JP2011246152A - Device for supporting large container, and reactor vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for supporting a large container which can increase the capacity of a damping device without increasing the number of damping devices or enlarging the damping device.SOLUTION: The device of supporting the large container includes: a fixing structure 2 set up near the large container 1; a link mechanism 5 provided between the fixing structure 2 and the large container; and the damping devices 9a and 9b that are installed to the link mechanism 5 and attenuate the swinging of the large container 1 through the link mechanism 5. The link mechanism 5 expands the displacement of the large container 1, along with the swinging of the large container 1, to transmit to the damping device 9a and 9b so that the damping device 9a and 9b operate.

Description

  The present invention relates to a large vessel support device and a reactor vessel formed in a cylindrical shape like a steam generator of a pressurized water reactor, for example.

  In general, a support device for a cylindrical large vessel such as a steam generator of a pressurized water reactor is roughly fixed to a fixing structure for fixing the large vessel from the lateral direction, and the fixing structure. It comprises a support structure for supporting the large container from below and a plurality of damping devices.

  That is, as a support device for such a large container, there are support legs for supporting the large container from below, a lower support structure for supporting the lower part of the large container from the lateral direction, and an intermediate cylinder support for supporting the intermediate cylinder from the lateral direction. There is a structure having an upper support structure for supporting the upper portion thereof from the lateral direction and using an oil damper as a damping device.

  Specifically, for example, the technique described in Patent Document 1 supports the vertical part of the vertical steam generator, which is a large container, with a support member attached to the inner wall of the foundation structure, and the vertical steam. The mirror part at the upper end of the generator is supported by a support member attached to the inner wall of the foundation structure via a lug or the like.

Japanese Utility Model Publication No. 4-49444

  By the way, in the large container support device described above, it is necessary to increase the capacity of the damping device when it is necessary to improve safety against a large earthquake, or to cope with an increase in the size of the steam generator. If it occurs, it is necessary to change the attenuation device to a larger one or increase the number of the attenuation devices.

  However, when the size of the damping device is increased or the number of the damping devices is increased, it is necessary to widen the interval between the fixing structure and the steam generator, and there is a problem that the whole plant is increased in size.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and a large container support device capable of increasing the capacity of the attenuation device without increasing the number of the attenuation devices and without increasing the size thereof. The purpose is to provide a furnace vessel.

  In order to achieve the above object, a large container support device according to the present invention includes a fixing structure installed in the vicinity of the large container, and a link provided between the fixing structure and the large container. And a damping device that is attached to the link mechanism and damps the swinging of the large container via the link mechanism, wherein the link mechanism is configured to swing the large container. Along with the movement, the displacement of the large container is enlarged and transmitted to the damping device to operate the damping device.

  Further, the large container support device according to the present invention includes a fixing structure installed in the vicinity of the large container, and a support structure that supports the large container between the fixing structure and the large container. A link mechanism provided between the support structure and the fixing structure, and an attenuation device attached to the link mechanism and configured to attenuate the swing of the large container via the link mechanism. A support device for a large container, wherein the link mechanism is configured to operate the damping device by enlarging the displacement of the large container and transmitting it to the damping device as the large container swings. It is characterized by that.

  In order to achieve the above object, a furnace vessel according to the present invention includes a fixing structure installed in the vicinity of a steam generator, and a link mechanism provided between the fixing structure and the steam generator. And a damping device attached to the link mechanism and dampening the swing of the steam generator via the link mechanism, wherein the link mechanism is used to swing the steam generator. Along with this, the displacement of the large container is enlarged and transmitted to the attenuation device to operate the attenuation device.

  According to the present invention, it is possible to use a relatively small attenuation device without increasing the number of attenuation devices, and as a result, it is possible to reduce the size of the entire plant.

It is an elevation sectional view showing a 1st embodiment of a supporting device of a large sized container concerning the present invention. FIG. 2 is a plan sectional view taken along line II-II in FIG. 1. It is an enlarged view which shows the toggle link of 1st Embodiment. It is an enlarged view which shows the state which the toggle link of FIG. 3 act | operated. It is a plane sectional view showing a 2nd embodiment of a supporting device of a large container concerning the present invention. It is a longitudinal cross-sectional view which shows 3rd Embodiment of the supporting apparatus of the large sized container which concerns on this invention. It is a plane sectional view showing a 4th embodiment of a large container support device concerning the present invention.

