JP2008196542A - Piping support structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping support structure completely fixing piping by using friction force acting between a plurality of members including the piping. <P>SOLUTION: The piping support structure is constituted of: the piping 1; a piping support member 2 supporting the piping 1; a fixing metal fitting 3 wound around an upper half part of the piping 1; a bolt 4 and nut 5 fastening both ends of the fixing metal fitting 3 to the piping support member 2; and a friction force body 6 disposed between the piping 1 and the piping support member 2, and between the piping 1 and the fixing metal fitting 3. The friction force body 6 may be disposed between the piping support member 2 and the nut 5, and between the fixing metal fitting 3 and the bolt 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pipe support structure that fixes a pipe to a pipe support member, and more particularly to a pipe support structure that can completely fix a pipe.

  Piping provided in power generation facilities, etc. has a completely fixed end that does not displace in either direction when the fixed part to the pipe support member receives external forces such as its own weight, mechanical load, fluid vibration, thermal expansion, and earthquake. It is required to be.

  As such a pipe support structure, conventionally, as shown in FIG. 4, a pipe lug 102 is welded to the entire periphery of the pipe 101, and the outer periphery of the pipe lug 102 is welded to the support member 103 (see Patent Document 1). 5), as shown in FIG. 5, a sleeve 113 is installed in a through-hole 112 that penetrates the wall 111 of the building, and a grout with high adhesion strength is formed between the sleeve 113 and the pipe 101 without shrinkage or low shrinkage. As shown in FIGS. 6 (a) and 6 (b), the pipe 101 is sandwiched between the pipe fixture 123 composed of the base 121 and the gripping part 122 and gripped. By engaging the upper end 122 a of the portion 122 with the groove 124 a of the locking member 124, the displacement of the pipe 101 is restrained by the frictional force generated on the contact surface between the pipe 101 and the leg of the pipe fixture 123. (See Patent Document 3.) It has been proposed.

Note that, as shown in FIGS. 7A and 7B, a comparatively small general piping support structure is configured such that a fixed portion of the piping 101 is brought into contact with the piping support member 131 and the upper half portion of the piping 101 is used. In the related art, a belt-like fixing bracket 132 is wound around and both ends of the fixing bracket 132 are fastened to the pipe support member 131 using a plurality of bolts 133 and nuts 134, respectively. Also, there is a conventional one in which bolts 133 are welded to both ends of the fixing bracket 132 in advance, and both ends of the fixing bracket 132 are fastened to the pipe support member 131 with the bolt 133 and a nut 134 screwed to the bolt 133. More known (see Patent Document 4).
Japanese Opening Hei 9-170680 JP 2000-274561 A JP-A-9-296882 JP-A-9-296882

  The pipe support structure shown in FIG. 4 requires preparation of welding equipment and curing of the welded part when welding the pipe 101 and the pipe lug 102 and welding the pipe lug 102 and the support member 103, and there are many welding operations themselves. Therefore, there is a problem that it takes a long time for installation. In addition, since this piping support structure is difficult to remove once it has been constructed, it cannot be installed near a piping flange or equipment nozzle that requires maintenance. Since it cannot be arbitrarily installed in the part, there is also a problem that there are many cases where the design of the reactor becomes difficult. Further, since the welding work is difficult in a place where the work space is small, there is a possibility that the welding accuracy becomes low and the strength sufficient to restrain the displacement of the pipe cannot be obtained. Furthermore, since it is necessary to undergo a welding inspection at the welding location, a lot of time is also spent on the inspection work.

  The pipe support structure shown in FIG. 5 supports the pipe 101 penetrating into the through-hole 112, and the pipe 101 can be applied only to a portion that passes through the wall 111 or the housing of the building. There is a problem of being.

  The pipe support structure shown in FIG. 6 has a restoring force in the direction of expanding outward in an attempt to return to the original shape at the stage where the groove 124a of the locking member 124 is engaged with the upper end 122a of the grip part 122 in which the pipe 101 is sandwiched. Since it acts on the gripping part 122, the frictional force acting on the contact surface between the pipe 101 and the gripping part 122 is reduced, and there is a problem that the pipe 101 is likely to be displaced in the axial direction and the twisting direction when receiving an external force.

