JP2011075383A - In-pipe insertion ultrasonic flaw inspection apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-pipe insertion ultrasonic flaw inspection apparatus smoothly moved in a pipe by a water stream pressure only without use of a cable for supplying power to an ultrasonic probe and transmitting/receiving a signal to/from the ultrasonic probe and a cable using a coil spring for transferring an ultrasonic flaw inspection apparatus in the pipe. <P>SOLUTION: The in-pipe insertion ultrasonic flaw inspection apparatus 10 comprises: the ultrasonic probe 11 for irradiating the inner wall of the pipe 40 with ultrasonic waves, and receiving ultrasonic reflection waves; a pulse generating/receiving section 12 for applying a pulse voltage to the ultrasonic probe 11, causing the ultrasonic probe to generate the ultrasonic waves, and receiving a pulse signal of the ultrasonic reflection waves received by the ultrasonic probe 11; a centering jig 14 for centering the ultrasonic probe relative to the radial direction of the pipe 40, and holding the ultrasonic probe; and a water turbine 114 provided on the upstream side of the ultrasonic probe 11 in the water flow direction, and rotated by a drive source as water pressurized by a water pump. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a tube insertion type ultrasonic flaw detection inspection device, and in particular, without using a cable using a coil spring or the like for transferring the ultrasonic flaw detection inspection device in a tube, or a cable for power supply or signal transmission / reception. The present invention relates to an in-pipe ultrasonic inspection apparatus capable of measuring the thickness and scratches of tubes such as boiler tubes in a heat exchanger of a thermal power plant while transferring the ultrasonic inspection apparatus with pressure. .

  Since tubes such as boiler tubes in heat exchangers such as thermal power plants pass high-temperature and high-pressure fluid inside, it is necessary to inspect the pipes for scratches, cracks, thinning, and the like. However, since tubes such as boiler tubes in such heat exchangers as thermal power plants have various structures around them after installation, it is difficult to perform external flaw detection, thickness inspection, and the like.

  Therefore, as an ultrasonic probe used for inspecting such a boiler tube or the like, the applicant of the present application is, for example, shown in Patent Document 1 as an example, and as shown in FIG. It has an ultrasonic probe holder 72 connected by a flexible shaft (elastic material such as a spring coil) 73, and is arranged opposite to the front and rear of the ultrasonic probe holder 72 of the flexible shaft 73 for alignment. Two elastic wire end fixing rings 78 are arranged at substantially equal intervals around the ring 78, and both ends thereof are arranged in the circumferential direction with a first predetermined inclination angle and a second predetermined inclination angle with respect to the axial center. Various in-pipe type ultrasonic probes including a twisted basket type aligning tool 83 having a plurality of elastic wires (alignment jigs) 77 attached to two rings 78 have been proposed.

  In FIG. 22, reference numeral 70 denotes an intraductal ultrasonic probe, 71 an ultrasonic probe main body, and 74 an endoscopic ultrasonic probe 70 that can pass smoothly even when the tube is bent. A leading end guide for guiding, 75 is a cable joint for connecting the flexible shaft 73 and the conveying cable 76, 79 is a coil pressing spring for keeping the compression pressure to the tube wall of the twisted basket type aligning tool 83 substantially constant, Reference numeral 80 is a spring pressure adjusting nut, 81 is a test tube to be inspected by the in-pipe ultrasonic probe 70, 82 is an ultrasonic propagation medium for flaw detection, and conveyance water feeding of the in-pipe ultrasonic probe 70 is performed. It is water that doubles as.

  The in-pipe ultrasonic probe 70 shown in FIG. 22 inspects the pipe while performing the transfer in the pipe by pushing with a cable using a coil spring or the like. It is shown as an in-pipe insertion type ultrasonic flaw detection apparatus in patent document 2 which becomes an application. FIG. 23 shows an outline of this, and the in-tube insertion type ultrasonic inspection apparatus shown in FIG. 23 is a guide device for feeding a connecting type guide rod 90 provided with an insertion device 88 at the tip into the header 85. 89, the end of the guide rod 90 fed into the header 85 is coupled, and a coil spring 94 provided with a local water immersion probe head (ultrasonic probe body 71 in FIG. 22) at the tip is connected to the guide rod 90. An ultrasonic flaw detection device (Pulser / Receiver) 97 connected to each end of the water hose 96, a water pump 98, Without cutting the boiler pipe 86, and without using large equipment or a large amount of water, the water is fed by the water pump 98 and the pipe is fed by the feeding device 91. Moving the probe head immersion local water in the tube by a coil spring 94 which is fed to, it is obtained by allowing the ultrasonic testing of the boiler tubes 86 inner surface. In FIG. 23, 87 is an inspection hole, 92 is a rotary inlet guide, and 93 is a support frame.

  In Patent Document 3, a cable for signal transmission / reception is connected, and an ultrasonic measurement device that is inserted into a tube and detects whether there is an abnormality in the tube wall is smoothly moved by water pressure. A front alignment transfer member and a rear alignment moving member are attached via a connection body having portability, and a front conical guide is provided in front of the front alignment member, and a rear alignment member is provided behind. Each is provided with a rear conical guide, and the front conical guide and the conical bottom of the rear conical guide face each other, so that the ultrasonic pressure measuring device can be efficiently received by receiving water pressure efficiently. An ultrasonic measurement device that can be moved is shown.

Japanese Patent No. 3040641 JP-A-9-145687 Japanese Utility Model Showa 62-45167

  However, the tube such as the boiler tube in the heat exchanger is very long, for example, having a length exceeding 100 m. However, in Patent Documents 1 to 3 described above, an ultrasonic probe is used. A cable using a coil spring or the like and the force of water are used to push and move the tube little by little, which requires a long cable. However, when a cable using such a coil spring becomes long, the weight becomes very large, and this cable is expensive because it is a special cable, and the transportation cost of the cable also increases. In addition, a winding device is required to wind the cable. However, since the cable is long, the device becomes large and handling is difficult, and skill and personnel are required for inspection.

