the traveling measuring unit. A magnet holding unit for holding the magnet so as to be movable toward and away from the surface so that the magnet is maintained in the state of being attracted to the surface when traveling on the surface of the measurement object; And an elastic member that presses the wheel against the surface of the object to be measured, and the magnet adsorption surface is provided with a coating that reduces the frictional force with the surface of the object to be measured. It is characterized by.

  According to the present invention, when the measurement related to the measurement object is performed, the traveling measurement unit is arranged on the surface of the measurement object and the wheel is in contact with the surface. At this time, the magnet is attracted to the surface of the measurement object. Along with this, the elastic member presses the wheel against the surface of the object to be measured. As a result, the traveling measurement unit can travel on the surface of the object to be measured while adsorbing the surface of the object to be measured flexibly through the elastic member, regardless of some unevenness of the surface.

  In this state, the attracting surface of the magnet is attracted to the surface of the measurement object via the coating that reduces the frictional force, so when the travel measurement unit is pushed along the surface of the measurement object, the travel measurement unit is It starts running on the surface of the object against the frictional force. While the traveling measurement unit is traveling, measurement on the measurement object is performed by the measuring instrument.

  During this time, the magnet is held by the magnet holding part so as to be movable in the contact / separation direction with respect to the surface of the object to be measured, so that it can move in the contact / separation direction against the urging force of the elastic member. Therefore, the attracting surface of the magnet is always in close contact with the surface of the measurement object regardless of the unevenness of the surface of the measurement object. Thereby, the adsorption | suction to the measurement object by a magnet is maintained favorably. Therefore, the travel measurement unit can always travel with the wheel in close contact with the surface of the measurement object.

  Moreover, in addition to being able to comprise a magnet with a light material, since it can be made to drive | work easily by pushing a driving | running | working measurement part, the motor which drives a wheel is unnecessary. Thereby, since the traveling measurement unit is configured to be lightweight, the inspector can easily measure the measurement object while manually traveling the traveling measurement unit on the surface of the measurement object.

  In the present invention, the magnet holding unit may hold the magnet such that the attracting surface is tiltable with respect to the left-right direction and the front-rear direction of the travel measurement unit.

  According to this, when performing measurement related to piping, for example, as a measurement object, the magnet attracting surface can always be in close contact with the surface of the piping regardless of the measurement direction. Thereby, it is possible to perform measurement while maintaining the attractive force of the magnet with respect to the measurement object.

  In the present invention, the magnet holding unit includes a rotating shaft that supports the magnet so that the attracting surface is rotatable about a central axis included in a surface perpendicular to the vertical direction of the travel measuring unit, and the rotating shaft The posture may be configured by a switching mechanism for switching between a first posture in which the length direction of the rotation shaft coincides with the left-right direction and a second posture in which the length direction coincides with the front-rear direction.

  According to this, when measuring a pipe as a measurement object, for example, along the circumferential direction of the pipe, the measurement is performed by setting the attitude of the rotary shaft to the first attitude and measuring along the length direction. In this case, the measurement can be performed by setting the second posture. Thereby, even when measuring along any direction, the attracting surface of the magnet can be brought into close contact with the surface of the pipe. Therefore, it is possible to perform measurement while maintaining the magnet's attractive force with respect to the pipe.

  In the present invention, a rope for pulling and traveling the travel measurement unit is provided, and when the measurement object is cylindrical, the travel measurement unit is traveled on a surface along the outer periphery of the measurement object. The rope may be arranged along the outer periphery of the object to be measured, with one end fixed to the front end of the travel measurement unit and the other end fixed to the rear end of the travel measurement unit. Good.

  According to this, by moving the rope along the circumferential direction of the measurement object, it is possible to perform measurement related to the measurement object while traveling the traveling measurement unit along the circumferential direction.

  In the present invention, the apparatus includes a plurality of hard pipes into which the rope is inserted, and the rope is inserted into the plurality of hard pipes when the rope is disposed along an outer periphery of the measurement object. It may be arranged on an object.

  According to this, the rope does not directly contact the measurement object, and is disposed on the measurement object via the hard tube. Therefore, the frictional force when moving the rope along the circumferential direction of the measurement object can be reduced by the hard tube.