  Below, each embodiment of the support apparatus of the large sized container which concerns on this invention is described with reference to drawings.

(First embodiment)
(Constitution)
FIG. 1 is a vertical sectional view showing a first embodiment of a large container support apparatus according to the present invention. 2 is a plan sectional view taken along line II-II in FIG. FIG. 3 is an enlarged view showing the toggle link of the first embodiment. FIG. 4 is an enlarged view showing a state in which the toggle link of FIG. 3 is activated.

  In FIG. 2, since a large number of internal structures are installed in the large container, the large container is illustrated in a solid shape, but is actually formed in a hollow cylindrical shape. The same applies to FIGS. 5 and 7.

  As shown in FIGS. 1 and 2, for example, a large vessel 1 that is a steam generator in a reactor vessel of a pressurized water nuclear power plant is installed in a fixing structure 2 in which concrete or the like is formed in a rectangular tube shape. . The large container 1 is formed in a hollow cylindrical shape, and is supported by the support device 3 in the fixing structure 2. The support device 3 generally includes an upper support structure 3a, an intermediate support structure 3b, a lower support structure 3c, a support leg 4 and a toggle link 5.

  The upper support structure 3a, the intermediate support structure 3b, and the lower support structure 3c are respectively attached between the inner wall surface of the fixing structure 2, and the upper, middle, and lower portions of the large container 1 are respectively laterally arranged. I support from. The support legs 4 are installed in the fixing structure 2 and support the bottom of the large container 1 from below.

  As shown in FIG. 2, the intermediate support structure 3 b is formed in an annular shape and surrounds the intermediate barrel of the large container 1. One end of each of the intermediate support structures 3 b is fixed to the outer periphery of the envelope 3 b 1. And four support portions 3b2 whose ends extend to the inner wall surface of the fixing structure 2 and are abutted against the inner wall surface.

  As shown in FIGS. 1 and 3, the toggle link 5 is installed between the fixing structure 2 and the intermediate support structure 3b. The toggle link 5 is fixed to the fixing structure 2 and the link fulcrum attachment part 5a fixed to the support part 3b2 of the intermediate support structure 3b, the link fulcrum 6a as a free end attached to the link fulcrum attachment part 5a. The link fulcrum 6b as a fixed end, the links 7a, 7b, 7c and 7d attached to the link fulcrums 6a and 6b, and the links 7a, 7b, 7c and 7d are connected to each other and will be described later. Link intermediate fulcrums 8a and 8b serving as connecting portions with the attenuation device.

  The expansion / contraction portions of the damping devices 9a and 9b are attached to the link intermediate fulcrums 8a and 8b of the toggle link 5, respectively. In order to attach these damping devices 9a and 9b up and down, damping device mounting portions 10a and 10b are formed on the inner wall surface of the fixing structure 2 so as to protrude vertically. Attenuator fulcrums 11a and 11b for attaching the attenuators 9a and 9b are provided on these attenuator attachment portions 10a and 10b.

  Here, in each link 7a, 7b, 7c, 7d, the displacement between the link intermediate fulcrum 8a and the link intermediate fulcrum 8b is larger than the displacement between the link fulcrum 6a and the link fulcrum 6b. Pre-designed. That is, each link 7a, 7b, 7c, 7d has a displacement between the link intermediate fulcrum 8a and the link intermediate fulcrum 8b rather than the displacement between the link fulcrum 6a and the link fulcrum 6b due to the swing of the large container 1. By enlarging, the displacement of the link intermediate fulcrum 8a and the link intermediate fulcrum 8b accompanying the swinging of the large container 1 is increased.

  As the damping devices 9a and 9b, for example, an oil damper, a disc spring friction damper, a lead damper, a mechanical snubber, etc., or any combination of these are appropriately selected and used.