  The pipe support structure shown in FIG. 7 restrains the pipe 101 only with the frictional force acting between the pipe 101 and the pipe support member 131 and the frictional force acting between the pipe 101 and the fixing bracket 132. There is a problem that slip is likely to occur between the members, and the pipe 101 is easily displaced in the axial direction and the twisting direction when an external force is applied.

  This invention is made | formed in view of the present condition of this prior art, The place made into the subject is piping which can fix piping completely using the frictional force which acts between several members including piping. It is to provide a support structure.

  In order to achieve the above object, according to the present invention, firstly, in a pipe support structure comprising a pipe, a pipe support member that supports the pipe, and a pipe fixing member that fixes the pipe to the pipe support member, A configuration in which a frictional force body is interposed between the pipe support member and between the pipe and the pipe fixing member to increase the frictional force acting between the members as compared with the case where the members are brought into direct contact with each other. I made it.

  According to such a configuration, since the frictional force acting between the pipe and the pipe support member and the frictional force acting between the pipe and the pipe fixing member are increased by sandwiching the frictional force body, the pipe and the pipe support member Unlike the case where the pipe and the pipe fixing member are in direct contact with each other, it is possible to prevent displacement of the pipe in the axial direction and the twist direction due to external force. In addition, when fixing the pipe, it is only necessary to fasten the pipe support member and the pipe fixing member using bolts and nuts. Therefore, it is easier to install the pipe than when welding or when filling and solidifying the grout material. The degree of freedom of design and the ease of maintenance can be increased.

  The present invention secondly, in the first pipe support structure, the pipe fixing member comprises a fixing bracket wound around the pipe, and a bolt and a nut for fastening the fixing bracket and the pipe supporting member. The frictional force body is further sandwiched between the fixing bracket and the bolt or nut or between the pipe support member and the bolt or nut.

  According to such a configuration, not only between the pipe and the pipe support member and between the pipe and the fixture, but also between the fixture and the bolt or nut or between the pipe support member and the bolt or nut. Therefore, displacement in the axial direction and twist direction of the pipe due to external force can be more reliably prevented.

  Thirdly, according to the present invention, in the first pipe support structure, the pipe fixing member includes a fixing bracket wound around the pipe, a bolt having one end fixed to both ends of the fixing bracket, the bolt, and the piping. It consists of a nut that fastens the support member, and the frictional force body is further sandwiched between the pipe support member and the nut.

  According to such a configuration, it is possible to completely prevent slipping between the fixing bracket and the bolt, and not only between the pipe and the pipe support member and between the pipe and the fixing bracket, but also between the pipe support member and the nut. Since the acting frictional force can also be increased, the displacement of the pipe in the axial direction and the twisting direction due to an external force can be more reliably prevented. Further, since the bolts are fixed to both ends of the fixing bracket, the number of parts can be reduced, and the installation work of the piping can be facilitated.

  According to a fourth aspect of the present invention, in the pipe support structure according to any one of the first to third aspects, the frictional force body is made of a sheet-like rubber-like elastic body.

  Since the sheet-like rubber-like elastic body has a particularly high effect of increasing the coefficient of friction between the members in which the sheet-like elastic body is interposed, the pipe can be completely fixed.

  The fifth aspect of the present invention is configured such that, in the fourth pipe support structure, the rubber-like elastic body is silicon rubber.

  Silicon rubber not only has a particularly high effect of increasing the coefficient of friction between the members in which it is interposed, but also has excellent heat resistance, so various piping provided in power generation equipment, for example, a heat transfer tube support structure constituting a heat exchanger Especially suitable for.

  Sixthly, in the pipe support structure according to any one of the second and third aspects, the both ends of the fixing bracket and the pipe support member are fastened with a plurality of bolts and nuts on one side. did.

  According to such a configuration, the fastening force of the pipe to the pipe support member is increased compared to the case where the both ends of the fixing bracket and the pipe support member are fastened with one bolt and nut for each side, and the pipe support member Since the fixing bracket can be fastened by the surface, the restraining force of the pipe can be increased.

