CN110094453B - Foundation shock insulation and three-dimensional shock absorption structure of double-containment nuclear power station - Google Patents

Foundation shock insulation and three-dimensional shock absorption structure of double-containment nuclear power station Download PDF

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CN110094453B
CN110094453B CN201910397907.9A CN201910397907A CN110094453B CN 110094453 B CN110094453 B CN 110094453B CN 201910397907 A CN201910397907 A CN 201910397907A CN 110094453 B CN110094453 B CN 110094453B
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nuclear power
containment
vertical
shock
containment vessel
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CN110094453A (en
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侯钢领
王秉钧
孙晓丹
孙海
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Harbin Engineering University
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Harbin Engineering University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C13/00—Pressure vessels; Containment vessels; Containment in general
    • G21C13/02—Details
    • G21C13/024—Supporting constructions for pressure vessels or containment vessels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Plasma & Fusion (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The invention discloses a base shock insulation and three-dimensional shock absorption structure for a double-containment nuclear power station, which comprises the following components: the reactor core structure comprises an inner containment vessel, an outer containment vessel, a reactor core supporting structure, a reactor core structure, a horizontal shock insulation support, a vertical damper, a two-way hydraulic cylinder and a damping slide block, wherein the damping slide block is matched with the outer containment vessel in a vertical sliding damping mode, the end portion of a first piston rod of the two-way hydraulic cylinder is connected with the inner containment vessel, a second piston rod of the two-way hydraulic cylinder is connected with the damping slide block, and when the first piston rod moves horizontally, the second piston rod drives the damping slide block to slide relative to the outer. According to the basic shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station, the horizontal shock insulation support, the bidirectional hydraulic cylinder, the damping slide block, the vertical shock insulation support and the vertical damper are arranged to generate a three-dimensional shock absorption effect, the special shock insulation safety requirement of the nuclear power station can be met, and the shock insulation safety of the nuclear power station structure is remarkably improved.

Description

Foundation shock insulation and three-dimensional shock absorption structure of double-containment nuclear power station
Technical Field
The invention belongs to the technical field of double-containment nuclear power station shock absorption, and particularly relates to a basic shock insulation and three-dimensional shock absorption structure for a double-containment nuclear power station. The invention belongs to a passive control damping system, accords with dynamics and mechanical principles, and improves the anti-seismic safety of related structures and equipment thereof.
Background
In recent years, the construction level of nuclear power plants in China is continuously improved, and the nuclear power plants are gradually developed to the front of the world. Due to the importance of nuclear power plant safety and the high cost of accidents, the safety of nuclear power plant infrastructure is required to be improved by integrating various technologies, and each factor is critical to lack of safety, particularly earthquake-proof safety. Recent serious fukushima nuclear power plant accidents at 311 earthquakes in japan, and most of all even the united states of the atlantic, reported cases of detecting contamination from fukushima accidents, which again pushed nuclear power earthquake safety issues to the world public.
At present, a batch of nuclear power station projects which are advanced in China all adopt a design concept of a double-layer containment vessel, the double-layer containment vessel is adopted, an inner layer ensures that radioactive substances cannot leak under the condition that a reactor has an accident, an outer layer resists damage caused by external impact and can resist the impact similar to a commercial large airplane, a plant area can resist earthquake magnitude equivalent to that of a Japanese Fudao nuclear accident, and due to the randomness of earthquake, the earthquake response of the nuclear power station still needs to be reduced by adopting an advanced technology.
The nuclear power is located in the same place in the structure, and the structure size belongs to a small-size component compared with the earthquake, and the earthquake motion can be decomposed into horizontal and vertical earthquake motion under the assumption that the nuclear power station does not consider earthquake space difference, so that the earthquake easily causes serious damage to a reactor in the horizontal and vertical earthquake motion.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the foundation shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station, which has good shock resistance and stable shock absorption effect and can effectively convert horizontal shock into vertical shock.