  Furthermore, if the bend part (bending part) of piping increases, the contact resistance with the cable using such a coil spring etc. will increase, and since the flow resistance of a cable is large, the pump of the water to push in requires big force. As a result, the pump becomes larger, its transportation cost is high, and various devices are required for measurement. Therefore, handling such as installation becomes large, maintenance is not easy, and a large equipment installation space is also required. Become.

  In addition, because the pipe is inspected 360 degrees, there are areas that cannot be measured even if a plurality of channels are set. However, an increase in the number of channels increases the number of parts and the cable diameter, increasing the risk of failure and increasing the thickness measuring device. The main body becomes large, and it takes time and labor to carry, assemble, and adjust at the site, making the operation (adjustment) complicated. Eventually, it affects the transportability, which limits the increase in the number of channels. In addition, it is necessary to secure a dedicated high-voltage power supply, but there is a risk of electric shock due to the combined use of water. In overseas construction, expensive transportation costs and a long transportation period are required. The ultrasonic probe is made of metal and has a specific gravity. Therefore, there is a problem that it is easy to bend because it is large, and in that case, it comes into contact with the protrusions on the inner surface of the tube and the insertability is lowered.

  The present invention has been made in view of the above circumstances, and uses a cable for supplying power to the ultrasonic probe and transmitting / receiving signals, a coil spring for in-tube transfer of the ultrasonic flaw detector, and the like. It is an object of the present invention to provide an in-tube ultrasonic flaw detection apparatus that can be smoothly moved in a tube by using only water flow pressure without using a cable.

  An in-pipe ultrasonic inspection apparatus according to the present invention is an in-pipe ultrasonic inspection apparatus inserted into a pipe into which water pressurized by a water pump is fed, and ultrasonic waves are applied to the inner wall of the pipe. An ultrasonic probe that irradiates and receives the reflected wave of the ultrasonic wave, and generates a ultrasonic wave by applying a pulse voltage to the ultrasonic probe and is received by the ultrasonic probe A pulse generator / receiver for receiving a pulse signal of the reflected wave of the ultrasonic wave, an alignment jig for holding the ultrasonic probe so as to be positioned in the center with respect to the radial direction of the tube, and the ultrasonic wave A water turbine is provided on the upstream side in the water flow direction of the probe, and rotates using water pressurized by the water pump as a drive source.

According to the above-mentioned in-pipe insertion type ultrasonic inspection apparatus, a cable for supplying power to the ultrasonic probe and transmitting / receiving signals, and a cable using a coil spring for in-tube transfer of the ultrasonic inspection apparatus, etc. It becomes unnecessary. Therefore, a long and expensive cable and a cable winding device are not required, and a cable transportation cost, a large-sized and large-power pump, and the like are not required. In addition, a space for installing a winding device, a pump, and the like is not necessary, and costs can be reduced. Furthermore, since handling becomes simple, no skill in inspection is required, so that the number of personnel can be reduced and maintenance can be simplified.
In addition, since there is no cable for power supply to the ultrasonic probe, transmission / reception of signals, and a cable using a coil spring or the like for in-pipe transfer of the ultrasonic flaw detection inspection apparatus, the bend part (bending part) of the pipe is eliminated. ) Contact resistance is reduced. Therefore, the in-pipe insertion type ultrasonic flaw detection inspection apparatus inserted into the pipe can be smoothly moved only by the water flow pressure.

Since the water flow supplied into the pipe is pressurized and sent by the water pump, the flow rate is constant. However, it is difficult to stabilize the speed of the tube insertion type ultrasonic flaw detector simply by extruding the tube insertion type ultrasonic flaw detector with water pressure. When flaw detection measurement is repeated with a fixed period using an in-pipe insertion type ultrasonic flaw detector, if the speed of the in-pipe ultrasonic flaw detector that travels in the pipe is not constant, the number of measurement points will be increased and the inspection result of the flaw measurement will be Unevenness occurs.
Therefore, the above-described in-pipe insertion type ultrasonic flaw detection apparatus includes a water turbine that uses a water flow as a driving force. In this case, since the flow velocity of the water flow supplied into the pipe is constant, the pipe-insertable ultrasonic flaw detector can be driven by a water turbine having a constant rotation speed and can travel inside the pipe at a stable speed. In addition, since it can travel in the pipe at a stable speed, there is no unevenness in the inspection result, and the inspection accuracy can be improved.

Moreover, you may provide the conversion means which converts the rotation speed of the said water turbine into the movement distance of the said water turbine.
Thereby, since the moving distance of a water turbine is obtained, it is possible to specify the position of the ultrasonic probe in the pipe. Therefore, the position of a flaw etc. in a pipe can be specified.

Further, a receiver for receiving a sound wave transmitted from both ends of the pipe and a reception time of the sound wave respectively received by the receiver are provided on the downstream side and the upstream side in the water flow direction of the ultrasonic probe. And a calculating unit that calculates the position of the ultrasonic probe from the time difference.
Thereby, since the position of an ultrasonic probe can be calculated, the position of a flaw etc. in a pipe can be specified.

Further, a float may be provided on the upstream side in the water flow direction of the ultrasonic probe.
The components of the in-pipe insertion type ultrasonic flaw detection apparatus usually tend to settle in water, and contact the lower tube wall with respect to the direction of gravity, which may affect the stable running of the apparatus. However, by providing a float on the upstream side in the water flow direction of the ultrasonic probe, it is possible to reduce contact between the component and the tube wall due to the weight of the component of the in-pipe insertion type ultrasonic inspection device. Therefore, it is possible to prevent the constituent elements from being pressed against the inner wall of the pipe by the water flow pressure, and it is possible to run the pipe insertion type ultrasonic inspection apparatus at a stable speed.

Moreover, you may provide the whiskers which are formed along the water flow direction of the water pressurized with the said water pump, and have a specific gravity smaller than the said water.
Thereby, it becomes easy to receive a water flow pressure, and the contact between the component and the tube wall due to the weight of the component of the in-tube insertion type ultrasonic inspection device can be reduced. Therefore, the in-pipe insertion type ultrasonic flaw detection inspection apparatus inserted into the pipe can be smoothly moved only by the water flow pressure.

