JP4758404B2 - Foreign material recovery device - Google Patents

Description

  The present invention relates to a foreign matter suction and recovery device, and more particularly to a foreign matter collection device for collecting foreign matter at a portion where a person cannot enter, such as an upper portion of a fuel rod container of a nuclear power plant.

  If foreign matter is found in the upper part of the fuel rod container of a nuclear power plant, in order to collect it, conventionally, the submersible pump, strainer, and suction part are connected with a hose, submerged in the fuel pool, and the suction part using an operation pole etc. Was collected near the top of the fuel rod container.

  Such conventional foreign matter collection work is a work that requires skill to operate the suction unit remotely and requires a lot of labor for preparation work, collection work, and cleaning up, so that foreign matter collection is simple and easy to handle. A device was sought. In order to solve the above problem, the applicant of the present invention has integrated a container having a submersible pump, a strainer, and a suction part, and further provided a guide for storing a fuel rod container handle part in the suction part. A device has been devised in which the handle of the rod container is attached to the upper part of the fuel rod container using a handle (Patent Document 1).

  However, in this system, since the suction portion of the apparatus is located below the fuel rod handle guide (FIG. 4 of Patent Document 1), the suction portion is inserted during the operation of inserting the fuel rod handle portion into the fuel rod handle guide. There is a concern that the handle may be damaged by being brought into contact with the handle.

The foreign matter suction and recovery device described in Patent Document 1 is suspended and used on a fuel exchange platform by a permanent auxiliary hoist. After the suspension, the fuel rod handle storage guide is aligned with the fuel handle, and an operation pole or the like is used. The operation of rotating the foreign matter suction and recovery device required skill. Further, it is possible to manually hold and rotate the auxiliary hoist wire for suspending the foreign matter suction and recovery device from above, but since such a wire is thin, a considerable amount of labor is actually required.
JP 2006-284302 A

  Accordingly, the present invention has an object to provide a foreign matter suction and recovery device that overcomes the above-mentioned drawbacks of the foreign matter suction and recovery device, is simpler and easier to handle, and significantly reduces the possibility of damaging the fuel rod. Is. It is another object of the present invention to provide a jig that can easily operate the foreign matter suction and recovery device when the foreign matter suction and recovery device is suspended from a fuel exchange platform by a permanent auxiliary hoist.

  The present invention solves the above-described problem, and includes a suction pipe that can be attached to a submersible pump for suction via a recovery strainer, a suction portion provided at a tip of the suction pipe, and an axial slide on the suction pipe. A foreign matter collecting apparatus including a handle storage guide that is movably mounted and capable of storing a fuel rod container handle portion therein, wherein the handle storage guide regulates sliding of the handle storage guide and is arbitrarily The foreign matter collecting apparatus is characterized in that a lock portion that is locked at a position and that is unlocked when the fuel rod container handle portion is housed in the handle housing guide is connected.

  That is, in the foreign material recovery apparatus of the present invention, the handle storage guide is attached to the suction pipe so as to be slidable in the axial direction, and before the handle portion of the fuel rod container is stored in the handle storage guide, the handle storage guide Is positioned below the suction portion, so that the fuel rod container handle portion can be operated without worrying about damaging the handle portion when inserted into the handle storage guide.

  In addition, the foreign matter collecting apparatus of the present invention includes a lock portion that can be locked at an arbitrary position by restricting sliding of the handle storage guide, and the lock storage portion is lower than the suction portion. When the fuel rod container handle is securely stored in the handle storage guide, the lock is released only when the lock is applied. Therefore, the suction part can be reliably attached to the upper part of the fuel rod container.

  Furthermore, in the foreign material recovery apparatus of the present invention, the suction pipe provided with a stopper that restricts the sliding of the handle storage guide in the axial direction is the lower limit of the lowering of the suction pipe and the suction portion with respect to the handle storage guide. Therefore, there is no possibility that the foreign matter collecting device is mistakenly lowered and the fuel rod or the like is damaged.

  Furthermore, the foreign matter collecting apparatus operating jig of the present invention sandwiches an auxiliary hoist wire that suspends the foreign matter collecting apparatus between two pressing plates, and grips a handle provided on the pressing plate to easily rotate the wire. Therefore, the foreign material recovery apparatus can be easily operated remotely.

