JPH0231666Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Field of industrial application) This invention is for connecting a vibration damper to the bent part of piping installed in power plants, chemical plants, etc. in order to prevent vibrations at the bent part. This is related to the clamp.

(Prior art) Conventionally, when connecting a vibration damper to a bent part of a piping system, something like a bracket was welded to the outside of the bent part of the pipe, that is, at the back, and the damper was connected to this. .

(Problem to be solved by the invention) As mentioned above, when welding something like a bracket to the back of a bent part of the pipe and connecting a damper to it, welding is easy because it is a bent part. In addition, particularly in the case of piping for nuclear power plants, inspection of welded parts is extremely strict, and the welding process is a heavy burden, as it requires troublesome heat treatment after welding.

This invention aims to solve the above-mentioned conventional problems and provide a pipe bend clamp that does not require welding.

(Means for Solving the Problems) In this invention, in order to solve the above conventional problems, the central position of the bent portion of the pipe P is gripped, and the outer end of the bent portion of the pipe is connected to a vibration damper. A pair of side band fittings 2 and 3 that grip both ends of the pipe bend, and a pair of side band fittings 2 and 3 that hold the ends of the pipe bend and the pipe of the central band fitting 1. The center band fitting 1 has arms 4 and 5 that connect the inner end of the bent portion, and a radius of rotation about the arm connecting portion of the central band fitting 1 is set smaller than the outer radius of curvature of the pipe P. It is configured so that it cannot be rotated.

(Function) The clamp of this invention is used by connecting a vibration damper to the outer end of the central band fitting 1. When the pipe P is about to vibrate due to an earthquake or the like, a vibration suppressor connected via a clamp suppresses this vibration. The central band fitting 1 has one end supported by the side band fittings 2 and 3 on both sides by arms 4 and 5, and the other end has a smaller radius of curvature than the radius of curvature on the outside of the pipe, so it cannot be rotated. Therefore, it is firmly fixed to the pipe P. Therefore, the pipe P and the damper are connected without any play, without relative movement due to the vibration of the pipe P.

(Example) As illustrated in the drawings, the clamp of the present invention has the following features:
A central band fitting 1, a pair of end band fittings 2,
3, and arms 4 and 5 connecting the two end band fittings and the central band fitting.

The central band fitting 1 is a pair of curved rectangular plates with screw holes bored at both ends, and bolts 6, 6.
grips the center of the pipe bend, and the outer end is connected to a vibration suppressor (not shown).

The two side band fittings 2 and 3 are also similar to the central band fitting 1, and bolts 7, 7, 8, and 8 hold both ends of the pipe bend.

The arms 4 and 5 have one end connected to the side band fittings 2 and 3.
The other end is connected to the inner end of the central band fitting 1 by bolts 9, 10, and 11, respectively. The arms 4 and 5 may be integrally connected to each other in an L-shape, or may be separate from each other.

Thus, the center band fitting 1 is set so that the radius of rotation about the bolt 11 is smaller than the radius of curvature of the outside of the bent portion of the pipe, and therefore cannot be rotated.

Next, the operation of this embodiment will be explained.

The clamp of this embodiment is used by connecting a vibration suppressor (not shown) to the outer end of the central band fitting 1.
When the pipe P is about to vibrate due to an earthquake or the like, a vibration suppressor connected via a clamp works to suppress this vibration. The central band fitting 1 has arms 4 and 5 on one end side, and side band fittings 2 on both sides.
3, and the other end cannot rotate because the radius of rotation around the bolt 11 is smaller than the radius of curvature of the outside of the pipe, and therefore it is firmly fixed to the pipe P. Ru. That is, the central band fitting 1 connects the pipe P and the damper without any play, without relative movement due to the vibration of the pipe P.

(Effects of the invention) As explained above, in this invention, the center band fitting 1 which grips the central position of the bent part of the pipe P and whose end outside the bent part of the pipe is connected to the vibration suppressor, and A pair of side band fittings 2 and 3 gripping both end positions of the bent portion, ends of these side band fittings 2 and 3 on the inside of the pipe bending portion, and an end of the central band fitting 1 on the inside of the pipe bending portion. The central band fitting 1 is provided with connecting arms 4 and 5, and the radius of rotation about the arm connection portion of the central band fitting 1 is set smaller than the outer radius of curvature of the pipe P, so that rotation thereof is not possible. Because of this configuration, the damper can be easily connected to the pipe P without welding the pipe P, and therefore without requiring heat treatment or strict welding inspection.

[Brief explanation of the drawing]

The drawing is a front view showing an embodiment of the present invention. 1... Central band fitting, 2, 3... Side band fitting, 4, 5... Arm, P... Piping.

Claims (1)

[Scope of utility model registration request] A central band fitting that grips the central position of the pipe bend and whose outer end of the pipe bend is connected to the vibration suppressor, a pair of side band fittings that grip both end positions of the pipe bend, and these side bands. an arm that connects an end of the fitting on the inside of the piping bend and an end of the central band fitting on the inside of the piping bend; A clamp for supporting a bent part of a pipe, characterized in that it is set smaller than the radius of curvature and cannot be rotated.