Moreover, you may provide the wheel-shaped member or bearing which reduces the contact friction with the inner wall of the said pipe | tube between the inner walls of the said pipe | tube.
Thereby, since the contact friction which arises when an in-pipe insertion type ultrasonic flaw detection inspection apparatus contacts the inner wall of a pipe | tube can be reduced, it can move the inside of a pipe | tube smoothly only with a water flow pressure.

According to the present invention, there is no need for a cable for supplying power to the ultrasonic probe and transmitting / receiving signals, and a cable using a coil spring for in-tube transfer of the ultrasonic flaw detector. Therefore, a long and expensive cable and a cable winding device are not required, and a cable transportation cost, a large-sized and large-power pump, and the like are not required. In addition, a space for installing a winding device, a pump, and the like is not necessary, and costs can be reduced. Furthermore, since handling becomes simple, no skill in inspection is required, so that the number of personnel can be reduced and maintenance can be simplified.
In addition, since there are no cables for power supply to the ultrasonic probe, transmission / reception of signals, and cables using coil springs or the like for in-pipe transfer of the ultrasonic flaw detection inspection apparatus, the bend part (bending part of the pipe) ) Contact resistance is reduced. Therefore, the in-pipe insertion type ultrasonic flaw detection inspection apparatus inserted into the pipe can be smoothly moved only by the water flow pressure.
Furthermore, by providing the water turbine, the in-pipe insertion type ultrasonic flaw detector can travel in the pipe at a stable speed. Therefore, the inspection result is not uneven, and the inspection accuracy can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram showing an example of an in-tube insertion type ultrasonic flaw detection apparatus according to Embodiment 1. It is a perspective view which shows an example of a water turbine. It is a figure which shows an example of the in-pipe insertion type ultrasonic flaw inspection apparatus which concerns on Embodiment 2. FIG. It is the schematic which shows the example of a flaw detection using the in-pipe insertion type | formula ultrasonic inspection apparatus which concerns on Embodiment 2. FIG. The state which has mounted | worn with the sound wave transmitter through the insertion nozzle provided in the edge part of the boiler tube is shown. It is a schematic diagram of sound wave information and received signal information. It is a figure which shows a reception result and a measurement position. It is a graph which confirms position information. It is a figure which shows an example of the in-pipe insertion type ultrasonic flaw inspection apparatus which concerns on Embodiment 3. FIG. It is a figure which shows the other structural example of the in-pipe insertion type | formula ultrasonic inspection apparatus which concerns on Embodiment 3. FIG. It is a schematic block diagram which shows an example of the in-pipe insertion type ultrasonic flaw inspection apparatus which concerns on Embodiment 4. FIG. 10 is a view for explaining an arrangement state of a band-type plastic vibrator used in an ultrasonic probe constituting an in-tube insertion type ultrasonic flaw inspection apparatus according to Embodiment 5. FIG. 10 is a configuration example for facilitating movement of a tube insertion type ultrasonic flaw inspection apparatus according to Embodiment 6 in a tube, and is a block diagram when a float is added. FIG. 10 is a configuration example for facilitating movement of a tube insertion type ultrasonic flaw inspection apparatus according to Embodiment 7 in a tube, and is a block diagram when a whisker is added. In the configuration example for increasing the moving force in the tube of the in-tube insertion type ultrasonic inspection apparatus according to Embodiment 8, the configuration diagram when the number of jigs for aligning the ultrasonic probe is increased. is there. In the configuration example for increasing the moving force in the tube of the in-pipe insertion type ultrasonic inspection device according to the ninth embodiment, when a disk is attached to a member connecting the elements constituting the in-pipe insertion type ultrasonic inspection device FIG. It is a structural example for enlarging the moving force in the pipe | tube of the in-pipe type ultrasonic inspection apparatus which becomes this invention which concerns on Embodiment 10, It is a parachute-like or the like in the advancing direction leading component of the in-pipe type ultrasonic inspection apparatus. It is a block diagram at the time of attaching a disk-shaped water receiving part. In the configuration example for increasing the movement force in the tube of the in-pipe insertion type ultrasonic inspection device according to the eleventh embodiment, the surface of the ultrasonic probe constituting the in-pipe insertion type ultrasonic inspection device is water like a blanket. It is a block diagram at the time of providing the member which produces a shearing force. In the configuration example for increasing the moving force in the pipe of the in-pipe ultrasonic inspection apparatus according to the twelfth embodiment, a recess is provided on the side where the water flow of the elements constituting the in-pipe ultrasonic inspection apparatus hits, It is a block diagram at the time of raising a pressure. In the configuration example for increasing the moving force in the tube of the in-pipe insertion type ultrasonic inspection device according to the thirteenth embodiment, in which the constituent elements of the in-pipe insertion type ultrasonic inspection device are provided with unevenness and the hydrodynamic force is used FIG. In the configuration example for increasing the moving force in the tube of the in-pipe insertion type ultrasonic inspection device according to the fourteenth embodiment, the coefficient of friction with the tube wall is reduced in the elements constituting the in-pipe insertion type ultrasonic inspection device, for example. It is a block diagram at the time of providing a wheel-like thing. It is the structure schematic for demonstrating the conventional in-pipe insertion type ultrasonic flaw inspection apparatus pushed in in the pipe | tube with the cable. It is a figure for demonstrating the apparatus outline for inspecting the pipe | tube in heat exchangers, such as a thermal power plant, using the conventional ultrasonic insertion inspection apparatus in a pipe | tube.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[Embodiment 1]
FIG. 1 is a schematic configuration diagram illustrating an example of an in-tube insertion type ultrasonic flaw detection apparatus according to the first embodiment. FIG. 2 is a perspective view illustrating an example of a water turbine.