According to the base shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station, the horizontal shock insulation support, the two-way hydraulic cylinder and the damping slide block are arranged, so that the inner containment displaces along the horizontal direction relative to the foundation to weaken and reduce the earthquake acting force, and the horizontal movement of the inner containment vessel is converted into vertical movement through the bidirectional hydraulic cylinder and the damping slide block, vertical friction damping force can be formed through the vertical movement, vertical damping of an inner shell structure and an outer shell structure is provided, vertical vibration of an inner containment vessel and an inner structure of the inner containment vessel is reduced, horizontal displacement of the inner containment vessel is slowed down, a three-dimensional shock absorption effect is generated from two horizontal directions and one vertical direction by a foundation shock absorption and three-dimensional shock absorption structure used for a double-containment vessel nuclear power station, the special anti-seismic safety requirement of the nuclear power station can be met, and the anti-seismic safety of the nuclear power station structure is remarkably improved.
The invention relates to a foundation shock insulation and three-dimensional shock absorption structure for a double-containment nuclear power station, which comprises the following components: an inner containment vessel, an outer containment vessel, a reactor core supporting structure, a reactor core structure, a horizontal shock insulation support, a vertical damper, a bidirectional hydraulic cylinder and a damping slide block, the outer containment vessel is fixedly connected with the ground, the inner containment vessel is connected with the foundation through the horizontal shock insulation support, the reactor core supporting structure is connected with the bottom plate of the inner containment through the vertical shock insulation support, the side wall of the core supporting structure and the inner containment vessel are connected through the vertical damper, the damping slide block is in sliding damping fit with the outer containment vessel along the vertical direction, the bidirectional hydraulic cylinder is in a bent shape, the end part of a first piston rod of the bidirectional hydraulic cylinder is connected with the inner containment vessel, a second piston rod of the bidirectional hydraulic cylinder is connected with the damping slide block, when the first piston rod moves horizontally, the second piston rod drives the damping slide block to slide relative to the outer containment vessel along the vertical direction.
According to the basic shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station, the horizontal shock insulation support, the two-way hydraulic cylinder, the damping slide block, the vertical shock insulation support and the vertical damper are arranged, so that the three-dimensional shock absorption structure which is used for combining the basic shock insulation and the vertical shock absorption of the hydraulic transmission mechanism of the double-containment nuclear power station is used for generating a three-dimensional shock absorption effect from two horizontal directions and one vertical direction, the special shock absorption safety requirement of the nuclear power station can be met, and the shock absorption safety of the nuclear power station structure is obviously improved.
According to the basic shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station, the horizontal shock insulation support is a laminated rubber support, the horizontal rigidity of the horizontal shock insulation support is far smaller than the vertical rigidity, the vertical shock insulation support is installed between the bottom plate of the inner containment and the reactor core supporting structure, the horizontal rigidity of the vertical shock insulation support is larger than the vertical rigidity, and the vertical damper is installed between the supporting component of the reactor core structure and the side wall of the inner containment.
According to the foundation shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station, the first piston rod is connected with the upper part of the outer wall of the inner containment.
According to the basic shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station, the bent cylinder body of the bidirectional hydraulic cylinder comprises a first hydraulic cylinder and a second hydraulic cylinder, the first hydraulic cylinder extends along the transverse direction, the second hydraulic cylinder extends along the vertical direction, the first hydraulic cylinder is communicated with the second hydraulic cylinder, a first piston of the first hydraulic cylinder and a second piston of the second hydraulic cylinder divide the bidirectional hydraulic cylinder into a first rod cavity, a rodless cavity and a second rod cavity, the first rod cavity is connected with the second rod cavity, and a first reversing valve and a second reversing valve are connected between the first rod cavity and the second rod cavity.
According to one embodiment of the invention, the base shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station further comprises an oil supply oil path, wherein the oil supply oil path is connected between the first reversing valve and the second reversing valve and comprises a hydraulic oil tank and a hydraulic pump.
According to the base shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station, a second temperature sensor and a radiator are further arranged in the hydraulic oil tank, and a first temperature sensor is arranged on the radiator.
According to the base shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station, the damping slide block is provided with the displacement sensor and the second temperature sensor.