  In the present invention, when the rope is arranged along the outer periphery of the object to be measured, it is used in the travel measurement unit as a counterweight for the travel measurement unit located on a portion of the rope opposite to the travel measurement unit. The battery which supplies the electric power used, or the tank which stores the liquid used with the said travel measurement part may be provided.

  According to this, the weight of the travel measurement unit when the travel measurement unit travels on both sides of the measurement object is offset by the counter weight by the counter weight. Therefore, the inspector can perform measurement related to the measurement object with less labor. Further, since the counterweight is composed of a battery or a water tank, the counterweight can be configured without increasing the weight of the entire traveling type measuring apparatus.

It is a schematic diagram which shows the structure of the traveling type measuring apparatus which concerns on one Embodiment of this invention. (A) is a front view of the traveling measurement part in the traveling type measuring apparatus of FIG. 1, (b) is a plan view, and (c) is a left side view. (A) is a front view of the part of the magnet attachment part in the traveling type measuring apparatus of FIG. 1, (b) is sectional drawing of the part of the magnet holding | maintenance part. It is a front view in the state different from Fig.3 (a) of the part of the magnet attaching part of FIG. It is sectional drawing which shows the mode of a magnet attachment part when measuring along the length direction of piping. It is a schematic diagram which shows a mode that it measures along the circumferential direction of piping with the traveling type measuring apparatus which concerns on another embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a travel type measuring apparatus 1 according to an embodiment of the present invention includes a travel measurement unit 3 that travels on the surface of a pipe 2 as a measurement object made of a material adsorbed by a magnet, and travel measurement. And a personal computer 4 for processing the measurement data from the unit 3. The travel measurement unit 3 measures the pipe thickness of the pipe 2 through the cleaned surface while cleaning the surface of the pipe 2.

  Electric power required in each part of the traveling type measuring apparatus 1 is supplied from the engine generator 5 via the power supply unit 6. The cleaning water required by the travel measurement unit 3 is supplied from a water tank 7 with a pump.

  The personal computer 4 or the water tank 7 and the travel measurement unit 3 are connected by a composite cable 8. The composite cable 8 includes a power cable from the power supply unit 6, a USB cable and a coaxial cable from the personal computer 4, a water hose from the water tank 7, and the like.

  The inspector who inspects the pipe thickness of the pipe 2 uses the joystick controller 9 to turn on / off the rotation of the brush for cleaning the surface of the pipe 2, and to record and measure the measured value when the travel measuring unit 3 reaches the measurement position. It is possible to instruct the personal computer 4 to reset the position.

  Moreover, the traveling type measuring apparatus 1 includes a rope 10 for pulling and traveling the traveling measurement unit 3. When the travel measuring unit 3 is traveled on the surface along the outer periphery of the pipe 2, the rope 10 is disposed along the outer periphery of the pipe 2.

  FIG. 1 shows the situation at this time. One end of the rope 10 is fixed to the front end of the travel measurement unit 3, and the other end is fixed to the rear end of the travel measurement unit 3. Hereinafter, unless otherwise specified, “front”, “rear”, “left”, “right”, “upper”, and “lower” indicate directions with reference to the travel measurement unit 3.

  As shown in FIG. 2, the traveling measurement unit 3 includes a frame 11 that supports each unit, and four traveling wheels 12 that are rotatably provided at the four corners of the frame 11. The front end portion of the frame 11 is provided with a front fastening portion 11a for connecting and fixing one end of the rope 10 (see FIG. 1), and the other end of the rope 10 is connected and fixed to the rear end portion. A rear fastening portion 11b is provided. Both the front fastening portion 11 a and the rear fastening portion 11 b are provided so as to be rotatable with respect to the frame 11 in accordance with the traction force from the rope 10.

  The travel measurement unit 3 includes a local water immersion probe 13 fixed to the frame 11, four magnets 14 for attracting the travel measurement unit 3 to the surface of the pipe 2, and these magnets 14 attached to the frame 11. And two left and right magnet mounting portions 15 for mounting two on each of the left and right sides.