  Hereinafter, embodiments of the foreign matter collecting apparatus and the foreign matter collecting apparatus operating jig of the present invention will be specifically described with reference to the drawings. Note that the present invention is not limited to these embodiments.

  1 and 2 are both side views of the foreign material recovery apparatus according to the present invention, FIGS. 3 and 4 are both front views of the foreign material recovery apparatus according to the present invention, and FIG. 5 is a foreign object according to the present invention. It is a bottom view of a recovery device. In the figure, 1 is a suction pipe, 2 is a pipe guide, 3 is a lock section, 4 is a handle storage guide, 11 is a suction section, 12 is a stopper, 13 is a stopper, 14 is a locking recess, and 41 is a handle storage guide opening. , 42 is a storage guide hole, 111 is a suction opening, and 7 is a recovery strainer.

  As shown in FIGS. 1 to 4, the cylindrical suction pipe 1 is suspended from the bottom surface of a recovery strainer 7 connected to a suction submersible pump (not shown). The suction pipe 1 is provided with a suction portion 11 at its tip, and a stopper 13 is provided on the upper portion of the suction portion 11 so as to protrude from the peripheral wall of the suction pipe 1. Further, a stopper 12 protrudes from the peripheral wall of the suction pipe 1 on the collection strainer 7 side of the suction pipe 1, and a cylindrical pipe guide 2 is slidable in the axial direction with respect to the suction pipe 1 between the stopper 12 and the stopper 13. It is wrapped in. A lock portion 3 is provided on the front surface of the pipe guide 4, and a handle storage guide 4 is provided below the pipe guide 4 so as to be connected to the lock portion 3.

  The pipe guide 2 only needs to have a shape that can be attached to the suction pipe 1. For example, as shown in FIG. 6, a groove 21 is formed on the inner peripheral surface of the pipe guide 2, and the suction pipe 1 is fitted into the groove 21. It is preferable to form a matable rib and spline-fit each other, because the pipe guide 2 does not rotate relative to the suction pipe 1 when sliding.

  The handle storing guide 4 is provided with two members formed in a U-shaped cross section at the lower part of the pipe guide 2 with their concave portions facing each other inward, and the lower half of the U-shaped member. The skirt is shaped like a skirt. A handle storage guide opening 41 is provided at the lower end, and the fuel rod container handle is inserted into the handle storage guide 4 from here. Since the handle storage guide opening 41 is formed in a skirt shape with the handle storage guide 4, the opening is considerably wide with respect to the fuel rod container handle. Therefore, the fuel rod handle can be easily inserted even by remote control. can do. Further, a hole portion 42 communicating with the inside of the lock portion 3 is formed on the ceiling surface in the handle storage guide 4.

  FIG. 7 is a partially cutaway side view showing the internal structure of the lock portion 3. As shown in the drawing, a lock pin 31 is slidably provided in the axial direction inside the lock portion 3, and the lower end of the lock pin 31 is formed with a hole 35 and a hole formed in the lower portion of the lock portion 3. The handle storage guide 4 is provided so as to protrude into the handle storage guide 4 from the hole 42 of the handle storage guide 4 communicating with the portion 35. Further, the upper end of the lock pin 31 protrudes to the outside through a hole 36 formed in the upper part of the lock part 3. The lock pin 31 has an upper portion 311 formed with a larger outer diameter than the lower portion 313, and a tapered portion 312 is formed between the upper portion 311 and the lower portion 313. Further, a flange 315 is formed on the upper portion 311 in the vicinity of the taper portion 312, and a spring 33 is provided between the flange 315 and the hole portion 36 to urge the lock pin 31 downward. ing.

  In addition, a holding hole portion 34 communicating with the inside of the lock portion is formed on the peripheral wall of the lock portion 3 and in contact with the suction pipe 1, and a lock ball 32 is loosely fitted in the holding hole portion 34. ing. In the state of FIG. 7, the lock pin 31 is biased by the spring 33 and is in the lowest position, and the lock ball 34 is in contact with the outer peripheral surface of the upper portion 311 of the lock pin 31. In this state, since the distance from the outer peripheral surface of the upper portion 311 to the outer peripheral wall of the lock portion 3 is formed to be smaller than the diameter of the lock ball 34, the lock ball 34 is moved toward the suction pipe 1 by the lock pin 31. When pressed, a part thereof protrudes from the outside of the lock portion 3. Then, the protruding lock ball 34 engages with a locking recess 14 provided on the outer peripheral surface of the suction pipe 1. In this state, the lock is applied, and the sliding of the handle storing guide 4 connected to the lock portion 3 in the axial direction is restricted.

