JP2010270589A - Grating for use in penetration-part structure for floor piping or equipment - Google Patents

Grating for use in penetration-part structure for floor piping or equipment Download PDF

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JP2010270589A
JP2010270589A JP2010157433A JP2010157433A JP2010270589A JP 2010270589 A JP2010270589 A JP 2010270589A JP 2010157433 A JP2010157433 A JP 2010157433A JP 2010157433 A JP2010157433 A JP 2010157433A JP 2010270589 A JP2010270589 A JP 2010270589A
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grating
pipe
flat bar
hole
floor
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JP5401406B2 (en
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Motohiro Miyake
基寛 三宅
Kinzo Onchi
金蔵 恩地
Takaaki Sakakida
高明 榊田
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Hitachi GE Nuclear Energy Ltd
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Hitachi GE Nuclear Energy Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To easily build a structure of a penetration part for piping into a grating. <P>SOLUTION: Semicircular cutouts are formed as a through-hole 2 on the edge of the gratings 1a, 1b which are spread over a floor. In the through-hole 2, a flanged flat bar, which is a vertical flat bar 3 with a horizontal flange 7, is installed. The piping 6 is surrounded by the flat bar 3, and the flat bar 3 is supported by the flange 7. In case of preventing an accidental contact of the piping 6 with the edge of the through-hole 2 by enlarging the through-hole 2, the flange 7 covers the unnecessary opening of the through-hole 2. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

本発明は、床に配管を貫通するための方法及び構造並びにその構造に用いる部品に関する。   The present invention relates to a method and structure for penetrating pipes in a floor and components used in the structure.

原子力発電所のタービン建屋内には、電動機駆動原子炉給水ポンプがある区画された室内に設置され、そのポンプに接続された配管がその室内に三次元的に配置されている。   In a turbine building of a nuclear power plant, a motor-driven nuclear reactor water pump is installed in a compartmented room, and piping connected to the pump is three-dimensionally arranged in the room.

その配管を保守点検する場合に必要な操作架台が同室内に設置され、その操作架台の床を配管や弁等の機器が上下に貫通して配置されている。このような操作架台の床は室内の天井と床との間の中間高さ領域に設けられることから中間床とも称せられ、その架台の床面には床材として通気性や配光性を考慮してグレーチングが敷設される(例えば、特許文献1参照)。   An operation base necessary for maintenance inspection of the pipe is installed in the same room, and equipment such as pipes and valves are arranged vertically through the floor of the operation base. Since the floor of such an operation stand is provided in the middle height area between the ceiling and the floor in the room, it is also called an intermediate floor. The floor surface of the stand is considered a floor material in consideration of air permeability and light distribution. Then, the grating is laid (for example, refer to Patent Document 1).

床の床面に床材としてグレーチングを敷設する際には、直交する4辺の縁を有する構成の複数個のグレーチングを床面に敷き詰めることも公知である(例えば、特許文献2参照)。   When laying a grating as a flooring material on a floor surface, it is also known to lay a plurality of gratings having a configuration with four orthogonal edges on the floor surface (see, for example, Patent Document 2).

特開平08−086037号公報Japanese Patent Application Laid-Open No. 08-086037 特開平11−241489号公報Japanese Patent Application Laid-Open No. 11-241489

原子力発電所のタービン建屋の室内に操作架台を設けて、その操作架台の床に原子力発電プラントを構成する配管や機器を上下方向に貫通させる場合には、次のようなことが考えれる。   In the case where an operation base is provided in the turbine building of a nuclear power plant and piping and equipment constituting the nuclear power plant are vertically penetrated through the floor of the operation base, the following may be considered.

即ち、操作架台の床面に敷設した複数個のグレーチングの内、配管が貫通する箇所のグレーチングに配管の外形よりも大径の貫通孔を設け、その貫通孔に配管を通して、配管を配置する。   That is, among the plurality of gratings laid on the floor surface of the operation base, a through hole having a diameter larger than the outer shape of the pipe is provided in the grating where the pipe penetrates, and the pipe is arranged through the through hole.

