JP5758151B2 - Piping support structure - Google Patents

Description

  The present invention relates to a support structure for connecting a pipe through which a high-temperature fluid flows to a structure.

For example, piping such as a petrochemical plant is attached to a structure via a support (see, for example, Patent Document 1).
Since piping of such a petrochemical plant circulates a high-temperature fluid during operation, it is thermally expanded only during operation due to the influence of the heat of this fluid. Therefore, when the pipe is rigidly connected to the structure, there is a possibility of causing damage or the like due to the influence of the thermal elongation of the pipe. For this reason, the pipe is supported softly with respect to the structure by, for example, placing a support that supports the pipe so as to be relatively movable with respect to the structure.

No. 7-4383

  However, when the piping system is softly supported with respect to the structure as described above, the natural frequency of the piping system is reduced, so that it is easily affected by the excitation force due to the disturbance of the fluid flowing in the piping. . As a result, the piping easily vibrates, so that there is a problem that a failure is easily caused and a maintenance cost is increased.

  The present invention has been made in view of such a problem, and a pipe capable of suppressing vibration of a pipe caused by the influence of a disturbance of a fluid flowing in the pipe while allowing thermal expansion of the pipe. The purpose is to provide a support structure.

In order to solve the above problems, the present invention provides the following means.
That is, it is a pipe support structure for supporting a pipe through which a high-temperature fluid flows according to the present invention with respect to a structure, and is fixed to the pipe so as to approach each other toward one side in the extending direction of the pipe. A support body having a pair of pressure-receiving surfaces inclined to each other, a pair of stoppers capable of contacting the pair of pressure-receiving surfaces so as to sandwich the support body from both sides, and the stoppers toward the pressure-receiving surface And a biasing member for biasing.

  According to the pipe support structure having such a feature, since the stopper urged by the urging member sandwiches the support body, the stopper resists the urging of the urging member when the pipe is thermally expanded. The movement of the pipe allows thermal expansion of the pipe. In addition, after the pipe is thermally expanded, the support body is held rigidly against the supported part by the urging force of the urging member through the stopper, so that the natural frequency of the piping system is reduced. It can be avoided.

  Thereby, the movement of the pipe in both the extending direction of the pipe and the direction orthogonal to the extending direction can be restricted by the biasing force of the biasing member via the stopper. Therefore, the support body provided integrally with the pipe can be more rigidly connected to the structure.

Moreover, it is preferable that the pipe support structure according to the present invention further includes holding means capable of holding the stopper in a state of being separated from the support main body against the biasing of the biasing member.

  As a result, when the high temperature fluid is not flowing through the pipe, the stopper is placed away from the support body by the holding means, thereby allowing more reliable thermal expansion of the pipe after the high temperature fluid flows through the pipe. can do. In addition, after the piping is thermally expanded, the support body can be reliably supported through the stopper by releasing the holding of the stopper by the holding means.

Furthermore, in the piping support structure according to the present invention, it is preferable that the urging member urges the stopper toward the other side in the extending direction of the piping.
This makes it possible to more reliably suppress vibration of the pipe, particularly in the direction in which the pipe extends.

In the pipe support structure according to the present invention, the biasing member may bias the stopper toward a direction orthogonal to the extending direction of the pipe.
This makes it possible to more reliably suppress the vibration of the pipe, particularly in the direction perpendicular to the extending direction of the pipe.

  According to the pipe support structure of the present invention, the support body is held so as to be sandwiched between the pair of stoppers urged by the urging member, so that thermal expansion of the pipe is allowed and the natural frequency of the piping system Can be avoided, and vibration of the pipe based on the fluid flowing through the pipe can be prevented.

It is a perspective view of piping concerning a first embodiment, and a support body provided integrally with the piping. It is a top view which shows the outline | summary of the piping support structure which concerns on 1st embodiment. It is a top view which shows the outline | summary of the piping support structure which concerns on 2nd embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 and 2, the support structure 10 of the pipe 1 of the first embodiment is a pipe 1 that is installed in a petrochemical plant or the like and in which a high-temperature fluid circulates, for example, in the structure 2 of the plant. The support structure includes a support main body 20, a frame body 30, a stopper 40, a coil spring (biasing member) 50, and a holding bolt (holding means) 60.