According to the basic shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station, a vertical sliding groove is formed in the inner wall of the outer containment, and the damping sliding block is installed in the sliding groove.
According to the foundation shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station, the number of the bidirectional hydraulic cylinders is multiple, and the bidirectional hydraulic cylinders are arranged at intervals along the circumferential direction of the inner containment.
According to the foundation shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station, the inner containment comprises a shell body, and the first piston rod is connected with the upper end of the shell body.
According to one embodiment of the invention, the base shock insulation and three-dimensional shock absorption structure for the double-containment nuclear power station comprises an inner containment and a tuning mass damper, wherein the tuning mass damper is installed at the top end of the inner containment, and the first piston rod is connected with the tuning mass damper.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic structural diagram of a base seismic isolation and three-dimensional damping structure for a double containment nuclear power plant according to an embodiment of the invention;
fig. 2 is a partial enlarged view of fig. 1 at D.
Fig. 3 is a schematic structural view of a base seismic isolation and three-dimensional shock absorption structure for a double-containment nuclear power plant according to another embodiment of the present invention.
Reference numerals:
a base shock isolation and three-dimensional shock absorption structure 100 for a double containment nuclear power plant; a core support structure 200; a core structure 300; a foundation 400;
an inner containment vessel 11; a case body 111; tuned mass damper 112; an outer containment vessel 12; a chute 121; an inner containment floor 13;
a horizontal seismic isolation bearing 21; a vertical seismic isolation bearing 22; a vertical damper 23; a damping slider 24;
a displacement sensor 32; a first temperature sensor 33; a second temperature sensor 34;
a bidirectional hydraulic cylinder 8; (ii) a A first piston 711; a first piston rod 712; a second piston 721; a second piston rod 722; a first direction change valve 73; a second direction valve 74;
a hydraulic oil tank 91; a hydraulic pump 92; a heat sink 93; a filter 94; an overflow valve 95; a throttle valve 96.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to meet the requirement that the structure and equipment of a nuclear power plant are not allowed to be damaged by earthquake, the structural characteristics of the nuclear power plant with double containment vessels (an outer containment vessel 12 and an inner containment vessel 11) are exerted according to the actual condition of earthquake three-dimensional vibration (two horizontal directions and one vertical direction), and the invention provides a basic shock-insulation and three-dimensional shock-absorption structure 100 for the nuclear power plant with the double containment vessels. A base seismic isolation and three-dimensional seismic mitigation structure 100 for a double containment nuclear power plant according to an embodiment of the present invention will be described with reference to fig. 1 to 3.
As shown in fig. 1 to 3, a base seismic isolation and three-dimensional seismic mitigation structure 100 for a double containment nuclear power plant according to an embodiment of the present invention includes: the device comprises an inner containment vessel 11, an outer containment vessel 12, a horizontal vibration isolation support 21, a vertical vibration isolation support 22, a vertical damper 23, a bidirectional hydraulic cylinder 8 and a damping slide block 24. The damping slide block 24 is in damping fit with the outer containment vessel 12 in a vertical sliding mode, the bidirectional hydraulic cylinder 8 is bent, the end portion of a first piston rod 712 of the bidirectional hydraulic cylinder 8 is connected with the inner containment vessel 11, a second piston rod 722 of the bidirectional hydraulic cylinder 8 is connected with the damping slide block 24, and when the first piston rod 712 moves horizontally, the second piston rod 722 drives the damping slide block 24 to slide relative to the outer containment vessel 12 in the vertical direction.
