JPH0711289Y2 - In-core seismic receiver - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a seismic receiving apparatus for in-core delivery.

[Prior Art] In a rear heat transfer section of a boiler furnace, a horizontal header 1 as shown in FIG. 3 is arranged in a furnace 4 through a furnace wall 3 composed of furnace wall tubes 2.

Such an in-furnace header 1 has a large weight by connecting a large number of heat transfer tubes, and the in-furnace header 1 has a furnace wall tube on the inner surface of the furnace wall 3 as shown in FIGS. The weight of the furnace wall 3 is supported by hooking the support metal fittings 6 fixed to the outer peripheral surface of the inner furnace header 1 to the support hooks 5 fixed to the fins 2'and the fins 2'in the width direction at a required interval. In addition, the rotation stopping device 7 for receiving the rotation moment of the in-furnace header 1 generated by the above support is provided outside the furnace wall 3.

Further, in order to receive an axial horizontal force f due to an earthquake in the in-core header 1, the vibration isolator 9 is installed in the connecting pipe 8 connected to the outside of the furnace wall 3 of the conventional in-core header 1. Was doing.

[Problems to be Solved by the Invention] However, conventionally, as described above, the axial movement of the reactor internal header 1 caused by the earthquake is restrained by the vibration isolator 9 provided outside the furnace wall 3. Therefore, the size of the vibration proof device 9 becomes large and the strength thereof is particularly high due to the recent increase in the size of the boiler, which causes a problem that the supporting structure around the connecting pipe 8 becomes larger and stronger.

The present invention transmits a load to a back stay (not shown) and a bumper (not shown) through the furnace wall by an axial horizontal force at the time of an earthquake due to the in-reactor pipe pulling to receive a large-scale protection conventionally provided outside the furnace wall. The purpose is to omit the shaker.

[Means for Solving the Problems] The present invention is an earthquake receiving device for restraining the axial movement of an in-reactor header arranged in a furnace, wherein the in-reactor header is arranged close to the furnace wall. , A receiving metal fitting having a required length in the axial direction is attached to a surface of the inner wall of the furnace facing the inner metal fitting, and an outer peripheral surface of the inner furnace fitting is located on an extension of the metal fitting. The present invention relates to a seismic receiving apparatus for in-reactor piping, which is characterized in that stoppers are attached so that both widthwise ends of the receiving bracket are sandwiched from both sides.

[Operation] The horizontal force f in the axial direction of the in-reactor pipe pulling due to the earthquake is transmitted to the furnace wall via the stopper and the receiving metal fitting, and further transmitted to the back stay to be supported.

At this time, the inner wall of the furnace is brought closer to the furnace wall, and the length in the width direction of the metal fitting is set to be large to reduce the moment acting on the furnace wall, so that the furnace wall is Can withstand enough.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show an embodiment of the present invention,
In place of the conventional vibration isolator 9 provided outside the furnace for supporting the axial movement of the furnace header 1 supported by the support hook 5, the support fitting 6 and the rotation stopping device 7 shown in the figure. An earthquake receiving device 10 is provided in the furnace 4.

The seismic receiver 10 is installed by bringing the in-reactor header 1 close to the inner surface of the in-furnace wall 3 and at an axial position of the in-reactor header 1 at a widthwise intermediate position of the inner surface of the in-furnace wall 3 facing the in-reactor header 1. A receiving metal fitting 11 having a required length 1 in the (width direction of furnace) is attached via a mounting plate 14 fixed to the furnace wall tube 2 of the furnace wall 3 and the fins 2 ', and further, the furnace of the inner furnace header 1 A stopper 1 which is located on an extension of the receiving metal fitting 11 on the surface facing the wall 3 and has both widthwise end portions of the receiving metal fitting 11 sandwiched from both sides with a required gap S.
It is composed by fixing 2,13. In the figure, 15 indicates a back stay.

In the above structure, by bringing the in-furnace header 1 closer to the furnace wall 3, the clearance t between the contact point 11 and the stopper wall 12 and 13 for transmitting the force and the furnace wall 3 is reduced, and If the length l of the metal fitting 11 in the width direction is made sufficiently long, the moment acting on the furnace wall 3 by the receiving metal fitting 11 becomes small, so that the axial movement of the in-reactor header 1 during an earthquake can be prevented by bending rigidity of the furnace wall 3. Can be sufficiently supported by
Therefore, the horizontal force f in the axial direction of the in-core pipe 1 at the time of the earthquake can be transmitted to the back stay 15 through the furnace wall 3 and further to a steel frame (not shown) to be supported.

As described above, the axial movement of the furnace internal header 1 is controlled by the furnace wall 3
The structure of the seismic receiving apparatus 10 can be made small and simple by receiving and restraining the seismic receiving apparatus.

In addition, the seismic receiving apparatus for in-core pipe arrangement of the present invention is not limited to the above-mentioned embodiment, and the length of the receiving tool can be arbitrarily selected, and the gist of the present invention is not deviated. It goes without saying that various changes can be made within the range.

[Effects of the Invention] As described above, according to the seismic receiving apparatus for the in-reactor header of the present invention, the axial movement of the in-reactor header can be received and restrained by the furnace wall. It is possible to provide a simple seismic receiving device by omitting the installation of a conventional large vibration isolator, and to achieve various excellent effects such as simplification of the configuration outside the furnace.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a plan view of FIG.
II-II arrow view, FIG. 3 is a plan view showing an example of a conventional in-reactor header, FIG. 4 is a plan view showing an example of an apparatus for supporting the in-reactor header on the furnace wall, and FIG. It is a VV arrow line view of FIG. Reference numeral 1 is a furnace inner pipe, 3 is a furnace wall, 4 is a furnace wall, 5 is a support hook, 6 is a support fitting, 7 is a rotation stopper, 10 is an earthquake receiving device, 11 is a receiving fitting, and 12 and 13 are stoppers. Show.

Claims (1)

[Scope of utility model registration request] 1. A seismic receiver for restraining axial movement of a reactor inner wall arranged in a furnace, wherein the inner reactor header is arranged close to a furnace wall, and a furnace on an inner surface of the furnace wall is provided. A receiving metal fitting having a required length in the width direction is attached to the facing surface of the inner pipe moving member, and both ends in the width direction of the receiving metal fitting are located on an extension of the receiving metal fitting on the outer peripheral surface of the furnace inner pipe moving member. A seismic receiver for in-reactor piping, which is equipped with stoppers so that the parts are pinched from both sides.