JP2022091327A - Pipe support structure - Google Patents

Abstract

To provide a pipe support structure capable of being installed in a pipe even in a case where liquid flows in the pipe.SOLUTION: At an upper part of a structure that supports a pipe, provided is a restraining member that is arranged so as to straddle the pipe and is fixed to the structure in a state of being in contact with the outer peripheral surface of the pipe. Also, on the structure, provided is a saddle part that is arranged between the structure and the pipe and has a friction surface on the surface on the pipe side.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pipe support structure that supports pipes passing through a power plant or the like.

Many pipes pass through the power plant, and a pipe support structure that supports the pipes is installed to prevent deformation and vibration of these pipes.

As the pipe support structure for restraining the axial direction of the pipe, a lug welded to the pipe is generally used as in the invention described in Patent Document 1. Patent Document 1 discloses a configuration in which a plurality of pipe lugs are joined to the outer peripheral surface of a pipe by welding.

Further, FIG. 4A shows a schematic configuration diagram of a pipe support structure using a conventional lug as viewed from the axial direction of the pipe, and FIG. 4B shows a schematic diagram of the pipe support structure using a conventional lug as viewed from above. The block diagram is shown. As shown in FIG. 4A, conventionally, after the pipe 101 is arranged in a structure 102 such as a frame, a U-shaped member 100 (hereinafter, U plate) is arranged so as to straddle the pipe 101, and the U plate 100 is arranged. Is fixed to the structure 102. Then, as shown in FIG. 4B, the pipe 101 is fixed to the structure 102 by fixing the lug 103 to the pipe 101 and the structure 102 by welding.

Japanese Unexamined Patent Publication No. 2017-48863

By the way, due to the stricter seismic conditions in recent years, it is required to improve the strength of the pipe support structure in the power plant.

In order to improve the strength, it is necessary to add or change the structure of the pipe support structure to support the pipe. It is also expected that the number of pipe support structures will increase for newly constructed power plants compared to the conventional design.

On the other hand, if fluid is flowing in the pipe, the lug and the pipe may not be weldable. Therefore, when adding a pipe support structure while fluid is already flowing in the pipe, it is necessary to drain the fluid in the pipe before welding the lug to the pipe. In this case, it is necessary to wait for the construction of the rug until the piping fluid is completely drained, and there is a problem that the additional work takes time. Therefore, there is a demand for a pipe support structure that does not require welding.

Therefore, an object of the present invention is to provide a pipe support structure that can be applied to a pipe even when a fluid is flowing in the pipe.

In order to solve the above problems and achieve the object of the present invention, the pipe support structure of the present invention is arranged so as to straddle the pipe at the upper part of the structure supporting the pipe, and is in contact with the outer peripheral surface of the pipe. It is provided with a restraining member fixed to the structure. Further, on the structure, a saddle portion which is arranged between the structure and the pipe and has a friction surface on the surface on the pipe side is provided.

According to the present invention, construction is possible regardless of whether or not a fluid is flowing in the pipe.

FIG. 1A is a schematic configuration diagram of the pipe support structure 1 of the first embodiment as viewed from the axial direction of the pipe, and FIG. 1B is a schematic configuration diagram of the pipe support structure 1 of the first embodiment as viewed from above. It is a block diagram. It is a schematic perspective view of the saddle part 3. FIG. 3A is a schematic configuration diagram of the pipe support structure 20 of the second embodiment as viewed from the axial direction of the pipe 10, and FIG. 3B is a diagram of the pipe support structure 20 of the second embodiment as viewed from above. It is a schematic block diagram. FIG. 4A is a schematic configuration diagram of a pipe support structure using a conventional lug as viewed from the axial direction of the pipe, and FIG. 4B is a schematic configuration diagram of a pipe support structure using a conventional lug as viewed from above. Is.

Hereinafter, an example of the pipe support structure according to the embodiment of the present invention will be described with reference to the drawings. The present invention is not limited to the following examples. In each of the figures described below, the common members are designated by the same reference numerals.

1. 1. First Embodiment First, the configuration of the pipe support structure according to the first embodiment of the present invention (hereinafter referred to as “the present embodiment”) will be described with reference to the drawings. FIG. 1A is a schematic configuration diagram of the pipe support structure 1 of the present embodiment as viewed from the axial direction of the pipe, and FIG. 1B is a schematic configuration diagram of the pipe support structure 1 of the present embodiment as viewed from above. ..

As shown in FIG. 1A, the pipe support structure 1 of the present embodiment is a structure that supports the pipe 10 on the upper surface of a structure 9 such as a frame, and has a restraint member 2 and a saddle portion 3. In the following description, the axial direction of the pipe 10 will be described as the Z direction, the height direction of the pipe 10 on the structure 9 supporting the pipe 10 will be described as the Y direction, and the direction orthogonal to the Z direction and the Y direction will be described as the X direction.