(Work)
In the present embodiment configured as described above, for example, when the large container 1 that is a steam generator in a pressurized water nuclear power plant is vibrated by an inertial force in the horizontal direction due to an earthquake, the support structures 3a, 3b, and 3c are moved. The force is supported by the fixing structure 2. Further, the link fulcrum 6a moves horizontally via the link fulcrum attachment portion 5a attached to the intermediate support structure 3b, and the distance from the link fulcrum 6b fixed to the fixing structure 2 changes. Then, the link intermediate fulcrums 8a and 8b are displaced in the vertical direction via the links 7a, 7b, 7c and 7d.

  Specifically, the link intermediate fulcrum 8a is displaced obliquely upward on the fixing structure 2 side in FIG. 4, while the link intermediate fulcrum 8b is displaced obliquely below on the fixing structure 2 side. That is, the displacement of the link intermediate fulcrum 8a has a horizontal component in the left direction and an upper vertical component in FIG. 4, while the displacement of the link intermediate fulcrum 8b has a horizontal component in the left direction and a lower vertical component.

  Next, the damping devices 9a and 9b are rotated clockwise around the damping device fulcrums 11a and 11b attached to the damping device mounting portions 10a and 10b according to the diagonally upward and downward movement of the link intermediate fulcrums 8a and 8b, respectively. Oscillates counterclockwise. At this time, each link 7a, 7b, 7c, 7d has a displacement between the link intermediate fulcrum 8a and the link intermediate fulcrum 8b rather than a displacement between the link fulcrum 6a and the link fulcrum 6b as described above. Pre-designed to be large. Thereby, since the horizontal displacement of the large container 1 is expanded and the damping devices 9a and 9b attached to the link fulcrum 6a and the link fulcrum 6b are operated, a large damping force is obtained even with relatively small damping devices 9a and 9b. be able to.

  In the present embodiment, the oil damper used in the damping devices 9a and 9b can obtain a damping force due to the viscosity of the fluid. Further, the disc spring friction damper can obtain a damping force by friction of the material due to the pressing force of the disc spring. Further, the lead damper can obtain a damping force by elastic deformation and plastic flow of lead. Further, the mechanical snubber can obtain a damping force by the inertial force and friction of the internal rotating body.

  Furthermore, when each damping device 9a, 9b is an arbitrary combination of an oil damper, a disc spring friction damper, a lead damper, and a mechanical snubber, the damping force of each damping device 9a, 9b acts in a composite manner and Vibration can be damped.

(Effect)
As described above, according to the present embodiment, the toggle link 5 expands the displacement of the link intermediate fulcrums 8a and 8b with the damping devices 9a and 9b accompanying the swinging of the large container 1, so that the large container 1 in the event of an earthquake. Since the damping devices 9a and 9b can be operated by enlarging the horizontal displacement of the shaft, it is possible to use a relatively small damping device, easy installation, and downsizing of the entire plant. It becomes possible.

  Further, according to the present embodiment, it is possible to cope with relatively small vibrations to large vibrations by using a fluid viscous damper such as an oil damper for the damping devices 9a and 9b. Furthermore, by using a friction damper such as a disc spring friction damper, stable damping performance can be ensured even in a severe environment such as high temperature and high radiation. By using an elasto-plastic damper such as a lead damper, a large damping force can be obtained even with a relatively small size. Moreover, it can be set as the attenuation device of a comparatively long movable range by using a mechanical snubber. Furthermore, the advantage of each attenuation device can be effectively used by appropriately combining these various attenuation devices.

  In this embodiment, the example in which the attenuation devices 9a and 9b are attached to both the upper and lower sides has been described. However, the attenuation device may be attached to either the upper or lower side. In this case, any one of the links 7a and 7c and the link intermediate fulcrum 8a, and the links 7b and 7d and the link intermediate fulcrum 8b may be attached corresponding to the attached attenuation device 9a or attenuation device 9b.

(Second Embodiment)
FIG. 5 is a cross-sectional plan view showing a second embodiment of a large container support apparatus according to the present invention. In the present embodiment, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. The same applies to other embodiments.

  In this embodiment, as shown in FIG. 5, a toggle link having the same configuration as that of the first embodiment is attached so that the attenuators 9a and 9b operate in the horizontal direction.