As shown in FIG. 1, the in-pipe insertion type ultrasonic flaw detection apparatus 10 mainly includes an ultrasonic probe (sensor) 11, a pulse generation / reception unit (Pulser / Receiver) 12, and an alignment jig 14. The water turbine 114 and a conversion device (corresponding to conversion means) 116 are provided.
Further, the in-pipe insertion type ultrasonic flaw detection inspection apparatus 10 serves as a power source for driving the tip guide 15 for running while sliding while contacting the head so as not to be caught at the bent portion of the pipe 40 and the ultrasonic transmission / reception apparatus 12. A battery (battery) 13. The components of these in-pipe insertion type ultrasonic inspection equipment 10 are connected to each other by a flexible shaft 16.

  The ultrasonic probe (sensor) 11 irradiates the inner wall of the tube 40 with ultrasonic waves and receives ultrasonic reflected waves. Although not shown, the ultrasonic probe 11 has a piezoelectric element that vibrates when a pulse voltage is applied.

  The pulse generation / reception unit 12 applies a pulse voltage to the ultrasonic probe 11 to generate an ultrasonic wave, and receives a pulse signal of a reflected wave of the ultrasonic wave received by the ultrasonic probe 11.

  The alignment jig 14 holds the ultrasonic probe 11 so as to be positioned in the center with respect to the radial direction of the tube 40.

The water turbine 114 is provided on the upstream side in the water flow direction of the ultrasonic probe 11 and rotates using water pressurized by a water pump (not shown) as a drive source. In particular, from the viewpoint of sufficiently obtaining the effect of the water turbine 114, the water turbine 114 is preferably provided on the most upstream side in the water flow direction.
As the water turbine 114, for example, as shown in FIG. 2, an impeller having a configuration in which blades 114B are arranged at a constant interval at an end portion of the shaft 114A.

Since the water flow supplied into the pipe 40 is pressurized and sent by the water pump, the flow rate is constant. In this case, the in-pipe insertion type ultrasonic flaw detector 10 can be propelled by the water turbine 114 having a constant rotation speed and can travel in the pipe at a stable speed.
Therefore, according to the above-described in-pipe insertion type ultrasonic flaw detection apparatus, since it is possible to travel in the pipe at a stable speed, measurement is performed when flaw detection measurement is repeated at a constant period using the in-pipe insertion type ultrasonic flaw detection apparatus 10. It is possible to prevent the occurrence of score density. Thereby, there is no unevenness in the inspection result of the tube flaw detection inspection using the tube insertion type ultrasonic flaw detection inspection apparatus 10, and the accuracy of the inspection can be improved.

The conversion device 116 converts the rotational speed of the water turbine 114 into a moving distance of the water turbine 114.
Thereby, since the moving distance of the water turbine 114 is obtained, the position of the ultrasonic probe 11 in the tube 40 can be specified. Therefore, the position of a scratch or the like in the tube 40 can be specified.

  Although not shown, the position may be specified using an acceleration sensor instead of the conversion device 116. The acceleration can be monitored at a constant period, the position of the ultrasonic probe 11 can be calculated from the acceleration by a known calculation method, and the position of a flaw or the like in the tube 40 can be specified.

  The in-pipe insertion type ultrasonic inspection apparatus 10 is inserted into a pipe 40 into which water pressurized by a water pump (not shown) is sent, and receives the water pressure in the water flow direction 42 as shown in FIG. Drive inside.

As described above, the tube insertion type ultrasonic flaw detection inspection apparatus 10 uses a cable for power supply to the ultrasonic probe 11 and transmission / reception of signals, a coil spring for in-tube transfer of the ultrasonic flaw detection inspection apparatus, and the like. The cable that was used becomes unnecessary. Therefore, a long and expensive cable and a cable winding device are not required, and a cable transportation cost, a large-sized and large-power pump, and the like are not required. In addition, a space for installing a winding device, a pump, and the like is not necessary, and costs can be reduced. Furthermore, since handling becomes simple, no skill in inspection is required, so that the number of personnel can be reduced and maintenance can be simplified.
Further, the cable for supplying power to the ultrasonic probe 11 and transmitting / receiving signals, and the cable using the coil spring for transferring the ultrasonic inspection apparatus in the pipe are eliminated, so that the bend portion of the pipe 40 can be used. The contact resistance is reduced. Therefore, the in-tube insertion type ultrasonic flaw inspection apparatus 10 inserted into the tube 40 can be smoothly moved only by the water flow pressure.

[Embodiment 2]
Next, an intraductal ultrasonic inspection device according to the second embodiment will be described.
FIG. 3 is a diagram illustrating an example of an intraductal ultrasonic inspection device according to the second embodiment. FIG. 4 is a schematic diagram illustrating a flaw detection example using the in-tube insertion type ultrasonic flaw detection inspection apparatus according to the second embodiment. FIG. 5 shows a state where the sound wave transmitter is mounted via an insertion nozzle provided at the end of the boiler tube. FIG. 6 is a schematic diagram of sound wave information and received signal information. FIG. 7 is a diagram illustrating reception results and measurement positions. FIG. 8 is a graph for confirming position information.

The tube insertion type ultrasonic flaw inspection apparatus 100 according to the second embodiment is different from that shown in FIG. 1 except that the method for specifying the position of the ultrasonic probe 11 in the tube 40 using the conversion device 116 shown in FIG. 1 is different. This is the same configuration as the in-pipe insertion type ultrasonic flaw detection inspection apparatus 10 described in. In FIG. 3, for simplicity of explanation, the pulse generator / receiver 12, the battery 13, the water turbine 114, and the tip guide 15 are omitted, and the ultrasonic probe 11 and the alignment jig 14 are omitted. And showed.
The detailed description of the same configuration as that of the first embodiment is omitted.

  As shown in FIG. 3, the in-pipe insertion type ultrasonic inspection apparatus 100 is configured to specify the position of the ultrasonic probe 11 as receivers 103-1 and 103-2 and storage devices 104-1 and 104-. 2 and a calculation unit (corresponding to calculation means) 106.

  The receivers 103-1 and 103-2 are provided on the downstream side and the upstream side in the water flow direction of the ultrasonic probe 11, respectively, and receive the sound waves 101 transmitted from both ends of the tube 40. In FIG. 3, the receiver provided downstream of the ultrasonic probe 11 in the water flow direction is the front receiver 103-1, and the receiver upstream of the ultrasonic probe 11 in the water flow direction is the rear receiver 103-. 2.

