JP2011064288A - Piping restricted support - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping support structure which is larger in strength and moreover smaller in welding area than an conventional example and to securely restrict and support a piping against a displacement due to thermal expansion of the piping and earthquake in a restricted support of the piping laid in a plant. <P>SOLUTION: In the piping support structure which provides at least one pair of piping lugs which are fixed by interposing a shaft around outer periphery of the piping and a supporting structure with which the piping lugs engage, the piping lugs have a substantially U-shaped cross section and have a notch engaging with the supporting structure around the outer periphery. The piping support structure is configured so as to restrict and support the piping in an axial direction of the piping and one direction or two directions which perpendicularly intersect with the axial direction by engaging the supporting structure with the notch of the piping lugs. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention has a pipe lug used for restraining displacement in the axial direction of the pipe and in one or two directions perpendicular to the axis in the pipe laid in various plants such as power generation, chemical, oil and waste disposal. The present invention relates to a piping restraint support.

  In order to prevent piping laid in various plants from moving and being damaged by an external force such as an earthquake or thermal displacement, there is a piping restraint support as a means for restraining these motions.

  The restraint support shown in FIGS. 7 and 8 uses the support structure 3 so as to surround a rectangular space through which the pipe 2 passes. Four pipe lugs (support metal fittings) 1 are individually adjusted in position and fixed by welding at the four positions of the pipe 2 facing the horizontal beam 7 and the vertical column 8 constituting the support structure 3. Yes. The lower pipe lug 1 is non-fixedly placed on the upper surface of the lower horizontal beam 7 constituting the support structure 3. The other piping lugs 1 are also surrounded by and in contact with the support structure 3. With this structure, position displacement in two directions (in this case, up and down, left and right directions) perpendicular to the axis of the pipe 2 can be restricted. Reference numeral 4 denotes an embedded metal that is embedded in the housing 5 and supports the vertical column 8.

  The restraint support in FIGS. 9 and 10 realizes restraint of axial displacement of the pipe 2 by joining the pipe attachment 6 to the horizontal pipe lug 1 of the conventional example shown in FIGS. 7 and 8. The pipe attachment 6 is welded and joined to each of the two pipe lugs 1 in the horizontal direction, and is further combined with a vertical column 8 of the support structure 3 through a notch that meshes in the axial direction of the pipe 2. For this reason, compared with the example of FIG. 7, FIG. 8, the positional displacement of the axial direction of the piping 2 can be restrained further. A similar configuration is disclosed in Patent Document 1.

JP-A-61-218887

  In the case of a nuclear power plant where the social importance of equipment is high and high reliability is required, it takes a lot of time for welding work and its inspection. Therefore, it is required to reduce the welded portion and the amount of welding work as much as possible. Further, in a local welding process, in a place where the work space is small, the welding work becomes difficult and the accuracy of welding may be lowered, and it is necessary to reduce the field welding work in order to further improve the quality.

  Since the pipe attachment 6 shown in the conventional example is welded and fixed to the pipe lug, there is a problem that the number of welds increases. Furthermore, the pressure receiving area when a load is applied in the vertical direction of the pipe lug is small, and there is a possibility of deformation due to a large compressive stress.

  An object of the present invention is to provide a pipe support structure having a pipe lug that can reliably restrain the displacement of the pipe in the axial direction and the axial orthogonal direction 1 or 2 with respect to the thermal expansion displacement, seismic displacement, etc. of the pipe. That is.

  The present invention relates to a pipe support structure having a pipe, a pair of pipe lugs fixed to the outer periphery of the pipe with a pipe central axis sandwiched therebetween, and a support structure with which the pipe lug engages. A notch that engages with an object, the notch of the pipe lug and the support structure are engaged, and the pipe is restrained and supported in the pipe axis direction and one direction orthogonal thereto. .

  In addition, in a pipe support structure having a pipe, two pairs of pipe lugs fixed on the pipe outer periphery with the pipe central axis interposed therebetween, and a support structure with which the pipe lug engages, the pipe lug is arranged on the outer periphery of the support structure. A notch for engaging with the pipe lug and engaging the notch of the pipe lug with the support structure to restrain and support the pipe in the pipe axis direction and two directions orthogonal thereto.

  In the pipe support structure, the two pairs of pipe lugs are arranged substantially orthogonal to each other in a plane orthogonal to the pipe lugs.

  In the pipe support structure, the pipe lug is provided with a notch in a lateral direction of a U-shaped plate formed in a substantially U-shaped cross section.

  Further, in the pipe support structure, the pipe lug is characterized in that a flat plate is fixed to both ends of a U-shaped plate having a substantially U-shaped cross section.

  The pipe support structure according to the present invention has a structure that restrains the axial displacement of the pipe by engaging the notch provided in the pipe lug with the support structure, so that the pipe lug and the support structure need not be welded. It becomes. Moreover, by providing a notch in the piping lug itself, the welding work of another member is reduced, and the load resistance strength of the piping lug is increased.

  Furthermore, since the piping and the piping lug are welded at the factory, no on-site welding work is required, so that the installation accuracy can be improved.

