JPS63285387A - Anti-vibration support device - 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 Industrial Application] The present invention relates to a vibration isolating support device, which is capable of following the movement of piping due to thermal expansion, and which restrains the piping in the event of an earthquake. The present invention relates to a vibration isolating support device that prevents vibration.

[Conventional technology]

Generally, the following functions are required of a pipe support device that supports pipes arranged along a wall surface.

Its function is to be able to follow the slow movement of piping due to thermal expansion, and to restrain the piping and prevent it from swinging when sudden external force is applied to the piping due to an earthquake.

Conventionally, mechanical snappers and oil snappers are well known as pipe support devices that have the above-mentioned functions. With mechanical snappers, when the piping expands thermally, the support device itself rotates using a combination of a ball screw and a pole nut to absorb the movement of the piping, and in the event of an earthquake, it applies a brake to the ball screw and pole nut to restrain the movement of the piping. . Further, the oil snapper performs the same function as the mechanical snapper by utilizing fluid pressure when the oil filled in the cylinder moves.

[Problem that the invention seeks to solve]

However, since the above-mentioned conventional mechanical snapper uses a ball screw, a pole nut, etc., its structure is complicated, which causes an increase in cost. Furthermore, when the oil snapper is used in an atomic couplant, the oil tends to deteriorate due to radiation, resulting in a decrease in reliability.

An object of the present invention is to provide a vibration isolation support device that has a simple structure and is highly reliable.

[Means for solving problems]

In order to achieve the above object, the vibration isolating support device of the present invention includes:
One end of an equal stress flat plate, which has a constant stress against bending moment at any position and relatively low rigidity, is fixed to a support member fixed to the wall surface via a bracket, and piping is connected to the other end of the equal stress flat plate. In a vibration isolating support device in which a support rod for supporting is fixed, the equal stress flat plate is arranged on the support member side symmetrically with respect to the support member, and its plane is orthogonal to the support member, while the Also on the rod side, the equal stress flat plate is arranged symmetrically with respect to the support rod, and its plane is orthogonal to the support rod, and the equal stress flat plates on the support member side and the support rod side are opposed to each other, and Its free ends are connected by a connecting member.

[Effect]

According to the above configuration, when the piping moves slowly due to thermal expansion, the equal stress flat plates on the supporting member side and the supporting rod side both deform within the elastic region and absorb the movement of the piping. Furthermore, when a sudden excessive load is applied to the piping due to an earthquake, the above-mentioned equal stress flat plates deform beyond the elastic region to the plastic region.
Absorbs energy from external forces and prevents pipes from swinging excessively.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

A vibration isolation support device according to the present invention is shown in FIG. In the figure, a bracket 1 is fixed to a wall surface 3 with anchor bolts 2. A support member 5 is connected to the tip of the bracket 1 via a spherical joint 4, and the support member 5 can swing back and forth, left and right around the spherical joint 4. 6 is a pin that fixes the spherical joint 4. A support rod 8 that supports the pipe 7 is disposed below the support member 5. The support rod 8 has a flange portion 8A provided at its upper portion fitted into a cylindrical portion 5A provided at the lower portion of the support member 5, and is supported by a pair of coil springs 9 disposed above and below the flange portion 7A. It is connected to the support member 5. Support rod 8
On the upper part of the support rod 8, an equal stress flat plate 10 having a shape as shown in FIG. It is located. Also, on the upper part of the support member 5, an equal stress flat plate 11 on the support member side, which has the same shape as the one on the support iron side, is arranged opposite to the one on the support iron side. The free ends of both the equal stress flat plates 10.degree.
11. 13 is piping 7
14 is a pin that connects the pipe clamp 13 and the support rod 8.

Note that the coil spring 9 constitutes an elastic body, and the frame 12 constitutes a connecting member.

Next, the shape of the equal stress flat plate 10.11 will be explained in detail. When the uniform stress flat plate 10.11 has a constant plate thickness, its plate width is determined by the following equation.

Here, b: plate width W: load applied to the plate end point X: distance from the load point σ: plate stress (constant) h: plate thickness equal stress plate 10. ．． When the width of the plate 11 is changed according to the above formula, when a bending moment is applied to the uniform stress plate 10.11, no local stress concentration occurs in the uniform stress plate 10.11, and the stress at any position is constant. Therefore, reliability is improved against deformation up to the plastic region. Furthermore, when one bending moment is applied, shearing force is also generated in the uniform stress flat plate 10.11, but since the uniform stress flat plate 10.11 has an elongated shape, the influence of the shear force is far greater than the influence of the bending moment. small. Therefore, at the position where the bending moment is zero (section A in Figure 2), the plate width is a according to the shearing force, and at other positions (section B in the same figure), the stress distribution is equal to the bending moment. Assume that the board is wide.