The storage devices 104-1 and 104-2 store data information of times when the sound waves 101 are received by the front receiver 103-1 and the rear receiver 103-2.
In FIG. 3, two storage devices are provided, and the time data is stored independently in the storage device 104-1 downstream in the water flow direction and the storage device 104-2 upstream in the water flow direction. However, the present invention is not limited to this, and the storage device may be shared as one unit.

  The calculation unit 106 calculates the position of the ultrasound probe 11 from the time difference between the reception times of the sound waves 101 received by the front-side receiver 103-1 and the rear-side receiver 103-2. Thus, since the position of the ultrasound probe 11 can be calculated, the position of a flaw or the like in the tube 40 can be specified.

As shown in FIG. 4, the sound wave 101 is transmitted by sound wave transmitters 102-1 and 102-2 provided at the entrance / exit portions 40a and 40b at both ends of the tube 40, respectively.
As shown in FIG. 5, the sonic transmitter 102-2 may be mounted via an insertion nozzle 109 provided at the entrance / exit 40b of the tube 40. Although not shown, the sonic transmitter 102-1 may be mounted via an insertion nozzle 109 provided at the entrance / exit 40a of the tube 40, similar to the sonic transmitter 102-2.

  The sound wave 101 simultaneously emitted from the sound wave transmitters 102-1 and 102-2 is received by the front side receiver 103-1 and the rear side receiver 103-2, and the time information thereof is stored in the storage devices 104-1 and 104-. 2 to remember. Thereafter, the position of the acoustic probe 11 is calculated from the time information stored in the storage devices 104-1 and 104-2 using the calculation unit.

For example, in the tube insertion type ultrasonic inspection apparatus 100, first, the sound wave 101 is emitted every second from the sound wave transmitting devices 102-1 and 102-2 provided at both ends of the tube 40 in order to acquire the position information. .
As shown in FIG. 6, the emitted sound wave is stored as information (T1, T3... Tm) of reception signals of the front receiver 103-1, and received by the rear receiver 103-2. It is stored as signal information (T2, T4... Tn).
As a result, the front side receiver 103-1 and the rear side receiver 103-2 store time signals as shown in FIG.
As shown in FIG. 8, when Δt is 0, the length of the tube 40 is ½ of the total length, and when Δt is minimum or maximum, the length of the tube 40 is full length. . In this way, the calculation unit calculates the position of the acoustic probe 11 in the tube 40 from the time information.

  Therefore, after the inspection is completed, the position of the information such as the flaw detection of the tube such as the boiler tube and the thickness inspection can be specified by matching the data of the time when the sound wave 101 is received with the thickness measurement data. .

[Embodiment 3]
FIG. 9 is a diagram illustrating an example of a tube insertion type ultrasonic flaw detection apparatus according to the third embodiment. FIG. 10 is a diagram illustrating another configuration example of the intraductal ultrasonic inspection device according to the third embodiment.

In addition to the method for specifying the position of the ultrasonic probe 11 described in the first and second embodiments, for example, as shown in FIG. 9, an encoder storage device is provided at the distal end side of the ultrasonic probe (sensor) 11. 110 may be provided, and the distance may be measured by bringing the roller-shaped wheel-shaped member 111 into contact with the inner wall of the tube 40. Here, the roller-shaped wheel-shaped member having an uneven shape is formed so as to correspond to the unevenness of the inner wall of the tube 40, thereby reducing contact wear with the inner wall of the tube 40.
Thereby, it is possible to specify the position of the ultrasonic probe 11 in the tube 40 by calculating the distance from the rotational speed of the wheel-shaped member 111 and storing it in the above-described storage device. Therefore, the position of a scratch or the like in the tube 40 can be specified.

Also, as shown in FIG. 10, the roller-shaped wheel-like member shown in FIG. 9 may be attached in two directions as 111A and 111B to improve running stability. Here, by using the spring 112, a slight pressure is applied to the inner wall of the tube 40 to bring it into contact with the inner wall of the tube 40.
Similar to FIG. 9, the position of the ultrasonic probe 11 in the tube 40 can be specified.

[Embodiment 4]
FIG. 11 is a schematic configuration diagram illustrating an example of an intraductal ultrasonic inspection device according to the fourth embodiment.
The in-pipe insertion ultrasonic inspection apparatus 10 may be stored in a storage container (waterproof structure) 20 as shown in FIG. The in-tube insertion type ultrasonic flaw detection apparatus 10 includes an ultrasonic probe (sensor) 11, a pulse generation / reception unit (Pulser / Receiver) 12, a battery 13 and the like, as in FIG.

  The storage container (waterproof structure) 20 is formed into a circular shape or an oval shape with a material having a specific gravity lighter than water, such as PP resin, so that air can be confined as a waterproof structure. As a result, the tube insertion type ultrasonic flaw detection inspection apparatus 10 is conveyed in a floating state, and even if there is a protrusion on the inner surface of the tube, it does not come into contact and cause friction.

  The storage container 20 is configured so that a storage unit 21 that stores the ultrasonic probe 11, a storage unit 22 that stores the pulse generation / reception unit 12, and a battery 13 that can be closed with a lid 24 and closed at one end. And a flexible shaft 16 formed of a soft rubber such as PVC that connects the storage portions 21, 22, and 23 to each other.

  As described above, each of the storage portions 21, 22, and 23 is preferably formed into a circular shape or an oval shape so that the frictional resistance is reduced when contacting the tube wall. You may form in a shape.

  Further, the flexible shaft 16 that connects the storage portions 21, 22, and 23 is illustrated in a simplified manner in FIG. 11, but the connection portion with the storage portions 21, 22, and 23 can be formed into a screw shape so that it can be firmly coupled. In addition, it is necessary to provide a reliable waterproof structure. Therefore, for example, as in the joint between the gas outlet and the gas pipe, one end is formed in an uneven shape so that the flexible shaft 16 is pushed in with a strong pushing force, or waterproofing oil or the like is used for waterproofing. Structure. Moreover, it is preferable to increase the flexibility so that the in-tube insertion type ultrasonic inspection device 10 can smoothly pass through the bend portion of the tube 40.