It is a perspective view of a piping lug in the present invention. It is a perspective view of the modification of the piping lug in this invention. It is a front view of the piping support structure of Example 1 in the present invention. FIG. 4 is a side view of FIG. 3. It is a front view of the piping support structure of Example 2 in the present invention. FIG. 6 is a side view of FIG. 5. It is a front view of the piping support structure of 2 direction restraint by a prior art example. FIG. 8 is a side view of FIG. 7. It is a front view of the piping support structure of 3 direction restraint by a prior art example. FIG. 10 is a side view of FIG. 9.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 and 2 show piping lugs 11 and 14 used in each embodiment of the present invention. FIG. 1 shows the structure of a pipe lug 11 provided with a notch 13 according to the present invention. A notch 13 is formed in a perpendicular direction at the bottom of the U-shaped plate 12 bent into a U-shape. The shape of the notch 13 is formed according to the horizontal beam 7 of the supporting structure 3 to be engaged.

  FIG. 2 shows a pipe lug 14 according to a modification, in which a flat plate 15 is welded to both sides of the U-shaped plate 12 bent into a U-shape in FIG. Since it is welded to the pipe 2 over the entire circumference of the pipe lug 14, the fixing strength is increased.

  The piping lugs 11 and 14 shown in FIGS. 1 and 2 are used as follows. 3 and 4 show a support structure in which the pipe 2 is constrained in the pipe axis direction and the one axis orthogonal direction.

  In FIG. 3, the pipe lugs 11 are fixed at two places above and below the pipe 2. The fixing means between the pipe lug 1 and the pipe 2 is by welding.

  Also, each steel material perpendicular to the embedded metal 4 embedded and fixed in the housing 5 is used for each vertical column 8, and a horizontal beam 7 made of two upper and lower steel materials is welded between the vertical columns 8 to form a pipe lug. The support structure 3 is configured as a whole by engaging and fixing with the notches 13 of 11.

  For this reason, a rectangular space surrounded by the upper and lower horizontal beams 7 and the left and right vertical columns 8 is formed in the support structure 3 and is used as a passage through which the pipe 2 passes.

  According to the first embodiment, the pipe 2 is fixed to the pipe lug 11, and the pipe lug 11 is fixed to the support structure 3 in the direction of the pipe axis and the direction orthogonal to the pipe axis. The movement in the restraining direction is also prevented against the movement due to the external force such as the above or the thermal displacement of the pipe 2 itself, and is restrained at a fixed position and supported by the support structure 3.

  The second embodiment shown in FIGS. 5 and 6 is a pipe support structure in which the displacement of the pipe 2 in the axial direction and the two directions orthogonal to the axis are restrained.

  As in the first embodiment, the vertical column 8 of the support structure 3 is fixed to the embedded metal 4 provided in the housing 5, and the pipe lug 11 fixed to the pipe 2 is formed in the rectangular space formed by the support structure 3. Is placed.

  In the second embodiment, the pipe lugs 11 are welded to the top, bottom, left and right of the pipe as compared with the first embodiment, and the pipe lugs 11 are engaged with the horizontal beams 7 and the vertical columns 8 of the support structure 3 and combined. Yes.

  According to such a configuration, the pipe 2 is fixed to the pipe lug 11, the pipe lug 11 is fixed to the support structure 3, the movement in the pipe axial direction and the two directions orthogonal to the axis is reliably prevented, and the pipe 2 is It is restrained at a fixed position and is stably supported by the support structure 3.

  The piping support structure of the present invention can reduce the number of on-site work steps by reducing the amount of welding work. In addition, the structural reliability of the piping lugs can be improved by reducing the amount of welding work, and trouble potential during plant operation can be reduced. In addition, the use of factory-processed products for the piping lugs will improve local installation by reducing local adjustment work.

1, 11, 14 Piping lug 2 Piping 3 Support structure 4 Embedded metal 5 Housing 6 Piping attachment 7 Horizontal beam 8 Vertical column 12 U-shaped plate 13 Notch 15 Flat plate

Claims (5)

In a pipe support structure having a pipe, a pair of pipe lugs fixed to the outer periphery of the pipe with the pipe central axis interposed therebetween, and a support structure with which the pipe lug engages,
The pipe lug has a notch that engages with the support structure on the outer periphery, and the pipe lug is engaged with the support structure to connect the pipe to the pipe axial direction and one direction orthogonal thereto. A pipe support structure characterized by being restrained and supported. In a pipe support structure having a pipe, a pair of pipe lugs fixed on the outer periphery of the pipe with the pipe central axis interposed therebetween, and a support structure with which the pipe lug engages,
The pipe lug has a notch that engages with the support structure on an outer periphery, and the pipe lug is engaged with the support structure so that the pipe is in the pipe axial direction and in two directions orthogonal to the pipe axial direction. A pipe support structure characterized by being restrained and supported.   3. The pipe support structure according to claim 2, wherein the two pairs of pipe lugs are arranged substantially orthogonal to each other in a plane orthogonal to the pipe lugs.   The pipe support structure according to any one of claims 1 to 3, wherein the pipe lug is provided with a cutout in a lateral direction of a U-shaped plate having a substantially U-shaped cross section. Structure.   5. The pipe support structure according to claim 4, wherein the pipe lug has a flat plate fixed to both ends of a U-shaped plate having a substantially U-shaped cross section.

Images