The restraint member 2 is composed of a U-shaped member, and is arranged so as to straddle the pipe 10 on a structure 9 that supports the pipe 10. In the present embodiment, female screws 6 to which bolts 7 described later are screwed are provided at both ends of the restraint member 2. Then, the restraining member 2 is fixed to the structure 9 in a state of being in contact with the outer peripheral surface of the pipe 10.

Both ends of the restraint member 2 provided with the female screw 6 are placed on the upper surface of the structure 9. Then, the bolt 7 inserted from the side opposite to the side where the restraint member 2 of the structure 9 is arranged toward the side where the restraint member 2 is arranged is screwed into the female screw 6 of the restraint member 2. By fastening, the restraining member 2 can be fixed to the structure 9.

The saddle portion 3 is arranged between the structure 9 and the pipe 10 on the structure 9. The saddle portion 3 has a friction surface bonded to the slope surface 5a of the saddle body 5 and the saddle body 5 made of a member having a V-shaped cross section having a slope surface 5a (see FIG. 2) on the surface side supporting the pipe 10. It is composed of a sheet 4.

FIG. 2 is a schematic perspective view of the saddle portion 3. As shown in FIG. 2, the gradient surface 5a is a surface formed so that the height of the saddle body 5 in the Y direction is continuously increased from the center of the saddle body 5 in the X direction toward both ends in the X direction. It is composed of. The gradient surface 5a is provided symmetrically with respect to the axial direction of the pipe 10, that is, the Z direction.

The surface (bottom surface) of the saddle portion 3 opposite to the inclined surface 5a has a horizontal plane. The horizontal plane of the saddle portion 3 is adhered on the structure 9. For bonding the saddle body 5 onto the structure 9, for example, welding can be used. The width of the saddle portion 3 in the Z direction is set to be approximately the same as the width of the restraint member 2 in the Z direction. Further, the width of the saddle body 5 in the X direction is set to be smaller than the outer diameter of the pipe 10.

The angle of the slope surface 5a with respect to the horizontal plane of the saddle body 5 can be changed in various ways, but any shape may be used as long as the pipe 10 arranged at the top can be supported by the slope surfaces 5a on both sides. In the present embodiment, by supporting the pipe 10 with the slope surfaces 5a on both sides of the saddle main body 5, the contact points between the pipe 10 and the friction sheet 4 can be set to two points. This facilitates the calculation of the friction between the pipe 10 and the friction sheet 4, and can further increase the binding force of the saddle portion 3 in the Z direction.

The friction sheet 4 provided on the slope surface 5a of the saddle body 5 is made of, for example, a Teflon (registered trademark) processed sheet member, and is attached along the slope surface 5a on the entire surface of the slope surface 5a of the saddle body 5. There is. Further, the friction sheet 4 is made of a material having a friction coefficient larger than the friction coefficient of the surface of the pipe 10. This makes it possible to limit the axial movement of the pipe 10 arranged in the saddle portion 3.

When the pipe 10 is restrained with respect to the structure 9 by using the pipe support structure 1 of the present embodiment, first, a saddle portion 3 is provided between the structure 9 and the pipe 10 on the structure 9. Deploy. After that, the horizontal plane of the saddle portion 3 is adhesively fixed on the structure 9 by welding or the like. Next, the U-shaped restraint member 2 is arranged so as to straddle the pipe 10 (cover the pipe 10). Then, the restraining member 2 is fixed to the structure 9 with bolts 7. At this time, the restraint member 2 is tightened with bolts 7 so that the friction surface of the pipe 10 and the friction sheet 4 of the saddle portion 3 are in close contact with each other.

In the pipe support structure 1 of the present embodiment, the pipe 10 is arranged on the saddle portion 3 having a friction surface on the surface, and the pipe 10 is fixed by the restraining member 2 so as to be in close contact with the friction surface of the friction sheet 4. Therefore, the movement of the pipe 10 in the axial direction can be restrained.

In the conventional pipe support structure in which a lug is welded to a pipe, the pipe support structure can be constructed only when there is no fluid in the pipe. On the other hand, in the present embodiment, since welding to the pipe 10 is not required, the construction can be performed even when the fluid is flowing through the pipe 10. Further, since the pipe support structure 1 of the present embodiment has a structure that does not require welding to the pipe 10, it is possible to reduce the construction cost. Further, since the pipe support structure 1 of the present embodiment can restrain the axial direction of the pipe 10 only by tightening the restraining member 2 to the structure 9 with a bolt, the construction is poor as compared with the configuration requiring welding. Can be reduced.

In the present embodiment, the female screw 6 to which the bolt 7 is screwed is provided on the restraint member 2 side, the bolt 7 is inserted from the structure 9 side, and the bolt 7 is tightened to the female screw 6 of the restraint member 2. , Not limited to this. For example, a male screw is provided at the end of the restraint member 2 on the structure 9 side, and the male screw is inserted into a bolt hole provided in the structure 9 and tightened with a nut to tighten the restraint member 2 to the structure. It may be fixed to 9. As described above, the method of tightening the restraint member 2 to the structure 9 with bolts can be variously changed.