  Specifically, the toggle link 15 of the present embodiment is on a line connecting the central axis of the large container 1 and the fixing structure 2 and slides to the left and right in FIG. A slide guide 12 composed of a linear guide that abuts movably, a link fulcrum 6a that is movably attached in accordance with the displacement of the slide guide 12, and a link fulcrum 6b that is fixed to the fixing structure 2. There are links 7a, 7b, 7c, 7d attached to these link fulcrums 6a, 6b, respectively, and link intermediate fulcrums 8a, 8b connecting these links 7a, 7b, 7c, 7d.

  The expansion / contraction portions of the damping devices 9a and 9b are attached to the link intermediate fulcrums 8a and 8b of the toggle link 15, respectively. In order to attach these damping devices 9a and 9b to the left and right in FIG. 5, the damping device mounting portions 10a and 10b protrude from the inner wall surface of the fixing structure 2 to the left and right, respectively. The damping device mounting portions 10a and 10b are provided with damping device fulcrums 11a and 11b for mounting the damping devices 9a and 9b on the surfaces facing each other.

  Furthermore, the link fulcrum 6a and the link intermediate fulcrums 8a and 8b are configured by universal joints (not shown).

(Work)
In this embodiment configured as described above, when the large container 1 vibrates due to an earthquake in the horizontal direction, the link fulcrum 6a moves downward in FIG. The distance from the link fulcrum 6b fixed to 2 changes. Then, the link intermediate fulcrums 8a and 8b are displaced in the left-right direction via the links 7a, 7b, 7c and 7d.

  Specifically, the link intermediate fulcrum 8a is displaced obliquely downward and downward on the fixing structure 2 side in FIG. 5, while the link intermediate fulcrum 8b is displaced obliquely downward and downward on the fixing structure 2 side. In other words, the displacement of the link intermediate fulcrum 8a has a horizontal component in the left direction and a downward vertical component in FIG. 5, while the displacement of the link intermediate fulcrum 8b has a horizontal component in the right direction and a vertical component below.

  Next, the damping devices 9a and 9b are respectively centered on the damping device fulcrums 11a and 11b attached to the damping device mounting portions 10a and 10b according to the movement of the link intermediate fulcrums 8a and 8b obliquely lower left and lower right. Swings clockwise and counterclockwise. At this time, each link 7a, 7b, 7c, 7d has a displacement between the link intermediate fulcrum 8a and the link intermediate fulcrum 8b rather than a displacement between the link fulcrum 6a and the link fulcrum 6b as described above. Pre-designed to be large. Thereby, since the horizontal displacement of the large container 1 is expanded and the damping devices 9a and 9b attached to the link fulcrum 6a and the link fulcrum 6b are operated, the relatively small damping device 9a, Even in 9b, a large damping force can be obtained.

  Moreover, in this embodiment, since the link fulcrum 6a is directly attached to the large container 1 without interposing a support structure, a support structure like the said 1st Embodiment becomes unnecessary.

  Furthermore, in this embodiment, since the link fulcrum 6a is brought into contact with the large container 1 via the slide guide 12, it is not affected by the lateral displacement of the large container 1.

  In this embodiment, since the link fulcrum 6a and the link intermediate fulcrums 8a and 8b are configured as universal joints, it is possible to follow the vertical movement of the link fulcrum 6a due to thermal deformation.

  In addition, in this embodiment, it is good also as a structure which increases a freedom degree further by attaching a slide guide or a universal joint also about another fulcrum.

(Effect)
As described above, according to the present embodiment, in addition to the effects of the first embodiment, the support structure is not required, and thus the entire apparatus can be relatively downsized. Further, by increasing the degree of freedom of the device by the slide guide 12 and the universal joint, it becomes possible to follow the three-dimensional vibration of the large container 1 and the load on each link 7a, 7b, 7c, 7d is reduced. Reliability and durability can be improved.

(Third embodiment)
(Constitution)
FIG. 6 is a longitudinal sectional view showing a third embodiment of the large container supporting apparatus according to the present invention.

  In this embodiment, the link fulcrum attaching portion 5a of the toggle link 25 shown in FIG. 6 is attached to an intermediate support structure that supports a large container (not shown).