  The support body 20 has a role of supporting the pipe 1 extending parallel to the surface of the structure 2 on the surface of the structure 2, and is disposed between the pipe 1 and the surface of the structure 2. It is composed of a base portion 21 and a standing portion 23.

  The base portion 21 is a flat plate-like member, and is placed on the surface so as to extend along the surface of the structure 2. The base portion 21 is not constrained by the structure 2 and is relatively movable in a direction along the surface of the structure 2. In order to facilitate relative movement between the base portion 21 and the structure 2, a lubricant may be interposed between the base portion 21 and the structure 2.

  An outer peripheral surface of the base portion 21 facing the surface of the structure 2, that is, a surface perpendicular to the structure 2 on the outer peripheral side of the base portion 21 extends in the extending direction of the pipe 1. A pair of side surfaces 21a facing opposite sides, a front end surface 21b facing one side in the extending direction of the pipe 1, and a rear end face 21c connected to each of the pair of side faces 21a and facing the other side in the extending direction of the pipe 1 And.

  And the part which connects a pair of side surface 21a and front-end | tip surface 21b among the outer peripheral surfaces of the base part 21 is made into the pressure receiving surface 22 which inclines so that it may mutually adjoin, as it goes to the extending direction one side of the piping 1. Yes.

The standing portion 23 is provided on the base portion 21 so as to rise vertically from the base portion 21 toward the opposite side of the structure 2 from the base portion 21, and the tip thereof is integrally fixed to the pipe 1. ing.
The pipe 1 is supported by the support body 20 including the base portion 21 and the standing portion 23 in a state of being spaced apart from the structure 2.

  The frame 30 is a member that is integrally fixed to the surface of the structure 2 so as to extend along the surface of the structure 2, and before the frame 30 extends in a direction perpendicular to the extending direction of the pipe 1. The frame 31, a pair of side frame portions 31 extending from both ends of the front frame portion 31 toward the other side in the extending direction of the pipe 1, and the other side in the extending direction of the pipe 1 in these side frame portions 31 And a pair of rear frame portions 33 extending from the end portions in directions close to each other.

  The space between the pair of rear frame portions 33 facing in the direction orthogonal to the extending direction of the pipe 1 serves as an inlet portion into the frame body 30 that opens toward the other side in the extending direction of the pipe 1. The base portion 21 of the support body 20 is disposed so as to be located at the entrance portion on the surface of the frame body 30.

A pair of stoppers 40 is attached to the frame body 30 and includes a guide portion 41 and a stopper main body 42.
The guide portion 41 is provided on the inner surfaces of the pair of side frame portions 31 of the frame body 30, that is, the surfaces facing each other in the pair of side frame portions 31. Each of the pair of guide portions 41 has a rail shape extending in the extending direction of the side frame portion 31.

The stopper main body 42 is attached to each of the pair of guide portions 41 so as to be slidable in the extending direction of the pipe 1. The stopper main body 42 can be brought into contact with and separated from the support by sliding movement through the guide portion 41.
Moreover, a part of the mutually opposing surface in these pair of stopper main bodies 42 is made into the support surface 43 which mutually adjoins as it goes to the extending direction one side. When the stopper main body 42 comes into contact with the support main body 20, the support surface 43 of each stopper 40 comes into surface contact with the pressure receiving surface 22 of the guide portion 41.

  A pair of coil springs 50 is provided, and one end is fixed to the front frame portion 31 and the other end is fixed to the stopper main body 42 inside the frame body 30. Thus, the coil spring 50 urges the stopper body 42 toward the other side in the extending direction of the pipe 1.

  The holding bolts 60 are a pair of bolts that are provided so as to pass through each of the pair of rear frame portions 33 of the frame body 30 from the other side in the extending direction of the pipe 1 toward the one side. It is comprised so that it may advance / retreat to the extension direction of the piping 1. Thereby, the front end of the holding bolt 60 can be brought into contact with and separated from the stopper main body 42 from the other side in the extending direction of the pipe 1.

