JP2016017277A - Rounded-corner guide jig for intake channel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rounded-corner guide jig for an intake channel of a double-layer structure having an upper channel installed between a top slab part with an opening and a slab with an opening and a lower channel installed between the slab and a bottom slab part, the rounded-corner guide jig allowing a rounded-corner board to be guided toward the lower channel from the upper channel without work performed by a diver.SOLUTION: A rounded-corner guide jig for an intake channel includes a pair of guide members 10 spanned through an opening 113a of a top slab part 113 and an opening 112a of a slab 112, configured to guide each edge part of a rounded-corner plate 1. The pair of guide members 10 are connected by a girder part 20. The guide members 10 and the girder part 20 may be connected and disassembled.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a guide jig for angle drop for a water intake channel used in a two-layer intake channel having an upper water channel and a lower water channel.

  For example, in thermal power plants and nuclear power plants, intake channels for taking in seawater for cooling are laid. This intake channel is opened and closed by a corner drop plate that moves up and down. Then, the angle drop plate descends and the intake channel is closed to block seawater, and the intake channel is inspected and cleaned. This angle drop plate is lifted and lowered by being suspended by a device such as a crane (see Patent Document 1).

  By the way, as shown in FIG. 4, an intake channel may be laid in the ground (underdrain). This intake channel has a two-layer structure of an upper water channel 101 and a lower water channel 102. The upper water channel 101 is provided in a region surrounded by the pair of side wall portions 111, the slab 112, and the top plate portion 113. The lower water channel 102 is provided in a region surrounded by the pair of side wall portions 114, the bottom plate portion 115, and the slab 112. Therefore, the upper water channel 101 and the lower water channel 102 are partitioned by the slab 112.

  In addition, the slab 112 and the top plate 113 are provided with openings 112a and 113a having a rectangular shape in plan view through which the angle drop plate 1 (see FIG. 5) passes. The openings 112a and 113a formed in a rectangular shape in plan view have a short side (not numbered) along the side walls 111 and 114 and a long side (numbered) spanning the side walls 111 and 114. Not).

  Further, an opening 112 a of the slab 112 is provided immediately below the opening 113 a of the top plate 113. A tapered surface 112 b is formed on the upper surface of the opening 112 a of the slab 112.

  And in each side wall part 114 of the lower water channel 102, the groove part 114a which engages each edge part of the angle drop board 1 is formed in the perpendicular direction following the opening part. A packing (not shown) for securing water tightness is fitted in the groove 114a.

  The upper water channel 101 is provided with a dredging wall portion 116 on the land side (right side in the drawing) from the openings 112a and 113a so that seawater in the upper water channel 101 does not flow to the land side from the dredging wall portion 116. Has been. By providing such an upper water channel 101, the water control amount is halved.

  Then, a plurality of (two in FIG. 5) square drop plates 1 are respectively suspended from a device such as a crane, lowered from the upper water channel 101 into the lower water channel 102, and as shown in FIG. Is closed so that the seawater in the lower water channel 102 does not flow to the land side.

  In order to block seawater with such a corner drop plate 1, the diver slabs the corner drop plate 1 descending from the opening 113 a of the top plate 113 while the diver dives into the sea water in the upper water channel 101. It leads to the opening 112a of 112. After each end portion of the corner drop plate 1 is fitted in each groove 114a of the lower water channel 102, the corner drop plate 1 is lowered without being displaced. And the inside of the lower channel 102 is closed by stacking a plurality of the corner dropping plates 1, and the seawater in the lower channel 102 is blocked so as not to flow to the land side.

  When the seawater blocked in the lower water channel 102 flows to the land side, the diver dives into the upper water channel 101 and performs a slinging operation on the corner drop plate 1. Then, when the operator operates a device such as a crane on the ground, the corner drop plate 1 in the lower water channel 102 passes through the upper water channel 101 and is lifted to the ground.

JP-A-8-53829

  In order to open and close the two-layer intake channel with the angle drop plate 1, a diver diving in the upper water channel 101 and an operator who operates a device such as a crane on the ground have to work together. However, it is difficult for the operator to check the work status of the diver, and the work time is prolonged.

  Then, this invention makes it a subject to provide the angle drop guide jig for intake channels which enabled it to open and close an intake channel, even if a diver does not work.

  An angle drop guide jig for an intake channel according to the present invention is provided between an upper water channel provided between a top plate portion having an opening portion and a slab having an opening portion, and between the slab and the bottom plate portion. In order to be used for opening and closing the lower water channel by a corner drop plate in a two-layer intake channel having a lower water channel formed, spanned between the opening of the top plate portion and the opening of the slab, and A pair of guide members for guiding each end portion of the angle drop plate are provided.