[Embodiment 5]
FIG. 12 is a view for explaining the arrangement state of the band-type plastic vibrator used in the ultrasonic probe constituting the in-tube insertion type ultrasonic flaw detection apparatus according to the fifth embodiment.

  First, the mechanism is such that an inspection at 360 degrees around the ultrasonic probe (sensor) 11 can be performed at one time. However, since the ultrasonic probe used conventionally is a rigid body, it is emitted by the vibrator. The range in which ultrasound can be scanned is limited. As shown in FIG. 12A, only a narrow scan range 31 was obtained even if four channels were used.

On the other hand, for example, an ultrasonic transducer arranged on a curved surface has recently appeared. As shown in FIG. 12 (B-1) and FIG. 12 (B-2), four ultrasonic transducers are arranged in the central portion 33 of the ultrasonic probe 11 in accordance with the curvature thereof. By setting the scan range 34 to 90 degrees, it is possible to scan 360 degrees around the central portion 33 at a time.
12 (B-1) and 12 (B-2) show the four band-type vibrators 30 divided into two for easy understanding, but in reality, the central portion 33 is shown. Four are arranged around each other at different angles by 90 degrees. Although the case where four ultrasonic transducers are arranged is shown in the above example, six or eight ultrasonic transducers may be arranged according to the corresponding angles of the transducers.

  The echo signal from the tube wall obtained from the ultrasonic probe 11 is stored in a memory (not shown) provided in the pulse generation / reception unit 12, and this in-tube insertion type ultrasonic flaw detection apparatus 10 is used for a boiler tube or the like. After being discharged from the tube 40, only the data is taken out to a personal computer or the like, and the location such as scratches or thinning is analyzed.

  At that time, the position in the tube 40 of the tube insertion type ultrasonic flaw inspection apparatus 10 becomes a problem. For example, a bend portion (bent portion) of piping such as a boiler tube or a welding portion of piping causes a specific echo. A transmitter is provided to measure the time interval between these unique echoes and divide the intervals evenly, or to transmit a signal for recognizing position information from the in-pipe insertion type ultrasonic inspection apparatus 10, and obtain the position from the signal. You may do it.

  By doing so, the tube 40 can be easily inspected 360 degrees, and there is no problem of increasing the number of parts and the cable diameter unlike the conventional apparatus. In addition, there is no increased risk of failure or the wall thickness measuring device is large, making it easy to carry, assemble, adjust, and operate on-site, including the risk of electric shock, high transportation costs, and long transportation periods. It becomes unnecessary.

[Embodiment 6]
Next, a mechanism for facilitating the movement in the tube by the water flow pressure in the tube insertion type ultrasonic flaw detection apparatus 10 will be described.
FIG. 13 is a configuration example for facilitating movement of the in-pipe insertion type ultrasonic inspection apparatus according to the sixth embodiment in a tube, and is a configuration diagram in the case where a float is added.

  The in-tube ultrasonic inspection apparatus 10 shown in FIG. 13 is the same as the in-tube ultrasonic inspection apparatus 10 described in FIG. 1 except that the float added to the ultrasonic probe 11 is added. Since it is a structure, the illustration is partially omitted. The detailed description of the same configuration as that of the first embodiment is omitted.

As shown in FIG. 13, the float 41 is preferably provided upstream of the ultrasonic probe 11 in the water flow direction 42.
When the float 41 is added to the downstream side of the ultrasonic probe 11, the ultrasonic probe 11 is pressed against the inner wall of the tube 40 by the water pressure, and friction may increase. When the float 41 is added to the upstream side of the contactor 11, the ultrasonic probe 11 is not pressed against the wall of the tube 40 by the water pressure, so that the inside of the tube 40 can be smoothly moved by the water pressure. .

The float 41 is formed by confining air with a resin whose specific gravity is lighter than that of water, or made of light wood.
The components of the in-pipe insertion type ultrasonic inspection apparatus 10 generally tend to settle in water, and contact the lower tube wall with respect to the direction of gravity, which may affect the stable running of the apparatus. However, by providing the float 41 on the upstream side in the water flow direction of the ultrasonic probe 11, the contact between the component and the tube wall due to the weight of the component of the in-pipe insertion type ultrasonic inspection device 10 is reduced. Can do. Therefore, it can prevent that a component is pressed on the inner wall of the pipe | tube 40 with a water flow pressure, and can drive the pipe insertion type ultrasonic flaw detection apparatus 10 at the stable speed.

  In addition to the ultrasonic probe 11, the float 41 may be provided in, for example, a heavy battery (battery) 13, or provided in all the components of the in-pipe insertion type ultrasonic inspection apparatus 10. Also good.

[Embodiment 7]
FIG. 14 is a configuration example for facilitating the movement of the in-tube insertion type ultrasonic flaw inspection apparatus according to the seventh embodiment in a tube, and is a configuration diagram in the case where a beard is added.
In order to simplify the description, the in-pipe ultrasonic inspection apparatus shown in FIG. 14 includes a pulse generation / reception unit 12, a water turbine 114, a battery 13, an alignment jig 14, and a tip guide 15. Omitted, the ultrasonic probe 11 and the flexible shaft 16 are shown.

  As shown in FIG. 14, the ultrasound probe 11 includes a whisker 43 formed along the water flow direction 42 of water pressurized by a water pump (not shown) and having a specific gravity smaller than that of water. Also good.

The whiskers 43 are preferably made of resin or carbon fiber having a specific gravity lower than that of water, for example. Also good. Further, the length of the whiskers 43 is not particularly limited as long as it can increase the resistance to water flow, but the ultrasonic probe 11 is positioned at the center in contact with the tube wall of the tube 40. Alternatively, the frictional resistance may not be generated by not contacting the tube 40.
In addition, although the example which adds the whiskers 43 to the ultrasonic probe 11 was demonstrated in FIG. 14, if the object to which the whiskers 43 are added is a component of an in-tube insertion type ultrasonic inspection apparatus, There is no particular limitation.

