JP2010107387A - Ultrasonic flaw detection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To promote elimination of air bubbles contained in a medium in a medium support. <P>SOLUTION: An ultrasonic flaw detection device is provided with: an ultrasonic unit 170 transmitting ultrasonic waves to an object to be inspected and receiving ultrasonic waves reflected by the object to be inspected; and a medium support 110 located between the ultrasonic unit 170 and the object to support a medium transmitting ultrasonic waves. The medium support 110 includes: a surface 111 opposed to an object to be inspected; a through-hole 120; as a medium supporting chamber to open toward the surface 111 to store a medium; a supply hole 130 to supply a medium in the through-hole 120; and longitudinally directional groove 150 formed on the surface 111, to make the medium supporting chamber communicate with the outside of the medium supporting chamber. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an ultrasonic flaw detector that inspects whether or not a subject is damaged by ultrasonic waves.

  There is an ultrasonic flaw detector that inspects whether or not a subject has a flaw by transmitting ultrasonic waves toward the subject to be inspected and receiving ultrasonic waves reflected by the subject. In the ultrasonic flaw detection apparatus, it is necessary to fill a medium for transmitting ultrasonic waves, for example, water, between an ultrasonic element that transmits and receives ultrasonic waves and a subject.

  As a method for filling water between an ultrasonic element and a subject, there is a method in which a subject is attached to a pool in which water is stored and flaw detection is performed in the pool. However, the pool needs to be formed in a size that allows the entire specimen to be contained therein. Therefore, a larger pool is required as the subject size increases.

  In view of this, a technique has been devised in which water is temporarily filled between the ultrasonic element and the subject without placing the subject on the pool, and flaw detection is performed by ultrasonic waves. For example, Patent Document 1 discloses that an ultrasonic element and a subject are placed between a subject and an ultrasonic transmission / reception apparatus without placing the subject in a pool by placing a water collecting jig for temporarily storing water. A technique for filling water in between is disclosed.

JP-A-10-142207

  Here, when the medium is held between the subject and the ultrasonic element by the medium holding body, if the medium in the medium holding body contains bubbles, the ultrasonic flaw detector determines the bubbles as scratches. Thereby, the ultrasonic flaw detector may not be able to correctly inspect whether or not the subject has a flaw if the medium in the medium holding body contains bubbles.

  Therefore, the technology disclosed in Patent Document 1 eliminates bubbles by ejecting a medium in the arrangement direction of the ultrasonic elements. However, the technique disclosed in Patent Document 1 is insufficient in eliminating bubbles contained in the medium in the medium holding body.

  The present invention has been made in view of the above, and an object thereof is to promote the elimination of bubbles contained in a medium in a medium holding body.

  In order to solve the above-described problems and achieve the object, the ultrasonic flaw detection apparatus according to the present invention can transmit an ultrasonic wave toward the subject and can receive the ultrasonic wave reflected by the subject. An ultrasonic element, and a medium holder that is disposed between the ultrasonic element and the subject and holds a medium that transmits the ultrasonic wave, the medium holder facing the subject An object-facing surface that is formed on the object-facing surface; a medium holding chamber that opens to the object-facing surface and stores the medium; a medium supply unit that supplies the medium to the medium holding chamber; And a groove communicating with the outside of the medium holding chamber and the outside of the medium holding chamber.

  With the above configuration, in the ultrasonic flaw detector, the medium overflowing from the medium holding chamber is positively discharged from the groove. When the discharge of the medium is promoted, the flow velocity of the medium increases even if the flow rate of the medium supplied to the medium holding chamber is not increased. When the flow velocity of the medium increases, the bubbles contained in the medium also flow with the medium, so that the removal of the medium is promoted. Therefore, in the ultrasonic flaw detector, the elimination of bubbles is promoted.

  As a preferred aspect of the present invention, the medium holding chamber has a shape that is long in a direction along the object-facing surface, and the groove opens at an end in the longitudinal direction of the medium holding chamber, and It is desirable to form along the longitudinal direction.

  The medium mainly flows in the longitudinal direction of the medium holding chamber. Therefore, by forming the groove along the longitudinal direction of the medium holding chamber, the groove is formed along the flow direction of the medium. With the above configuration, the medium holding body can promote the discharge of the medium from the groove.

  As a preferred aspect of the present invention, the groove is formed with at least two of a first groove and a second groove, and the first groove opens at an end portion on one side in the longitudinal direction of the medium holding chamber, It is desirable that the second groove is opened at an end portion on the other side in the longitudinal direction of the medium holding chamber.

  With the above configuration, the medium holding body can promote discharge of the medium on both sides in the longitudinal direction of the medium holding chamber. Therefore, the medium holding body increases the flow velocity of the medium on both sides in the longitudinal direction of the medium holding chamber. As a result, the medium holding body can promote the elimination of bubbles contained in the medium on both sides in the longitudinal direction of the medium holding chamber.

  In a preferred aspect of the present invention, the medium holding chamber has a shape that is long in a direction along the object-facing surface, and the medium supply means opens at an end in the longitudinal direction of the medium holding chamber. The holes are preferably formed along the longitudinal direction.

  Here, when the medium is supplied to the medium holding chamber along the direction intersecting the longitudinal direction of the medium holding chamber, the flow direction changes from the direction intersecting the longitudinal direction of the medium holding chamber to the longitudinal direction of the medium holding chamber. be changed. Thereby, the flow velocity of the medium is reduced.

  However, the medium holder is supplied with the medium along the longitudinal direction of the medium holding chamber by the above configuration. Therefore, the medium holding body can suppress a decrease in the flow velocity of the medium. As a result, the medium holder can promote the elimination of bubbles contained in the medium.

  As a preferred aspect of the present invention, there is provided a guide member that is provided in a portion where the medium supply unit opens in the medium holding chamber and changes the flow of the medium flowing out from the medium supply unit to the object facing surface side. It is desirable to have.

  With the above configuration, the medium holding body increases the flow velocity of the medium on the object facing surface side. Therefore, the medium holding body can promote the elimination of bubbles contained in the medium on the object facing surface side.

  As a preferred aspect of the present invention, it is desirable that the medium supply means is formed along the subject facing surface while opening to the subject facing surface side of the medium holding chamber.

  With the above configuration, the medium holding body increases the flow velocity of the medium on the object facing surface side. Therefore, the medium holding body can promote the elimination of bubbles contained in the medium on the object facing surface side.

  As a preferred aspect of the present invention, it is desirable that the medium supply means is formed to be inclined in a direction approaching the object facing surface side toward the medium holding chamber.

  With the above configuration, the medium holding body increases the flow velocity of the medium on the object facing surface side. Therefore, the medium holding body can promote the elimination of bubbles contained in the medium on the object facing surface side.

  As a preferred aspect of the present invention, the medium supply means is provided with at least two of a first medium supply means and a second medium supply means, and the ultrasonic flaw detector has the first medium supply means in which the medium holding chamber is provided. A first guide member that is provided at a portion that opens to the object-facing surface and changes the flow of the medium flowing out from the first medium supply means toward the subject-facing surface; and the second medium supply means is provided in the medium holding chamber. It is desirable to include a second guide member that is provided in the opening portion and changes the flow of the medium flowing out from the second medium supply means to the ultrasonic element side.