  According to this angle drop guide jig for the intake channel, the lower guide channel is installed by installing the pair of guide members in the upper channel so as to span the opening of the top plate and the opening of the slab. Both ends of the angle drop plate used for opening and closing the door are guided by a pair of guide members. Therefore, by using this intake channel angle drop guide jig, it is not necessary to guide the angle drop plate by a diver.

  Here, the structure provided with the girder part which connects the said guide member which makes the said pair as an aspect of the angle drop guide for intake channels which concerns on this invention is employable. According to the intake guide angle drop guide jig, the interval between the guide members paired by the girder portion can be maintained constant.

  Further, as another embodiment of the intake channel corner dropping guide jig according to the present invention, a configuration in which the guide member and the beam portion can be connected and disassembled can be employed. According to this intake channel angle drop guide jig, when not required, the intake channel angle drop plate should be removed from the upper water channel and stored in a warehouse, etc., and installed in the upper water channel of another intake channel. Can do.

  Moreover, the structure provided with the fixing member which fixes the said guide member to the ground surface side of the said top plate part can be employ | adopted as another different aspect of the angle drop guide jig for intake channels which concerns on this invention. According to this intake channel angle drop guide jig, when the guide member is fixed to the ground surface side of the top plate portion by the fixing member, the guide member is not displaced, and when the angle drop plate is pulled up, It is possible to prevent the intake channel angle drop guide jig from rising.

  As another different aspect of the intake channel angle drop guide jig according to the present invention, the guide member is connected to a pair of angle members that guide the corners of the angle drop plate, and the pair of angle members. The structure provided with the some connecting member to do is employable. According to this intake channel angle drop guide jig, the guide member can be lightened and lightened.

  Further, as another different aspect of the intake channel angle drop guide jig according to the present invention, the guide member is a leg portion protruding from the lower end side toward the other guide member, and is installed on the slab. A configuration including legs can be employed. According to this intake channel angle drop guide jig, the guide member is also supported by the legs, so that the intake channel angle drop guide jig installed in the upper water channel can be in a stable posture.

  Further, as still another aspect of the intake channel angle drop guide jig according to the present invention, at least one of a stay spanned between the guide member and the girder and a horizontal member spanned at the lower end of the guide member A configuration including one can be employed. According to this intake channel angle drop guide jig, by providing at least one of the stay and the horizontal member, the intake channel angle drop guide jig can be made difficult to be deformed.

  ADVANTAGE OF THE INVENTION According to this invention, even if a diver does not work, the angle drop guide jig for intake channels which enabled it to open and close an intake channel can be provided.

FIG. 1 is an embodiment of an intake channel angle drop guide jig according to the present invention, showing a state where the intake channel is installed in an intake channel, wherein (a) is a schematic sectional front view, and (b) is a schematic sectional side view. It is. 2A and 2B show an embodiment of a cornering guide jig for intake channels according to the present invention, wherein FIG. 2A is a schematic sectional front view, and FIG. 2B is a schematic side view. FIG. 3 shows an embodiment of the angle drop guide jig for intake channels according to the present invention, and shows a state where the angle drop plate is installed in the intake channel, and (a) is a schematic sectional front view. (B) is a schematic sectional side view. FIG. 4 shows an example of a conventional intake channel, where (a) is a schematic sectional front view, and (b) is a schematic sectional side view. FIGS. 5A and 5B show a state in which a conventional intake channel is closed by a corner drop plate, where FIG. 5A is a schematic sectional front view, and FIG.

  An embodiment of a cornering guide jig for intake channels according to the present invention will be described with reference to FIGS. 1 to 3. The same parts as those in the conventional art will be described with the same reference numerals.

  As shown in FIG. 1, this intake channel angle drop guide jig (hereinafter referred to as “guide jig”) includes a top plate portion 113 having an opening portion 113 a and a slab 112 having an opening portion 112 a. Opening and closing of the lower water channel 102 by the angle drop plate 1 in a two-layer intake channel having an upper water channel 101 provided in between and a lower water channel 102 provided between the slab 112 and the bottom plate 115. And a pair of guide members 10 that span between the opening 113a of the top plate 113 and the opening 112a of the slab 112 and that guide each end of the corner drop plate 1. Yes.