  Next, the operation when the lock unit 3 is unlocked and locked will be described. FIG. 8 shows a state in which the fuel rod container handle 81 is completely inserted into the handle storage guide 4. In this state, the lower end portion 314 of the lock pin 31 contacts the upper portion of the handle portion 81, and the lock pin 31 is pushed upward. At this point, the lock ball 34 is in contact with the outer peripheral surface of the lower portion 313 of the lock pin 31. The lower portion 313 of the lock pin 31 is formed to have a smaller outer diameter than the upper portion 311, and play between the outer peripheral surface of the lower portion 313 and the outer peripheral wall of the lock portion 3 with respect to the diameter of the lock ball 34. Therefore, the lock ball 34 is released from being pressed in the direction of the suction pipe 1 and stored in the lock portion 3 inside. As a result, the lock ball 34 is disengaged from the engaging recess 14 and the lock is released, and the handle storage guide 4 connected to the lock portion 3 can slide in the axial direction with respect to the suction pipe 1. .

  FIG. 9 shows a state when the lock unit 3 is locked. As shown in the figure, when the fuel rod container handle 81 is removed from the handle storage guide 4 in a state where the handle storage guide 4 is in a position where the positions of the locking recess 14 and the holding hole 34 coincide with each other, the handle 81 The lock pin 31 that has been in contact with the upper portion of the pin and pushed upward is moved downward by the urging force of the spring 33. Since the tapered portion 312 is formed on the lock pin 31, the relative position of the lock ball 34 with respect to the lock pin 31 changes from the lower portion 313 to the upper portion 311 in the process of moving the lock pin 31 downward. To do. When the position of the lock ball 34 moves from the tapered portion 312 to the upper portion 311, the lock ball 34 is pressed toward the suction pipe 1, and finally the lock pin 31 returns to the lowest position as shown in FIG. 7. Again, the lock ball 34 engages with the locking recess 14 provided on the outer peripheral surface of the suction pipe 1.

  Hereinafter, a series of operations when the foreign matter collecting apparatus of the present invention is mounted on the upper portion of the fuel rod container will be described. First, the foreign material collecting device is moved to the upper part of the fuel rod container 8 which is a target for collecting foreign materials by the hanging wire. Then, the foreign matter collecting device is lowered so that the fuel rod container handle 81 is inserted into the handle storage guide 4 (FIG. 10). Here, since the lower part of the handle storage guide 4 is formed in a skirt shape having a widened skirt, the handle storage guide 4 is finally stored in the handle storage guide 4 even if the position is slightly back and forth with respect to the handle portion 81. Can do.

  When the foreign matter collecting device is lowered and the fuel rod container handle portion 81 is completely stored in the handle storage guide 4, the lock pin 31 of the lock portion 3 is pushed upward by the handle portion 81. The lock is released. Here, since the handle storage guide 4 can slide upward with respect to the suction pipe 1, the handle storage guide 4 completely stores the handle portion 81 when the foreign matter collecting device is further lowered in this state. Only the suction pipe 1 that can slide with respect to the pipe guide 2 continues to descend further because it cannot descend further from the position. Since the stopper 12 is provided on the upper side of the suction pipe 1, the lowering of the suction pipe 1 is restricted when the lower end of the stopper 12 comes into contact with the upper end of the pipe guide 2 (see FIG. 11). Here, since the suction part 11 is appropriately arranged on the fuel rod container, the foreign matter can be recovered thereafter by operating a submersible pump for suction (not shown). The position of the stopper 12 can be arbitrarily set. However, if the suction pipe 1 is set to stop descending while leaving an appropriate space between the lower end of the suction portion 11 and the upper surface of the fuel rod, the stopper 12 It is preferable because there is no possibility of accidentally damaging the fuel rod portion by the suction portion 11.