  With the above configuration, the medium holding body increases the flow velocity of the medium on the object facing surface side and the flow velocity of the medium on the ultrasonic element side. Therefore, the medium holding body can promote the elimination of the bubbles contained in the medium on the object facing surface side and the bubbles contained in the medium on the ultrasonic element side.

  As a preferred aspect of the present invention, the medium supply means includes at least two of a first medium supply means and a second medium supply means, and the first medium supply means is the object facing surface of the medium holding chamber. And the second medium supply means is formed along the object facing surface while opening to the ultrasonic element side of the medium holding chamber. It is desirable.

  With the above configuration, the medium holding body increases the flow velocity of the medium on the object facing surface side and the flow velocity of the medium on the ultrasonic element side. Therefore, the medium holding body can promote the elimination of the bubbles contained in the medium on the object facing surface side and the bubbles contained in the medium on the ultrasonic element side.

  As a preferred aspect of the present invention, the medium supply means is provided with at least two of a first medium supply means and a second medium supply means, and the first medium supply means is closer to the medium holding chamber. It is desirable that the second medium supply means is formed to be inclined in a direction approaching the ultrasonic element side toward the medium holding chamber.

  With the above configuration, the medium holding body increases the flow velocity of the medium on the object facing surface side and the flow velocity of the medium on the ultrasonic element side. Therefore, the medium holding body can promote the elimination of the bubbles contained in the medium on the object facing surface side and the bubbles contained in the medium on the ultrasonic element side.

  In a preferred aspect of the present invention, the medium holding chamber has a shape that is long in a direction along the object-facing surface, and the medium supply unit includes one side and the other side in the longitudinal direction of the medium holding chamber. And a hole formed along a direction intersecting the longitudinal direction, and on the object-facing surface, a central portion in the longitudinal direction of the medium holding chamber and an outside of the medium holding chamber It is desirable to form a central groove that communicates with each other.

  With the above configuration, the medium holding body positively discharges the medium from the central groove formed in the central portion in the longitudinal direction of the medium holding chamber. Therefore, the medium holding body increases the flow velocity of the medium at the center in the longitudinal direction of the medium holding chamber. As a result, the medium holding body can promote the elimination of bubbles contained in the medium at the center in the longitudinal direction of the medium holding chamber.

  As a preferred aspect of the present invention, the medium holding chamber has a shape that is long in a direction along the object-facing surface, and the medium supply means is provided at the center in the longitudinal direction of the medium holding chamber. The holes are preferably formed along a direction intersecting the longitudinal direction.

  The medium supplied to the medium holding chamber is supplied from the central portion in the longitudinal direction of the medium holding chamber. Thereby, the flow rate of the medium at the center in the longitudinal direction of the medium holding chamber is faster than the flow rate of the medium other than the center. Therefore, the medium holding body can promote the elimination of bubbles contained in the medium in the center in the longitudinal direction of the medium holding chamber.

  As a preferred aspect of the present invention, the medium holding chamber has a shape that is long in the direction along the object-facing surface, and the medium supply means is provided only on one side in the longitudinal direction of the medium holding chamber. And it is desirable that it is a hole formed along the direction which cross | intersects the said longitudinal direction.

  Here, when the medium is supplied from both sides of the medium holding chamber in the longitudinal direction, the media collide with each other at the central portion in the longitudinal direction of the medium holding chamber. Thereby, the flow velocity of the medium at the center in the longitudinal direction of the medium holding chamber is reduced.

  However, the medium holder is supplied with the medium only from one side in the longitudinal direction to the medium holding chamber due to the above configuration. Thereby, the medium does not collide in the medium holding chamber. Therefore, the medium holding body can suppress a decrease in the flow velocity of the medium. As a result, the medium holder can promote the elimination of bubbles contained in the medium.

  The present invention can promote the elimination of bubbles contained in the medium in the medium holding body.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited by the best mode for carrying out the invention (hereinafter referred to as an embodiment). In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range.

(Embodiment 1)
FIG. 1 is a cross-sectional view showing a state in which an ultrasonic flaw detection apparatus performs flaw detection by cutting along a surface along the penetration direction of a through hole. As shown in FIG. 1, the ultrasonic flaw detection apparatus 100 includes a medium holder 110, an ultrasonic unit 170, a medium supply hose 180, and a control device 190.

  The ultrasonic unit 170 is configured by arranging a plurality of ultrasonic elements 171. The ultrasonic element 171 transmits ultrasonic waves toward the subject S and receives the ultrasonic waves reflected by the subject S. The control device 190 is electrically connected to the ultrasonic unit 170 and controls the ultrasonic unit 170. In addition, the control device 190 acquires the ultrasonic wave received by the ultrasonic unit 170 as a signal.

  The control device 190 includes a calculation unit 191 and a display unit 192. The computing unit 191 determines whether or not the subject S is damaged based on the signal acquired from the ultrasound unit 170. The display unit 192 displays the result of whether or not the subject S is damaged.

  Here, for flaw detection using ultrasonic waves, a medium for transmitting ultrasonic waves, for example, water, needs to be filled between the ultrasonic unit 170 and the subject S. Therefore, the medium holder 110 that temporarily holds the water M is disposed between the ultrasonic unit 170 and the subject S.

  The medium holding body 110 is connected to a medium supply hose 180 and supplied with water M from the medium supply hose 180. The water M is temporarily held between the subject S and the ultrasonic unit 170 by the medium holder 110 and overflows from the gap between the subject S and the medium holder 110. Hereinafter, the configuration of the medium holding body 110 will be described more specifically. In the present embodiment, the case where the medium holding body 110 is disposed below the subject S in the vertical direction will be described as an example of a method of using the medium holding body 110.

  FIG. 2 is a perspective view illustrating a configuration of the medium holding body according to the first embodiment. The medium holding body 110 is formed in a rectangular parallelepiped, for example, as shown in FIG. Of the rectangular parallelepiped surfaces, the surface facing the subject S shown in FIG. 1 is the subject facing surface 111, and the surface opposite to the subject facing surface 111 is the ultrasonic element mounting surface 112.

  The medium holding body 110 includes a through hole 120, a supply hole 130 serving as a medium supply unit, a guide member 140, and a longitudinal groove 150. The through hole 120 is a space in which the water M is stored in order to hold the water M in the medium holding body 110. The through hole 120 passes through the object facing surface 111 and the ultrasonic element mounting surface 112.

  Further, the through hole 120 is formed such that the length in the direction along the arrangement direction of the ultrasonic elements 171 shown in FIG. Thereby, the through hole 120 is formed so as to surround the plurality of ultrasonic elements 171 arranged in a line. Hereinafter, the longitudinal direction in the direction along the object facing surface 111, that is, the arrangement direction of the ultrasonic elements 171 is referred to as the longitudinal direction of the through-hole 120. The direction connecting the object facing surface 111 and the ultrasonic element mounting surface 112 is referred to as the through direction of the through hole 120.

  The ultrasonic unit 170 is fixed to the ultrasonic element mounting surface 112. At this time, the ultrasonic unit 170 is fixed to the ultrasonic element mounting surface 112 by closing the opening of the through hole 120 on the ultrasonic element mounting surface 112 side. The space surrounded by the inner wall surface of the through hole 120 and the ultrasonic unit 170 stores water M as a medium holding chamber.