その貫通孔の縁には、グレーチングと配管や、配管の周囲に設けた保温構造部材との接触を避け、且つ床上の器具や作業員がその貫通孔に落下することを抑制できるように、平板を湾曲させたフラットバーを縁取り部材として溶接固定し、フラットバーの上部を操作架台の床面よりも上方に突き出しておく。   The edge of the through hole is flat so that contact between the grating and the pipe or the heat insulation structure member provided around the pipe can be avoided, and equipment on the floor and workers can be prevented from falling into the through hole. A flat bar having a curved shape is welded and fixed as an edging member, and the upper portion of the flat bar protrudes upward from the floor surface of the operation base.

この場合、配管を室内に敷設してからグレーチングを敷設することや、配管を貫通させた後にグレーチングを外すことを考慮して、図1のように、グレーチングの縁に半円状の貫通孔を貫通孔の一部分として形成し、その貫通孔の他部分を隣接する他のグレーチングの縁に形成して、合わせて一つの共通の貫通孔とするようにグレーチングを敷設することが考えられる。   In this case, in consideration of installing the grating after laying the pipe in the room or removing the grating after penetrating the pipe, a semicircular through hole is formed at the edge of the grating as shown in FIG. It is conceivable to form the grating as a part of the through hole, and to form the other part of the through hole at the edge of another adjacent grating, and to lay the grating so as to form one common through hole.

その場合、貫通する部材が配管の場合を想定すると、その配管がグレーチングを貫通する箇所では、図1に示す通り、配管6が貫通する箇所に敷設されるグレーチング1は、配管6に対して対称に2つに分けて、それぞれに配管6の口径より大きな半円形の貫通孔2を設ける。   In this case, assuming that the penetrating member is a pipe, the grating 1 laid at the place where the pipe 6 penetrates is symmetrical with respect to the pipe 6 at the place where the pipe penetrates the grating as shown in FIG. The semicircular through hole 2 larger than the diameter of the pipe 6 is provided in each of the two.

そしてグレーチング1には作業員の落下防止用として、貫通孔2の孔形状に合わせて半円形に加工されたフラットバー3を縁取り部材としてそれぞれの貫通孔の縁に溶接してグレーチング1と一体化する。   The grating 1 is integrated with the grating 1 by welding a flat bar 3 processed into a semicircle according to the shape of the through hole 2 to the edge of each through hole as an edge member for preventing the worker from dropping. To do.

この場合には、グレーチング1は格子状であり、フラットバー3とグレーチング1の接する箇所には全て溶接4及び溶接5を実施することになる。   In this case, the grating 1 has a lattice shape, and the welding 4 and the welding 5 are performed on all the portions where the flat bar 3 and the grating 1 are in contact with each other.

また、配管6の位置が変動し、配管6とフラットバー3が干渉した場合には、フラットバー3とグレーチング1両方を全部撤去して、配管6と干渉することがないようにフラットバー3とグレーチング1両方を全部再製作することが考えられる。   When the position of the pipe 6 fluctuates and the pipe 6 and the flat bar 3 interfere with each other, both the flat bar 3 and the grating 1 are removed so that the flat bar 3 and the pipe 6 do not interfere with each other. It is conceivable to remanufacture both the gratings 1 entirely.

このような技術では、施工のし易さの点について配慮がされておらず、フラットバー3をグレーチング1に設置するためには、グレーチング1との接触箇所全てにおいて溶接4及び溶接5を実施する必要があり、フラットバー3設置に時間がかかるという問題があった。   In such a technique, consideration is not given to the ease of construction, and in order to install the flat bar 3 on the grating 1, the welding 4 and the welding 5 are carried out at all the contact points with the grating 1. There is a problem that it takes time to install the flat bar 3.

また、配管6の位置が変動して、配管6とフラットバー3が干渉した場合には、フラットバー3及び配管6に隣接する2個のグレーチング1を全部撤去して再製作せざるを得ず、多くのコストと時間がかかるという問題が発生する。   If the position of the pipe 6 fluctuates and the pipe 6 and the flat bar 3 interfere with each other, the two gratings 1 adjacent to the flat bar 3 and the pipe 6 must be removed and remanufactured. The problem arises that it takes a lot of cost and time.

