JPS6192382A - Piping supporter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention is applied to a piping system related to a piping support device for nuclear power generation equipment.

[Background of the invention]

In the conventional device, as described in Japanese Patent Publication No. 59-5193, the lug was integrated with the prison tube and fixed by welding. However, this may cause local stress to occur in the piping and lug welds, and even if the reaction force is received around the entire circumference and the local stress is reduced, it is difficult to use the piping and lug in areas where the piping reaction force is large. There was a problem because large stress was generated in the welded part.

In conventional vehicle holding systems, the restraint reaction force caused by thermal expansion displacement of the piping, rapid displacement during an earthquake, etc. acts concentratedly on the welded part of the piping and the lug as compression and shearing force, causing the piping to deform and break. It had drawbacks that were easy to occur. Furthermore, when the piping and the lug are directly welded, there is a risk that if a crack occurs in the lug due to vibration of the piping, the crack will advance and spread to the piping.

Furthermore, it required a lot of man-hours to manufacture and install, and it was very difficult to install the core and the grooves both in the factory and on-site.

Figures 7 and 8 show the piping restraint lug described in the aforementioned Japanese Patent Publication No. 59-5193, which does allow rotation around the central axis of the piping, but the friction of the contact surface prevents smooth rotation. Also, the piping and lugs were directly welded. and,
FIG. 9 shows a conventional piping restraint lug. This is achieved by providing angles 7 at the front and rear of each of four welded lugs 6 on the upper, lower, left, and right sides of a frame-like structure 4 to restrain the piping in the axial direction. The structure also allows rotation around the piping axis. However, even in such a structure, the piping and the lug are directly welded, and the angle for axial restraint must be welded to the frame structure, which requires a lot of man-hours for manufacturing and construction. The quality of welding was also an issue.

[Object of the Invention] The object of the present invention is to restrain the translational movement of the three-sided inner metal of the piping, including the axial direction, against thermal expansion displacement, strata displacement, etc., while restraining the rotational movement around the central axis of the piping. An object of the present invention is to provide a piping support device that allows the piping to be moved freely.

[Summary of the invention]

In the present invention, rectangular structures are attached to the upper, lower, left, and right sides of a frame-like structure to restrain movement of the piping in two directions perpendicular to the axis.

Furthermore, if a triangular notch is provided on the piping side of this square structure and the piping is supported by bringing the contact surfaces of the piping restraint band lugs into contact with both sides of the notch, the translation of the piping in the axial direction can be restrained at the same time. Also, the contact surface of the pipe restraining band lug with the triangular notch of the rectangular structure is rounded to facilitate rotational movement around the axis of the pipe.

Therefore.

As a result, translational movement of the piping in three directions due to thermal expansion, earthquake displacement, etc. can be restrained, and rotational movement around the axis of the piping can be facilitated.

[One embodiment of the invention]

An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 4. In Fig. 1, 1 is a pipe, 2 is a band lug, 3 is a rectangular structure with a triangular notch, 4 is a frame-like structure, and 5 is an embedded metal fitting. FIG. 2 is a sectional view taken along the line xx in FIG. 1, showing the state in which the pipe 1 is supported by the band lug 2, and FIG.

In the 0 part 2' which is a detailed view of the band lug 2 of the present invention,
It is configured to be wrapped around almost the entire circumference of the pipe 1 and tightly fixed, and to be brought into contact with a triangular cutout portion of a square structure at a portion 2# as shown in FIG. FIG. 4 shows a square structure with a triangular cutout, which is designed so that the cutout surface 3' contacts the band lug part 21, and is attached to the frame structure 4 by welding. It is being Additionally, the grooves in this triangular notch are cut diagonally to make adjustments easier.

By doing so, it becomes easier to adjust when obtaining a gap for releasing the circumferential thermal expansion of the pipe.

The present invention has the above-mentioned configuration, and includes a pipe 1, a frame-like structure 4 for indirect support of the pipe 1 located at the installation position of the pipe 1, and a frame-like structure 4 on the top, bottom, left and right of the frame-like structure. In the square structure 3 having a partially attached triangular notch and directly supporting the pipe 1, and the band lug 2 for restraining the pipe 1 provided between the square structure 3 and the pipe 1, This band lug 2 is divided into two parts in contact with the outer diameter of the plumber, and the contact area of the pipe 1 is made large at the part 2', and the convex part 2' whose tip is rounded is used to connect the square structure 3. Triangular cutout surface 3'
The structure is such that it is supported in line contact with the In this configuration, the piping 1 undergoes thermal expansion displacement.

In response to the load caused by sudden displacement during an earthquake,
That is, the convex portion 2' of the band lug is held down by both sides of the cutout surface 3' against displacement not only in the two directions perpendicular to the axis of the flexible tube but also in the axial direction.

Although this is restricted, the tip of the convex portion 2' is rounded to allow free rotational movement around the central axis of the pipe.