  Here, it is preferable that the ultrasonic unit 170 closes the opening on the ultrasonic element mounting surface 112 side of the through hole 120 without any gap. As a result, the amount of water M leaking from the gap between the opening of the through-hole 120 on the ultrasonic element mounting surface 112 side and the ultrasonic unit 170 is reduced. Is reduced.

  However, even if there is a gap between the opening on the ultrasonic element mounting surface 112 side of the through hole 120 and the ultrasonic unit 170, the amount of water M supplied to the through hole 120 is discharged from the gap. It should be more than the amount of. Even in this case, the medium holder 110 can hold the water M between the subject S and the ultrasonic unit 170 shown in FIG.

  The supply hole 130 is a hole for supplying water M into the through hole 120. The supply hole 130 includes, for example, a first supply hole 131 and a second supply hole 132. The first medium supply hose 181 shown in FIG. 1 is connected to the first supply hole 131. As a result, the medium holding body 110 is supplied with water M from the first medium supply hose 181 through the first supply hole 131 into the through hole 120. The second supply hole 132 is connected to the second medium supply hose 182 shown in FIG. As a result, the medium holding body 110 is supplied with the water M from the second medium supply hose 182 through the second supply hole 132 into the through hole 120.

  Here, when the object facing surface 111 and the ultrasonic element mounting surface 112 of the medium holding body 110 are the upper surface and the bottom surface, the surface intersecting with the longitudinal direction of the through hole 120 among the side surfaces of the medium holding body 110 is the first side surface 113. And the second side surface 114.

  The first supply holes 131 are formed along the arrangement direction of the ultrasonic elements 171. Specifically, in the first supply hole 131, an inlet 131a that is one end portion opens to the first side surface 113, and an outlet 131b that is the other end portion is an inner wall surface of the through hole 120 on the first side surface 113 side. Open to. Here, the portion of the through hole 120 where the outlet 131b is formed is an end portion of the through hole 120 in the longitudinal direction. Further, in the present embodiment, the first supply hole 131 is formed substantially parallel to the object facing surface 111.

  The second supply holes 132 are formed along the arrangement direction of the ultrasonic elements 171. Specifically, in the second supply hole 132, an inlet 132a that is one end portion opens to the second side surface 114, and an outlet 132b that is the other end portion is an inner wall surface on the second side surface 114 side of the through hole 120. Open to. Here, the portion of the through hole 120 where the outlet 132b is formed is an end portion of the through hole 120 in the longitudinal direction. Further, in the present embodiment, the second supply hole 132 is formed substantially parallel to the object facing surface 111.

  The guide member 140 is a member that changes the direction of the flow of the water M injected from the supply hole 130 into the through hole 120. For example, the guide member 140 includes a first guide member 141 and a second guide member 142. The first guide member 141 is provided on the flow of the water M injected from the first supply hole 131 into the through hole 120.

  Specifically, the first guide member 141 is provided at a portion where the first supply hole 131 opens on the inner wall surface of the through hole 120, that is, at the outlet 131 b of the first supply hole 131. The first guide member 141 has a slope 141a. The inclined surface 141a is a surface that approaches the subject facing surface 111 as the distance from the first supply hole 131 increases toward the second side surface 114 side.

  The second guide member 142 is provided on the flow of water M injected from the second supply hole 132 into the through hole 120. Specifically, the second guide member 142 is provided at a portion where the second supply hole 132 opens on the inner wall surface of the through hole 120, that is, at the outlet 132 b of the second supply hole 132. The second guide member 142 has a slope 142a. The inclined surface 142a is a surface that approaches the ultrasonic element mounting surface 112 as the distance from the second supply hole 132 increases toward the first side surface 113 side.

  The longitudinal groove 150 is a groove that overflows from the inside of the through-hole 120 and promotes the discharge of the water M that is filled between the medium holder 110 and the subject S as shown in FIG. The longitudinal groove 150 includes, for example, a first longitudinal groove 151 and a second longitudinal groove 152.

  The first longitudinal groove 151 and the second longitudinal groove 152 are concavely formed on the object facing surface 111 along the longitudinal direction of the through hole 120. Here, in the present embodiment, the first longitudinal groove 151 and the second longitudinal groove 152 are formed by cutting the medium holding body 110 from the object facing surface 111 to the ultrasonic element mounting surface 112 side. .

  The longitudinal groove 150 has a dimension in the direction from the object facing surface 111 toward the ultrasonic element mounting surface 112, that is, a depth of 0.27 mm, for example. In FIG. 1 and FIG. 2, the depth of the longitudinal groove 150 is shown enlarged for easy understanding of the configuration of the medium holder 110.

  The first longitudinal groove 151 is formed in the object facing surface 111 on the first side surface 113 side in the longitudinal direction of the through hole 120. That is, as for the 1st longitudinal direction groove | channel 151, one edge part 151a opens to the 1st side surface 113, and the other edge part 151b opens to the inner wall surface by the side of the 1st side surface 113 of the through-hole 120. Here, the portion of the through hole 120 where the other end portion 151 b is formed is an end portion on one side in the longitudinal direction of the through hole 120.

  The second longitudinal groove 152 is formed in the object facing surface 111 on the second side surface 114 side in the longitudinal direction of the through hole 120. That is, in the second longitudinal groove 152, one end 152 a opens to the second side 114, and the other end 152 b opens to the second side 114 of the through hole 120. Here, the portion of the through hole 120 where the other end 152b is formed is the other end of the through hole 120 in the longitudinal direction.

  FIG. 3 is a perspective view showing a configuration in which a second longitudinal groove is formed in a part of the second guide member. Here, when the portion of the second guide member 142 on the object facing surface 111 side is on the same plane as the object facing surface 111, the medium holding body 110 has the object facing surface 111 of the second guide member 142. A second longitudinal groove 152 is also formed on a part of the side. In this case, in the medium holder 110, the surface of the second guide member 142 on the object facing surface 111 side is handled as a part of the object facing surface 111.

  The above is the configuration of the medium holding body 110. Here, bubbles tend to accumulate at a portion where the flow rate of the water M is slow. In the conventional medium holder, the flow velocity tends to be slow at the central portion of the through hole 120 in the longitudinal direction, particularly at the subject S side, and bubbles tend to accumulate at the central portion. By increasing the flow rate of the water M supplied to the medium holder, it is possible to increase the flow rate of the water M in the central portion, but in this case, the medium holder 110 uses water necessary for flaw detection by ultrasonic waves. The amount of M increases.

  However, the medium holding body 110 according to the present embodiment can promote the exclusion of bubbles by suppressing a decrease in the flow rate of the water M while suppressing an increase in the required flow rate of the water M. Hereinafter, the principle that the medium holding body 110 can promote the elimination of bubbles will be described while mainly explaining the flow of the water M supplied to the medium holding body 110 with reference to FIGS. 1 and 2.

  First, in the medium holding body 110, water M is supplied from the first medium supply hose 181 to the inside of the through hole 120 through the first supply hole 131. Here, since the first supply hole 131 is formed in the longitudinal direction of the through hole 120 as described above, the water M flows in the longitudinal direction of the through hole 120.