As shown in fig. 1 and 3, the outer containment vessel 12 is connected with the foundation 400 in a fixed connection manner, the outer containment vessel 12 covers the inner containment vessel 11, the inner containment vessel 11 abandons the traditional fixed connection manner and is installed on a horizontal shock isolation support 21, the horizontal shock isolation support 21 adopts a rubber shock isolation support as a shock isolation layer, the horizontal shock isolation support 21 is installed on the foundation 400, and the horizontal stiffness of the horizontal shock isolation support 21 is smaller than the vertical stiffness, so that the stiffness of the horizontal connection between the inner containment vessel 11 and the foundation 400 is smaller, the inner containment vessel 11 can move in the horizontal direction relative to the foundation 400 during an earthquake, and a larger horizontal relative displacement between the inner containment vessel 11 and the outer containment vessel 12 is formed. The outer containment vessel 12 has a large structural rigidity, so that the earthquake horizontal displacement is small, while the inner containment vessel 11 has a small structural rigidity, so that the earthquake horizontal displacement is large, so that a large horizontal displacement difference can be generated between the inner containment vessel 11 and the outer containment vessel 12. Specifically, the inner containment 11 and the internal structure thereof are isolated from the ground by a horizontal isolation bearing 21, so as to isolate the energy transmitted to the nuclear power plant structure and equipment by the horizontal earthquake.
Specifically, the horizontal shock-insulation support 21 can disperse, weaken and dredge the earthquake acting force in the form of vibration of the inner containment vessel 11 relative to the foundation 400 along the horizontal direction, at the moment, the earthquake response of the horizontal shock-insulation support 21 is mainly concentrated on the base shock-insulation layer, so that the horizontal earthquake motion can be isolated, and the horizontal earthquake motion of the inner containment vessel 11 and the internal structure thereof is reduced.
As shown in fig. 1 to 3, a plurality of bidirectional hydraulic cylinders 8 are arranged between the inner containment vessel 11 and the outer containment vessel 12, and the plurality of bidirectional hydraulic cylinders 8 are arranged at intervals along the circumferential direction of the inner containment vessel 11.
As shown in fig. 2, the damping slider 24 is in damping fit with the outer containment vessel 12 in a vertical sliding manner, the bidirectional hydraulic cylinder 8 is bent, the end of the first piston rod 712 of the bidirectional hydraulic cylinder 8 is connected to the inner containment vessel 11, the second piston rod 722 of the bidirectional hydraulic cylinder 8 is connected to the damping slider 24, and when the first piston rod 712 moves horizontally, the second piston rod 722 drives the damping slider 24 to slide vertically relative to the outer containment vessel 12.
When the inner containment vessel 11 moves along the horizontal direction relative to the foundation 400, the first piston rod 712 is driven to move along the horizontal direction, so that the first piston rod 712 pushes the first piston 711, the bidirectional hydraulic cylinder 8 converts the horizontal force of the inner containment vessel 11 along the horizontal direction into hydraulic force and transmits the hydraulic force to the second piston rod 722, the hydraulic force is transmitted to the damping slide block 24 through the second piston rod 722, the damping slide block 24 slides along the vertical direction, a vertical friction damping force is formed through the vertical movement, the horizontal movement of the inner containment vessel 11 is converted into the vertical movement of the damping slide block 24, that is, the horizontal movement of the inner containment vessel 11 is converted into the vertical damping of the outer containment vessel 12, and the vertical vibration of the inner containment vessel 11 and the internal structure thereof.
The damping slider 24 is mounted on the inner wall of the outer containment vessel 12, and the second hydraulic cylinder is mounted on the inner wall of the outer containment vessel 12, so that the first hydraulic cylinder and the second hydraulic cylinder can be conveniently connected, and the second hydraulic cylinder and the damping slider 24 are mounted in the outer containment vessel 12, so that the second hydraulic cylinder and the damping slider 24 can be protected.
As shown in fig. 2, the damping slider 24 is mounted on the sliding groove 121, so that the sliding fit of the moving cam relative to the outer containment vessel 12 can be realized through the fit of the sliding groove 121 and the damping slider 24, and the fit structure is simple and has high reliability, thereby improving the performance of the hydraulic transmission mechanism. Anti-slip patterns can be arranged on the contact surface of the sliding groove 121 and the damping slider 24, or anti-slip coatings can be arranged on the contact surface of the sliding groove 121 and the damping slider 24 to enhance the sliding friction force between the sliding groove 121 and the damping slider 24, so that the sliding damping matching between the damping slider 24 and the outer safety shell 12 is realized.