  In order to collect the foreign matter collection device after the foreign matter collection operation is completed, first, the foreign matter collection device is pulled up by the hanging wire. At the beginning of the rise, the handle storage guide 4 does not move from the position where the handle 81 is completely stored, and the suction pipe 1 that can slide within the pipe guide 2 continues to rise. Since the stopper 13 is provided on the lower side of the suction pipe 1, the handle storage guide 4 is also lifted together with the suction pipe 1 when the upper end of the stopper 13 comes into contact with the lower end of the pipe guide 2, and the lock pin The lower end portion of 31 is separated from the upper portion of the fuel rod handle portion 81. Here, the positions of the locking recess 14 provided on the outer peripheral surface of the suction pipe 1 and the lock portion 3 holding hole portion 34 coincide with each other, and the lock pin 31 is pushed downward by the internal spring 33. The lock ball 34 engages with the locking recess 14 and the lock portion 3 is locked again.

  FIG. 12 shows a different embodiment of the suction pipe of the foreign material recovery apparatus. This suction pipe is provided with a suction part 51 at the tip of a flexible bellows-like suction pipe 5. A hose 53 is inserted into the suction pipe 5 so that the inner surface of the suction pipe 5 becomes smooth. For example, when a wire or the like is sucked, it can be prevented from being caught by the uneven portion of the bellows. Further, if a long suction pipe 5 is used, the suction part 51 side can be freely bent, and suction can be performed at various places. Furthermore, a detachable strainer 52 can be attached to the tip of the suction part 51. For example, when there is a foreign substance that cannot be lifted from the water into the air with a high dose, if the foreign substance is sucked by attaching the strainer 52, the foreign substance Is stuck to the strainer 52. Therefore, when the suction part 51 is moved in the foreign substance suction state, the suction part is inserted into a container prepared in water, and the suction is stopped, the foreign substance stuck to the strainer 52 falls and can be collected in the container in water. .

  FIG. 13 is a perspective view of a jig used for operation of the foreign matter recovery apparatus of the present invention, and FIG. 13 is a plan view of the same. In the figure, 61 is a pressing plate, 62 is a rotary pressing plate, 63 is a threaded portion, 64 is a lock nut, 611 is a handle, 621 is an engaging recess, 631 is a spot welding portion, and 9 is an auxiliary hoist wire. As shown in the figure, the holding plate 61 is provided with two screw portions 63, and a rotary pressing plate 62 is rotatably attached to one screw portion 63. A lock nut 64 is screwed to each screw portion 63, a handle 611 is provided on the holding plate 61, and a concave portion 621 that can be engaged with the screw portion 63 is provided on the rotary holding plate 62. Yes.

  The jig of the present invention is used as follows. First, the rotary presser plate 62 is rotated upward to apply the wire 9 to the groove portion 612 formed at the center of the presser plate 61. Next, the rotary presser plate 62 is rotated downward, the wire 9 is applied to the groove 622 formed in the center of the rotary presser plate 62, and the engaging concave portion 621 is engaged with the screw portion 64. Then, the two pressing plates are fixed by tightening the lock nuts 64 attached to the two screw portions 64. Since the wire 9 sandwiched between the two pressing plates can be easily rotated by swinging the handle 611 in the left-right direction, an auxiliary hoist wire that suspends the foreign matter suction / collection device is sandwiched, and the foreign matter collection device can be remotely connected. It becomes possible to operate easily.

  Since the point welding portion 631 is provided at the tip of the screw portion 63, the lock nut 64 cannot be removed from the screw portion 63. Thereby, even if the lock nut 64 is completely loosened, it does not fall off from the threaded portion 63, and it is possible to prevent foreign matters such as parts from dropping from such a jig into a fuel pool (not shown). Can do.