    Since the pipe support structure of the present invention sandwiches a required frictional force body between the pipe and the pipe support member and between the pipe and the pipe fixing member, the frictional force between these members can be increased, and external force The displacement of the pipe in the axial direction and twist direction can be prevented, and the pipe can be completely fixed. Also, when fixing the pipe, it is only necessary to fasten the pipe support member and the pipe fixing member using bolts and nuts, so that the installation work of the pipe can be facilitated and the design freedom compared to the case of welding or the like. The degree of maintenance and ease of maintenance can be increased.

  Hereinafter, embodiments of a pipe support structure according to the present invention will be described.

<First Embodiment>
As shown in FIGS. 1A and 1B, the pipe support structure according to the first embodiment is wound around the pipe 1, the pipe support member 2 that supports the pipe 1, and the upper half of the pipe 1. Fixing bracket 3, a plurality of bolts 4 and nuts 5 on each side for fastening both ends of the fixing bracket 3 to the pipe support member 2, between the pipe 1 and the pipe support member 2, and the pipe 1 and the fixing bracket 3 And a frictional force body 6 sandwiched between them. The fixing bracket 3, the bolt 4, and the nut 5 function as a pipe fixing member that fixes the pipe 1 to the pipe support member 2.

  The pipe support structure of the present invention can be applied to fixing an arbitrary pipe 1, but since the pipe 1 can be completely fixed, it is particularly useful as a support structure for various pipes provided in a power generation facility, for example, a heat transfer pipe constituting a heat exchanger. It is.

  The pipe support member 2 includes a contact portion 2a of the pipe 1 formed in a plate shape, and a support portion 2b that supports both ends thereof. When the pipe 1 is a heat exchanger tube of a heat exchanger provided in the power generation facility, the support 2b is provided in the main body of the heat exchanger. In this case, the pipe support member 2 can be set at an arbitrary position including the vicinity of the flange of the pipe 1 and the equipment nozzle. In the contact portion 2a, a plurality of bolt through holes on one side (three in the example of FIG. 1) are formed in two rows at intervals slightly larger than the diameter of the pipe 1.

  As shown in FIGS. 1 (a) and 1 (b), the fixing bracket 3 is formed in a belt shape having a width that is slightly narrower than the width of the contact portion 2 a of the pipe support member 2. It has a curved portion 3a formed in a U shape with a radius of curvature substantially equal to the radius of curvature, and fixing portions 3b and 3c bent outward from both ends of the curved portion 3a. A plurality (three in the example of FIG. 1) of bolt through holes are formed in the fixing portions 3b and 3c at intervals equal to the bolt through holes formed in the pipe support member 2. The fixture 3 is formed using a stainless steel plate or the like.

  As for the bolt 4 and the nut 5, those having a required strength are used in a required number. In the case where the stainless steel fixing bracket 3 is used, it is desirable to use the bolts 4 and nuts 5 made of stainless steel in order to enhance the rust prevention effect. In addition, it is further desirable to interpose a required washer in the fastening part of the bolt 4 and the nut 5 in order to prevent damage to the fastening part and to prevent the fastening part from loosening.

  As the frictional force body 6, a sheet-like rubber-like elastic body is used because the effect of increasing the frictional force of the member tube to be fastened is high. In particular, a sheet-like silicon rubber excellent in heat resistance is used for the high temperature part.

  In the pipe support structure of this example, the pipe 1 is brought into contact with the abutting portion 2a of the pipe support member 2 via the frictional force body 6, and then the fixing metal 3 is attached to the upper half of the pipe 1 via the frictional force body 6. After the bending portion 3a, the bolt 4 is passed through the bolt through hole opened in the abutting portion 2a of the pipe support member 2 and the bolt through hole opened in the fixing portions 3b and 3c of the fixing bracket 3, and the bolt The pipe 1 is fixed to the pipe support member 2 by fastening the nut 5 screwed to 4 to the compression limit at which the frictional force body 6 cannot compress any more.

  According to the pipe support structure of this example, the frictional force body 6 is sandwiched between the pipe 1 and the pipe support member 2 and between the pipe 1 and the fixture 3 and the frictional force body 6 is compressed to the compression limit. Since the fastening is performed, the frictional force acting between the pipe 1 and the pipe support member 2 and the frictional force acting between the pipe 1 and the fixing bracket 3 are increased, and elastic deformation of the frictional force body 6 is prevented. Thus, the pipe 1 can be completely fixed to the pipe support member 2.