  Next, as shown in FIG. 2, in the medium holding body 110, the longitudinal groove 150 is formed by the water M filled in the through-hole 120 and between the object facing surface 111 and the object S. It is actively discharged from the part. Thereby, the medium holding body 110 promotes the discharge of the water M. When the discharge of the water M is promoted, the medium holder 110 increases the flow rate of the water M, in particular, the flow rate of the water M filled between the object facing surface 111 and the object S.

  Thereby, the medium holding body 110 can promote the removal of bubbles contained in the water M filled between the object facing surface 111 and the object S. Since the bubbles are lighter than the water M, they tend to accumulate on the subject S side. The medium holding body 110 is more preferable by providing a longitudinal groove 150 on the object facing surface 111 and intensively increasing the flow velocity of the water M filled between the object facing surface 111 and the object S. It is possible to promote the elimination of bubbles contained in the water M.

  Furthermore, the medium holder 110 includes the first guide member 141, so that the flow velocity of the water M filled between the object facing surface 111 and the object S can be more intensively increased. The reason will be described below. Since the first supply hole 131 is formed substantially parallel to the subject facing surface 111, the water M passes from the first supply hole 131 substantially parallel to the subject facing surface 111 in the longitudinal direction of the through hole 120. Be injected.

  The water M sprayed from the first supply hole 131 into the through hole 120 hits the slope 141 a of the first guide member 141. Thereby, the direction of the flow is changed by the first guide member 141, and the water M flows toward the object facing surface 111 as shown in FIG. The water M flowing toward the subject facing surface 111 strikes the surface of the subject S and flows along the surface of the subject S toward the second longitudinal groove 152.

  As a result, the medium holder 110 further increases the flow rate of the water M on the subject S side where bubbles tend to accumulate without increasing the flow rate of the water M supplied to the through-hole 120. Therefore, the medium holding body 110 can promote the elimination of bubbles contained in the water M while suppressing an increase in the required flow rate of the water M.

  Here, most of the bubbles contained in the water M are air that has entered from the outside of the medium holding body 110 when the medium holding body 110 is moved along the surface of the subject S, but are dissolved in the water M. Fine air bubbles from which the air has been eluted and fine air bubbles originally contained in the medium supply hose 180 are also included. Such fine bubbles tend to be easily generated when the water M starts to be supplied to the medium holding body 110.

  This is a phenomenon that occurs because the temperature of the water M supplied to the medium holding body 110 changes. The water M is supplied by a water pipe from outside the building that houses the subject S. The temperature around the water pipe differs between the outside of the building and the inside of the building. As a result, the temperature of the water M changes, and fine bubbles are generated in the water M.

  When the medium holding body 110 is moved along the surface of the subject S, air bubbles that have entered from the outside of the medium holding body 110 tend to collect on the subject S side. The eluted fine bubbles tend to stay on the ultrasonic unit 170 side without moving to the subject S side.

  Therefore, the medium holder 110 is supplied with water M from the second supply hole 132. In the medium holding body 110, water M is supplied from the second medium supply hose 182 to the inside of the through hole 120 through the second supply hole 132. Since the second supply hole 132 is formed substantially parallel to the subject facing surface 111, the water M passes from the second supply hole 132 substantially parallel to the subject facing surface 111 in the longitudinal direction of the through hole 120. Be injected.

  The water M sprayed from the second supply hole 132 into the through hole 120 hits the slope 142 a of the second guide member 142. Thereby, the direction of the flow is changed by the second guide member 142, and the water M flows toward the ultrasonic element mounting surface 112 as shown in FIG. The water M flowing toward the ultrasonic element mounting surface 112 hits the surface of the ultrasonic unit 170 and flows toward the first side surface 113 along the surface of the ultrasonic unit 170.

  As a result, the medium holding body 110 can increase the flow rate of the water M on the ultrasonic unit 170 side where fine bubbles tend to accumulate. Therefore, the medium holding body 110 can exclude fine bubbles that tend to stay on the ultrasonic unit 170 side of the through hole 120 from the ultrasonic unit 170 side. The fine bubbles are finally caused to flow by the flow of the water M on the subject S side and discharged to the outside of the medium holding body 110.

  Here, the medium holder 110 may be constantly supplied with water M from both the first supply hole 131 and the second supply hole 132, but is always supplied with water M from the first supply hole 131. The water M is preferably supplied from the two supply holes 132 temporarily or intermittently. Hereinafter, a specific time when the water M is supplied from the second supply hole 132 will be described.

  As described above, the fine bubbles from which the air dissolved in the water M is eluted tend to be generated when the water M starts to be supplied to the medium holding body 110, for example. Accordingly, the medium holder 110 is temporarily supplied with the water M from the second supply hole 132 only when the water M starts to be supplied to the medium holder 110, for example.

  Further, the fine bubbles from which the air dissolved in the water M is eluted are more than the bubbles made of the air that has entered from the outside of the medium holding body 110 when the medium holding body 110 is moved along the surface of the subject S. The amount is small. As a result, even if the medium holding body 110 does not always promote the removal of the fine bubbles, the fine bubbles are unlikely to reach an amount that affects the flaw detection by ultrasonic waves. Therefore, the medium holding body 110 is intermittently supplied with the water M from the second supply hole 132 at predetermined time intervals, for example.

  Thus, even when the water M is supplied from the second supply hole 132 temporarily or intermittently, the medium holder 110 can sufficiently promote the elimination of fine bubbles. In this case, the medium holding body 110 can reduce the flow rate of the water M necessary for flaw detection using ultrasonic waves, compared with the case where the water M is always supplied from the second supply hole 132.

  In addition, when there are few fine bubbles from which the air dissolved in the water M is eluted, or when fine bubbles accumulated on the ultrasonic unit 170 side may be used for flaw detection by ultrasonic waves, the medium holding body 110 is the second one. The supply hole 132 and the second guide member 142 may not be provided.

  As described above, the medium holding body 110 promotes the discharge of the water M filled between the subject S and the subject facing surface 111 by providing the longitudinal groove 150 on the subject facing surface 111. be able to. As a result, the flow rate of the water M filled in the medium holder 110 between the subject S and the subject facing surface 111 is increased. Therefore, the medium holding body 110 can promote the removal of bubbles contained in the water M filled between the subject S and the subject facing surface 111 without increasing the flow rate of the supplied water M. it can.

  The longitudinal groove 150 is configured to include the first longitudinal groove 151 and the second longitudinal groove 152 along the longitudinal direction of the through-hole 120. However, the longitudinal groove 150 is the object facing surface. If it is formed in 111, the direction in which it is formed and the number to be formed are not limited.

  However, when the longitudinal groove 150 is formed along the flow of the water M, the water M is discharged from the longitudinal groove 150 along the flow of the water M, so that the discharge of the water M is promoted. Therefore, when the longitudinal groove 150 is formed along the flow direction of the water M, that is, along the longitudinal direction of the through-hole 120, the discharge of the water M can be promoted.

  Further, in the medium holding body 110, for example, the longitudinal groove 150 may be formed only on one side in the longitudinal direction of the through hole 120. Even in this case, the flow rate of the water M on one side in the longitudinal direction of the through hole 120 increases in the medium holding body 110. Thereby, the medium holding body 110 can promote the removal of bubbles contained in the water M on one side in the longitudinal direction of the through hole 120.