The side view of the foreign material collection | recovery apparatus which concerns on this invention. The side view of the foreign material collection | recovery apparatus which concerns on this invention. The front view of the foreign material collection | recovery apparatus which concerns on this invention. The front view of the foreign material collection | recovery apparatus which concerns on this invention. The bottom view of the foreign material collection | recovery apparatus which concerns on this invention. Sectional drawing of a pipe guide. The partially cutaway side view showing the internal structure of the lock portion. The partial notch side view which showed the internal state at the time of operation | movement of a lock | rock part. The partial notch side view which showed the internal state at the time of operation | movement of a lock | rock part. The side view which showed the state of operation at the time of mounting the foreign material collection | recovery apparatus of this invention in a fuel rod container upper part. The side view which showed the state of operation at the time of mounting the foreign material collection | recovery apparatus of this invention in a fuel rod container upper part. The partially notched front view which shows the thing of the different embodiment of the suction pipe of a foreign material collection | recovery apparatus. The perspective view of the jig | tool used for operation of the foreign material collection | recovery apparatus of this invention. The top view of the jig | tool used for operation of the foreign material collection | recovery apparatus of this invention.

Explanation of symbols

1 ... ... Suction pipe 2 ... ... Pipe guide 3 ... ... Lock part 4 ... ... Handle part storage guide 5 ... ... Suction pipe 6 ... ... Jig 7 ... ... Recovery strainer 8 ... ... Fuel rod container 9 ... ... Wire 11 ... ... Suction part 12 ... ... Stopper 13 ... ... Stopper 14 ... ... Locking recess 31 ... ... Lock pin 32 ... ... Lock ball 33 ... ... Spring 34 ... ... Holding hole 35 ... ... Hole 36 ... ... Hole 41 ... ... Handle Storage guide opening 42 ... Storage guide hole 42 ... ... Hole 51 ... ... Suction part 52 ... ... Strainer 53 ... ... Hose 61 ... ... Presser plate 62 ... ... Rotary presser plate 63 ... ... Screw part 64 ... ... Lock Nut 81 ... ... Fuel rod handle 311 ... ... Lock pin upper part 313 ... ... Lock pin lower part 312 ... ... Tapered part 3 4 ... ... lock pin lower end 315 ... ... flange 611 ... ... handle 612 ... ... groove 621 ... ... engaging recess 622 ... ... groove 631 ... ... the dotted weld

more than

Claims (5)

  A suction pipe that can be attached to a submersible pump for suction via a recovery strainer, a suction portion provided at the tip of the suction pipe, and a fuel rod container handle portion that is slidably mounted in the axial direction on the suction pipe. A foreign matter collecting apparatus including a handle storing guide that can be stored freely, wherein the handle storing guide is locked at an arbitrary position by restricting sliding of the handle storing guide, and is placed in the handle storing guide. A foreign matter collecting apparatus, wherein a lock portion that is unlocked when a fuel rod container handle portion is housed is continuously provided.   The lock part is loosely fitted in a holding hole provided in the peripheral wall of the lock part, and a part of the lock part protrudes from the holding hole and is freely engageable with a locking recess provided on the outer peripheral surface of the suction pipe. A lock pin, an upper portion formed with an outer diameter larger than that of the lower portion, and a lock pin provided in an axially slidable manner in contact with the lock ball, and urging the lock pin downward And a lower end portion of the lock pin is provided so as to protrude into the handle storage guide, and when the fuel rod container handle portion is stored in the handle storage guide, the lower end portion of the lock pin is The lock pin is pushed upward by coming into contact with the upper portion of the fuel rod container handle, and the engagement of the lock ball with the locking recess is released. Foreign matter recovering apparatus according to claim 1.   When the lock ball contacts the upper outer peripheral surface of the lock pin, the lock pin is pressed toward the suction pipe by the lock pin, and a part of the lock ball protrudes from the holding hole and is provided on the outer peripheral surface of the suction pipe. Engage with the locking recess, and when coming into contact with the lower outer peripheral surface of the lock pin, it is released from pressing in the suction pipe direction and is stored in the lock portion inside direction so that the engagement with the locking recess is released. The foreign matter recovery apparatus according to claim 1, wherein the foreign matter recovery apparatus is formed.   The foreign matter recovery apparatus according to any one of claims 1 to 3, wherein the suction pipe is provided with a stopper for restricting axial sliding of the handle storage guide with respect to the suction pipe.   The handle storage guide is attached to the suction pipe via a pipe guide that is axially slidably mounted on the suction pipe, and the suction pipe outer peripheral surface and the pipe guide inner peripheral surface can be fitted to each other. 5. A foreign matter collecting apparatus according to claim 1, wherein a rib and a groove are formed.

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