  The local water immersion probe 13 fills the space between the probe and the measurement object with water, makes an ultrasonic pulse incident on the measurement object from the probe, and receives the echo waveform of the measurement object. It is a measuring instrument for measuring tube thickness and the like. Water for measurement is supplied from the water tank 7 through the water hose of the composite cable 8.

  As the magnet 14, a neodymium magnet having a flat attracting surface 16, for example, a square one is used. In this case, a large adsorption force can be obtained with a relatively small weight. The suction surface 16 is provided with a coating 17 that reduces the frictional force when the suction surface 16 slides on the surface of the pipe 2. As the material of the coating 17, for example, industrial tape or polytetrafluoroethylene based on ultra high molecular weight polyethylene is used.

  The attractive force of the magnet 14 with respect to the pipe 2 in a state where the coating 17 is provided on the attracting surface 16 is, for example, 7.5 to 8 [kg] per magnet 14, and 30 to 32 [kg] with four. ]. In this case, the frictional force acting when the magnet 14 slides on the surface of the pipe 2 is about 2.2 [kg] per magnet 14, and about 9 [kg] for four.

  However, since the attracting force of the magnet 14 is alleviated to some extent by a coil spring 41 described later, the frictional force is also alleviated to some extent. In this case, the running measurement unit 3 has a weight of about 10 [kg]. Therefore, the attractive force of the magnet 14 is sufficiently large relative to its own weight. The reason why the attracting force of the magnet 14 is sufficiently strong is to provide a margin so that it can be handled or adjusted even if the painting or lining thickness of the pipe 2 is changed or its own weight is changed.

  Further, as shown in FIG. 2 (c), the travel measurement unit 3 is a cleaning rotary brush that is rotatably supported by a rotation shaft extending in the left-right direction on the front side of the local water immersion probe 13. 18 is provided. The rotating brush 18 is rotated by a brush motor 19 via a pulley and a belt. Water for cleaning by the rotating brush 18 is supplied from the water tank 7 through the water hose of the composite cable 8.

  The rotating brush 18 cleans the portion of the pipe 2 in front of the local water immersion probe 13 prior to measurement by the local water immersion probe 13. As a result, dust and the like in the measurement part are removed in advance, so that the measurement by the local water immersion probe 13 is accurately performed.

  As shown in FIG. 3, the left and right magnet attachment portions 15 include an attachment panel 20 that is attached so that the inner surface is in contact with the outer surface of the frame 11 and the position in the vertical direction can be changed. The vertical position of the mounting panel 20 is changed by rotating the bolt 21 to move the mounting panel 20 up and down and fixing the mounting panel 20 to the frame 11 with the wing nut 22.

  In order to realize this, the mounting panel 20 is provided with a female screw member 23 in which a female screw into which the bolt 21 is screwed in the vertical direction is formed. The frame 11 is provided with a bolt holding member 24 that holds the upper end portion of the bolt 21 so as to be rotatable around the central axis while restricting movement in the vertical direction. Thereby, the attachment panel 20 can be moved up and down with respect to the frame 11 by rotating the bolt 21.

  The mounting panel 20 is provided with a guide hole 25 extending in the vertical direction. The frame 11 is provided with a male screw 26 that protrudes from the outer surface of the mounting panel 20 through the guide hole 25. The wing nut 22 is screwed onto the male screw 26 from the outer surface side of the mounting panel 20. Therefore, by operating the wing nut 22, the mounting panel 20 can be fixed to the frame 11 and the fixing can be released.

  In this way, the mounting panel 20 can be moved up and down to an arbitrary position by the bolt 21 and fixed to the frame 11 by the wing nut 22. FIG. 3A shows a state in which the mounting panel 20 is fixed to the uppermost position with respect to the frame 11. FIG. 4 shows a state in which the mounting panel 20 is fixed at the lowest position with respect to the frame 11.

  A magnet holding portion 27 for holding the magnet 14 is provided on the outer surface of the front end portion and the rear end portion of the mounting panel 20. Each magnet holding unit 27 is in contact with and away from the surface so that the attracting surface 16 of the magnet 14 is attracted to the surface when the traveling measurement unit 3 is traveling on the surface of the pipe 2. The magnet 14 is held so that it can move freely. The magnet 14 is held so that the attracting surface 16 can be tilted with respect to the left-right direction and the front-rear direction. The magnet holding unit 27 is configured as follows.

