JPS6398593A - Earthquakeproof supporter for large-sized vessel - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an earthquake-resistant support device for a large pressure vessel, such as an IM reactor vessel, and is a shag-type earthquake-resistant support device suitable for saving installation space. Regarding equipment.

[Conventional technology]

The conventional device is a convex shag (also called radial key) as described in Japanese Patent Application Laid-Open No. 61-20892 (Figure 7).
It consisted of a pair of recessed shag holders (also called radial key holders) and a plurality of pairs were installed at equal intervals between the outer periphery of the nuclear reactor vessel and the guard vessel. When a developing force is applied from the direction of the arrow in Fig. 7, the agricultural support equipment [3
When the sharugs 31d and 31g of 0d and 30g and the spacer 34 or 35 of the sharag receivers 32d and 32g come into contact, and the force increases further, the sharags are displaced within the elastic range due to the effect of the slit, creating a structure that supports the force. It became.

[Problems to be solved by the invention] The above-mentioned conventional technology has a structure that supports seismic force with the strength within the elastic range of the shag and shag holder. As the building grew larger, the seismic support equipment also became larger, and the building had to be larger as well. Furthermore, since it is supported elastically, it is only possible to expect an effect within the range of elastic damping in terms of damping the vibrations of seismic waves.

An object of the present invention is to provide an earthquake-resistant support device that requires a small installation space.

[Means for solving problems] As shown in FIG. 2, a pair of seismic support devices 10.

It is composed of a pair of a convex shag 11 and a concave shag holder 12, and as shown in FIG. 15 and surface 17 with the same inclination angle θ,
Further, one object of the present invention can be achieved by providing a structure in which the thickness dimensions M and N of the two projections 18 and 19 of the shag holder 12 are different, and the rigidity is different.

[Effect]

For ease of explanation, it is assumed that the seismic force W is applied from the direction indicated by the arrows in FIGS. 2 and 3, and the seismic support device 10 is marked with a ” Q, and the facing surfaces of the shear lug and the shear lug receiver are As shown in Fig. 3, is a tapered inclined surface angled with respect to the tangential direction of the installation part, and the seismic support device 10 is arranged at an equal angle θ equal to the inclination angle 0 of the surface. do.

A gap 13 is provided between the opposing surfaces of the shag 11 and the shag holder 12 to accommodate thermal expansion of the large container. Assuming that the dimensions of this gap 13 are the normal direction Q to the attachment part of the seismic support device, the direction perpendicular to the slope surface R1, and the tangential direction S to the attachment part, as shown in FIG. 4, the following relationship exists.

Q == S tan O= R/ cosθ
−(1) R=Ssin θ −(2
) When the force W is applied, the large container 4 and the guard vessel 8 undergo relative displacement, the gap 13 is closed, and the facing surfaces 14 of the shear lug 11 and the shear lug receiver 12 move to the position shown by the broken line in FIG. , 15, 16° 17 are the surfaces 14b and 16b of the seismic support device 10b placed at the direction of the force W and the angle θ from the relationship between the inclination at an angle of 0 and the above equations (1) and (2). .

Earthquake-resistant support equipment! When the surface 15j1 and the surface 17g of 10M first come into contact and the force W increases further, the protrusion dimension NQ of the shag holder 12Q is smaller than the protrusion dimension Mb of the shag holder, so the protrusion 19fi becomes a protrusion due to the difference in rigidity. 18b causes a larger elastic deformation.

Surfaces 1512 and 17Q, surfaces 14b and 16 that are in contact at the same time
The seismic support device 10a at the adjacent position
The surface 14a and the surface 16a, and the surface 15a and the surface 17a come into contact with each other. When the force W further increases, the seismic support device 10a
In this case, the same elastic deformation and sagging between the contact surfaces as described above occur. Furthermore, as the force W increases, the number of surfaces in contact increases sequentially, and elastic deformation and sliding are repeated in the same way as above, and the large container 4 and the guard vessel 8 become in a relatively twisted state of displacement, and the force W increases. Distributed across multiple seismic support devices. As described above, the seismic support device of the present invention supports a large container while absorbing the force and vibration of seismic energy by dispersing the force W and causing slippage between the contact surfaces.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5.

Figure 1 is a vertical cross-sectional view of the reactor plant, showing the reactor building 1.
A ring girder 3 is installed on a pedestal 2 provided at a pedestal 2, and a large vessel 4 has a core 5 and a core support structure 6 inside and is supported by the ring girder 3 at an upper flange 7. A roof slab 9 is provided in the upper opening.