  As a result, the resistance against the water flow 42 can be increased and the water pressure can be easily received, and the contact between the component and the tube wall due to the weight of the component of the in-pipe insertion type ultrasonic inspection device can be reduced. Therefore, the in-pipe insertion type ultrasonic flaw inspection apparatus inserted into the pipe 40 can be smoothly moved only by the water flow pressure.

[Embodiment 8]
FIG. 15 is a configuration example for increasing the moving force in the tube of the in-tube insertion type ultrasonic inspection device according to the eighth embodiment, and the number of jigs for aligning the ultrasonic probe is increased. FIG.
In the in-tube ultrasonic inspection apparatus shown in FIG. 15, in order to simplify the explanation, the pulse generation / reception unit 12, the water turbine 114, the battery 13, and the tip guide 15 are omitted, and the ultrasonic inspection is performed. The child 11, the alignment jig 14, and the flexible shaft 16 are shown.

As shown in FIG. 15, the alignment jig 14 is formed with a plurality of elastic wires. When the alignment jig 14 formed in this manner is used, the total water flow pressure received by each alignment jig 14 is increased, and the drag force against the water flow 42 is increased.
Therefore, since the water flow pressure received from the water flow 42 increases, the movement of the in-tube insertion type ultrasonic flaw detection apparatus in the tube 40 becomes smooth. In addition, since the force for positioning the ultrasonic probe 11 substantially at the center of the tube 40 is increased, the accuracy is improved.

[Embodiment 9]
FIG. 16 is a configuration example for increasing the moving force in a tube of the in-pipe insertion type ultrasonic inspection device according to the ninth embodiment. It is a block diagram at the time of attaching.
In order to simplify the explanation, the in-pipe ultrasonic inspection apparatus shown in FIG. 16 includes a pulse generation / reception unit 12, a water turbine 114, a battery 13, an alignment jig 14, and a tip guide 15. Omitted, the ultrasonic probe 11 and the flexible shaft 16 are shown.

The flexible shaft 16 has a plurality of disks 48 as shown in FIG.
Unlike the alignment jig 14, the disk 48 needs to have a diameter equal to or smaller than the diameter that can pass through the bend portion of the tube 40, and the area that receives the water flow pressure is inevitably small. The resistance against the water flow 42 can be increased. Therefore, the movement in the tube 40 of the tube insertion type ultrasonic flaw detection apparatus becomes smooth.

[Embodiment 10]
FIG. 17 is a configuration example for increasing the moving force in the tube of the in-pipe ultrasonic inspection device according to the present invention according to the tenth embodiment, and is the first component in the traveling direction of the in-pipe ultrasonic inspection device. It is a block diagram at the time of attaching a parachute shape and a disk-shaped water-receiving part to the.

  The in-pipe ultrasonic inspection apparatus shown in FIG. 17 includes a pulse generation / reception unit 12, a water turbine 114, a battery 13, an alignment jig 14, and a tip guide 15 for the sake of simplicity. Omitted, the ultrasonic probe 11 and the flexible shaft 16 are shown.

As shown in FIG. 17, the ultrasonic probe 11 includes a parachute 50 or a disk 51 connected by a lightweight wire 52 or the like downstream of the water flow direction 42.
The parachute 50 or the disk 51 is formed so as to be held by a light specific gravity material such as aluminum or plastic.

Unlike the alignment jig 14, the parachute-like object 50 or the disk 51 needs to have a diameter equal to or smaller than the diameter that can pass through the bend portion in the tube 40, but the parachute-like object 50 is different from the alignment jig 14. The water flow 42 is received greatly and the entrainment increases, and the resistance against the water flow 42 can be increased. Further, by providing a plurality of disks 51 as in the ninth embodiment, the resistance against the water flow 42 can be increased.
Therefore, the movement in the tube 40 of the tube insertion type ultrasonic flaw detection apparatus becomes smooth.

[Embodiment 11]
FIG. 18 is a configuration example for increasing the moving force in the tube of the in-pipe insertion type ultrasonic inspection device according to the eleventh embodiment, and a blanket is provided on the surface of the ultrasonic probe constituting the in-pipe insertion type ultrasonic inspection device. It is a block diagram at the time of providing the member which produces a shearing force in water like this.

  The in-pipe ultrasonic inspection apparatus shown in FIG. 18 includes a pulse generation / reception unit 12, a water turbine 114, a battery 13, an alignment jig 14, and a tip guide 15 for the sake of simplicity. Omitted, the ultrasonic probe 11 and the flexible shaft 16 are shown.

  On the surface of the ultrasonic probe 11, as shown in FIG. 18, a plurality of convex portions 55 projecting against the water flow are provided. The plurality of convex portions 55 may be, for example, a blanket as long as the surface is rough, or may be a clothing brush planted in a cloth-like material. 11 is attached to the surface of 11.

Thereby, by disturbing the water flow 42, a part of the water flow 42 is taken in the vicinity of the ultrasonic probe 11, and this becomes a drag force against the water flow 42. Since the tube insertion type ultrasonic flaw detection inspection apparatus 10 is pushed by this drag, the movement of the tube insertion type ultrasonic flaw inspection apparatus in the tube 40 becomes smooth.
In addition, although the example which forms the some convex part 55 in the ultrasonic probe 11 was demonstrated in FIG. 18, the object which forms the some convex part 55 is a component of the in-pipe insertion type | formula ultrasonic inspection apparatus. If there is no particular limitation.

[Embodiment 12]
FIG. 19 is a configuration example for increasing the moving force in the pipe of the in-pipe ultrasonic inspection apparatus according to the twelfth embodiment. It is a block diagram at the time of providing water flow pressure.

  In order to simplify the description, the in-pipe ultrasonic inspection apparatus shown in FIG. 19 includes a pulse generation / reception unit 12, a water turbine 114, a battery 13, an alignment jig 14, and a tip guide 15. Omitted, the ultrasonic probe 11 and the flexible shaft 16 are shown.