  That is, the magnet holder 27 is provided with a movable rod 28 that is held so as to be movable in the vertical direction. The movable rod 28 is guided in the vertical direction by two guide members 29 fixed on the outer surface of the mounting panel 20 so as to be separated in the vertical direction. Each guide member 29 is provided with a through-hole 29a penetrating in the vertical direction. The movable rod 28 is passed through each through hole 29a and guided in the vertical direction.

  A male screw 30 extending in the vertical direction is formed at the upper end of the movable rod 28. The male screw 30 is passed through the through hole 31 a of the position adjusting member 31 fixed to the mounting panel 20. Nuts 32 are respectively screwed into the male screws 30 at portions extending upward and downward from the position adjusting member 31. Each nut 32 defines a movable range of the movable rod 28 in the vertical direction with respect to the mounting panel 20.

  Further, the magnet holding portion 27 includes a rotary shaft 33 that supports the magnet 14 so as to be rotatable around a central axis included in a plane perpendicular to the vertical direction, and the posture of the rotary shaft 33 is set to the length of the rotary shaft 33. A switching mechanism is provided for switching between a first posture whose direction matches the left-right direction and a second posture that matches the front-rear direction.

  The rotating shaft 33 is provided at the lower end portion of the movable rod 28 and supports the magnet 14 with its own weight so that the attracting surface 16 faces downward. The switching mechanism includes a first surface 34 and a second surface 35 which are provided on the movable rod 28 and are perpendicular to each other along the vertical direction, and the movable rod 28 in cooperation with the first surface 34 and the second surface 35. It comprises a rod fixing member 36 and a butterfly bolt 37 for fixing the position around the axis.

  The rod fixing member 36 is provided with a through hole 36a into which the movable rod 28 is inserted, and a screw hole 36b that penetrates the through hole 36a from the outside in the left-right direction. A butterfly bolt 37 is screwed into the screw hole 36b. The first surface 34 is perpendicular to the rotation axis 33, and the second surface 35 is parallel to the rotation axis 33.

  The positional relationship in the vertical direction between the movable rod 28 and the rod fixing member 36 is regulated so that the vertical position between the first surface 34 and the second surface 35 and the through hole 36a corresponds. This restriction is performed by a restriction member 39 fixed to the upper and lower positions of the rod fixing member 36 in the movable rod 28.

  The rod fixing member 36 is long in the left-right direction, and an end portion on the inner side in the left-right direction is guided in the vertical direction by a slit hole 40 provided in the mounting panel 20 in the vertical direction. For this reason, the rod fixing member 36 does not rotate around the movable rod 28.

  Therefore, as shown in FIG. 3B, the movable rod 28 is rotated so that the length direction of the rotation shaft 33 coincides with the left-right direction, and the butterfly bolt 37 is tightened, whereby the butterfly bolt 37 and the first surface 34 are And the posture of the rotating shaft 33 can be switched to the first posture. In addition, as shown in FIG. 5, the movable rod 28 is rotated so that the length direction of the rotary shaft 33 coincides with the front-rear direction, and the butterfly bolt 37 is tightened, so that the posture of the rotary shaft 33 is changed to the second posture described above. Can be switched.

  A coil spring 41 as an elastic member is disposed between the rod fixing member 36 and the lower guide member 29 in the movable rod 28. The coil spring 41 presses the wheel 12 against the surface via the frame 11 in a state where the attracting surface 16 of the magnet 14 is attracted to the surface of the pipe 2.

  Note that the measurement position when the pipe thickness of the pipe 2 is measured by the travel measuring unit 3 is determined by detecting the rotation angle of the wheel 43 pressed against the surface of the pipe 2 by the encoder 42 at the lower part of the frame 11. (See FIG. 2 (b)). Further, the control of the brush motor 19, the local water immersion probe 13, the encoder 42, etc., and the exchange of information with the personal computer 4 are performed by the control unit 45 provided on the upper rear end side of the frame 11.