  More specifically, each guide member 10 is bridged between the short sides of the opening 113a of the top plate 113 and the opening 112a of the slab 112 so as to be along the pair of side walls 111 of the upper water channel 101. Installed in pairs. In addition, a groove part is not formed in a pair of side wall part 111 of this upper side water channel 101, but the groove part 114a extended below from the opening part 112a of the slab 112 is formed in a pair of side wall part 114 of the lower side water channel 101. Has been.

  As shown in FIG. 2, the guide member 10 is formed between a pair of angle-shaped members 11 and a pair of angle-shaped members 11 that guide each corner of the corner plate 1. A flat bar-shaped member 13 is disposed, and a pair of angle-shaped members 11 and a connecting member 12 that connects the flat bar-shaped members 13 are provided. Such a guide member 10 is in a thinned state and is reduced in weight. The angle-shaped member 11 has an L-shaped cross section, and guides the corner of the end portion of the plate 1 with the angle falling to the inside while being installed in a vertical posture.

  Further, the guide jig includes a girder portion 20 that connects the pair of guide members 10. The girder 20 connects the upper end of one guide member 10 and the upper end of the other guide member 10. Moreover, the girder part 20 is comprised by the cross section L-shaped angle or a flat bar.

  In addition, two parallel beams 20 are connected to the guide member 10 so as to allow the angle drop plate 1 to be inserted therethrough. One girder 20 is connected to one corner of the upper end of the guide member 10, and the other girder 20 is connected to the other corner of the upper end of the guide member 10. The guide member 10 and the girder 20 can be connected and disassembled.

  The guide jig includes a fixing member 30 that fixes the guide member 10 to the ground surface side of the top plate portion 113. The fixing member 30 is provided by projecting both ends of the connecting member 12 at the upper end. Alternatively, the fixing member 30 is provided by projecting both ends of each beam portion 20. Alternatively, the fixing member 30 is provided by another member that attaches a member such as a bracket to the connecting member 12 or the girder 20 at the upper end.

  In any case, the fixing member 30 is formed with a through hole (not shown) through which an anchor bolt (not shown) passes. The anchor bolt is constructed on the ground surface side of the top plate 113 and at a position adjacent to the opening 113a.

  Each guide member 10 includes a leg portion 14 installed on the tapered surface 112b of the slab 112. The leg portion 14 is formed, for example, in an L shape, and protrudes from the lower end portion of one angle-shaped member 11 toward the other guide member 10.

  A single horizontal member 40 is bridged between the lower end portions of the guide members 10, for example, the leg portions 14. However, the horizontal member 40 may be bridged between the lower end portions of the angle-shaped member 11 where the leg portions 14 are not provided. In this case, the interval between the pair of horizontal members 40 is slightly wider than the thickness of the corner plate 1 so that the corner plate 1 can pass between the pair of girders 20.

  Further, the guide jig is assembled in a rectangular frame shape when viewed from the front by the horizontal member 40, the beam portion 20, and the pair of angle-shaped members 11.

  Then, an oblique stay 50 is attached to the intermediate portion of each guide member 10 and the intermediate portion of the girder portion 20. The stay 50 prevents the guide jig assembled in a frame shape from being easily deformed.

  This guide jig is configured as described above. Next, a method for using the guide jig in the water channel will be described.

  In the intake channel, seawater flows in the lower water channel 102 and the sea water is almost full in the upper water channel 101 at normal times. At the time of inspection or cleaning of the intake channel, the lower water channel 102 is dammed by the angle drop plate 1. Therefore, it is assembled in a frame shape with the guide jig lying down near the intake channel.

  The assembled guide jig is suspended in an upright position by the operator operating an apparatus such as a crane, and descends into the upper water channel 101 from the opening 113a of the top plate 113. When the lower end of the guide jig hits the opening 112a of the slab 112, the guide jig stops.

  Since the tapered surface 112b is formed on the upper surface of the opening 112a of the slab 112, the horizontal member 40 at the lower end of the guide jig is fitted into the tapered surface 112b. Moreover, the leg part 14 and the horizontal member 40 of a guide jig will be in the state supported by this taper surface 112b.

  On the other hand, the fixing member 30 provided at the upper end of the guide jig overlaps the ground surface side of the top plate 113. In this state, the anchor bolt on the ground surface side of the top plate portion 113 passes through the through hole formed in the fixing member 30 of the guide jig. By fastening the nut to the anchor bolt, the upper part of the guide jig is fixed.