  However, in the medium holding body 110, the longitudinal grooves 150 are formed on both sides of the through hole 120 in the longitudinal direction, so that the flow rate of the water M on the other side in the longitudinal direction of the through hole 120 is also increased. Therefore, the medium holding body 110 can promote the removal of bubbles contained in the water M on both sides in the longitudinal direction of the through hole 120 by forming the longitudinal grooves 150 on both sides in the longitudinal direction of the through hole 120. it can.

(Modification 1)
FIG. 4 is a perspective view showing the configuration of the medium holding body of the first modification. The longitudinal groove 150 shown in FIG. 2 has been described as being formed by cutting the medium holding body 110 from the object-facing surface 111 to the ultrasonic element mounting surface 112 side. It is not limited.

  Here, among the surfaces of the medium holding body 210 of the first modification, the surfaces other than the object facing surface 111, the ultrasonic element mounting surface 112, the first side surface 113, and the second side surface 114 are the third side surface 115 and the fourth surface. Let it be the side surface 116. The third side surface 115 and the fourth side surface 116 are side surfaces of the medium holding member 210 when the object facing surface 111 and the ultrasonic element mounting surface 112 of the medium holding member 110 are the upper surface and the bottom surface. It is a surface along the longitudinal direction.

  As shown in FIG. 4, the longitudinal groove 250 is formed by attaching the first tape 251 and the second tape 252 to the object facing surface 111. The first tape 251 is affixed along the longitudinal direction of the through hole 120 to the object facing surface 111 on the third side surface 115 side on both sides of the through hole 120. The second tape 252 is attached along the longitudinal direction of the through-hole 120 to the subject-facing surface 111 on the fourth side surface 116 side on both sides of the through-hole 120.

  As a result, the through hole 120 is disposed between the first tape 251 and the second tape 252 that are attached to the subject facing surface 111 along the longitudinal direction of the through hole 120. The dimension of the 1st tape 251 and the 2nd tape 252 of the penetration direction of the through-hole 120, ie, the thickness of the 1st tape 251 and the 2nd tape 252 is 0.27 mm, for example.

  Even when the medium holding member 210 includes the longitudinal groove 250 shown in FIG. 4, the water M overflowing from the through hole 120 is positively discharged from the longitudinal groove 250. Thereby, the medium holding | maintenance body 210 can raise the flow velocity of the water M and can accelerate | stimulate the removal of the bubble contained in the water M similarly to the case where the longitudinal direction groove | channel 150 shown in FIG.

  Furthermore, the groove can be easily formed by attaching the first tape 251 and the second tape 252 to the object facing surface 111 rather than cutting the object facing surface 111. Further, the first tape 251 and the second tape 252 can be easily replaced.

  For example, if the operator of the ultrasonic flaw detector 100 determines that the depth of the longitudinal groove 250 should be changed, the first tape 251 and the second tape 252 currently in use are replaced with a tape having a different thickness. Thus, the operator can easily change the depth of the longitudinal groove 250.

  Here, the first tape 251 and the second tape 252 are stretched on a part of the object facing surface 111. Therefore, the distance between the medium holder 210 and the subject S on the subject-facing surface 111 excluding the through-hole 120 is equal to the portion where the first tape 251 and the second tape 252 are stretched and the first tape 251. And the portion where the second tape 252 is not stretched.

  Thereby, as shown in FIG. 1, the medium holder 210 has a portion where the first tape 251 and the second tape 252 are not stretched when the medium holder 210 moves along the surface of the subject S, That is, there is a possibility that the portion on the third side surface 115 and the fourth side surface 116 side of the object facing surface 111 may rattle. Therefore, as shown in FIG. 4, for example, four auxiliary tapes 253 are attached to the medium holder 210 in addition to the first tape 251 and the second tape 252.

  The auxiliary tape 253 is attached to a portion of the subject facing surface 111 where the first tape 251 and the second tape 252 are not stretched. Specifically, the auxiliary tape 253 is attached to the subject facing surface 111 on the third side surface 115 side of the first tape 251 and the subject facing surface 111 on the fourth side surface 116 side of the second tape 252. . Thereby, the medium holder 210 can suppress the risk of rattling when the medium holder 210 moves along the surface of the subject S.

  However, the medium holder 210 does not necessarily include the auxiliary tape 253. For example, the medium holder 210 may not include the auxiliary tape 253 if the medium holder 210 moves within the surface of the subject S within an allowable range.

  Even if the auxiliary tape 253 is not provided, the dimensions of the first tape 251 and the second tape 252 in the direction connecting the third side surface 115 and the fourth side surface 116, that is, the widths of the first tape 251 and the second tape 252 are set. Also by increasing, the medium holding body 210 can suppress the risk of rattling when the medium holding body 210 moves along the surface of the subject S.

(Modification 2)
FIG. 5 is a perspective view showing the configuration of the medium holding body of the second modification. The medium holder 310 of the second modification shown in FIG. 5 is characterized in that the guide member 140 is not provided. The medium holder 310 includes a first supply hole 331 and a second supply hole 332. The first supply hole 331 and the second supply hole 332 are formed along the longitudinal direction of the through hole 120.

  In the first supply hole 331, an inlet 331a that is one end portion opens to the first side surface 113, and an outlet 331b that is the other end portion opens to the inner wall surface of the through hole 120 on the first side surface 113 side. Here, the portion of the through hole 120 where the outlet 331b is formed is an end portion of the through hole 120 in the longitudinal direction. Further, in the present embodiment, the first supply hole 131 is formed substantially parallel to the object facing surface 111.

  The first supply hole 331 is formed in a portion of the medium holding body 110 on the object facing surface 111 side in the through direction of the through hole 120. Note that the portion of the through hole 120 on the subject facing surface 111 side in the penetrating direction is a portion on the subject facing surface 111 side of the center of the through hole 120 of the medium holding body 110 in the penetrating direction.

  In the second supply hole 332, an inlet 332 a that is one end portion opens to the second side surface 114, and an outlet 332 b that is the other end portion opens to the inner wall surface of the through hole 120 on the second side surface 114 side. Here, the portion of the through hole 120 where the outlet 332b is formed is an end portion of the through hole 120 in the longitudinal direction. In the present embodiment, the second supply hole 332 is formed substantially parallel to the object facing surface 111.

  The second supply hole 332 is formed in a portion of the medium holding body 110 on the ultrasonic element mounting surface 112 side in the through direction of the through hole 120. The portion on the ultrasonic element attachment surface 112 side in the penetration direction of the through hole 120 is a portion closer to the ultrasonic element attachment surface 112 than the center of the through hole 120 of the medium holding body 110 in the penetration direction.

  With this configuration, when water M is supplied from the first supply hole 331 into the through hole 120, the water M injected from the first supply hole 331 into the through hole 120 passes through the object facing surface 111 side. The inside of the hole 120 flows in the longitudinal direction of the through hole 120.

  As a result, the medium holder 310 can increase the flow rate of the water M on the object facing surface 111 side where bubbles tend to accumulate without increasing the flow rate of the water M supplied to the through-hole 120. Therefore, the medium holding body 310 can promote the elimination of bubbles contained in the water M while suppressing an increase in the required flow rate of the water M.

  Further, when the water M is supplied from the second supply hole 332 into the through hole 120, the water M injected from the second supply hole 332 into the through hole 120 is passed through the through hole on the ultrasonic element mounting surface 112 side. The inside of 120 flows in the longitudinal direction of the through hole 120.