  In this configuration, when measuring the pipe thickness of the pipe 2, first, the vertical position of the magnet mounting portion 15 is adjusted by the bolt 21 and the wing nut 22. In this adjustment, when the travel measurement unit 3 is arranged in the measurement direction with respect to the surface of the pipe 2, the attracting surface 16 of the magnet 14 is attracted to the surface of the pipe 2, and the coil spring 41 is connected to the travel measurement unit 3. This is performed so that the wheel 12 is pressed against the surface.

  The horizontal position of the magnet 14 and the wheel 12 in the travel measurement unit 3 is substantially the same. For this reason, when the measurement is performed while the travel measurement unit 3 travels along the length direction of the pipe 2, the position adjustment of the magnet attachment unit 15 is performed before the travel measurement unit 3 is arranged on the pipe 2. It is performed so that the attracting surface 16 of the magnet 14 is located slightly above the lower end of the wheel 12 (in a state where the attracting force of the magnet 14 does not act).

  On the other hand, the magnet 14 is located inside the wheel 12 in the front-rear direction of the travel measurement unit 3. For this reason, when the measurement is performed while the travel measurement unit 3 travels along the circumferential direction of the pipe 2, the travel measurement unit 3 is placed on the pipe 2 (the state in which the attracting force of the magnet 14 does not act). Thus, the attracting surface 16 of the magnet 14 is adjusted so as to be positioned considerably above the lower end of the wheel 12. In this case, as the diameter of the pipe 2 is smaller, the magnet 14 is adjusted to be positioned higher.

  That is, even when measuring along the length direction or the circumferential direction of the pipe 2, when the magnet 14 assumes that the attracting force is not acting when the wheel 12 is in contact with the pipe 2. In addition, it is adjusted so as to be located away from the pipe 2 with a certain gap.

  The state when adjusted in this way is shown in FIG. 2A for the case where measurement is performed along the circumferential direction of the pipe 2. FIG. 2C shows a case where measurement is performed along the length direction of the pipe 2. However, in any case, the case where it is assumed that the attracting force of the magnet 14 is not acting is shown.

  Moreover, when measuring along the length direction of the piping 2, the rotating shaft 33 of the magnet holding part 27 becomes parallel to the front-back direction by operating the butterfly bolt 37 and rotating the movable rod 28. The second posture is set. In FIG. 5, the state of the magnet attachment portion 15 when it is set as described above and measurement is performed along the length direction of the pipe 2 is shown.

  Moreover, when measuring along the circumferential direction of the piping 2, the rotating shaft 33 of the magnet holding | maintenance part 27 is set to said 1st attitude | position which becomes parallel to the left-right direction. In FIG. 3, the state of the magnet attachment part 15 when set in this way is shown. However, FIG. 3 shows a case where it is assumed that the attracting force of the magnet 14 is not acting.

  After the adjustment of the vertical position of the magnet mounting portion 15 and the setting of the posture of the rotating shaft 33 of the magnet holding portion 27 are performed in this way, the travel measurement unit 3 measures the pipe thickness of the pipe 2. The wheel 12 is disposed on the pipe 2 in a posture corresponding to the measurement direction. At this time, each magnet 14 is attracted to the pipe 2 against the biasing force of the corresponding coil spring 41. Thereby, the wheel 12 of the traveling measurement unit 3 is pressed against the surface of the pipe 2 by the coil spring 41 through the frame 11.

  At this time, the attracting force of the magnet 14 on the pipe 2 is canceled by the amount of the biasing force of the coil spring 41. However, as described above, for example, the attracting force of the four magnets 14 on the pipe 2 is 30 to 32 [kg], and the running measurement unit 3 has a weight of about 10 [kg]. Therefore, by appropriately setting the biasing force of the coil spring 41, the wheel 12 of the travel measurement unit 3 can be pressed against the surface of the pipe 2 with a sufficient force by the attractive force of the magnet 14.

  That is, in this example, when the urging force by the four coil springs 41 is F [kg], the travel measurement is performed by setting the value of F so that (30 to 32) −10> F> 10. The part 3 itself can be adsorbed directly below the horizontal pipe 2 with the wheel 12 in contact with the pipe 2 and without falling.

