JP2008241604A - Sand sampling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sand sampling device capable of sampling easily sand of a deep part, even when it is a narrow location. <P>SOLUTION: This device is equipped with a cylindrical body 2 formed elongated in the vertical direction, and knocked into the sand; a core rod 3 slidably provided in the cylindrical body 2 vertically; and a sand cap 5 mounted on the lower end of the core rod 3 and formed in a bottomed cylindrical shape having an opening 4 on the upper end, wherein when the cylindrical body 2 into is inserted the sand, the opening 4 is blocked in the abutting state against the cylindrical body 2; and when it is pushed downward via the core rod 3 and then pulled up, the sand is taken in. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sand collecting device that collects deep sand from laminated sand.

  As shown in FIG. 7, an outer wall 31 is provided on the outer periphery of the reactor containment vessel 30 with a space therebetween. Between the outer wall 31 and the containment vessel 30, deformation due to a temperature change of the containment vessel 30 is provided. A sand cushion 32 for loosening is provided. The sand cushion 32 is formed by laminating several meters of dry sand in an annular sand pit 33 formed between the storage container 30 and the outer wall 31.

  By the way, the water 34 is accommodated in the storage container 30, and when the water 34 leaks from the storage container 30, the sand of the sand cushion 32 may get wet. For this reason, it is necessary to sample the sand of the deep layer portion of the sand cushion 32 at a plurality of locations in the circumferential direction to check the state of the sand.

  For this reason, a person entered the room to dig deep into the sand and collect the sand, but it is not easy to work in a confined space between the containment vessel 30 and the outer wall 31 and dig deep into the dry sand. Therefore, there was a problem that the sand collapsed immediately at the position where it was dug and had to be dug over a wide area.

  Accordingly, an object of the present invention is to solve the above-mentioned problems and provide a sand collecting device that can easily collect deep sand even in a narrow place.

  In order to solve the above-mentioned problems, the present invention is a sand collecting device for collecting deep sand from laminated sand, and is a cylinder that extends vertically and is driven into the sand. A slidable core rod and a bottomed cylindrical body that is attached to the lower end of the core rod and has an opening at the upper end. When the cylindrical body is inserted into the sand, it contacts the cylindrical body. A sand cup is provided that closes the opening, is pushed downward through a core rod, and takes in sand when pulled up.

  A gap is formed between the cylindrical body and the core rod for taking in and releasing sand between the sand cup and the cylindrical body when the sand cup separated from the cylindrical body is pulled up and brought into contact with the cylindrical body. Good.

  The cylindrical body is formed so as to be vertically divided, and covers the outer periphery of the upper end of the core rod when the upper portion of the cylindrical body and the lower portion of the cylindrical body are integrated, and the core rod when the upper portion of the cylindrical body is removed from the lower portion of the cylindrical body It is good to form so that the upper end part of may be exposed.

  A bolt for pushing the core rod downward may be attached to the upper end portion of the cylindrical body.

  The core rod is accommodated in the cylinder when the cylinder and the sand cup come into contact with each other, and is exposed when the sand cup is separated from the cylinder, and when the sand cup is pulled up and brought into contact with the cylinder A tapered guide member may be provided to contact the inner peripheral edge of the lower end of the cylinder and guide the sand cup and the cylinder to be coaxial.

  Moreover, it is good to provide the chain block detachably provided in the said cylinder, and driving a cylinder into sand.

  According to the present invention, sand in a deep layer can be easily collected even in a narrow place.

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

  As shown in FIGS. 1, 2, and 6, the sand collecting device 1 is for collecting a deep layer of sand in the sand pit 33, and is a cylinder 2 that extends in the vertical direction and is driven into the sand. A core rod 3 slidably provided in the cylinder 2 and a bottomed cylinder attached to the lower end of the core rod 3 and having an opening 4 at the upper end. A sand cup 5 that abuts against the cylinder 2 when inserted thereinto, closes the opening 4, is pushed downward through the core rod 3, and takes in sand when pulled up; and the cylinder 2 in the sand And a chain block 6 for driving in.

  As shown in FIGS. 1 and 2, the cylindrical body 2 is formed so as to be vertically divided, and a cylindrical lower part 7 formed on the lower side and having a length equal to or greater than or equal to the depth of the sand; It consists of a cylinder upper part 8 formed on the upper side and detachably attached to the cylinder lower part 7.