  In this way, the guide jig is installed in the upper water channel 101. In this guide jig, the corner drop plate 1 suspended from an apparatus such as a crane is lowered. Specifically, as shown in FIG. 3, the lifting beam 2 is suspended from a sling wire 3 suspended from a crane (not shown), and the hanging hook 4 provided on the lifting beam 2 is joined to the angle drop plate 1. The corner drop plate 1 is lowered by being hooked on a suspension pin (not shown). The corners at both ends of the corner drop plate 1 are guided by the angle-shaped member 11 of the guide member 10 and descend straight to the opening 112a of the slab 112.

  Then, the corner drop plate 1 descends in the lower water channel 102. At this time, each end portion of the corner drop plate 1 is fitted straight into the groove portions 114 a formed in the respective side wall portions of the lower water channel 102, and thus falls straight. When the lower water channel 102 is completely closed by the plurality of corner dropping plates 1, seawater in the lower water channel 102 is blocked.

  When flowing seawater into the lower water channel 102, the angle drop plate 1 is pulled up by a device such as a crane. The corner drop plate 1 rises from the lower water channel 102 into the upper water channel 101. In the upper water channel 101, both end portions of the corner drop plate 1 are guided by the angle-shaped member 11 of the guide jig, and thus rise without wobbling. Further, since the guide member 10 is fixed to the ground surface side of the top plate portion 113 by the fixing member 30, the guide jig does not rise as the angle drop plate 1 rises.

  When all the corner dropping plates 1 are discharged from the intake channel, the fixing of the guide member 10 by the fixing member 30 and the top side of the top plate 113 is released. Then, the guide jig is pulled up from the upper water channel 101 by a device such as a crane. The guide jig is laid down on the ground near the intake channel and disassembled. The disassembled guide jig is stored in a warehouse or is transported near another intake channel.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. For example, in the above embodiment, the guide member 10 and the girder 20 can be connected and disassembled. However, when the guide jig is permanently installed in the upper water channel 101, it is not necessary to be able to disassemble it. In this case, the guide jig may fix the guide member 10 to the side wall portion 111 of the upper water channel 101 with a bolt or the like and not include the beam portion 20.

  Moreover, in the said embodiment, the guide member 10 shall be equipped with a part of a pair of angle-shaped member 11, the flat bar-shaped member 13, and the connection member 12. FIG. However, the guide member 10 may not include the flat bar-shaped member 13, and conversely, may be configured by a single plate-shaped member having a U-shaped cross section having no parts.

  In the above embodiment, the guide jig includes the stay 50 and the horizontal member 40. However, the guide jig may include only one of the stay 50 or the horizontal member 40. Further, the horizontal member 40 may be provided in an intermediate portion of the guide member 10.

  In the above embodiment, the girder 20 is connected to the upper end of the guide member 10. However, the girder 20 may be connected to the intermediate part of the guide member 10 or may be connected to both the upper end part and the intermediate part. Furthermore, in the said embodiment, the girder part 20 was comprised with two parallel. However, the girder 20 may be composed of only one.

1 ......... Corner drop plate 10 ......... Guide member 11 ......... Angle member 12 ......... Connecting member 14 ...... Leg portion 20 ......... Girder portion 30 ......... Fixing member 40 ... Stand member 50 ... stay 101 ... upper water channel 102 ... lower water channel 112 ... slab 112a ... opening 113 ... top plate part 113a ... opening 115 ... bottom plate part

Claims (7)

  A two-layer intake channel having an upper water channel provided between the top plate portion having the opening and the slab having the opening portion, and a lower water channel provided between the slab and the bottom plate portion. Is used for opening and closing the lower water channel by the angle drop plate at the top, so that it is bridged between the opening of the top plate portion and the opening of the slab and forms a pair for guiding each end of the angle drop plate A corner dropping guide jig for intake channels, characterized by comprising a member.   The corner dropping guide jig for intake channels according to claim 1, further comprising a girder portion that connects the paired guide members.   The intake guide angle dropping guide jig according to claim 2, wherein the guide member and the girder are connectable and disassembling.   The intake guide angle drop guide jig according to any one of claims 1 to 3, further comprising a fixing member that fixes the guide member to a ground surface side of the top plate portion.   The said guide member is equipped with a pair of angle-shaped member which guides the corner | angular part of a corner drop plate, and several connection members which connect this pair of angle-shaped member of Claim 1 thru | or 4 characterized by the above-mentioned. The corner drop guide jig for intake channels according to any one of the above items.   The said guide member is a leg part which protruded toward the other guide member from the lower end side, Comprising: The leg part installed in the said slab is provided. The angle drop guide jig for intake channels as described in 1.   7. At least one of a stay that spans between the guide member and the girder or a horizontal member that spans the lower end of the guide member is provided. The angle drop guide jig for the intake channel as described.

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