  The toggle link 25 has a function as a slide fulcrum guide 13a, 13b fixed to the fixing structure 2 and formed in a rail shape, and a slider attached to the slide fulcrum guides 13a, 13b so as to be vertically movable. It has slide fulcrum 14a, 14b, link fulcrum 6a, link 7a, 7b attached to slide fulcrum 14a, 14b, and intermediate fulcrum 8c, 8d attached to these links 7a, 7b. The links 7a and 7b are formed to extend from the links 7a and 7b of the first embodiment, and link intermediate fulcrums 8c and 8d are attached to the extended portions. Here, the slide fulcrum guides 13a and 13b and the slide fulcrum 14a and 14b constitute a slide mechanism.

  The toggle link 25 includes a link fulcrum 6b fixed to the fixing structure 2, intermediate fulcrums 8a and 8b attached at substantially intermediate positions of the links 7a and 7b, the intermediate fulcrums 8a and 8b, and the link fulcrum 6b. And links 7c and 7d to be attached.

  The telescopic portions of the damping devices 9c and 9d are attached to the link intermediate fulcrums 8c and 8d of the toggle link 25, respectively. In order to attach these damping devices 9c and 9d up and down, damping device mounting portions 10a and 10b are formed on the inner wall surface of the fixing structure 2 so as to protrude vertically. The damping device mounting portions 10a and 10b are provided with damping device fulcrums 11c and 11d for mounting the damping devices 9c and 9d.

  The expansion / contraction portions of the damping devices 9a and 9b are attached to the link intermediate fulcrums 8a and 8b of the toggle link 25, respectively, as in the first embodiment. Attenuator attachment points 10a and 10b are provided with attenuator support points 11a and 11b for attaching the attenuators 9a and 9b.

(Work)
In the present embodiment configured as described above, when the large container 1 vibrates due to an inertial force in the horizontal direction due to an earthquake, the link fulcrum 6a becomes horizontal via the link fulcrum attachment portion 5a attached to the intermediate support structure. The distance between the link fulcrum 6b that moves and is fixed to the fixing structure 2 changes. Then, the slide fulcrums 14a and 14b move upward and downward with respect to the slide fulcrum guides 13a and 13b via the links 7a and 7b, respectively. As a result, the link intermediate fulcrums 8a, 8b, 8c, 8d are displaced in the vertical direction.

  Next, the damping devices 9c and 9d are operated in accordance with the vertical movement of the link intermediate fulcrums 8c and 8d, and the link intermediate fulcrums 8a and 8b move in the same manner as in the first embodiment. At this time, each link 7a, 7b, 7c, 7d is located between the link intermediate fulcrum 8a and the link intermediate fulcrum 8b, and between the link intermediate fulcrum 8b rather than the displacement between the link fulcrum 6a and the link fulcrum 6b. It is designed in advance so that the displacement between 8c and link intermediate fulcrum 8d is larger. Thereby, since the horizontal displacement of the large container 1 is expanded and the damping devices 9a, 9b, 9c, 9d attached to the link fulcrum 6a and the link fulcrum 6b are operated, relatively small damping devices 9a, 9b, 9c, Even in 9d, a large damping force can be obtained.

  In the present embodiment, the slide fulcrum guides 13a and 13b and the slide fulcrum points 14a and 14b are provided, so that the vibration force transmitted from the link fulcrum mounting portion 5a can be distributed and received together with the link fulcrum 6b. It becomes.

  Furthermore, in this embodiment, the links 7a and 7b are extended, and the link intermediate fulcrums 8c and 8d are attached to the extended portions, so that the horizontal vibration displacement of a large container (not shown) is further increased than the link intermediate fulcrums 8a and 8b. It becomes possible to enlarge. And since the some damping | damping apparatus 9a, 9b, 9c, 9d is attached, the damping force per one can be made small.

  In addition, in this embodiment, it is good also as a structure which aims at a further increase in damping force or size reduction of a damping device by attaching a some link intermediate | middle fulcrum and damping device.

(Effect)
As described above, according to this embodiment, in addition to the effects of the first embodiment, the slide fulcrum guides 13a and 13b are movably attached to the slide fulcrum guides 13a and 13b. Since the load on the fulcrum is reduced, it is possible to cope with a greater seismic force. In addition, it is possible to add additional damping devices 9c and 9d at positions where the vibration displacement can be further expanded, so that a much larger damping force can be obtained and the individual damping devices 9a, 9b, 9c and 9d can be obtained. Can be miniaturized.