Earthquake-resistant support equipment ff1o consists of large container 4 and guard vessel 8.
Multiple pairs are installed between.

FIG. 2 is an XX parent diagram of FIG. 1, and shows that a plurality of pairs of seismic support devices 10 are installed between the large container 4 and the guard vessel 8.

FIG. 3 is a partially enlarged view of FIG. 2, showing the seismic support device 101.
11.10a and 10b are shown, and FIG. 4 shows the gap 13 provided between the contact surfaces of the shear lug 11 and the shear lug receiver 12
The installation part normal direction dimension Q, the slope side perpendicular direction dimension R1 and the installation part tangential direction dimension S are shown.

When the earthquake force W is applied from the direction of the arrow in Fig. 2, the large container 4 and the guard vessel 8 undergo relative displacement, and the
1 n, 11 a, and 1 l b move to the positions indicated by the broken lines in Fig. 3, and the surfaces 15Q, 17Q, 14b, and 16b
When the two points first come into contact and the force W increases further, the protrusion 19Q of the shag holder 12+1 causes elastic deformation, and then the 1
Slip occurs between the contact surfaces of 5111 and surface 17Q, and surface 14b and surface 16b, and then the surface 14a and surface 16a and surface 15a and surface 17a of the seismic support device LOa come into contact, and when the force W increases further, the shag holder The protrusion 19a of 12a causes elastic deformation.

As mentioned above, the number of contact surfaces increases sequentially according to the magnitude of the force W, and the force W is distributed and supported, so even if the force W due to an earthquake becomes large, the force borne by one pair of the seismic support device 10 is not proportional to the magnitude of the earthquake force W.

FIG. 5 shows another embodiment of the invention. In this embodiment, a slit 22 is provided in one protrusion 21 of the shag holder 12, and the structure is such that the rigidity is different from that of the other protrusion 20.

FIG. 6 shows yet another embodiment of the invention. In this embodiment, the contact surface 24 of the protrusion 23 of the shag holder 12 has a smooth convex roundness, and the inclination angle γ of the contact surface 26 of the other protrusion 25 and the inclination of the contact surface 15 of the shag 11 are adjusted. The angle θ is changed to reduce the impact when the surfaces 15 and 26 come into contact.

〔Effect of the invention〕

According to the present invention, the seismic support device causes elastic deformation and sliding between the contact surfaces in accordance with the magnitude of the earthquake force.
Force is dispersed and vibrations are absorbed, and the pair of seismic support devices is smaller than conventional ones, thus requiring less installation space and making the building smaller. This is especially effective for plants in areas with high seismic zones.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of a nuclear reactor plant according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line X-X of FIG. 1, FIG. 3 is a partially enlarged view of FIG. 2, and FIG. An explanatory diagram of the void 13, FIG. 5 is a diagram showing another embodiment of the present invention, FIG. 6 is a diagram showing still another embodiment, and FIG. 7 is a diagram showing a conventional example. 4... Large container 1, 8... Guard vessel, 10.
...Earthquake-resistant support device, 11... Sharag, 12... Sharag receiver, 13... Gap, 14... Surface (Sharag), 15... Surface (Sharag), 16... Surface (Sharag) Uke), 17... and (Sharag Uke), 18...
Protrusion, 19...Protrusion, 20...Protrusion, 21.
...Protrusion, 22...Slit, 23...Protrusion,
24... Surface (sharug holder), 25... Protrusion, 2
6... side (sharag receiver).

Claims (1)

[Claims] 1. Consisting of a convex shear lug and a pair of concave shear lug holders having two protrusions sandwiching the protrusion of the shear lug from both sides, and forming a gap on the outer periphery of the large container. In an earthquake-resistant support device that supports a large container against horizontal seismic force, multiple pairs of shear lugs and shear lug receivers are installed in pairs. An earthquake-resistant support device for large containers characterized by having different rigidity dimensions of protrusions. 2. The seismic support device for a large container according to item 1, characterized in that a slit is provided in one of the projections of the shear lug receiver. 3. In item 1 above, the surface of one protrusion of the shear lug holder facing the shear lug has a smooth convex curved surface, and the slope of the surface of the other protrusion facing the shear lug is equal to the slope of the surface on the shear lug side. An earthquake-resistant support device for large containers characterized by a variable inclination angle.