従って、本発明の目的は、配管や機器が貫通する床の貫通部分の構造を、それらの配管や機器の位置の変位の有無にかかわらず、極力容易に施工することである。   Therefore, an object of the present invention is to construct the structure of the penetration part of the floor through which piping and equipment penetrate as easily as possible regardless of whether or not the position of the piping or equipment is displaced.

本発明の課題を解決する手段は、配管又は機器を貫通させる床の箇所に床材として隣りあわせで敷設された少なくとも2個のグレーチングにおいて、前記配管貫通孔の一部分が一方の前記グレーチングの縁に設けられ、前記貫通孔の他の部分が前記縁に隣接する他方のグレーチングの縁に設けられている床の配管又は機器の貫通部構造に用いるグレーチングである。   Means for solving the problems of the present invention is that, in at least two gratings laid side by side as floor materials in a floor portion through which piping or equipment penetrates, a part of the piping through hole is at one edge of the grating. It is a grating used for a floor piping or a through-hole structure of equipment provided on the other grating edge adjacent to the edge of the other through hole.

本発明によれば、貫通孔の一部を覆うように鍔部を床材に置いて簡単に貫通部構造を施工できる。   According to the present invention, the through-hole structure can be easily constructed by placing the collar on the floor material so as to cover a part of the through-hole.

グレーチングに対する配管の貫通部構造を示しており、(a)図はグレーチングの上面図、(b)図はフラットバーを示す斜視図、(c)図はフラットバーを据付たグレーチングの上面図、(d)図は配管の貫通部構造の上面図である。Fig. 2 shows a through-hole structure of a pipe with respect to the grating, wherein (a) is a top view of the grating, (b) is a perspective view showing the flat bar, (c) is a top view of the grating with the flat bar installed, d) The figure is a top view of the through-hole structure of the pipe. (a)図は、本発明の実施例による配管貫通部に採用される鍔付きフラットバーの斜視図であり、(b)図は(a)図の鍔付きフラットバーを採用した配管の貫通部構造の上面図である。(A) The figure is a perspective view of the flat bar with a hook employ | adopted as the pipe penetration part by the Example of this invention, (b) The through part of the pipe which employ | adopted the flat bar with a hook of (a) figure It is a top view of a structure. (a)図は、本発明の実施例における配管とフラットバーとの干渉状態を示した配管貫通部構造の上面図であり、(b)図は、その干渉事故を防ぐように貫通孔を拡大した状態のグレーチングと配管との関係を上方からみた上面図である。(A) The figure is a top view of the piping penetration part structure which showed the interference state of piping and the flat bar in the Example of this invention, (b) The figure expanded the through-hole so that the interference accident might be prevented. It is the top view which looked at the relationship between the grating of the state and piping which were made from the upper direction. 図3(b)図のグレーチングに鍔付きフラットバーを据付た状態の配管の貫通部構造の上面図である。It is a top view of the penetration part structure of piping in the state where the flat bar with a hook was installed in the grating of Drawing 3 (b). 本発明の実施例を適用して操作架台床近傍の斜視図である。It is a perspective view of the operation stand floor vicinity by applying the embodiment of the present invention.

原子力発電所のタービン建屋内の室内には、電動機駆動原子炉給水ポンプが設置され、そのポンプに接続された配管6が、図5のように、その室内に三次元的に配置されている。   An electric motor-driven nuclear reactor water pump is installed in the turbine building of the nuclear power plant, and piping 6 connected to the pump is three-dimensionally arranged in the room as shown in FIG.

その配管6を保守点検する場合に必要な操作架台10が同室内の床11に設置され、その操作架台10の床12を配管6や図示していない弁等の機器が上下に貫通して配置されている。   An operation base 10 necessary for maintenance inspection of the pipe 6 is installed on the floor 11 in the same room, and the pipe 6 and valves and other devices (not shown) penetrate the floor 12 of the operation base 10 vertically. Has been.

操作架台10は、床11に立てた支柱13と、その支柱13で支持された梁14と、その梁14に梁14と直交して支持された根太15と、根太15上にボルトなどで着脱自在に敷き詰めた複数個のグレーチング1とで構成されている。   The operation stand 10 includes a support column 13 standing on the floor 11, a beam 14 supported by the support column 13, a joist 15 supported by the beam 14 orthogonal to the beam 14, and a bolt or the like on the joist 15 It consists of a plurality of gratings 1 that are laid freely.