(Fourth embodiment)
FIG. 7 is a plan sectional view showing a fourth embodiment of a large container support apparatus according to the present invention.

(Constitution)
In the present embodiment, as shown in FIG. 5, toggle links 5 having the same configuration as in the first embodiment are installed in two directions orthogonal to the lateral direction of the large container 1. The structure of the toggle link 5 is the same as that of the first embodiment.

(Work)
In this embodiment configured as described above, the same operation as in the first embodiment is performed, and a large damping force can be obtained even with relatively small damping devices 9a and 9b.

  In the present embodiment, the toggle links 5 are installed in two directions orthogonal to each other in the horizontal direction, so that the vibration of the large container 1 with two degrees of freedom in the horizontal direction can be attenuated.

(Effect)
Thus, according to the present embodiment, in addition to the effects of the first embodiment, it is possible to cope with vibrations in two directions perpendicular to each other in the lateral direction.

  The present invention is not limited to the above embodiments, and various modifications can be made. In each of the above embodiments, the example in which the steam generator in the furnace vessel of the pressurized water nuclear power plant is applied as the large vessel 1 is described. However, the present invention is not limited to this and can be applied to large vessels in other plants. .

  Moreover, although each said embodiment demonstrated the case where the large sized container 1 was installed in the fixing structure 2 formed in the rectangular tube shape, even if the fixing structure is another shape, a large sized container is fixed. It may be installed in the vicinity of the structural structure.

DESCRIPTION OF SYMBOLS 1 ... Large container 2 ... Structure for fixation 3 ... Support apparatus 4 ... Support leg 5 ... Toggle link 5a ... Link fulcrum attaching part 6a, 6b ... Link fulcrum 7a, 7b, 7c, 7d ... Link 8a, 8b ... Link intermediate fulcrum (Connection part)
9a, 9b ... damping device 10a, 10b ... damping device mounting portion 11a, 11b ... damping device fulcrum 12 ... slide guide 13a, 13b ... slide fulcrum guide 14a, 14b ... slide fulcrum 15 ... toggle link 25 ... toggle link

Claims (7)

A fixing structure installed in the vicinity of the large container, a link mechanism provided between the fixing structure and the large container, and swinging of the large container attached to the link mechanism A support device for a large container comprising a damping device for damping through a mechanism,
The link mechanism is configured to operate the damping device by enlarging the displacement of the large vessel and transmitting it to the damping device in accordance with the swing of the large vessel.
A support device for a large container. A fixing structure installed in the vicinity of the large container, a support structure that supports the large container between the fixing structure and the large container, and the support structure and the fixing structure. A large-sized container support device comprising: a link mechanism provided therebetween; and a damping device attached to the link mechanism to attenuate the swing of the large-sized container via the link mechanism,
The link mechanism is configured to operate the damping device by enlarging the displacement of the large vessel and transmitting it to the damping device in accordance with the swing of the large vessel.
A support device for a large container. In the link mechanism, at least two links are connected via a connection portion with the damping device, and an end portion of one link is used as a free end that moves as the large container swings, and an end of the other link A fixed end fixed to the fixing structure,
The apparatus for supporting a large container according to claim 1 or 2. The link mechanism has a free end side link extended to the fixing structure, and a slide mechanism is provided between the tip of the link mechanism and the fixing structure.
The apparatus for supporting a large container according to any one of claims 1 to 3, wherein: The damping device is additionally attached to the extended portion of the extended link via a connection portion;
The apparatus for supporting a large container according to claim 4. The link mechanisms were respectively installed in two directions orthogonal to the lateral direction of the large container;
The apparatus for supporting a large container according to any one of claims 1 to 5, wherein: A fixing structure installed in the vicinity of the steam generator, a link mechanism provided between the fixing structure and the steam generator, and swinging of the steam generator attached to the link mechanism A furnace vessel comprising a damping device for damping via the link mechanism,
The link mechanism is configured to operate the damping device by enlarging the displacement of the large container and transmitting it to the damping device in accordance with the swing of the steam generator,
A furnace vessel characterized by.

Images