JPH11336950A - Piping restraint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce welded places and improve the handling of piping at the weld inspection time. SOLUTION: In a pipe restraint welded plural claws 5 to a pipe 1, fitted two rings 7 on the pipe 1 while holding these claws 5, connected both rings 7 by a connection member 8 and connected an arm 9 for fixing against both rings 7, the load acting to the pipe 1 is transmitted to the ring through the claws 5 and further, to the building through the arm 9 and the displacement of the pipe 1 is restrained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping restraint for supporting high-temperature and high-pressure piping of various plants that handle high-temperature and high-pressure fluid such as boiler equipment and petrochemical plants.

[0002]

2. Description of the Related Art When a pipe for high temperature and high pressure is installed, a base point is provided at a required place, and the base point is fixed to a building via a pipe restraint. The base point includes a base point in the axial center direction, a base point in the radial direction of the pipe, and the like. Hereinafter, a pipe restraint provided at the extension base point will be described.

FIGS. 5A and 5B show a conventional piping restraint.

In FIG. 1, reference numeral 1 denotes a pipe, and 2 denotes a pipe support. A ring 3 is fitted to the pipe 1 and an arm 4 is welded to the ring 3. The arm 4 is adapted to be held by the pipe support 2. The claw 5 is welded to the pipe 1 in the generatrix direction of the pipe 1 with the ring 3 interposed therebetween. The claws 5 are arranged at three places on one side, a total of six places, such that one end thereof is in contact with the ring 3.

The ring 3 is restrained from being displaced in the longitudinal direction of the pipe by the claw 5 with respect to the pipe 1,
Is held by the pipe support 2 via the arm 4. Thus, the pipe 1 is restricted from being displaced in the longitudinal direction,
When a longitudinal load is applied to the pipe 1 or a bending moment is applied, the load is transmitted to the pipe support 2 via the claw 5, the ring 3, and the arm 4.

[0006]

In the conventional piping restraint described above, many claws must be welded to the piping. In a high-temperature and high-pressure pipe, a strict welding inspection must be performed to check whether or not a welding portion has a welding defect. An increase in the number of welding points increases the cost required for the welding inspection, which is not preferable. Furthermore, when a thrust load and a bending moment act on the pipe, not all of the claws contribute to the load transmission, but only about half of the claws in each state. Further, when the claws are welded to the pipe, the ring and the arm are integrated with the pipe, so that handling of the pipe becomes troublesome, and there is a problem that workability such as inspection work is poor.

The present invention has been made in view of the above circumstances, and has an object to reduce the number of welding points and to improve the handling of a pipe during a welding inspection operation.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a plurality of claws are welded to a pipe, two rings are fitted to the pipe with the claws interposed, and both rings are connected by a connecting member. In contrast, the present invention relates to a pipe restraint in which a fixing arm is connected, a load acting on the pipe is transmitted to a ring via a claw, further transmitted to a building via an arm, and displacement of the pipe is transmitted. Be bound.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, the same components as those shown in FIG. 5 are denoted by the same reference numerals.

Three substantially strip-shaped claws 5 are welded along the longitudinal direction of the pipe 1. Two rings 7, 7 sandwiching the claw 5
Is fitted to the pipe 1, and is bridged between the rings 7, 7, and three connecting members 8 are welded between the rings 7, 7. One of the connecting members 8 is arranged at the uppermost position of the rings 7, 7,
The other two connecting members 8 are arranged symmetrically. An arm 9 is vertically welded to the uppermost connecting member 8, and a triangular reinforcing plate 10 is mounted between the arm 9 and the connecting member 8, the arm 9, and the ring 7. The upper end of the arm 9 is held by the pipe support 2. The claw 5 is clamped by two rings 7, 7 and the rings 7, 7 are connected by the connecting member 8, whereby the relative displacement between the rings 7, 7 and the pipe 1 is restricted, and the arm By holding the pipe 9 at the pipe support 2, the displacement of the pipe 1 in the longitudinal direction is restricted by the pipe support 2.

When a longitudinal load is applied to the pipe 1 or a bending moment is applied, a load is transmitted to one or both of the rings 7, 7 via the claws 5, and the connection is further performed. It is transmitted to the pipe support 2 via the member 8 and the arm 9. All of the claws 5 contribute to such load transmission, and there are no useless claws 5.

FIG. 3 shows a second embodiment. In the second embodiment, four claws 5 for engaging with the rings 7 and 7 are welded to the pipe 1, and between the rings 7 and 7. Are connected by four connecting members 8.

FIG. 4 shows a third embodiment. In the third embodiment, four pawls 5 and four connecting members 8 are provided in the same manner as in the second embodiment, and furthermore, in the horizontal direction. The arm 9 that extends is provided symmetrically.

In the above embodiment, the arm 9 is connected to the rings 7, 7 via the connecting member 8.
The ring 7, via members such as the reinforcing plate 10,
7 may be connected. In addition, the number of claws 5 and the number of arms are not limited to the above-described embodiment, and may be appropriately selected depending on usage conditions such as a pipe diameter, a transmission load, and the like. It is not limited. Further, it goes without saying that the shape of the reinforcing plate 10, the arrangement of the claws, the connecting members, and the like can be variously changed.

[0015]

As described above, according to the present invention, the number of claws is halved, and the number of welding points on the pipe is also halved. Therefore, the welding inspection work is greatly reduced, the inspection cost is reduced, and the welding inspection work is performed. The rings 7, 7 and the like do not need to be attached, and there are no unnecessary parts for welding inspection, so that excellent effects such as remarkable improvement in pipe handling and inspection workability are exhibited.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2A is a side sectional view showing the embodiment of the present invention, and FIG. 2B is a front sectional view.

FIG. 3 is a front sectional view showing a second embodiment of the present invention.

FIG. 4 is a front sectional view showing a third embodiment of the present invention.

FIG. 5A is a side sectional view showing a conventional example, and FIG.
Is a front sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Piping 2 Piping support part 5 Claw 7 Ring 8 Connecting member 9 Arm 10 Reinforcement plate

Claims (1)

[Claims] 1. A plurality of claws are welded to a pipe, two rings are fitted to the pipe with the claws interposed, the two rings are connected by a connecting member, and a fixing arm is connected to the two rings. A piping restraint characterized by the following.