このようなグレーチング1で床面が構成された操作架台10の床12は、室内の天井と床11との間の中間高さ領域に位置する。このようにして、その操作架台10の床面には床材として通気性や配光性を考慮してグレーチング1が敷設される。床材は、通気性や配光性を考慮し無ければ、グレーチングに限定される必要は無い。   The floor 12 of the operation stand 10 having a floor surface made of the grating 1 is located in an intermediate height region between the indoor ceiling and the floor 11. In this way, the grating 1 is laid on the floor surface of the operation base 10 in consideration of air permeability and light distribution as a flooring material. The flooring material need not be limited to grating unless air permeability and light distribution are taken into consideration.

配管が貫通する床12の部分を上方から見ると、図2のように、配管6を挟んで左右対称に配置された二個のグレーチング1が存在する。説明の便宜上、一方のグレーチングをグレーチング1aとし、それに隣接する他方のグレーチング1をグレーチング1bとして説明する。   When the portion of the floor 12 through which the pipe passes is viewed from above, there are two gratings 1 arranged symmetrically with respect to the pipe 6 as shown in FIG. For convenience of explanation, one grating is described as a grating 1a, and the other grating 1 adjacent thereto is described as a grating 1b.

グレーチング1aとグレーチング1bとはいずれも4辺の縁を有する長方形の形状である。隣接しあうグレーチング1aとグレーチング1bとには、お互いに対面しあう縁に部分円弧状である半円形の切欠きが加工されている。   Each of the grating 1a and the grating 1b has a rectangular shape having four side edges. The adjacent grating 1a and grating 1b are processed with semicircular cutouts that are partially arcuate at the edges that face each other.

グレーチング1aに形成されたその切欠きは、配管6を通すための貫通孔2の一部、約半分を形成している。グレーチング1bに形成されたその切欠きは、配管6を通すための貫通孔2の他部、約半分を形成している。   The notch formed in the grating 1 a forms a part of the through hole 2 for passing the pipe 6 and about half. The notch formed in the grating 1b forms the other half of the through-hole 2 through which the pipe 6 passes and about half.

グレーチング1aとグレーチング1bとには、鍔付きフラットバーが半円形の切欠き部分に組み合わされる。鍔付きフラットバーは、図2のように、鋼板製の平板をグレーチング1aとグレーチング1bに形成した半円形の切欠きの、その円形の曲率に合わせて半円形に曲げたフラットバー3を縁取り部材として備え、そのフラットバー3の外周囲であって上下方向の途中部分に鋼板製の水平な鍔7を溶接などによって固定して構成されている。   In the grating 1a and the grating 1b, a flat bar with a hook is combined with a semicircular cutout portion. As shown in FIG. 2, the flat bar with a flange is a semi-circular cutout formed by forming a flat plate made of a steel plate in the grating 1a and the grating 1b, and a flat bar 3 bent in a semicircular shape in accordance with the circular curvature. And a horizontal rod 7 made of a steel plate is fixed to the outer periphery of the flat bar 3 in the middle in the vertical direction by welding or the like.

このような鍔付きフラットバーは、グレーチング1aとグレーチング1bとの二個一組を製作する。その二個の鍔付きフラットバーの形状は概ね左右対称である。   Such a flat bar with a hook is produced as a pair of a grating 1a and a grating 1b. The shape of the two flat bars with hooks is generally symmetrical.

このような鍔付きフラットバーは、以下のようにグレーチング1aとグレーチング1bとの上に置かれる。即ち、根太15の間に上下方向に通された配管6の周囲に、グレーチング1aとグレーチング1bとを、配管を半円形の切欠きで囲うようにして配置する。その根太15にそのグレーチング1aとグレーチング1bとをボルトなどによって着脱自在に設置する。   Such a barbed flat bar is placed on the grating 1a and the grating 1b as follows. That is, the grating 1a and the grating 1b are arranged around the pipe 6 passed in the vertical direction between the joists 15 so as to surround the pipe with a semicircular notch. The grating 1a and the grating 1b are detachably installed on the joists 15 with bolts or the like.