The ultrasonic probe 11 is provided with a recess 61 on the side on which the water flow 42 hits.
By providing such a depression 61, the water flow 42 is increased, and the pressure difference is increased, thereby increasing the water flow pressure. Therefore, the movement in the tube 40 of the tube insertion type ultrasonic flaw detection inspection apparatus 10 becomes smooth.

  In addition, although the example which forms the hollow 61 in the ultrasonic probe 11 was demonstrated in FIG. 19, the object which forms the hollow 61 will not be specifically limited if it is a component of the in-tube insertion type | formula ultrasonic inspection apparatus.

[Embodiment 13]
FIG. 20 is a configuration example for increasing the moving force in the pipe of the in-pipe insertion type ultrasonic inspection apparatus according to the thirteenth embodiment. It is a block diagram in the case of using.

  The in-pipe ultrasonic inspection apparatus shown in FIG. 20 includes a pulse generation / reception unit 12, a water turbine 114, a battery 13, an alignment jig 14, and a tip guide 15 for the sake of simplicity. Omitted, the ultrasonic probe 11 and the flexible shaft 16 are shown.

As shown in FIG. 20, the ultrasonic probe 11 is provided with irregularities 63 on the surface along the water flow direction.
The unevenness 63 is not particularly limited as long as it entrains the water flow 42 and generates a fluid force, and may be a disc shape as shown in FIG. 20 or an unevenness provided on the component itself. Also good.

  By providing such an unevenness 63, the water flow 42 is entrained more and the pressure difference becomes larger and the water flow pressure can be increased. Therefore, the movement in the tube 40 of the tube insertion type ultrasonic flaw detection inspection apparatus 10 becomes smooth.

  In addition, although the example which forms the unevenness | corrugation 63 in the ultrasonic probe 11 was demonstrated in FIG. 20, the object which forms the unevenness | corrugation 63 will not be specifically limited if it is a component of an in-pipe insertion type ultrasonic flaw inspection apparatus.

[Embodiment 14]
FIG. 21 is a configuration example for increasing the moving force in the pipe of the in-pipe ultrasonic inspection apparatus according to the fourteenth embodiment, and the coefficient of friction with the pipe wall is an element constituting the in-pipe ultrasonic inspection apparatus. It is a block diagram at the time of providing a wheel-like thing, for example.

  The in-pipe ultrasonic inspection apparatus shown in FIG. 21 includes a pulse generation / reception unit 12, a water turbine 114, a battery 13, an alignment jig 14, and a tip guide 15 for the sake of simplicity. Omitted, the ultrasonic probe 11 and the flexible shaft 16 are shown.

As shown in FIG. 21, a wheel-like member or a bearing 65 that reduces contact friction with the inner wall of the tube 40 may be provided between the ultrasonic probe 11 and the inner wall of the tube 40.
Here, a wheel-like member or a bearing is used to reduce the contact friction with the inner wall of the tube 40, but the friction generated when the ultrasonic probe 11 comes into contact with the tube wall is reduced. If it is, it will not specifically limit, You may use a member with small friction coefficients, such as a fluororesin.
Thereby, the contact friction which arises when an in-pipe insertion type ultrasonic flaw detection inspection apparatus contacts the inner wall of the pipe | tube 40 can be reduced. Therefore, the in-pipe insertion type ultrasonic flaw detection apparatus can smoothly move in the pipe only with the water flow pressure.

Although an example of the present invention has been described in detail above, the present invention is not limited thereto, and it goes without saying that various improvements and modifications may be made without departing from the scope of the present invention.
For example, you may combine Embodiment 1, Embodiment 2, and Embodiment 3-14 suitably.

  According to the present invention, it is possible to easily perform inspection of tubes such as boiler tubes in a heat exchanger such as a thermal power plant that conventionally required skill, and to accurately manage the heat exchanger such as a thermal power plant. Will be able to.

10 In-pipe insertion type ultrasonic inspection equipment 11 Ultrasonic probe (sensor)
12 Pulse generator / receiver (Pulser / Receiver)
13 Batteries
14 Alignment jig 15 End guide 16 Flexible shaft 20 Storage container (waterproof structure)
40 pipe 114 water turbine 116 conversion device

Claims (6)

In-pipe insertion type ultrasonic inspection device inserted into a pipe into which water pressurized by a water pump is fed,
An ultrasonic probe for irradiating the inner wall of the tube with ultrasonic waves and receiving the reflected waves of the ultrasonic waves;
A pulse generation receiving unit that applies a pulse voltage to the ultrasonic probe to generate an ultrasonic wave and receives a pulse signal of the reflected wave of the ultrasonic wave received by the ultrasonic probe;
An alignment jig for holding the ultrasonic probe so as to be positioned in the center with respect to the radial direction of the tube;
An in-pipe type ultrasonic flaw inspection apparatus provided with a water turbine provided on the upstream side in the water flow direction of the ultrasonic probe and rotating with water pressurized by the water pump as a drive source.   2. The in-pipe insertion type ultrasonic inspection apparatus according to claim 1, further comprising a conversion unit that converts a rotational speed of the water turbine into a moving distance of the water turbine. A receiver for receiving sound waves transmitted from both ends of the pipe, respectively provided on the downstream side and the upstream side in the water flow direction of the ultrasonic probe;
The in-pipe insertion type ultrasonic inspection apparatus according to claim 1, further comprising: a calculation unit that calculates a position of the ultrasonic probe from a time difference between reception times of sound waves received by the receivers. .   The in-pipe insertion type ultrasonic flaw detection apparatus according to any one of claims 1 to 3, further comprising a float on an upstream side in the water flow direction of the ultrasonic probe.   The pipe according to any one of claims 1 to 4, further comprising a whisker that is formed along a water flow direction of water pressurized by the water pump and has a specific gravity smaller than that of the water. Insertion type ultrasonic inspection equipment.   The tube-insertable ultrasonic wave according to any one of claims 1 to 5, further comprising a wheel-like member or a bearing that reduces contact friction with the inner wall of the tube between the inner wall of the tube. Flaw detection equipment.

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