  As a result, the medium holder 310 can increase the flow rate of the water M on the ultrasonic unit 170 side where fine bubbles tend to accumulate. Therefore, the medium holding member 310 can exclude fine bubbles that tend to stay on the ultrasonic unit 170 side of the through hole 120 from the ultrasonic unit 170 side.

  As described above, the medium holding body 310 can promote the elimination of bubbles without including the guide member 140 shown in FIGS. 2, 3, and 4. Thereby, the medium holding body 310 can reduce the number of necessary parts as compared with the case where the guide member 140 is provided.

(Modification 3)
FIG. 6 is a perspective view showing the configuration of the medium holding body of the third modification. In the medium holding body 410 of Modification 3 shown in FIG. 6, the first supply hole 431 and the second supply hole 432 that supply the water M to the through hole 120 are formed with an angle with respect to the object facing surface 111. There is a feature. The first supply hole 431 and the second supply hole 432 are formed along the longitudinal direction of the through hole 120.

  In the first supply hole 431, an inlet 431 a that is one end portion opens to the first side surface 113, and an outlet 431 b that is the other end portion opens to the inner wall surface of the through hole 120 on the first side surface 113 side. Here, the portion of the through hole 120 where the outlet 431 b is formed is an end portion of the through hole 120 in the longitudinal direction. The first supply hole 431 is formed with an angle with respect to the subject facing surface 111 so as to be closer to the subject facing surface 111 as it is farther from the first side surface 113 toward the through hole 120.

  In the second supply hole 432, an inlet 432 a that is one end portion opens to the second side surface 114, and an outlet 432 b that is the other end portion opens to the inner wall surface of the through hole 120 on the second side surface 114 side. Here, the portion of the through hole 120 where the outlet 432b is formed is an end portion of the through hole 120 in the longitudinal direction. The second supply hole 432 is formed with an angle with respect to the object facing surface 111 so that the second supply hole 432 is closer to the ultrasonic element mounting surface 112 as it is farther from the second side surface 114 toward the through hole 120.

  With this configuration, when water M is supplied from the first supply hole 431 into the through-hole 120, the water M injected from the first supply hole 431 into the through-hole 120 is directed toward the object facing surface 111. Flowing. The water M flowing toward the subject facing surface 111 strikes the surface of the subject S and flows along the surface of the subject S toward the second longitudinal groove 152.

  As a result, the medium holding body 410 increases the flow rate of the water M on the subject S side where bubbles tend to accumulate without increasing the flow rate of the water M supplied to the through-hole 120. Therefore, the medium holding body 110 can promote the elimination of bubbles contained in the water M while suppressing an increase in the required flow rate of the water M.

  Further, when water M is supplied from the second supply hole 432 into the through hole 120, the water M sprayed into the through hole 120 from the second supply hole 432 is directed toward the ultrasonic element mounting surface 112 side. Flowing. The water M flowing toward the ultrasonic element mounting surface 112 hits the surface of the ultrasonic unit 170 and flows toward the first side surface 113 along the surface of the ultrasonic unit 170.

  Thereby, the medium holding | maintenance body 410 can raise the flow velocity of the water M by the side of the ultrasonic unit 170 in which a fine bubble tends to accumulate. Therefore, the medium holding body 110 can exclude fine bubbles that tend to stay on the ultrasonic unit 170 side of the through hole 120 from the ultrasonic unit 170 side.

  As described above, the medium holding body 310 can promote the elimination of bubbles without including the guide member 140 shown in FIGS. 2, 3, and 4. Thereby, the medium holding body 310 can reduce the number of necessary parts as compared with the case where the guide member 140 is provided.

(Embodiment 2)
FIG. 7 is a perspective view illustrating a configuration of a medium holding body according to the second embodiment. In the medium holding body 510 according to the second embodiment shown in FIG. 7, the first supply hole 531 and the second supply hole 532 that supply the water M to the through hole 120 are provided between one side and the other side in the longitudinal direction of the through hole 120. It is characterized in that it is formed on both sides along a direction intersecting the longitudinal direction of the through hole 120. The medium holder 510 is also characterized in that the first central groove 553 and the second central groove 554 are formed on the object facing surface 111.

  Unlike the supply holes shown in FIGS. 1 to 6, the first supply hole 531 and the second supply hole 532 intersect with the longitudinal direction of the through hole 120, specifically, the third side surface 115 and the fourth side surface 116. Are formed in the medium holding body 510 along the direction connecting the two.

  The first supply hole 531 is formed in a portion closer to the first side surface 113 than the central portion in the longitudinal direction of the through hole 120. In the first supply hole 531, an inlet 531 a that is one end portion opens to the third side surface 115, and an outlet 531 b that is the other end portion opens to the inner wall surface of the through hole 120 on the third side surface 115 side.

  The second supply hole 532 is formed in a portion closer to the second side surface 114 than the central portion in the longitudinal direction of the through hole 120. In the second supply hole 532, an inlet 532 a that is one end portion opens to the fourth side surface 116, and an outlet 532 b that is the other end portion opens to the inner wall surface on the fourth side surface 116 side of the through hole 120.

  The first center groove 553 and the second center groove 554 are the medium holder 110 along the direction intersecting the longitudinal direction of the through hole 120, specifically, the direction connecting the third side surface 115 and the fourth side surface 116. Formed. In addition, the depth of the 1st center part groove | channel 553 and the 2nd center part groove | channel 554 is the same depth as the 1st longitudinal direction groove | channel 151 and the 2nd longitudinal direction groove | channel 152, for example.

  The first central groove 553 is formed in the object facing surface 111 on the first side surface 113 side with respect to the central portion in the longitudinal direction of the through hole 120. The first center groove 553 has one end opening in the third side surface 115 and the other end opening in the inner wall surface of the through hole 120 on the third side surface 115 side.

  The second central groove 554 is formed in the object facing surface 111 on the second side surface 114 side of the central portion in the longitudinal direction of the through hole 120. The second center groove 554 has one end opening on the fourth side surface 116 and the other end opening on the inner wall surface of the through hole 120 on the fourth side surface 116 side.

  With this configuration, when the water M is supplied into the through hole 120 from the first supply hole 531 and the second supply hole 532, the water M injected into the through hole 120 from the first supply hole 531 It hits the inner wall surface of the through hole 120 on the fourth side surface 116 side. Further, the water M sprayed into the through hole 120 from the second supply hole 532 hits the inner wall surface of the through hole 120 on the third side face 115 side. Accordingly, the direction of flow of the water M sprayed into the through hole 120 from the first supply hole 531 and the second supply hole 532 is changed in the longitudinal direction of the through hole 120.

  The water M supplied from the first supply hole 531 mainly flows toward the second supply hole 532. On the other hand, the water M supplied from the second supply hole 532 mainly flows toward the first supply hole 531. Therefore, the water M supplied from the first supply hole 531 and the water M supplied from the second supply hole 532 collide with each other at the longitudinal center of the through hole 120.

  Here, when the first central groove 553 and the second central groove 554 are not formed in the object facing surface 111, the water M supplied from the first supply hole 531 and the water supplied from the second supply hole 532 are used. Due to the collision with M, the flow velocity of the water M decreases at the center in the longitudinal direction of the through hole 120. However, in the medium holding member 510, the first central groove 553 and the second central groove 554 are formed in the central portion of the through hole 120 in the longitudinal direction.