このようにすると、配管6を貫通させることの出来る貫通孔2が円形状に床12に現れる。その貫通孔2の直径は配管と貫通孔の縁との間に予め定めたクリアランスが生じるように決められる。   If it does in this way, the through-hole 2 which can penetrate the piping 6 will appear in the floor 12 in circular shape. The diameter of the through hole 2 is determined so that a predetermined clearance is generated between the pipe and the edge of the through hole.

次に、鍔付きフラットバーの鍔7を、図2のように、各グレーチング1a,1bに乗せて各フラットバー3を貫通孔2の縁沿いに配置する。その配置状態で一旦各グレーチング1a,1bに鍔付きフラットバーを紐や針金や仮溶接で仮据付する。   Next, as shown in FIG. 2, the flat bar 3 with the hook is placed on the gratings 1 a and 1 b and the flat bars 3 are arranged along the edges of the through holes 2. In the arrangement state, a flat bar with a hook is temporarily installed on each grating 1a, 1b by a string, a wire, or temporary welding.

現実的には、鍔付きフラットバーの製作及びグレーチング1a,1bの切欠きの製作及びグレーチング1a,1bへの鍔付きフラットバーの仮据付作業は、制作設備や製作環境の良い工場で行い、鍔付きフラットバーが仮据付されたグレーチング1a,1bをその工場から据付現場の操作架台10上に搬入して、配管6の周囲をフラットバー3が囲むようにグレーチング1a,1bを根太15上にボルトなどで着脱自在に設置して、フラットバー3と配管6との間隔を予め定めた値以上か否かを測定する。   Realistically, the manufacture of flat bars with hooks, the notches of the gratings 1a and 1b, and the temporary installation of the flat bars with hooks to the gratings 1a and 1b are performed in a factory with a good production facility and production environment. The gratings 1a and 1b with the attached flat bar are temporarily transferred from the factory onto the operation stand 10 at the installation site, and the gratings 1a and 1b are bolted onto the joists 15 so that the flat bar 3 surrounds the pipe 6. It installs so that attachment or detachment is possible, etc., and measures whether the space | interval of the flat bar 3 and the piping 6 is more than a predetermined value.

その測定値が予め定めた値以上であれば正常であるから、貫通孔2の縁と配管6の外周囲との間の間隔は正常値であるとして本据付を施工する。本据付は以下の通りである。   If the measured value is equal to or greater than a predetermined value, it is normal. Therefore, the installation is performed assuming that the interval between the edge of the through hole 2 and the outer periphery of the pipe 6 is a normal value. The installation is as follows.

即ち、鍔7がグレーチング1aに接触する鍔7の最低3箇所をグレーチング1aに本溶接する。もう一方の鍔付きフラットバーは、同様にグレーチング1bに溶接する。このような溶接施工によれば、フラットバー3が鍔7でグレーチング1aやグレーチング1bに落下しないように支持されるので、その落下を確実に防止するためにフラットバー3をグレーチング1aやグレーチング1bに多数点で溶接することの要求が回避でき、溶接施工が容易である。   That is, at least three places of the flange 7 where the flange 7 contacts the grating 1a are finally welded to the grating 1a. The other barbed flat bar is similarly welded to the grating 1b. According to such welding work, the flat bar 3 is supported by the rod 7 so as not to fall on the grating 1a or the grating 1b. Therefore, the flat bar 3 is attached to the grating 1a or the grating 1b in order to prevent the fall reliably. The requirement for welding at multiple points can be avoided and welding is easy.

このようにすると、フラットバー3の一部分が貫通孔2からグレーチング1aとグレーチング1bの上方に突き出て、グレーチング1aやグレーチング1b上の器具や作業員が貫通孔2に落下する事故を防げる。その事故防止のために必要な突き出し高さは予め決めてフラットバー3に鍔7を取り付ける。なお、鍔7よりも下方のフラットバー3の部分は貫通孔2の開口の内側に入っていて、水平方向でグレーチング1aやグレーチング1bに重なっている。   If it does in this way, a part of flat bar 3 will protrude from the through-hole 2 above the grating 1a and the grating 1b, and the accident which the instrument and worker on the grating 1a and the grating 1b fall into the through-hole 2 can be prevented. The protrusion height necessary for preventing the accident is determined in advance, and the flange 7 is attached to the flat bar 3. In addition, the part of the flat bar 3 below the flange 7 is inside the opening of the through hole 2 and overlaps the grating 1a and the grating 1b in the horizontal direction.