Furthermore, it is necessary to provide a gap to release the circumferential thermal expansion of the pipe 1, but when adjusting this with the square structure 3, one groove of this triangular cutout surface is cut diagonally and the teniper is If attached, the amount of gap between the pipe 1 and the triangular cutout surface 3' can be easily adjusted by sliding the square structure 3 up and down. With the above structure, the compressive force and shear force generated on the contact surface between the pipe 1 and the band lug 2 due to the upper i load are dispersed and alleviated, so that the deformation of the support part of the pipe 1,
Breakage is avoided resulting in a reliable support structure.

Next, another embodiment of the present invention is shown in FIGS. 5 and 6. In FIG. 5, 1 is a pipe, 2 is a band lug, and 4' is a square piece having a triangular notch. In the frame-like structure, 5 is an embedded metal fitting.

FIG. 6 is a sectional view taken along the line XX in FIG. 5 and shows a state in which the pipe 1 is supported by the band 2.

The present embodiment has the above-mentioned configuration, and includes a pipe 1 and a frame-like structure 4 for supporting the pipe 1 located at the installation position of the pipe 1.
', and in the band lug 2 for restraining the pipe 1 provided between this frame-like structure 4' and the pipe 1, this band lug 2
is divided into two parts in contact with the outer diameter of the pipe 1, and the contact area of the pipe 1 is made larger in the part 2', and the convex part 2' whose tip is rounded forms a triangular part of the frame-like structure 4'. It is configured to be supported in line contact with the cutout surface 4' of the mold. That is, in this example.

This is an attempt to give the frame-like structure 4 the function of the square structure 3 with a triangular notch in Fig. 1, and since a notch is required, a square lumber is used, and a triangular notch is added to it. The items inserted constitute a frame-like structure 4'.

Therefore, the function itself of this embodiment is exactly the same as the previous example,
This restrains the translational movement of the metal on three sides and facilitates the rotational movement around the piping axis, but compared to the previous example, it may be possible to save the effort of welding the square support structure 3, or conversely, the frame shape Structure 4
It may be uneconomical to use a square piece of wood as the base and cut it into a triangular shape. however,
After all, the action of the compressive force and shear force generated on the contact surface between the pipe 1 and the band lug 2 on the pipe 1 side is dispersed and alleviated.
Deformation and damage to the support portion of the pipe 1 are avoided, and the support device remains highly reliable.

〔Effect of the invention〕

Since the present invention is configured and operates in this manner, it can produce the following effects. That is, (1) since the restraint reaction force is dispersed and relaxed, the distance between the pipe support devices can be increased.

(2) By using the triangular notch, the translation of the three-sided metal plate can be easily restrained.

(3) By rounding the convex tip of the piping restraint band lug, friction with the contact surface can be reduced and rotational movement around the piping axis can be facilitated.

(4) Since the piping and the lug are not welded, there is no occurrence of cracks due to carbon precipitation due to the adverse effects of welding.

(5) Since the piping and the lug are not welded, even if a crack occurs in the lug due to vibration during operation, it will not spread to the piping.

(6) Since the piping and lugs are not welded, there is no need for welding during construction, welding inspection, or non-destructive inspection of lug welds during inspection during service.

(7) Since the pipe support device is simple and has few components, installation costs and man-hours are reduced, and inspection is facilitated.

The above-mentioned moxibustion is highly reliable, is an inexpensive support device, and has great effects.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the pipe support device of the present invention, FIG. 2 is a sectional view taken along line XX in FIG. 1, and FIG. 3 is a sectional perspective view of a portion of the band lug in FIG. 1. , FIG. 4 is a perspective view of the rectangular structure shown in FIG. 1, FIG. 5 is a front view of another embodiment of the pipe support device of the present invention, and FIG. cross section,
Fig. 7 is a sectional view of a conventional piping restraint lug, and Fig. 8 is a sectional view of a conventional piping restraint lug.
FIG. 7 is a sectional view of the piping-lug, and FIG. 9 is a front view of a support device using a conventional three-way restraining lug. 1... Piping, 2... Band lug, 3... Square structure, 4... Frame-like structure, 5... Embedded hardware, 6...
・Welded lugs. 7th country 8th item

Claims (1)

[Claims] 1. Regarding the piping support device for nuclear power generation equipment, there is a frame-like structure for supporting the pipes at the location where the pipes are installed, and parts of this frame-like structure in the upper, lower, left, and right directions. A square structure with an attached triangular notch to directly support the pipe, and a piping restraint lug installed between the square structure and the pipe, whose inner diameter is in contact with the outer diameter of the pipe. It is divided into two parts or fixed with a plurality of bands, and is brought into contact with the piping almost all the way around the piping, and its outer peripheral end is in contact with both sides of the triangular cutout part of the square structure,
It restrains not only the vertical and horizontal movement but also the axial movement of the piping.
A pipe support device characterized in that the contact portion of the lug with the triangular notch of the square structure is rounded to facilitate rotational movement about the central axis of the pipe without restricting it.