  The inspector who measures the pipe thickness of the pipe 2 manually places the travel measuring unit 3 on the surface of the pipe 2 when the pipe 2 is arranged at a low position, and the length direction or circumferential direction of the pipe 2 The pipe thickness of the pipe 2 can be measured while pushing forward.

  At this time, the travel measuring unit 3 is attracted to the pipe 2 with a certain amount of force by the magnet 14 as described above, and the frictional force between the magnet 14 and the surface of the pipe 2 is It is reduced by the coating 17 of the suction surface 16. For this reason, the inspector can travel on the pipe 2 while easily holding the travel measurement unit 3 by hand.

  At the time of measurement, cleaning water and water for the local water immersion probe 13 are supplied from the water tank 7 to the traveling measurement unit 3. Then, while rotating the rotary brush 18, the pipe thickness of the cleaned pipe 2 is measured by the local water immersion probe 13. During this time, based on the position information recognized by the encoder 42, measurement data at a predetermined measurement position is taken from the local water immersion probe 13 by the control unit 45 and transmitted to the personal computer 4.

  Acquisition of measurement data can be instructed by the inspector via the personal computer 4 by the joystick controller 9. At that time, the inspector can give an instruction while monitoring the position information sent from the control unit 45 to the joystick controller 9 via the personal computer 4 based on the output signal from the encoder 42. In addition, the inspector can reset the origin as a reference of the position information by using the joystick controller 9 or turn the rotation of the rotary brush 18 on and off.

  On the other hand, when the inspector performs measurement along the circumferential direction of the pipe 2 having a large diameter that cannot be measured while holding the traveling measurement unit 3 or the pipe 2 arranged at a high place, As shown in FIG. 1, a rope 10 is used. The rope 10 is disposed along the outer periphery of the pipe 2, one end is fixed to the front fastening portion 11 a of the travel measurement unit 3, and the other end is fixed to the rear fastening portion 11 b.

  The inspector moves the rope 10 along the circumferential direction of the pipe 2 so that the travel measuring unit 3 adsorbed on the pipe 2 as described above travels along the circumferential direction of the pipe 2 while piping. Two tube thicknesses can be measured.

  In this case, when traveling so as to traverse the upper and lower portions of the horizontally disposed pipe 2 in the circumferential direction, assuming that the biasing force by the coil spring 41 does not act, the four magnets 14 and the pipe 2 It is necessary to move the rope 10 with a force comparable to the frictional force with the surface, for example, 9 [kg].

  Further, when the travel measuring unit 3 is traveled so as to cross both sides of the pipe 2 in the circumferential direction, one side that travels from the upper side to the lower side has a frictional force of 9 [kg] to its own weight, for example, 10 [ It is necessary to move the rope 10 with a force obtained by subtracting [kg] (−1 [kg]). Further, on the other side portion that travels from below to above, it is necessary to move the rope 10 with a force (19 [kg]) obtained by adding the own weight 10 [kg] to the friction force 9 [kg].

  However, as described above, the frictional force due to the attractive force of the magnet 14 is alleviated to some extent by the biasing force of the coil spring 41. When the travel measuring unit 3 is actually traveled so as to cross the upper and lower portions of the pipe 2, in the case of the above example, for example, a force of about 2 to 3 kg is sufficient for the frictional force and the weight. .

  Moreover, when making it run so that the side part of the piping 2 may be crossed from the top to the bottom, for example, a force of about −3.5 to −4 [kg] is applied (the upward direction is 3.5 to 4 [kg]. ] Is sufficient. When traveling so that the side portion of the pipe 2 crosses from the bottom to the top, for example, a force of about 3.5 to 4 [kg] may be applied.

  While the measurement is performed in this way, the magnet 14 can move up and down within a range defined by the nut 32 at the upper end of the movable rod 28, so that the coil 14 can be coiled regardless of some irregularities on the surface of the pipe 2. The state of being always adsorbed on the surface can be maintained against the urging force of the spring 41.

  When the pipe thickness of the pipe 2 provided vertically is measured along the length direction, the travel measuring unit 3 is pulled by the rope 10 from above while being adsorbed to the pipe 2, thereby increasing the length. It can be made to travel along the measurement path in the vertical direction. The measurement of the inclined pipe 2 can be performed in the same manner. In addition, the pipe 2 inclined to some extent can be measured by arranging the rope 10 along the circumferential direction and pulling the traveling measurement unit 3 in the circumferential direction, as described above.