配管6が貫通孔2の中央部分から外れて、図3のように、配管6が一方のグレーチング1b側にずれて貫通している場合には、配管6の外周囲とフラットバー3との間の最短間隔を測る。その測定結果、配管6の外周囲とフラットバー3との間の最短間隔が予め決めた値を超えない場合には、再据付作業を行う。   When the pipe 6 is disengaged from the central portion of the through hole 2 and the pipe 6 is shifted to the one grating 1b side as shown in FIG. 3, it is between the outer periphery of the pipe 6 and the flat bar 3. Measure the shortest interval. As a result of the measurement, if the shortest distance between the outer periphery of the pipe 6 and the flat bar 3 does not exceed a predetermined value, re-installation work is performed.

再据付作業は、まず、グレーチング1a,1bに対する鍔付きフラットバーの仮据付を解除して、グレーチング1a,1bから鍔付きフラットバーを取り外す。次に、配管6の貫通箇所が貫通孔2の中心から外れた方向のグレーチング1bを根太15から取り外す。   In the re-installation work, first, the temporary installation of the flat bar with a hook on the gratings 1a and 1b is released, and the flat bar with a hook is removed from the gratings 1a and 1b. Next, the grating 1 b in the direction in which the penetration portion of the pipe 6 is off the center of the through hole 2 is removed from the joist 15.

次に、図3のように、グレーチング1bの縁にU字状の切欠きを貫通孔2の一部分として形成することで配管の貫通箇所が外れた方向へ貫通孔2を拡大する。そのU字状の切欠きの丸みの部分はグレーチング1aに形成した半円形と同じ曲率の半円形である。   Next, as shown in FIG. 3, the U-shaped notch is formed as a part of the through-hole 2 at the edge of the grating 1 b, so that the through-hole 2 is expanded in the direction in which the through-hole of the pipe is removed. The rounded portion of the U-shaped notch is a semicircle having the same curvature as the semicircle formed in the grating 1a.

次に、図3のように、U字状の切欠きが形成されたグレーチング1bを、U字状の切欠きの開口部分がグレーチング1aの切欠きに連続するように、グレーチング1aに隣接して敷詰める。そのグレーチング1bを根太15にボルトなどで着脱自在に固定する。   Next, as shown in FIG. 3, the grating 1b formed with the U-shaped notch is adjacent to the grating 1a so that the opening of the U-shaped notch is continuous with the notch of the grating 1a. Lay down. The grating 1b is detachably fixed to the joist 15 with a bolt or the like.

次に、図4のように、配管6の外周囲に外してあった鍔付きフラットバーを、フラットバー3の囲いの中心部に配管6が通過するように配置し、既述の要領で各グレーチング1a,1bに仮据付する。このような配置によって、フラットバー3と配管6との間の間隔が所望の所定の距離に保たれることを確認する。その後に、鍔付きフラットバーを既述の要領でグレーチング1a,1bに本据付する。   Next, as shown in FIG. 4, the flanged flat bar that has been removed from the outer periphery of the pipe 6 is arranged so that the pipe 6 passes through the center of the enclosure of the flat bar 3, and each of the steps is as described above. Temporarily installed on the gratings 1a and 1b. By such an arrangement, it is confirmed that the distance between the flat bar 3 and the pipe 6 is maintained at a desired predetermined distance. Thereafter, the barbed flat bar is permanently installed on the gratings 1a and 1b as described above.

本据付後においては、図4のように、グレーチング1a寄りのフラットバー3の外周囲に、グレーチング1aの切欠きの縁との間で、隙間が発生するが、その隙間は、鍔7で上方から覆われて器具や作業員の落下事故を防止できる。   After the actual installation, as shown in FIG. 4, a gap is generated between the flat bar 3 near the grating 1a and the notched edge of the grating 1a. It can be prevented from falling accidents of equipment and workers.

