JPS60175894A - Piping support apparatus - 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 [Technical Field of the Invention] The present invention relates to a piping support device, and particularly to a piping support device that suppresses the vibration of piping installed in a building when the building vibrates due to an earthquake or the like.

[Technical background of the invention and its problems]

As this type of piping support, oil snappers and mechanical snappers are used in nuclear power plants and the like.

However, oil snappers have the drawback of being prone to oil leakage due to deterioration of the sealing material and requiring periodic maintenance. In addition, mechanical snappers have a disadvantage that they are expensive because of their extremely complicated structure. Furthermore, since both snappers always support the piping, when the piping is thermally deformed, it may be restrained, and there is a fear that large thermal stress and reaction force may be generated in the piping.

[Purpose of the invention]

An object of the present invention is to provide a piping support device that has a simple configuration, does not require special maintenance, and restricts displacement of piping only when a building vibrates.

[Summary of the invention]

In order to achieve this object, the present invention comprises a pair of supports facing each other with the piping in between, and each supports. ;: l
, has a fixture to be fixed to the building and an abutting part facing the piping with a predetermined gap at its tip, and the fixture is movable straight in a direction toward and away from the piping. This device is characterized by comprising a supported restraint tool and a ratchet mechanism that allows the restraint tool to move in the above-mentioned approach direction and prevents movement in the above-mentioned separation direction.

[Embodiments of the invention]

Hereinafter, a piping support device according to an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, the piping support device consists of a pair of supports 12. ．． Roughly speaking, each port λ consisting of 2 is composed of a fixture 3, a restraint member≠, and a ratchet mechanism j. This fixture 3 is fixed to a steel frame member or the like of a building (not shown). The above-mentioned restraint tool is supported by a fixture 3 so as to be movable in directions A toward and away from the pipe 1, and at the tip of the restraint tool ≠ there is a stop facing the pipe 1 with a predetermined gap d. A contact part B is formed. This contact portion t has a concave shape corresponding to the outer shape of the pipe. Another ratchet mechanism! , a plurality of ratchet teeth 7 formed on the retainer ≠ and a fixing member 3
It is composed of a ratchet pawl g attached to the retainer ≠, and allows the retainer ≠ to move in the direction approaching the pipe l relative to the fixture 3, but prevents the retainer ≠ from moving relatively in the opposite direction. prevent. As shown in FIGS. 2 and 3, the ratchet pawl is rotatably supported by the bolter, and is pressed against the ratchet tooth 7 by an inertia adjustment mechanism attached to the bolter. is urged to do so. The porta passes through a bracket // protruding from the fixture 3.

Next, this effect will be explained.

Normally, there is a gap d between the contact part B of the restrainer≠ and the pipe/.
exists, so even if the pipe/is deformed due to heat, it will not be restrained by the restrainer 3.

Therefore, thermal stress and reaction force due to the above-mentioned restraint are likely to occur.

When the building vibrates in the inward direction due to an earthquake, etc., the fixture 3 vibrates together with the building, and the retainer ≠ tries to stand still due to inertial force. Since it is only allowed to move toward the pipe / relative to the above, the suppressor ≠ gradually approaches the pipe / due to the vibration, and finally the abutment part 6 moves toward the pipe /. It comes into contact with the pipe / to suppress the vibration of the pipe.

The function of the inertia force adjustment spring lO will be explained below.

When the retainer head moves in a direction closer to the piping/piece relative to the fixture 3 due to inertia force, the ratchet jaw 7 of the retainer head moves against the biasing force of the inertia force adjustment spring 10. lift and move.

However, if the force of the spring IO is too strong, the ratchet pawl g cannot be lifted and the above movement becomes impossible. On the other hand, if the paneka is weak, the restrainer ≠ will move toward the pipe / even when there is a slight inertial force. In this way, the inertia force adjustment spring IO can adjust the degree of vibration at which the support device operates.

〔Effect of the invention〕

As is clear from the above description, the piping support device according to the present invention has a simple structure, consisting of a fixing tool, a restraining tool, and a cut mechanism, and does not require any particular maintenance. In addition, since a gap is normally formed between the restrainer and the pipe, even if the pipe deforms due to heat, it will not be restrained.
Therefore, generation of thermal stress and reaction force due to the restraint can be prevented. On the other hand, when vibration occurs, the suppressor is moved forward by the ratchet mechanism and comes into contact with the piping, so that the vibration of the piping can be suppressed.

Also, it is important to know at what level of vibration the piping support device according to the present invention should be operated. As in the third embodiment, this can be easily set by adjusting the force of the spring that biases the ratchet pawl fqJ.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view schematically showing an embodiment of the piping support device according to the present invention, Fig. 2 is a front view showing a ratchet pawl, and Fig. 3 is a cross-sectional view taken along the line I-I in Fig. 2. It is. /...Piping, λ...Support, 3...Fixing tool, Hiroshi...Retaining tool,! ... Ratchet mechanism, t... Contact portion, 7... Ratchet tooth, g... Ratchet pawl. Application fee: 1 person Kiyoshi Inomata

Claims (1)

[Claims] (1) Equipped with a pair of supports facing each other with the piping in between, and each support has a fixture fixed to the building and an abutment part facing the piping with a predetermined gap at the tip, and is attached to the piping. It is composed of a restraining tool supported by the fixture so as to be movable in a straight line in the direction toward and away from the object, and a ratchet mechanism that allows the restraining tool to move in the approaching direction and prevents it from moving in the separating direction. A piping support device with I￥f characteristics. (,2) The ratchet mechanism according to claim 1 is characterized in that the ratchet mechanism is composed of ratchet teeth formed on the holding tool and a ratchet pawl attached to the fixing tool. Piping support device 0