2. 2. Second Embodiment Next, the configuration of the pipe support structure according to the second embodiment of the present invention will be described with reference to FIGS. 3A and 3B. FIG. 3A is a schematic configuration diagram of the pipe support structure 20 of the second embodiment as viewed from the axial direction of the pipe 10, and FIG. 3B is a diagram of the pipe support structure 20 of the second embodiment as viewed from above. It is a schematic block diagram. In FIGS. 3A and 3B, the parts corresponding to FIGS. 1A and 1B are designated by the same reference numerals and duplicate description will be omitted. In the pipe support structure 20 of the present embodiment, the shape of the restraint member 11 is different from that of the first embodiment.

The restraint member 11 in the pipe support structure 20 of the second embodiment has two beam-shaped members 11a extending in the Y direction (vertical direction of the structure 9) and an X direction (horizontal direction of the structure 9). It is composed of one beam-shaped member 11b extending to. The two beam-shaped members 11a and 11a face each other in the X direction with a predetermined interval, for example, a length corresponding to the diameter of the pipe 10. The restraint member 11 has three beam-shaped members 11a and 11b assembled in a U-shape. The beam-shaped members 11a and 11b are previously bonded and fixed to each other by welding or the like.

Also in the restraint member 11 of the second embodiment, a female screw 13 into which a bolt 7 is screwed is provided at an end portion of the two beam-shaped members 11a extending in the Y direction located on the structure 9 side. ing.

When the pipe 10 is restrained to the structure 9 by using the pipe support structure 20 of the second embodiment, first, a saddle is placed between the structure 9 and the pipe 10 on the structure 9 such as a frame. The part 3 is arranged. After that, the horizontal plane (bottom surface) of the saddle portion 3 is adhesively fixed on the structure 9 by welding or the like. Next, the restraint member 11 composed of the beam-shaped members 11a and 11b is arranged so as to straddle the pipe 10. Then, the restraining member 11 is tightened to the structure 9 with the bolt 14. Also in this embodiment, the restraining member 11 is tightened with the bolt 14 so that the friction surface of the pipe 10 and the friction sheet 4 of the saddle portion 3 are in close contact with each other.

In the second embodiment as well, as in the first embodiment, since the welding work for the pipe 10 is not required, the work can be performed regardless of whether or not the fluid is flowing in the pipe 10. Further, in the pipe support structure 20 of the present embodiment, since the restraint member 11 can be configured only by adhering the beam-shaped members 11a and 11b, the restraint member 2 (FIG. 1A) composed of the U-shaped member can be used. In comparison, the cost can be reduced.

The embodiments of the present invention have been described above, but the present invention is not limited thereto. In the present embodiment, the saddle portion 3 is an example composed of the saddle main body 5 and the friction sheet 4, but a fine groove portion is provided on the surface of the saddle portion 3 on the side in contact with the pipe 10, and this is used as the friction surface. You can also. Various changes can be made as long as the surface of the saddle portion 3 on the side in contact with the pipe 10 can have a friction coefficient larger than the friction coefficient of the outer peripheral surface of the pipe 10.

Further, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. For example, it is possible to replace a part of the configuration of the embodiment with another configuration, and it is also possible to add another configuration to the configuration of the embodiment. Further, it is possible to add / delete / replace a part of the configuration of the embodiment with another configuration.

1 ... Pipe support structure, 2 ... Restraint member, 3 ... Saddle part, 4 ... Friction sheet, 5 ... Saddle body, 5a ... Slope surface, 6 ... Female screw, 7 ... Bolt, 9 ... Structure, 10 ... Piping, 11 ... Restraint member, 13 ... Female screw, 14 ... Bolt, 20 ... Piping support structure

Claims (5)

A restraining member arranged so as to straddle the pipe and fixed to the structure in contact with the outer peripheral surface of the pipe in the upper part of the structure supporting the pipe.
On the structure, a saddle portion arranged between the structure and the pipe and having a friction surface on the surface on the pipe side, and a saddle portion.
Piping support structure. The surface side of the saddle portion that supports the pipe is adhered to a saddle main body made of a member having a V-shaped cross section having a predetermined gradient and a surface of the saddle main body that supports the pipe, and the surface of the pipe is adhered to. The pipe support structure according to claim 1, which is composed of a friction sheet having a friction coefficient larger than that of the above. The piping support structure according to claim 2, wherein the restraining member is composed of a U-shaped member. The second aspect of claim 2, wherein the restraining member is composed of one beam-shaped member extending in the horizontal direction of the structure and two beam-shaped members extending in the vertical direction of the structure. Piping support structure. The pipe support structure according to claim 1, wherein the restraining member is fixed to the structure with bolts.

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