JP2006342492A - Method of penetrating pipe or device through floor, penetration section structure of floor, and collared flat bar or grating used for the structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily construct the structure of a penetration section for a pipe in a grating. <P>SOLUTION: A semi-circular cutout is formed at the edge of each of gratings 1a and 1b laid down on a floor to form a penetration hole 2. A collared flat bar with a horizontal collar 7 is fitted to a flat bar 3 vertical to the penetration hole 2. The pipe 6 is surrounded by the flat bar 3, and the flat bar 3 is supported by the collar 7. When the penetration hole 2 is enlarged to prevent a contact accident from occurring between the pipe 6 and the edge of the penetration hole 2, an excessive opening of the penetration hole 2 is covered by the collar 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method and structure for penetrating pipes in a floor and components used in the structure.

  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.

  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).

  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).

Japanese Patent Application Laid-Open No. 08-086037 Japanese Patent Application Laid-Open No. 11-241489

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  Means for solving the problems of the present invention include a floor constructed by laying a plurality of flooring materials on the floor surface, a through-hole formed over the plurality of flooring materials, from the through-hole to the floor surface. A floor pipe or a device penetration structure comprising a plurality of edging members protruding upward and a plurality of gutter members fixed to the outer periphery of each edging member.

  Further, in the method of providing a through hole in the floor laid on the floor surface, and through the pipe through the through hole to the floor through the equipment, in the boundary portion between the floor materials adjacent to each other, The common through hole is formed across the floor materials, and when the gap between the edge of the through hole and the pipe is insufficient, the floor material is formed on one of the floor materials located on the insufficient side.鍔 which expanded the portion of the through hole to the lacking side, and fixed the opening portion of the through hole expanded along with the expansion of the through hole to a flat bar provided between the pipe and the edge of the through hole It is a method of penetrating floor piping or equipment covered by a.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  In this way, a part of the flat bar 3 protrudes from the through hole 2 to the upper side of the grating 1a and the grating 1b, thereby preventing an accident that a tool or a worker on the grating 1a or the grating 1b falls into the through hole 2. 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.

  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. If the shortest interval between the outer periphery of the pipe 6 and the flat bar 3 does not exceed a predetermined value as a result of the measurement, the most installation work is performed.

  First, the temporary installation of the hooked flat bar on the gratings 1a and 1b is released, and the hooked flat bar 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.

  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.

  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.

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 central portion 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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

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) 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) 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. 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). It is a perspective view of the operation stand floor vicinity which applied the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a, 1b ... Grating, 2 ... Through-hole, 3 ... Flat bar, 4 ... Fillet welding, 5 ... Whole circumference fillet welding, 6 ... Piping, 7 ... Rod, 10 ... Control stand, 12 ... Floor.

Claims (9)

A floor constructed by laying a plurality of flooring materials on the floor; and
A through hole formed across the plurality of flooring materials;
A plurality of edging members arranged to protrude above the floor surface from the through hole;
A plurality of eaves members fixed to the outer periphery of each edging member;
Floor piping or equipment penetration structure with   2. The through hole according to claim 1, wherein the through hole is a partial arc-shaped through portion formed at an edge of the floor material, and another floor material adjacent to the floor material, the other adjacent to the edge. A floor pipe or a through part structure of equipment having a U-shaped through part formed at the edge of the flooring.   3. The edge member according to claim 1, wherein the rim member is a flat bar bent in a partial arc shape, and the flange member is fixed to an outer periphery of the flat bar and opens at an outer periphery of the flat bar. A floor piping having a shape covering the opening of the through hole or a through portion structure of equipment.   4. The floor piping according to claim 1, wherein the flooring is a grating, or a penetration structure of equipment. In a method of providing a through-hole in a floor laid on a floor surface with a plurality of flooring materials, and penetrating the pipe through the floor through piping or equipment,
Forming a common through-hole across each floor material at the boundary portion between the floor materials adjacent to each other;
When the gap between the edge of the through-hole and the pipe is insufficient, the portion of the through-hole formed in the one floor material located on the insufficient side is expanded to the insufficient side,
A method of penetrating a floor pipe or a device, in which an opening portion of the through hole enlarged with the enlargement of the through hole is covered with a ridge fixed to a flat bar provided between the pipe and an edge of the through hole.   A flat bar provided in an annular shape between a through hole provided in the grating and a pipe passing through the through hole, and provided in an outer periphery of the flat bar to cover the through hole portion in the outer periphery of the flat bar A flat bar with a hook used for a floor pipe or a through-hole structure of a device provided with a wide paddle.   The floor according to claim 6, wherein the flat bar is composed of two semicircular parts having a size that can be arranged around the pipe in the through hole, and the ridge is provided for each of the two parts. Flat bar with flanges used for pipe or equipment penetration structure. In at least two gratings laid side by side as floor materials 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. 9. The grating according to claim 8, 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.

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