  That is, when the pipe 1 is tightened by the pipe support member 2 and the fixing bracket 3 via the frictional force body 6, depending on the tightening conditions, a frictional force larger than the external force acting on the pipe 1 may be applied. Between the frictional force body 6 and the pipe support member 2 and between the frictional force body 6 and the fixture 3, so that the displacement of the pipe 1 in the axial direction and the twist direction is restricted. Can do. Further, depending on the tightening condition of the pipe 1, the frictional force body 6 can be compressed to the compression limit, so that the displacement in the direction orthogonal to the axis of the pipe 1 can be restricted. Therefore, the pipe 1 can be completely fixed.

  The tightening conditions of the pipe support member 2 and the fixture 3 that can generate a frictional force larger than the external force acting on the pipe 1 are as follows. 1, the fastening reaction force acting in the thickness direction of the friction force body 6 is N, the friction coefficient between the pipe 1 and the friction force body 6, and the friction between the friction force body 6 and the pipe support member 2. When the coefficient and the friction coefficient between the frictional force body 6 and the fixing bracket 3 are μ, between the pipe 1 and the frictional force body 6, between the frictional force body 6 and the pipe support member 2, and the frictional force body 6, The frictional force F generated between the fixture 3 and the fixture 3 is obtained by the following equation.

F = μN
Accordingly, the external force acting on the pipe 1 is obtained by analysis, and the tightening condition of the nut 5 with respect to the bolt 4 is set so that the frictional force F is larger than the obtained external force. Can be fixed.

  The frictional force F includes the area of the contact surface between the pipe 1 and the frictional force body 6, the contact surface between the frictional force body 5 and the pipe support member 2, the contact surface between the frictional force body 6 and the fixture 3, and the surface roughness of each contact surface. Since these are determined by conditions such as the hardness of the frictional force body 6 and the magnitude of the pipe tightening force by the bolt 4 and the nut 5, these conditions are determined so that the frictional force F is greater than the external force acting on the pipe 1. By doing so, the pipe 1 can be completely fixed. The magnitude of the piping tightening force by the bolt 4 and the nut 5 can be freely set by determining conditions such as the diameter, the number of bolts 4 used, and the tightening torque value.

  In the pipe support structure of this example, since the frictional force body 6 is sandwiched between the pipe 1 and the pipe support member 2 and between the pipe 1 and the fixing bracket 3, the frictional force acting between these members is increased. Unlike the case where the pipe 1 and the pipe support member 2 and the pipe 1 and the fixture 3 are in direct contact with each other, the displacement of the pipe 1 in the axial direction and torsional direction due to external force can be prevented, and the pipe can be completely fixed. It becomes possible. Further, when the pipe 1 is fixed, it is only necessary to fasten the pipe support member 2 and the fixing bracket 3 using the bolt 4 and the nut 5, so that the pipe is compared with the case of welding and the case of filling and solidifying the grout material. 1 installation work can be facilitated, and design freedom and ease of maintenance can be enhanced. Therefore, it can be set as the piping support structure suitable for fixation of piping provided in power generation equipment etc.

  In the example of FIG. 1, the nut 5 is disposed on the lower surface side of the contact portion 2 a constituting the pipe support member 2, but the nut 5 is fixed to the fixing bracket 3 in order to increase the fastening efficiency of the nut to the bolt 4. It can also be arranged on the upper surface side.

Second Embodiment
As shown in FIG. 2, the pipe support structure according to the second embodiment is not only between the pipe 1 and the pipe support member 2 and between the pipe 1 and the fixture 3, but also between the pipe support member 2 and the nut 5. A frictional force body 6 is also provided between the fixing bracket 3 and the bolt 4. Since other parts are the same as the pipe support structure according to the second embodiment, the corresponding parts are denoted by the same reference numerals and description thereof is omitted.

  In the pipe support structure according to the second embodiment, the frictional force body 6 is sandwiched between the pipe support member 2 and the nut 5 and between the fixing bracket 3 and the bolt 4. The frictional force acting not only between the pipe 1 and the pipe 1 and the fixture 3 but also between the fixture 3 and the bolt 4 and between the pipe support member 2 and the nut 5 can be increased. The pipe 1 can be completely fixed more reliably than the pipe support structure according to the embodiment.