  As described above, according to the present embodiment, the magnet 14 is attracted to the pipe 2, and the travel measuring unit 3 is pressed against the pipe 2 by the coil spring 41 based on the attracting force (adsorption). By running on the pipe 2, the pipe thickness of the pipe 2 can be measured. Therefore, it is possible to reduce the labor of the inspector when performing measurement while holding the traveling measurement unit 3 and traveling.

  In addition, since the magnet 14 is held by the magnet holding unit 27 so that the attracting surface 16 can be tilted with respect to the left and right direction and the front and rear direction of the travel measurement unit 3, the pipe 2 is arranged in the length direction and When measuring along the circumferential direction, the adsorption surface 16 can be brought into close contact with the surface of the pipe 2. Thereby, it is possible to perform measurement while maintaining the attractive force by the magnet 14 in a good manner.

  Moreover, since the magnet holding part 27 is comprised with the rotating shaft 33 which supports the magnet 14 rotatably, and the switching mechanism which switches the attitude | position of the rotating shaft 33, the magnet holding part 27 can be comprised easily.

  Moreover, since the travel measurement unit 3 is caused to travel along the outer periphery of the pipe 2 by the rope 10, the measurement along the outer periphery of the pipe 2 having a large diameter or the pipe 2 disposed at a high place is easily performed. be able to.

  FIG. 6 shows a state in which the pipe thickness of the pipe 2 is measured by a traveling type measuring apparatus according to another embodiment of the present invention. As shown in FIG. 6, this traveling type measuring apparatus includes a traveling measuring unit 3 and a rope 10 similar to the traveling type measuring apparatus 1 of FIG.

  However, the traveling type measuring apparatus of the present embodiment is provided with a plurality of hard tubes 46 into which the rope 10 is inserted, and when the rope 10 is disposed along the outer periphery of the pipe 2, the traveling measurement unit 3 of the rope 10. 1 is different from the traveling type measuring apparatus 1 in FIG.

  The rope 10 is composed of two ropes 10a and 10b arranged between one and the other of the counterweight 47 and the travel measuring unit 3, respectively. The hard pipe 46 is used to reduce the frictional force acting between the rope 10 and the pipe 2. As the hard tube 46, for example, a tube made of polyvinyl chloride is used.

  The counterweight 47 is configured by fixing a battery 49 that supplies power to the travel measurement unit 3 to a carriage 48 having wheels at four corners. The counterweight 47 may be configured using a tank for supplying water to the travel measurement unit 3 instead of or in addition to the battery 49.

  In the case of this embodiment, when measuring the pipe thickness along the outer periphery of the pipe 2, the ropes 10a and 10b are respectively connected to, for example, three hard pipes 46 arranged in series as shown in FIG. Inserted. One end of the rope 10 a is connected to the front fastening portion 11 a of the traveling measurement unit 3, and the other end is connected to the rear end of the counterweight 47. Further, one end of the rope 10 b is connected to the front end of the counterweight 47, and the other end is connected to the rear fastening portion 11 b of the travel measurement unit 3.

  According to the present embodiment, as in the case of the above-described embodiment of FIG. 1, the traveling measurement unit 3 is caused to travel along the circumferential direction by moving the rope 10 along the circumferential direction of the pipe 2. The pipe thickness of the pipe 2 can be measured. At this time, the rope 10 is not in direct contact with the pipe 2 but is in contact with the hard pipe 46, so that the friction between the rope 10 and the pipe 2 is caused by the hard pipe 46 rather than in the embodiment of FIG. 1. Power can be reduced.

  In addition, the weight of the travel measurement unit 3 when the travel measurement unit 3 travels across both sides of the pipe 2 is offset by the counterweight 47 by the weight of the counterweight 47. Therefore, the inspector can measure the pipe thickness of the pipe 2 with less labor than in the embodiment of FIG. Further, since the counterweight 47 is configured by the battery 49 and the water tank, the counterweight 47 can be configured without increasing the weight of the entire traveling type measuring apparatus.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this. For example, the measurement content by the traveling type measuring apparatus is not limited to the pipe thickness of the pipe but may be a measurement related to the thickness of the pipe coating or the appearance of the pipe using a camera.