  A first flange 9 for attaching the cylinder upper portion 8 is provided at an upper end portion of the cylinder lower portion 7, and pull-in ribs 10 for attaching the chain block 6 are spaced apart from each other by 180 degrees in the circumferential direction. One is provided. The pull-in rib 10 is integrally fixed to the outer peripheral surface of the cylindrical lower portion 7 and is also integrally fixed to the lower surface of the first flange 9, and has a first engagement hole 11 for engaging the chain block 6. Have. As shown in FIGS. 2 and 3, a slide guide 13 is provided on the inner peripheral surface 12 of the cylindrical lower portion 7 to guide the core rod 3 so as to slide up and down. The slide guide 13 is composed of a plurality of guide ribs 14 provided on the inner peripheral surface 12 of the cylindrical lower portion 7 at intervals in the circumferential direction. Each of the guide ribs 14 extends radially inward from the inner peripheral surface of the cylindrical lower portion 7, and the end surface on the inner peripheral side is in sliding contact with the core rod 3 to guide the core rod 3. A gap 15 is formed with the rod 3. The gap 15 is for taking in and releasing sand between the sand cup 5 and the cylinder 2 when the sand cup 5 separated from the cylinder 2 is pulled up and brought into contact with the cylinder 2. A plurality of slide guides 13 are provided in the cylindrical lower portion 7 so as to be separated from each other in the axial direction, and guide the core rod 3 at a plurality of positions in the axial direction.

  The cylinder upper part 8 is formed so as to cover the upper end of the core rod 3 when attached to the cylinder lower part 7, and when the cylinder 2 is driven into the sand, the upper end of the cylinder 2 is covered with a hammer or the like (not shown). You can hit it. That is, the cylindrical upper portion 8 is formed so as to cover the outer periphery of the upper end portion of the core rod 3 when attached to the lower cylindrical portion 7 and to expose the upper end portion of the core rod 3 when removed from the cylindrical lower portion 7. ing. Moreover, the bolt 16 for pushing the core rod 3 downward is attached to the cylinder upper part 8 so that attachment or detachment is possible. Specifically, the bolt 16 is screwed into a female screw (not shown) formed at the upper end portion of the cylinder upper portion 8, and moves downward by pushing forward to push the core rod 3. By rotating in the reverse direction, it is detached from the female screw. A second flange 17 is provided at the lower end of the cylindrical upper portion 8 so as to be detachably attached to the first flange 9 via bolts and nuts (not shown).

  The core rod 3 includes a small-diameter portion 18 having an outer diameter that is sufficiently smaller than the inner diameter of the cylinder 2 from the lower end to the vicinity of the upper end, and a large-diameter portion that is formed at the upper end and has an outer diameter substantially equal to the inner diameter of the cylinder 2. 19 The small-diameter portion 18 slides up and down on the axis of the cylindrical body 2 by being in sliding contact with the slide guide 13 on the outer peripheral surface. The large-diameter portion 19 is covered by the cylindrical upper portion 8 and is exposed by removing the cylindrical upper portion 8 from the cylindrical lower portion 7. The large diameter portion 19 is formed with a second engagement hole 20 for hooking a hook (not shown) of the chain block 6 or the like. As shown in FIGS. 2, 4, and 6, the small-diameter portion 18 is accommodated in the cylindrical lower portion 7 when the cylindrical body 2 and the sand cup 5 abut, and the sand cup 5 is separated from the cylindrical body 2. When the sand cup 5 is pulled out and exposed from the lower part 7 of the cylinder and is brought into contact with the cylinder 2, the sand cup 5 and the cylinder 2 are coaxially brought into contact with the inner peripheral edge of the lower end of the cylinder 2. A tapered guide member 21 for guiding the core rod 3 is provided. Specifically, the guide member 21 is made of a tapered plate material, and a plurality of guide members 21 are provided on the outer peripheral surface of the small-diameter portion 18 at intervals in the circumferential direction with the tapered tips facing upward.

  The sand cup 5 has an upper end formed substantially in the same diameter as the cylindrical body 2 and is formed in a cone shape that tapers downward. When driven into the sand, the sand cup 5 escapes the resistance of the sand. ing. Further, the opening edge 22 at the upper end of the sand cup 5 is inclined so as to be lower on the inner side than the radially outer side, and the sand on the opening edge 22 is guided into the sand cup 5.

  As shown in FIGS. 1 and 2, the chain block 6 is specifically composed of a lever block, and two chain blocks 6 are provided so as to be attached to the respective pull-in ribs 10. Each of the chain blocks 6 is generally provided with a pair of hooks (not shown), a chain 23 connected to one hook, and a winding portion 24 provided on the other hook to wind up the chain 23. In the chain block 6, one hook is engaged with the first engagement hole 11 of the pull-in rib 10, and the other hook is engaged with the fixing system below the pull-in rib 10. The cylindrical body 2 is pulled downward by winding up.

  Next, the operation of this embodiment will be described.