本実施例では、配管6が設置されてから各グレーチング1a,1bと鍔付きフラットバーを設置することについて述べたが、配管を設置する前に各グレーチング1a,1bと鍔付きフラットバーを据付て、貫通孔2に配管6を貫通させる際に、配管とフラットバーとの間隔を測定して本据付に移行するか再据付に移行するかを決めても良い。さらに、グレーチング1aの切欠きを再作成するようにしたが、U字状の切欠きが施された新たなグレーチングにグレーチング1aを置き換えるようにしても良い。   In this embodiment, it has been described that the gratings 1a and 1b and the flat bar with the hook are installed after the pipe 6 is installed. However, before installing the pipes, the gratings 1a and 1b and the flat bar with the hook are installed. When penetrating the pipe 6 through the through-hole 2, the interval between the pipe and the flat bar may be measured to determine whether to shift to the main installation or to re-installation. Furthermore, although the notch of the grating 1a is recreated, the grating 1a may be replaced with a new grating having a U-shaped notch.

また、原子力発電所の運転が開始される、あるいは運転前の試験で、配管6を使用してみた際に、配管の膨張等で配管6の位置が変位して、フラットバー3と配管6との間隔が所望の間隔を保てない場合には、既述のように再据付を行って、フラットバー3と配管6との干渉事故が発生しないようにしても良い。   Further, when the operation of the nuclear power plant is started or when the pipe 6 is used in a test before the operation, the position of the pipe 6 is displaced due to the expansion of the pipe, and the flat bar 3 and the pipe 6 If the desired distance cannot be maintained, re-installation may be performed as described above so that an interference accident between the flat bar 3 and the pipe 6 does not occur.

本実施例での、各グレーチング1a,1bに対する鍔7の取り付けは、溶接によったが、ボルトとナットによって着脱自在に取り付けても良い。   Although the attachment of the flange 7 to each grating 1a, 1b in this embodiment is based on welding, it may be attached detachably with bolts and nuts.

本実施例によれば、フラットバー3は図2に示す通り、グレーチング1を貫通する配管の周りに、貫通孔2へ作業員が落下するのを防止することを目的として設置され、フラットバー3の外周に鍔7を溶接し、鍔7をグレーチング1a,1b上に置くことでフラットバー3を据付る。そのためにその据付が容易である。   According to the present embodiment, as shown in FIG. 2, the flat bar 3 is installed around the piping that penetrates the grating 1 for the purpose of preventing an operator from dropping into the through hole 2. The flat bar 3 is installed by welding the gutter 7 to the outer periphery of the gutter and placing the gutter 7 on the gratings 1a and 1b. Therefore, the installation is easy.

さらに、鍔付きフラットバーが同じ形状の2つの部品から構成され、フラットバー3は貫通孔2の形状に一致するように加工されており、配管6の貫通部のグレーチング1a,1bが、配管6に対して対称に2つに別れており、配管6側の境界において配管6の口径より大きい半円形の貫通孔2を有している。   Furthermore, the flat bar with a hook is composed of two parts having the same shape, the flat bar 3 is processed so as to match the shape of the through hole 2, and the gratings 1 a and 1 b of the through part of the pipe 6 are connected to the pipe 6. However, it has a semicircular through hole 2 larger than the diameter of the pipe 6 at the boundary on the pipe 6 side.

さらに、フラットバー3の外周の鍔7が、フラットバー3の外周の全体を覆う長さで、鍔7の幅が一定でグレーチング1a,1bの格子の短辺一つ分以上の長さであり、フラットバー3をグレーチング1a,1bに据付る際に、フラットバー3をグレーチング1a,1b上に設置し、鍔7とグレーチング1a,1bが接する箇所の内、最低3箇所を溶接することでグレーチング1a,1bに固定できる。この点も、配管貫通部構造の据付の容易化に貢献する。   Furthermore, the flange 7 on the outer periphery of the flat bar 3 is a length that covers the entire outer periphery of the flat bar 3, the width of the flange 7 is constant, and the length is equal to or longer than one short side of the gratings of the gratings 1a and 1b. When installing the flat bar 3 on the gratings 1a and 1b, the flat bar 3 is installed on the gratings 1a and 1b, and the grating is welded at least three of the points where the flange 7 and the gratings 1a and 1b are in contact with each other. It can be fixed to 1a, 1b. This also contributes to easy installation of the pipe penetration structure.