  In the present embodiment, the frictional force body 6 is sandwiched between both the pipe support member 2 and the nut 5 and between the fixing bracket 3 and the bolt 4, but the frictional force body 6 is sandwiched only in one of them. You can also Also in this case, the fixing effect of the pipe 1 can be enhanced more than the pipe support structure according to the first embodiment.

  Further, when a washer is provided between the pipe support member 2 and the nut 5 and between the fixture 3 and the bolt 4, between the washer and the pipe support member 2 and between the washer and the fixture 3. The frictional force body 6 is sandwiched. In this case, it is desirable to fix the frictional force body 6 to the washer in order to increase the installation efficiency of the pipe 1.

  Needless to say, when the nut 5 is disposed on the upper surface side of the fixing bracket 3, the frictional force body 6 is sandwiched between the pipe support member 2 and the bolt 4 and between the fixing bracket 3 and the nut 5.

<Third Embodiment>
As shown in FIG. 3, the pipe support structure according to the third embodiment uses a structure in which bolts 4 are fixed to both ends of the fixture 3 by welding or the like, and between the pipe 1 and the pipe support member 2. A frictional force body 6 is sandwiched between 1 and the fixing bracket 3 and between the pipe support member 2 and the nut 5. Since other parts are the same as the pipe support structure according to the second embodiment, the corresponding parts are denoted by the same reference numerals and description thereof is omitted.

  In the pipe support structure according to the third embodiment, since the bolts 4 are fixed to both ends of the fixing bracket 3 by welding or the like, the slip between the fixing bracket 3 and the bolt 4 can be completely prevented, and the pipe 1 The fixing effect can be enhanced, the number of parts can be reduced, and piping installation work can be facilitated.

  Also in this embodiment, when a washer is provided between the pipe support member 2 and the nut 5, the frictional force body 6 is provided between the washer and the pipe support member 2. Also in this case, it is desirable to fix the frictional force body 6 to the washer in order to increase the installation efficiency of the pipe 1.

  INDUSTRIAL APPLICABILITY The present invention can be applied as a pipe restraint support means in a place where it is necessary to restrain displacement in a direction in which the pipe can be displaced due to an influence such as earthquake, thermal expansion, dead weight, mechanical load or fluid vibration in a power generation facility.

It is explanatory drawing of the piping support structure which concerns on 1st Embodiment. It is explanatory drawing of the piping support structure which concerns on 2nd Embodiment. It is explanatory drawing of the piping support structure which concerns on 3rd Embodiment. It is a figure which shows the 1st example of the piping support structure known conventionally. It is a figure which shows the 2nd example of the piping support structure known conventionally. It is a figure which shows the 3rd example of the piping support structure known conventionally. It is a figure which shows the 4th example of the piping support structure known conventionally.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Piping 2 Piping support member 3 Fixing bracket 4 Bolt 5 Nut 6 Friction force body

Claims (6)

  In a pipe support structure comprising a pipe, a pipe support member that supports the pipe, and a pipe fixing member that fixes the pipe to the pipe support member, between the pipe and the pipe support member, and between the pipe and the pipe fixing member, A piping support structure characterized by sandwiching a frictional force body that increases a frictional force acting between the members as compared with the case where the members are in direct contact with each other.   The pipe fixing member is composed of a fixing bracket wound around the pipe, and a bolt and a nut for fastening the fixing bracket and the pipe supporting member, and between the fixing bracket and the bolt or the nut or the pipe support. The piping support structure according to claim 1, wherein the frictional force body is further sandwiched between a member and the bolt or the nut.   The pipe fixing member includes a fixing bracket wound around the pipe, a bolt having one end fixed to both ends of the fixing bracket, and a nut for fastening the bolt and the pipe supporting member. The piping support structure according to claim 1, wherein the frictional force body is further sandwiched between the nut and the nut.   The piping support structure according to any one of claims 1 to 3, wherein the frictional force body is made of a sheet-like rubber-like elastic body.   The piping support structure according to claim 4, wherein the rubber-like elastic body is silicon rubber.   The pipe support structure according to any one of claims 2 and 3, wherein both ends of the fixing bracket and the pipe support member are fastened to each side by a plurality of bolts and nuts.

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