Next, the operation of the support structure 10 when operating a plant including the support structure 10 of the pipe 1 will be described.
First, before the operation of the plant, the holding bolt 60 is rotated to advance the tip of the holding bolt 60 to one side in the extending direction of the pipe 1 to press the stopper main body 42. Accordingly, the stopper 40 is moved along the guide portion 41 to one side in the extending direction of the pipe 1, the stopper main body 42 is separated from the base portion 21 of the support main body 20, and between the base portion 21 and the stopper main body 42. A gap is formed in The dimension of this gap is set according to the amount of thermal expansion of the pipe 1 assumed during operation of the plant.

  Subsequently, when the operation of the plant is started, a high-temperature fluid flows through the inside of the pipe 1. Thereby, especially the piping 1 begins to heat-extend in the extension direction, and in connection with this, the support main body 20 fixed to the piping 1 moves relatively with respect to the structure 2 toward the extension direction one side, for example. To do.

  When the operation of the plant reaches the rated operation, the holding bolt 60 is rotated to retreat the holding bolt 60 to the other side in the extending direction of the pipe 1, and the tip of the holding bolt 60 is moved from the stopper body 42. Separate. Accordingly, the stopper main body 42 moves to the other side in the extending direction of the pipe 1 according to the urging force of the coil spring 50, and the support surface 43 of the stopper main body 42 comes into surface contact with the pressure receiving surface 22 of the base portion 21.

  In this manner, the base portion 21 of the support body 20 is sandwiched from both sides by the pair of stopper bodies 42, that is, the support body 20 is supported by the biasing force of the coil spring 50 transmitted through the stopper 40. It becomes a state.

Thus, when the pipe 1 vibrates in the extending direction during rated operation of the plant, the movement of the pipe 1 is suppressed by the biasing force of the pair of coil springs 50.
Further, even when the pipe 1 is vibrated in a direction orthogonal to the extending direction, the vibration of the pipe 1 is suppressed by the stopper body 42 that holds the pipe 1 so as to be sandwiched from both sides. In particular, in this embodiment, since the stopper main body 42 is attached to the guide portion 41, vibration in a direction orthogonal to the extending direction of the pipe 1 is mechanically restrained by the guide portion 41.

As described above, according to the support structure 10 of the pipe 1 of the present embodiment, when the high-temperature fluid is not circulating in the pipe 1, the stopper 40 is disposed away from the support body 20 by the holding bolt 60. The thermal elongation of the pipe 1 after the high-temperature fluid flows through the pipe 1 can be allowed.
In addition, after the pipe 1 is thermally expanded, the support body 20 can be reliably supported by the biasing force of the coil spring 50 via the stopper 40 by releasing the holding of the stopper 40 by the holding bolt 60. As a result, a decrease in the natural frequency of the pipe 1 can be avoided, so that the pipe 1 is not vibrated by the fluid flowing through the pipe 1 and the vibration of the pipe 1 can be suppressed. Become.

  In particular, in this embodiment, since the pressure receiving surface 22 of the base portion 21 of the support body 20 is inclined with respect to the extending direction of the pipe 1, the extending direction of the pipe 1 and the extending direction are orthogonal to the extending direction. The movement of the pipe 1 in both directions can be restricted by the biasing force of the coil spring 50. Therefore, the support body 20 provided integrally with the pipe 1 can be rigidly connected to the structure 2.

  Furthermore, in this embodiment, since the coil spring 50 biases the stopper main body 42 in the extending direction of the pipe 1, vibrations in the extending direction of the pipe 1 can be suppressed more reliably.

  Next, the support structure 10 of the piping 1 of 2nd embodiment is demonstrated. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 3, the support structure 10 of the second embodiment is different from the first embodiment in the arrangement of the stopper 40, the coil spring 50, and the holding bolt 60.

  That is, a pair of guide portions 41 in the stopper 40 of the second embodiment is provided along the extending direction of the front frame portion 31 with respect to the front frame portion 31 of the frame body 30. The stopper main body 42 can be slid along the direction orthogonal to the extending direction of the pipe 1 along the direction.

  The coil spring 50 according to the second embodiment has one end fixed to each of the pair of side frame portions 31 and the other end fixed to the stopper main body 42 in the frame body 30. Accordingly, the coil spring 50 biases the stopper main body 42 so as to be close to each other in a direction orthogonal to the extending direction of the pipe 1.