さらに、配管6の位置が移動したときに、図3のように配管6と干渉した方のグレーチング1bの貫通孔2を広げ、配管6と貫通孔2の縁取りとしてのフラットバー3との間のクリアランスを確保した上で、図4のように再び2つの鍔付きフラットバーをグレーチング1a,1b上に置くことで、グレーチング1a,1b及び鍔付きフラットバーを再製作することなく配管6との干渉を回避できる。   Further, when the position of the pipe 6 is moved, the through hole 2 of the grating 1b that interferes with the pipe 6 is widened as shown in FIG. 3, and the pipe 6 and the flat bar 3 as an edge of the through hole 2 are expanded. After securing the clearance, placing the two flat bars with hooks again on the gratings 1a and 1b as shown in FIG. 4 will interfere with the pipe 6 without remanufacturing the gratings 1a and 1b and the flat bars with hooks. Can be avoided.

本発明は、例えば、原子力発電所のタービン建屋内に設置される配管が操作架台の床面を操作架台に接触することなく貫通する貫通部構造に適用される。   The present invention is applied to, for example, a penetration structure in which a pipe installed in a turbine building of a nuclear power plant penetrates the floor surface of an operation base without contacting the operation base.

1,1a,1b…グレーチング、2…貫通孔、3…フラットバー、4…すみ肉溶接、5…全周すみ肉溶接、6…配管、7…鍔、10…操作架台、12…床。   DESCRIPTION OF SYMBOLS 1, 1a, 1b ... Grating, 2 ... Through-hole, 3 ... Flat bar, 4 ... Fillet welding, 5 ... Whole circumference fillet welding, 6 ... Piping, 7 ... 鍔, 10 ... Operation stand, 12 ... Floor.

Claims (2)

配管又は機器を貫通させる床の箇所に床材として隣りあわせで敷設された少なくとも2個のグレーチングにおいて、
前記配管貫通孔の一部分が一方の前記グレーチングの縁に設けられ、前記貫通孔の他の部分が前記縁に隣接する他方のグレーチングの縁に設けられている床の配管又は機器の貫通部構造に用いるグレーチング。
In at least two gratings laid side by side as flooring at the floor where piping or equipment penetrates,
Part of the pipe through-hole is provided at one edge of the grating, and the other part of the through-hole is provided at the edge of the other grating adjacent to the edge. Grating used.
前記請求項1において、前記配管貫通孔の一部分が部分円弧状であり、前記配管貫通孔の他の部分がU字状である床の配管又は機器の貫通部構造に用いるグレーチング。   2. The grating according to claim 1, wherein a part of the pipe through-hole has a partial arc shape and the other part of the pipe through-hole has a U-shape.
JP2010157433A 2010-07-12 2010-07-12 Operation stand Expired - Fee Related JP5401406B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016061022A (en) * 2014-09-16 2016-04-25 株式会社ダイクレ Structure for preventing urination by animals at root of column
KR102690203B1 (en) * 2020-04-01 2024-08-01 삼성중공업 주식회사 Device for preventing drooping of grating

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JPH0212583U (en) * 1988-07-11 1990-01-25
JPH11315595A (en) * 1998-02-18 1999-11-16 Ibiden Co Ltd Fire-resistive complex building material and fire-resistive composite floor material
JP2002098379A (en) * 2000-09-26 2002-04-05 Hitachi Plant Eng & Constr Co Ltd Floor structure of clean room and plate member

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0212583U (en) * 1988-07-11 1990-01-25
JPH11315595A (en) * 1998-02-18 1999-11-16 Ibiden Co Ltd Fire-resistive complex building material and fire-resistive composite floor material
JP2002098379A (en) * 2000-09-26 2002-04-05 Hitachi Plant Eng & Constr Co Ltd Floor structure of clean room and plate member

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016061022A (en) * 2014-09-16 2016-04-25 株式会社ダイクレ Structure for preventing urination by animals at root of column
KR102690203B1 (en) * 2020-04-01 2024-08-01 삼성중공업 주식회사 Device for preventing drooping of grating
KR102690200B1 (en) * 2020-04-06 2024-08-01 삼성중공업 주식회사 Device for preventing drooping of grating

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