JPS6312296Y2 - - Google Patents

Description

[Detailed description of the invention] The invention is designed to provide support for piping support devices in nuclear power plants, etc.
This relates to a piping support device that requires rigid restraint of piping in an earthquake-resistant design.

U-bolts are often used as support devices for restraining small and medium diameter pipes in a direction perpendicular to the pipe axis. An example of such a pipe support device is shown in Figure 1.
Referring to FIG. 2, U-bolts b are arranged on the pipe a at appropriate intervals, and the U-bolts b are fixed to support members c fixed to metal fittings d embedded in the building wall.

Conventionally, in order to fix the U-bolt b to the support member c, a structure as shown in FIGS. 3 to 5 has been used.

Figure 3 shows the case where pipe a is a small diameter pipe, and U
A nut e is attached to both ends of the bolt b from the bottom of the support member c.
are screwed together to fix the U-bolt b to the support member c. In Figure 4, pipe a is suitable for medium diameter pipes,
Two nuts e are screwed onto each end of the U-bolt b, and the two nuts e sandwich the support member c from above and below to fix the U-bolt b to the support member c.

The pipe support device must rigidly restrain the pipe a in the direction perpendicular to the pipe axis, but should not restrain the movement of the pipe a in the pipe axis direction so as to allow the expansion and contraction of the pipe a due to temperature changes. Therefore, a clearance must be provided between the pipe a and the U-bolt b. Therefore, in the case of FIG. 3, the nut e must be welded to the support member c.

In FIG. 5, a shim plate f is interposed between the pipe a and the support member c to absorb the weight of the pipe a when a gap occurs between the pipe a and the support member c.

By the way, in the conventional pipe support devices shown in Figs. 3 to 5, if a gap occurs between the pipe a and the U-bolt b, the gap at all the support points can be adjusted to zero using the shim plate f. is impossible, in small-diameter pipe a, it is necessary to weld nut e to ensure clearance between pipe a and U-bolt b, and overall the lateral load capacity of U-bolt b is There were drawbacks such as being small.

The purpose of this invention is to eliminate these drawbacks, improve mounting accuracy, facilitate mounting adjustment work, and improve the strength and rigidity of U-bolts. a U-bolt whose installation height is variable with a tightening nut; a pedestal having a concave piping support portion approximately in the center and slidably attached to the U-bolt at elongated portions at both ends; and the pedestal. and a nut which is screwed into the U-bolt at a notch provided in each elongated portion of the pipe to press the pedestal into pressure contact with the pipe.

Next, an embodiment of the present invention will be explained with reference to FIGS. 6 and 7. 1 is a pipe, 2 is a U-bolt, and two nuts 3 are screwed into each end of the U-bolt 2. Two nuts 3 sandwich the support member 4 from above and below, and the U bolt 2 is fixed to the support member 4 so as to be variable in height.

A pedestal 5 is interposed between the piping 1 and the support member 4, and the elongated portions at both ends of the pedestal 5 are loosely fitted into both legs of the U-bolt 2.
A concave pipe support portion 6 is formed on the side facing the pipe 1 .

The male threads carved into both legs of the U-bolt 2 are long, and the above-mentioned nut 3 is inserted here.
Separately, nuts 7 are screwed together to adjust the position of the pedestal 5, and are accommodated in notches provided in the long parts at both ends of the pedestal 5.
It is designed to regulate both ends.

When installing the piping system, first adjust the height of U-bolt 2 with bolt 3 so that the clearance between the upper half of piping 1 and U-bolt 2 is the specified value, and then fix the U-bolt 2 with bolt 3. If the gap between the member 4 becomes more than or less than a predetermined size,
By finely adjusting the position of the pedestal 5 by turning the nut 7, the pipe support 6 of the pedestal 5 is attached to the pipe 1.
The weight of the pipe 1 can be reliably transmitted to the support member 4 by bringing the pipes into close contact with each other.

Since the present invention has the above configuration,
Adjustment of the clearance between the piping and the U-bolt due to installation errors between the piping and the supporting member can be easily done using bolts with variable installation height, and the gap between the piping and the pedestal can be changed by turning the nut 7 to adjust the position of the pedestal 5. It can be adjusted by changing the weight of the pipe, and all support points can bear the weight of the pipe. Furthermore, the lateral load of the piping is transferred to U through the long parts at both ends of the pedestal.
Since this is transmitted to the bolt, deformation of the U-bolt is reduced, which has the effect of increasing load capacity and rigidity. Furthermore,
Since the nuts for adjusting the position of the pedestal are housed in the respective notches of the elongated portions at both ends of the pedestal, the lower limit height of the piping is not increased, and the range of adjustment for installation errors between the piping and the supporting member is wide.

[Brief explanation of the drawing]

Fig. 1 is a side view of the piping system, Fig. 2 is a longitudinal sectional front view of Fig. 1, Figs. The front view and FIG. 7 are side views of FIG. 6. DESCRIPTION OF SYMBOLS 1... Piping, 2... U bolt, 4... Supporting member, 5... Pedestal, 6... Piping support part, 7... Nut.

Claims (1)

[Scope of utility model registration request] A U-bolt that is attached to the support member with a variable installation height using a pair of tightening nuts, and a pipe support that has a concave shape approximately in the center and is slidably attached to the U-bolt at the long portions at both ends. A piping support device comprising: a pedestal; and a nut that is screwed into the U-bolt at a notch provided in each elongated portion of the pedestal to press the pedestal into pressure contact with the piping.