  Further, the holding bolt 60 of the second embodiment is inserted so that each of the pair of side frame portions 31 of the frame body 30 is inserted from the outside of the frame body 30 toward the inside in a direction orthogonal to the extending direction of the pipe 1. A pair is provided. Such a holding bolt 60 is advanced and retracted by rotating, and its tip is fixed integrally with the stopper 40.

  Also in the support structure 10 of the pipe 1 of the second embodiment as described above, the stopper 40 is separated from the support body 20 by retracting the holding bolt 60 when a high-temperature fluid is not flowing through the pipe 1. Hold on. Thereby, the thermal elongation of the said piping 1 after a high temperature fluid distribute | circulates to the piping 1 can be accept | permitted.

  In addition, after the pipe 1 has been thermally expanded, the holding of the stopper 40 by the holding bolt 60 is released, that is, the holding bolt 60 is rotated and moved forward according to the urging force of the coil spring 50, so that the stopper body 42 is interposed. The support body 20 can be sandwiched and supported by the urging force of all the coil springs 50. As a result, as in the first embodiment, a reduction in the natural frequency of the pipe 1 can be avoided, and therefore vibration of the pipe 1 based on the fluid flowing through the pipe 1 can be suppressed.

  Furthermore, in this embodiment, since the coil spring 50 urges the stopper main body 42 in a direction orthogonal to the extending direction of the pipe 1, vibration in the direction orthogonal to the extending direction of the pipe 1 is more reliably ensured. Can be suppressed.

As mentioned above, although embodiment of this invention was described in detail, unless it deviates from the technical idea of this invention, it is not limited to these, A some design change etc. are possible.
For example, in the embodiment, the support structure 10 of the pipe 1 provided with the holding bolt 60 has been described, but the holding bolt 60 is not necessarily provided.

  In this case, the stopper main body 42 urged by the urging force of the coil spring 50 abuts so as to sandwich the support main body 20 regardless of whether the plant is in operation or not. Therefore, when the pipe 1 is thermally expanded, the thermal expansion of the pipe 1 is permitted by moving the stopper 40 while compressing the coil spring 50. In addition, after the pipe 1 is thermally expanded, the support body 20 can be rigidly held by the coil spring 50 that has been compressed and increased in urging force. Therefore, as in the embodiment, it is possible to suppress vibration of the pipe 1 while allowing thermal expansion of the pipe 1.

  Further, for example, the pressure receiving surface 22 of the base portion 21 of the support main body 20 and the support surface 43 of the stopper main body 42 may be roughened so that the frictional force is increased. Accordingly, the base portion 21 material can be more firmly supported by the stopper main body 42.

  Furthermore, in the embodiment, the base portion 21 of the support body 20 is configured to support movement in the direction along the surface of the structure 2. For example, the movement in the direction perpendicular to the surface of the structure 2 is restricted. Another stopper 40 or the like may be provided.

  In the embodiment, the example in which the holding bolt 51 is used as the holding means has been described. However, instead of this, the position of the stopper main body 42 may be held using a ball screw mechanism.

DESCRIPTION OF SYMBOLS 1 Piping 2 Supported part 10 Support structure 20 Support main body 21 Base part 22 Pressure receiving surface 23 Standing part 30 Frame 31 Front frame part 32 Side frame part 33 Rear frame part 34 Inlet part 40 Stopper 41 Guide part 42 Stopper main body 43 Support Surface 50 Coil spring 51 Holding bolt

Claims (4)

A pipe support structure for supporting a pipe through which a high-temperature fluid flows with respect to the structure,
A support body having a pair of pressure receiving surfaces fixed to the pipe and inclined so as to be close to each other as it goes to one side in the extending direction of the pipe ;
A pair of stoppers capable of contacting the pair of pressure receiving surfaces so as to sandwich the support body from both sides;
A piping support structure, comprising: an urging member that urges the stopper toward the pressure receiving surface . The piping support structure according to claim 1, further comprising holding means capable of holding the stopper in a state of being separated from the support main body against the biasing of the biasing member. The biasing member is
The support structure for a pipe according to claim 1 or 2 , wherein the stopper is biased toward the other side in the extending direction of the pipe. The biasing member is
The pipe support structure according to claim 1 or 2 , wherein the stopper is biased in a direction orthogonal to an extending direction of the pipe.

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