  Therefore, in the medium holding body 510, the discharge of the water M is promoted by the first central groove 553 and the second central groove 554 at the central portion in the longitudinal direction of the through hole 120. As a result, the medium holder 510 increases the flow rate of the water M at the center in the longitudinal direction of the through hole 120. Therefore, the medium holding body 510 can promote the elimination of bubbles contained in the water M at the central portion in the longitudinal direction of the through hole 120, which is a portion where bubbles are likely to accumulate.

  In the medium holder 510, the first supply hole 531 is formed on the third side surface 115 side with respect to the through hole 120, and the second supply hole 532 is formed on the fourth side surface 116 side with respect to the through hole 120. The configurations of the first supply hole 531 and the second supply hole 532 are not limited to this. For example, both the first supply hole 531 and the second supply hole 532 may be provided closer to the third side face 115 than the through hole 120, or both may be provided closer to the fourth side face 116 than the through hole 120. Good.

(Embodiment 3)
FIG. 8 is a perspective view illustrating a configuration of a medium holding body according to the third embodiment. The medium holding body 610 of Embodiment 3 shown in FIG. 8 is characterized in that water M is supplied from the central portion in the longitudinal direction of the through hole 120. The medium holding member 610 includes a first supply hole 631 and a second supply hole 632. The first supply hole 631 and the second supply hole 632 are formed in a direction intersecting the longitudinal direction of the through hole 120 at the center in the longitudinal direction of the through hole 120, specifically, the third side surface 115 and the fourth side surface 116. It is formed along the direction connecting the two.

  In the first supply hole 631, the inlet 631 a that is one end portion opens in the center portion in the longitudinal direction of the through hole 120 in the portion of the third side surface 115, and the outlet 631 b that is the other end portion is the through hole 120. Of the inner wall surface on the third side surface 115 side, the through hole 120 opens in the center in the longitudinal direction.

  In the second supply hole 632, the inlet 632 a that is one end portion opens in the center portion in the longitudinal direction of the through hole 120 in the portion of the fourth side surface 116, and the outlet 632 b that is the other end portion is the through hole 120. Of the inner wall surface on the fourth side surface 116 side, the through hole 120 opens in the center in the longitudinal direction. The first supply hole 631 and the second supply hole 632 face each other in the direction connecting the third side surface 115 and the fourth side surface 116.

  With this configuration, when water M is supplied into the through hole 120 from the first supply hole 631 and the second supply hole 632, the water M supplied to the through hole 120 is supplied from the central portion in the longitudinal direction of the through hole 120. It flows toward the first side surface 113 and the second side surface 114 side. Thereby, the flow velocity of the water M in the central portion in the longitudinal direction of the through hole 120 is faster than the flow velocity of the water M other than the central portion. Therefore, the medium holding body 610 can promote the removal of bubbles contained in the water M at the center portion in the longitudinal direction of the through hole 120, which is a portion where bubbles are likely to accumulate.

  The medium holder 610 may not include both the first supply hole 631 and the second supply hole 632. The medium holding body 610 may include only one of the first supply hole 631 and the second supply hole 632 as long as the medium M is supplied from the central portion of the through hole 120. Further, in the medium holding body 610, for example, both the first supply hole 631 and the second supply hole 632 may be provided closer to the third side surface 115 than the through hole 120, or both are fourth than the through hole 120. It may be provided on the side surface 116 side.

(Embodiment 4)
FIG. 9 is a perspective view illustrating a configuration of a medium holding body according to the fourth embodiment. The medium holder 710 of Embodiment 4 shown in FIG. 9 is characterized in that the water M is supplied only from one side in the longitudinal direction of the through hole 120. The medium holding body 710 includes a first supply hole 731 and a second supply hole 732.

  The first supply hole 731 and the second supply hole 732 are on one side in the longitudinal direction of the through hole 120, for example, on the first side surface 113 side, in a direction intersecting the longitudinal direction of the through hole 120, specifically, in the third direction. It is formed along the direction connecting the side surface 115 and the fourth side surface 116. The first side surface 113 side in the longitudinal direction of the through hole 120 is closer to the first side surface 113 side than the central portion in the longitudinal direction of the through hole 120.

  In the first supply hole 731, the inlet 731 a which is one end portion opens on the first side surface 113 side in the longitudinal direction of the through hole 120 in the portion of the third side surface 115, and the outlet 731 b which is the other end portion is provided. Of the inner wall surface on the third side surface 115 side of the through hole 120, the through hole 120 opens to the first side surface 113 side in the longitudinal direction.

  In the second supply hole 732, the inlet 732 a that is one end portion opens on the first side surface 113 side in the longitudinal direction of the through hole 120 in the portion of the fourth side surface 116, and the outlet 732 b that is the other end portion is provided. Of the inner wall surface on the fourth side surface 116 side of the through hole 120, the through hole 120 opens to the first side surface 113 side in the longitudinal direction. The first supply hole 731 and the second supply hole 732 oppose each other in the direction connecting the third side surface 115 and the fourth side surface 116.

  Here, as shown in FIG. 7, when water M is supplied from both sides in the longitudinal direction of the through hole 120, the water M supplied from the first supply hole 531 and the water M supplied from the second supply hole 532 are , They collide with each other at the longitudinal center of the through hole 120. Thereby, the flow velocity of the water M in the central portion in the longitudinal direction of the through hole 120 is decreased.

  However, in the medium holding body 710 shown in FIG. 9, when the water M is supplied into the through hole 120 from the first supply hole 731 and the second supply hole 732, the water M supplied to the through hole 120 has the above configuration. Flows from the first side surface 113 side in the longitudinal direction of the through hole 120 toward the second side surface 114 side. Therefore, the water M does not collide with the central portion of the through hole 120 in the longitudinal direction.

  Thereby, the medium holding body 710 reduces the decrease in the flow rate of the water M at the central portion of the through hole 120. Therefore, the medium holding body 710 can promote the elimination of the bubbles contained in the water M at the central portion in the longitudinal direction of the through hole 120, which is a portion where bubbles are likely to accumulate.

  Note that the medium holder 710 may not include both the first supply hole 731 and the second supply hole 732. The medium holding body 710 may include only one of the first supply hole 731 and the second supply hole 732 as long as the medium M is supplied from the central portion of the through hole 120. Further, in the medium holding body 710, for example, both the first supply hole 731 and the second supply hole 732 may be provided on the third side surface 115 side with respect to the through hole 120, and both are fourth than the through hole 120. It may be provided on the side surface 116 side.

  FIG. 10 is a perspective view illustrating a configuration of another medium holding body. The shape of the medium holding body is not limited to a rectangular parallelepiped. For example, as shown in FIG. 10, the medium holding body 810 may be formed in a columnar shape. The medium holder 810 includes an object facing surface 811, an ultrasonic element mounting surface 812, a through hole 820, a supply hole 830, and a longitudinal groove 850. The medium holder 810 has the same configuration except for the shape of the medium holder 110 and the medium holder shown in FIG. Therefore, only the characteristic part of the medium holder 810 will be described.