  When collecting sand in the deep layer of the sand cushion 32, first, a scoop or the like (not shown) is inserted from the hatch 36 of the partition plate 35 that divides the upper end of the sand pit 33, and a positioning depression 37 is formed in the surface sand immediately below the hatch 36. Then, the sand collecting device 1 is inserted into the depression 37 at an appropriate depth and stood up. Thereafter, as shown in FIG. 1, one hook of each chain block 6 is engaged with the first engagement hole 11 of the pull-in rib 10, and the other hook faces the partition plate 35 and the hatch 36. And the chains 23 of both chain blocks 6 are simultaneously wound up by the winding portion 24. As a result, the cylinder 2 is pulled vertically downward and is driven into the sand together with the sand cup 5 that is in contact with the lower end of the cylinder 2.

  Further, when the force is insufficient with only the chain block 6, the bolt 16 for pushing the core rod 3 downward may be removed from the cylinder upper part 8, and the upper end of the cylinder 2 may be hit with a hammer or the like. Since the cylindrical body upper portion 8 covers the core rod 3, the core rod 3 is not struck with a hammer, and the cylindrical body 2 can be driven well into the sand.

  As shown in FIG. 5A, when the cylindrical body 2 is driven into the sand to a predetermined depth, the chain 23 is stopped from being rolled up, and the bolt 16 is rotated forward to push the core rod 3 downward. As shown in FIG. 5B, the sand cup 5 is further pushed downward to be separated from the cylindrical body 2, and the opening 4 at the upper end of the sand cup 5 is opened. When the fluidity of the deep sand is high, the sand flows into the sand cup 5. Further, the guide member 21 provided on the core rod 3 moves out of the cylindrical body 2 and is exposed in the sand.

  Thereafter, as shown in FIG. 5C, the cylindrical upper portion 8 is removed from the cylindrical lower portion 7 to expose the large diameter portion 19 of the core rod 3, and all the chain blocks 6 are pulled into the partition plate 35. The core rod 3 is pulled up by removing the rib 10 and pulling the large diameter portion 19 upward. Thereby, the guide member 21 and the sand cup 5 rise. At this time, the sand cup 5 receives resistance from the sand, and the center axis of the sand cup 5 and the core rod 3 may deviate from the axis of the cylindrical body 2, but the guide member 21 provided on the core rod 3 is the cylindrical body. 2 Since the core rod 3 is guided so as to return coaxially with the cylindrical body 2 by coming into contact with the inner peripheral edge of the lower end, the sand cup 5 is automatically coaxial with the cylindrical body 2 when it rises. In addition, when the sand cup 5 is filled with sand, the sand between the sand cup 5 and the cylinder 2 is taken into the gap 15 in the cylinder 2 as the sand cup 5 rises and escapes. When the sand cup 5 is brought into contact with the lower end of the cylindrical lower portion 7, the upper end opening 4 of the sand cup 5 is closed again. In addition, when the sand cup 5 is separated from the cylinder 2, the sand does not flow into the sand cup 5, and when the sand cup 5 is empty, the upper end opening edge 22 of the sand cup 5 scrapes the surrounding sand, The shaved sand is guided into the sand cup 5, and the sand cup 5 is filled with deep sand. When the core rod 3 is further pulled up, the sand cup 5 rises while pushing up the cylinder 2 and is pulled up onto the sand. At this time, the sand cup 5 rises in a state where the upper end opening 4 is closed by the cylindrical body 2, so that no upper layer sand is mixed into the sand cup 5, and only the deep layer sand is collected. be able to. Further, the lifting operation of the core rod 3 may be performed using the chain block 6 removed from the partition plate 35 and the pull-in rib 10. Specifically, one hook of the chain block 6 is engaged with the second engagement hole 20 of the large diameter portion 19, and the other hook is engaged with a fixing system such as a scaffold above the hatch 36 to wind up The chain 23 may be wound up at the portion 24.

  As described above, the cylindrical body 2 that extends vertically and is driven into the sand, the core rod 3 that is slidable in the vertical direction within the cylindrical body 2, and the lower end of the core rod 3 are attached to the upper end. After the cylindrical body 2 is inserted into the sand, the cylindrical body 2 abuts against the cylindrical body 2 to close the opening 4 and is pushed downward through the core rod 3. Since the sand collecting device 1 is configured to include the sand cup 5 that takes in the sand when pulled up, the sand in the deep layer portion can be easily collected even in a narrow place such as the sand pit 33.

  Further, when the sand cup 5 separated from the cylinder 2 is pulled up and brought into contact with the cylinder 2 between the cylinder 2 and the core rod 3, the sand between the sand cup 5 and the cylinder 2 is taken in. Since the clearance 15 for escaping is formed, it is possible to prevent sand from being caught between the sand cup 5 and the cylinder 2, and when the sand cup 5 is pulled up, the upper end opening 4 of the sand cup 5 is opened. Can be reliably closed with the cylindrical body 2.