  Moreover, it replaces with the hard pipe 46 in which the rope 10 in the case of measuring the pipe thickness of the piping 2 along the circumferential direction is replaced with a plurality of wheels that support the rope 10 so as not to contact the surface of the pipe 2. The caster may be used.

  Further, the magnet holding unit 27 may be the above-described rotating shaft 33 as long as the magnet 14 is held so that the attracting surface 16 can tilt with respect to the left and right direction and the front and rear direction of the travel measurement unit 3. And a switching mechanism need not be configured. For example, you may comprise the magnet holding | maintenance part which hold | maintains the magnet 14 so that inclination is possible using a universal joint. Moreover, the traveling type measuring apparatus 1 may include a motor that drives the wheels 12 and be capable of self-propelling.

DESCRIPTION OF SYMBOLS 1 ... Traveling type measuring device, 2 ... Pipe (measurement object), 3 ... Traveling measurement part, 10 ... Rope, 11 ... Frame, 12 ... Wheel, 13 ... Local water immersion probe (measuring instrument), 14 ... Magnet , 16 ... attracting surface, 17 ... covering, 21 ... butterfly bolt (switching mechanism), 27 ... magnet holder, 33 ... rotating shaft, 34 ... first surface (switching mechanism), 35 ... second surface (switching mechanism), 36 ... Rod fixing member (switching mechanism), 41 ... Coil spring (elastic member), 46 ... Hard tube, 47 ... Counterweight, 49 ... Battery.

Claims (6)

A traveling-type measuring device that performs measurement related to a measured object by a traveling measurement unit that travels on the surface of the measured object that is made of a material that is attracted by a magnet,
The travel measurement unit includes:
A plurality of wheels for traveling on the surface of the object to be measured;
A measuring instrument for measuring the measurement object;
A magnet having an adsorption surface that adsorbs to the surface of the measurement object;
Magnet holding that holds the magnet movably in the direction of contact with and away from the surface so that the magnet is attracted to the surface when the traveling measurement unit travels on the surface of the measurement object. And
An elastic member that presses the wheel against the surface in a state where the magnet is attracted to the surface of the measurement object;
A traveling type measuring apparatus, wherein a coating for reducing a frictional force with the surface of the object to be measured is provided on the attracting surface of the magnet.   The said magnet holding | maintenance part hold | maintains the said magnet so that the said attraction | suction surface can incline with respect to the left-right direction and the front-back direction of the said travel measurement part, It is characterized by the above-mentioned. Traveling type measuring device. The magnet holding part is
A rotating shaft that supports the magnet so as to be rotatable around a central axis included in a surface in which the attracting surface is perpendicular to the vertical direction of the traveling measurement unit;
The rotating shaft is configured by a switching mechanism for switching between a first posture in which the length direction of the rotating shaft matches the left-right direction and a second posture that matches the front-back direction. The traveling type measuring apparatus according to claim 2. Comprising a rope for towing and running the running measurement unit;
When the measurement object is cylindrical, when the traveling measurement unit is caused to travel on the surface along the outer periphery of the measurement object, the rope is disposed along the outer periphery of the measurement object, and one end of the measurement object is The traveling type measuring apparatus according to any one of claims 1 to 3, wherein the traveling measuring unit is fixed to a front end of the traveling measuring unit, and the other end is fixed to a rear end of the traveling measuring unit. . Comprising a plurality of hard tubes into which the rope is inserted;
The rope according to claim 4, wherein when the rope is arranged along an outer periphery of the measurement object, the rope is arranged on the measurement object in a state of being inserted into the plurality of hard tubes. Traveling type measuring device.   When the rope is arranged along the outer periphery of the measurement object, the power used in the travel measurement unit is used as a counterweight for the travel measurement unit located on the opposite side of the rope from the travel measurement unit. The travel type measuring apparatus according to claim 4, further comprising a tank for storing a battery to be supplied or a liquid used in the travel measurement unit.