The operation of the vibration isolating support device configured as above will be explained.

When the pipe 7 moves slowly in the vertical direction due to thermal expansion, the support rod 8 moves in the same direction and applies a bending moment to the uniform stress flat plate 10. Since the rigidity of the uniform stress flat plate 10 is made relatively small, the uniform stress flat plate 10 easily undergoes elastic deformation. At the same time, the frame 12 fixed to the free end of the equal stress flat plate 10 moves slightly in the vertical direction, applying a bending moment to the equal stress flat plate 11. Since the rigidity of the equal stress flat plate 11 is also made relatively small, the equal stress flat plate 11 also easily undergoes elastic deformation. In this way, the movement of the pipe 7 is absorbed by both equally stressed flat plates 10,11.

Further, when a sudden excessive load is applied to the piping 7 due to an earthquake, a bending moment acts on the equal stress flat plate 10.11 in the same manner as described above. However, since the bending moment is quite large, the equal-stress flat plates 10.11 undergo plastic deformation beyond elastic deformation, absorbing the energy of the external force caused by the earthquake, and preventing large swings of the pipe 7. In addition, when the piping 7 moves in the left-right direction or the front-back direction, the movement is absorbed by the interaction between the equal stress flat plate 10.11 and the spherical joint 4.

According to this embodiment, since the coil spring 9 having sufficient rigidity is inserted between the support member 7 and the support rod 8, even if the equal stress flat plate 10.11 breaks in the plastic region, Also, the piping 7 is supported by the coil spring 8, and the safety of the piping system is ensured.

Further, the equal stress flat plates 10.11 may be arranged not only in a straight line shape with respect to the support member 5 and the support rod 8 as shown in FIG. 2, but also in a cross shape as shown in FIG. , or an equiangular radial arrangement is also possible.

Furthermore, when supporting high-load piping, as shown in Figure 4, there is no need to change the design of the uniform stress flat plates 10 and 11 to increase their thickness, and simply increase the number of flat plates 10 and 11 to achieve the desired purpose. can be achieved.

Further, when the equal stress flat plates 10.11 are stacked and fixed in this way, when the equal stress flat plates 10.11 are deformed, they rub against each other, so that the effect of absorbing the energy of external force is increased.

In addition, in the above explanation, the case where the anti-vibration support device is installed vertically on a horizontal wall surface is described, but the present invention is not limited to this.
Alternatively, it is also possible to mount it diagonally on the wall.

By attaching in each direction in this manner, the pipe can be supported three-dimensionally and an ideal pipe support state can be realized.

〔Effect of the invention〕

As explained above, according to the present invention, the equal stress flat plates are arranged symmetrically with respect to the support member and the support rod to support the piping, so the structure of the vibration isolating support device is extremely simplified. It becomes possible to realize a vibration isolation support device that is low cost, highly reliable, and does not require maintenance or inspection.

[Brief explanation of drawings]

FIG. 1 is a partially sectional front view of a vibration isolating support device according to the present invention, FIG. 2 is a view taken along the line ■-■ in FIG. 1, and FIG. 3 is a view showing another embodiment. FIG. 4 is a front view with a part of a vibration isolating support device in a cross section showing still another embodiment. DESCRIPTION OF SYMBOLS 1... Bracket, 3... Wall surface, 4... Spherical joint, 5... Support member, 7... Piping. 8... Support rod, 9... Coil spring, 10.11... Equal stress flat plate. 12...Frame, 13...Pipe clamp.

Claims (3)

[Claims] (1) One end of an equal stress flat plate, which has a constant stress against bending moment at any position and relatively low rigidity, is fixed to a support member fixed to a wall surface via a bracket, and the other end of the equal stress flat plate is fixed to a supporting member fixed to a wall surface via a bracket. In a vibration isolating support device in which a support rod for supporting piping is fixed at an end, the equal stress flat plate is arranged on the support member side symmetrically with respect to the support member, and its plane is orthogonal to the support member, On the other hand, on the support rod side, the equal stress flat plates are arranged symmetrically with respect to the support rod, with their planes perpendicular to the support rod, and the equal stress flat plates on the support member side and the support rod side are opposed to each other. A vibration isolating support device characterized in that the free ends thereof are connected by a connecting member. (2) The vibration isolating support device according to claim 1, characterized in that one of the support member and the support rod is provided with a stopper for preventing the support rod from falling off. (3) The vibration isolating support device according to claim 2, characterized in that at least one of the support member and the support rod is provided with an elastic body that urges the stopper to a neutral position.