  The cylindrical body 2 is formed so that it can be divided into upper and lower parts. When the cylindrical upper part 8 and the cylindrical lower part 7 are integrated, the cylindrical body 2 covers the outer periphery of the upper end of the core rod 3 and the cylindrical upper part 8 is removed from the cylindrical lower part 7. Since the upper end portion of the rod 3 is exposed, when the outer periphery of the upper end portion of the core rod 3 is covered with the upper portion 8 of the cylindrical body, the upper end of the cylindrical body 2 can be hit with a hammer or the like to drive the cylindrical body 2 into the sand. The core rod 3 can be easily pulled up when the cylinder upper part 8 is removed.

  Since the bolt 16 for pushing the core rod 3 downward is attached to the upper end portion of the cylindrical body 2, the core rod 3 can be easily pushed down with a simple structure, and the upper end of the cylindrical body 2 is attached to the hammer. When hitting with the like, it can be easily detached from the cylinder 2.

  The core 3 is accommodated in the cylinder 2 when the cylinder 2 and the sand cup 5 come into contact with each other, and is exposed when the sand cup 5 is separated from the cylinder 2, and the sand cup 5 is lifted to raise the cylinder 2. The taper-shaped guide member 21 is provided to contact the inner peripheral edge of the lower end of the cylindrical body 2 and guide the sand cup 5 and the cylindrical body 2 so as to be coaxial with each other. When the sand cup 5 is lifted and brought into contact with the cylinder 2, the cylinder 2 and the sand cup 5 can be reliably made coaxial and the upper end opening 4 of the sand cup 5 can be reliably closed.

  Since the sand collecting device 1 is configured to be detachably provided on the cylinder 2 and includes the chain block 6 for driving the cylinder 2 into the sand, the sand collecting device 1 can be easily driven into the ground with a simple structure. Can do.

  The chain block 6 for driving the cylinder 2 into the sand is provided. However, when the height of the sand to be stacked is low or the fluidity of the sand is extremely high, the sand collecting device in the sand. The chain block 6 does not have to be provided when 1 can be driven with a small force.

  In addition, a pair of the pull-in ribs 10 is provided with an interval of 180 degrees in the circumferential direction, but a plurality of pull-in ribs 10 may be provided with a predetermined interval in the circumferential direction. In this case, the chain block 6 may be provided in the same number as the pull-in ribs 10.

It is a front view of the use condition of the sand sampling apparatus which shows suitable embodiment of this invention. It is a principal part expanded sectional view of FIG. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. FIG. 3 is a cross-sectional view taken along line B-B in FIG. 2. It is explanatory drawing which shows the use procedure of a sand collection apparatus, (a) shows the state which struck the sand collection apparatus in sand, (b) shows the state which pushed down the core rod and separated the sand cup from the cylinder. (C) shows the state which pulled up the core rod and made the sand cup contact | abut to a cylinder again. It is a principal part expanded sectional view of the sand collection device which pushed down the sand cup. It is a schematic explanatory drawing of a nuclear reactor containment vessel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sand sampling device 2 Cylinder 3 Core rod 4 Opening 5 Sand cup 6 Chain block 7 Cylinder lower part 8 Cylinder upper part 15 Gap 16 Bolt 21 Guide member

Claims (6)

  A sand collection device for collecting deep sand from stacked sand, a cylinder body that extends vertically and is driven into the sand, a core rod that is slidable up and down in the cylinder body, It is attached to the lower end of the core rod and is formed in a bottomed cylindrical shape having an opening at the upper end, and when the cylinder is inserted into the sand, it abuts against the cylinder and closes the opening, And a sand cup for taking in sand when it is pulled down and then pulled up.   A gap is formed between the cylindrical body and the core rod for taking in and releasing sand between the sand cup and the cylindrical body when the sand cup separated from the cylindrical body is pulled up and brought into contact with the cylindrical body. The sand collecting device according to claim 1.   The cylindrical body is formed so as to be vertically divided, and covers the outer periphery of the upper end of the core rod when the upper portion of the cylindrical body and the lower portion of the cylindrical body are integrated, and the core rod when the upper portion of the cylindrical body is removed from the lower portion of the cylindrical body The sand collecting device according to claim 1, wherein the sand collecting device is formed so as to expose an upper end portion of.   The sand sampling device according to any one of claims 1 to 3, wherein a bolt for pushing the core rod downward is attached to an upper end portion of the cylindrical body.   The core rod is accommodated in the cylinder when the cylinder and the sand cup come into contact with each other, and is exposed when the sand cup is separated from the cylinder, and when the sand cup is pulled up and brought into contact with the cylinder The sand collecting device according to any one of claims 1 to 4, further comprising a tapered guide member that abuts the inner peripheral edge of the lower end of the cylinder and guides the sand cup and the cylinder to be coaxial.   The sand collecting device according to any one of claims 1 to 5, further comprising a chain block that is detachably provided on the cylindrical body and is used to drive the cylindrical body into sand.

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