  The object facing surface 811 is the upper surface of the medium holder 810 formed in a columnar shape, and the ultrasonic element mounting surface 812 is the bottom surface of the medium holder 810. The through hole 820 passes through the subject facing surface 811 and the ultrasonic element mounting surface 812.

  In the supply hole 830, an inlet that is one end portion opens to the side peripheral portion of the medium holding body 810, and an outlet that is the other end portion opens to the through hole 820. The longitudinal groove 850 is formed in the object facing surface 811. One end of the longitudinal groove 850 opens to the side periphery of the medium holding member 810, and the other end opens to the through hole 820.

  Even in such a configuration, the medium holder 810 has the longitudinal groove 850 formed in the subject-facing surface 811, so that the discharge of the water M supplied from the supply hole 830 is promoted. Thereby, the bubbles contained in the water M are easily discharged together with the water M. As described above, the medium holding body 810 can promote the elimination of bubbles.

  As shown in FIG. 1, the medium holding body may be arranged so that the subject facing surface 111 faces the subject S from the lower side in the vertical direction of the subject S, or the vertical direction of the subject S. The subject facing surface 111 may be disposed so as to face the subject S from above. Further, the medium holding body may be arranged such that the subject facing surface 111 faces the subject S from the horizontal direction.

  The ultrasonic flaw detection apparatus according to the present invention is useful for techniques for flaw detection using ultrasonic waves, and is suitable for promoting the elimination of bubbles contained in a medium.

It is sectional drawing which cuts and shows a mode that an ultrasonic flaw detector is flawed by the surface along the penetration direction of a through-hole. 3 is a perspective view illustrating a configuration of a medium holding body according to Embodiment 1. FIG. It is a perspective view which shows the structure by which a 2nd longitudinal direction groove | channel is formed in a part of 2nd guide member. FIG. 10 is a perspective view illustrating a configuration of a medium holding body according to Modification 1. FIG. 10 is a perspective view illustrating a configuration of a medium holding body according to Modification 2. FIG. 10 is a perspective view illustrating a configuration of a medium holder according to Modification 3. 6 is a perspective view illustrating a configuration of a medium holding body according to Embodiment 2. FIG. 6 is a perspective view illustrating a configuration of a medium holding body according to Embodiment 3. FIG. FIG. 6 is a perspective view illustrating a configuration of a medium holding body according to a fourth embodiment. It is a perspective view which shows the structure of another medium holding body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Ultrasonic flaw detector 110-810 Medium holding body 111,811 Subject opposing surface 112,812 Ultrasonic element attachment surface 120,820 Through-hole (medium holding chamber)
130, 830 Supply hole (medium supply means)
131, 331, 431, 531, 631, 731 First supply hole 132, 332, 432, 532, 632, 732 Second supply hole 140 Guide member 141 First guide member 142 Second guide member 150, 250, 850 Longitudinal direction Groove
151 First Longitudinal Groove 152 Second Longitudinal Groove 170 Ultrasonic Unit 171 Ultrasonic Element 180 Medium Supply Hose 181 First Medium Supply Hose 182 Second Medium Supply Hose 190 Controller 191 Calculation Unit 192 Display Unit 251 First Tape 252 Second tape 253 Auxiliary tape 553 First central groove 554 Second central groove M Water (medium)
S subject

Claims (13)

An ultrasonic element capable of transmitting an ultrasonic wave toward the subject and receiving the ultrasonic wave reflected by the subject;
A medium holder that is disposed between the ultrasonic element and the subject and holds a medium that transmits the ultrasonic wave;
With
The medium holder is
A subject-facing surface facing the subject;
A medium holding chamber that opens to the object-facing surface and stores the medium;
Medium supply means for supplying the medium to the medium holding chamber;
A groove formed on the object-facing surface and communicating between the medium holding chamber and the outside of the medium holding chamber;
An ultrasonic flaw detector characterized by comprising. The medium holding chamber has a long shape in a direction along the object facing surface,
The ultrasonic flaw detector according to claim 1, wherein the groove is formed at an end portion in a longitudinal direction of the medium holding chamber and is formed along the longitudinal direction. The groove is formed with at least two of a first groove and a second groove,
The first groove opens at an end portion on one side in the longitudinal direction of the medium holding chamber,
The ultrasonic flaw detector according to claim 2, wherein the second groove opens at an end of the medium holding chamber on the other side in the longitudinal direction. The medium holding chamber has a long shape in a direction along the object facing surface,
4. The medium supply unit according to claim 1, wherein the medium supply unit is a hole that opens at an end portion in a longitudinal direction of the medium holding chamber and is formed along the longitudinal direction. The ultrasonic flaw detector described in 1.   The medium supply means includes a guide member that is provided in a portion that opens to the medium holding chamber and changes the flow of the medium flowing out of the medium supply means toward the object facing surface. 4. The ultrasonic flaw detector according to 4.   The ultrasonic flaw detection apparatus according to claim 4, wherein the medium supply unit is formed along the subject facing surface while opening to the subject facing surface side of the medium holding chamber.   The ultrasonic flaw detection apparatus according to claim 4, wherein the medium supply unit is formed to be inclined in a direction approaching the subject facing surface side toward the medium holding chamber. The medium supply means is provided with at least two of a first medium supply means and a second medium supply means,
The ultrasonic flaw detector is
A first guide member, wherein the first medium supply means is provided in a portion that opens to the medium holding chamber, and changes the flow of the medium flowing out of the first medium supply means toward the object-facing surface;
A second guide member provided in a portion where the second medium supply means opens in the medium holding chamber, and changes the flow of the medium flowing out from the second medium supply means to the ultrasonic element side;
The ultrasonic flaw detector according to claim 4, comprising: The medium supply means is provided with at least two of a first medium supply means and a second medium supply means,
The first medium supply means opens to the object facing surface side of the medium holding chamber and is formed along the object facing surface,
The ultrasonic flaw detector according to claim 4, wherein the second medium supply unit is formed along the object facing surface while opening to the ultrasonic element side of the medium holding chamber. The medium supply means is provided with at least two of a first medium supply means and a second medium supply means,
The first medium supply means is formed to be inclined in a direction approaching the object facing surface side toward the medium holding chamber,
The ultrasonic flaw detection apparatus according to claim 4, wherein the second medium supply unit is formed to be inclined in a direction approaching the ultrasonic element side toward the medium holding chamber. The medium holding chamber has a long shape in a direction along the object facing surface,
The medium supply means is a hole provided along both sides of one side and the other side in the longitudinal direction of the medium holding chamber and formed along a direction intersecting the longitudinal direction,
4. The central groove that communicates the central portion in the longitudinal direction of the medium holding chamber and the outside of the medium holding chamber is formed in the object facing surface. The ultrasonic flaw detector as described in any one of Claims. The medium holding chamber has a long shape in a direction along the object facing surface,
4. The medium supply unit according to claim 1, wherein the medium supply unit is a hole provided in a central portion in a longitudinal direction of the medium holding chamber and formed along a direction intersecting the longitudinal direction. The ultrasonic flaw detector as described in any one of Claims. The medium holding chamber has a long shape in a direction along the object facing surface,
The medium supply means is a hole that is provided only on one side in the longitudinal direction of the medium holding chamber and is formed along a direction intersecting the longitudinal direction. The ultrasonic flaw detector according to any one of the above.

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