As shown in fig. 2, the bent cylinder body of the bidirectional hydraulic cylinder 8 includes a first hydraulic cylinder and a second hydraulic cylinder, the first hydraulic cylinder extends along a horizontal direction, the second hydraulic cylinder extends along a vertical direction, the first hydraulic cylinder is communicated with the second hydraulic cylinder, a first piston 711 of the first hydraulic cylinder and a second piston of the second hydraulic cylinder divide the bidirectional hydraulic cylinder 8 into a first rod cavity, a rodless cavity and a second rod cavity, the first rod cavity is connected with the second rod cavity, and a first direction valve 73 and a second direction valve 74 are connected between the first rod cavity and the second rod cavity.
Thus, a vertical hydraulic cylinder of this shape may have the first piston rod 712 extending horizontally into the first rod chamber and the second piston rod 722 extending vertically into the second rod chamber, facilitating the arrangement of the first and second piston rods 712, 722.
In some embodiments, the base shock insulation and three-dimensional shock absorption structure 100 for the double-containment nuclear power plant further includes an oil supply path, the oil supply path is connected between the first reversing valve 73 and the second reversing valve 74, the oil supply path includes a hydraulic oil tank 91 and a hydraulic pump 92, a throttle valve 96 and an overflow valve 95 are connected between the hydraulic oil tank 91 and the driving oil path, a radiator 93 is further disposed in the hydraulic oil tank 91, the radiator 93 is provided with the first temperature sensor 33, and the damping slider 24 is provided with the displacement sensor 32 and the second temperature sensor 34.
The horizontal shaking (horizontal displacement) of the inner containment vessel 11 caused by the earthquake is transmitted to the first piston 711 through the first piston rod 712, and the first piston 711 does work on the hydraulic oil in the rodless cavity, so that the horizontal movement (namely, mechanical energy) transmitted to the first piston 711 from the inner containment vessel 11 through the first piston rod 712 is converted into the hydraulic energy of the hydraulic oil; the hydraulic oil in the rodless chamber transfers the hydraulic energy to the second piston 721, so that the second piston 721 applies work (i.e., the hydraulic energy is converted into mechanical energy), and then the second piston 721 pushes the second piston rod 722 to move vertically; the second piston rod 722 is connected with the damping slider 24, so that the second piston rod 722 pushes the damping slider 24 to move vertically, and horizontal shaking (horizontal displacement) generated by the inner containment 11 due to an earthquake is converted into vertical movement of the damping slider 24 through the first piston rod 712, the first piston 711, the second piston 721 and the second piston rod 722; the damping slider 24 is arranged in the sliding groove 121, the sliding groove 121 is fixed on the outer safety shell 12, the first temperature sensor 33 is arranged on the radiator 93, and the displacement sensor 32 and the second temperature sensor 34 are arranged on the damping slider 24, so that the temperature of the oil tank 91, the temperature at the damping slider 24 and the displacement of the damping slider 24 in the whole process are monitored in real time.
As shown in fig. 1 and 3, the base shock insulation and three-dimensional shock absorption structure 100 for the double-containment nuclear power plant further includes: the inner containment bottom plate 13, the vertical vibration isolation support 22 and the vertical damper 23.
The arrangement of the inner containment vessel bottom plate 13 realizes that the inner containment vessel 11 is installed on the horizontal shock-insulation support 21, and the horizontal rigidity of the vertical shock-insulation support 22 is greater than the vertical rigidity, so that the vertical shock insulation of the inner containment vessel 11 is realized, and the vertical shock of the inner containment vessel 11 is further reduced; the vertical damper 23 may prevent the core support structure 200 and the inner containment 11 from being collided with each other due to relative displacement in the horizontal direction, and thus limit the seismic reaction, thereby protecting the core structure 300 connected to the core support structure 200.
In some embodiments, as shown in fig. 1, the inner containment vessel 11 includes a shell body 111, and the first piston rod 712 is connected to the upper end of the shell body 111, and when an earthquake occurs, the first piston rod 712 is connected to the upper end of the shell body 111, so that the bidirectional hydraulic cylinder 8 absorbs the horizontal vibration of the inner containment vessel 11, thereby reducing the horizontal vibration of the inner containment vessel 11.
In other embodiments, as shown in fig. 3, the inner containment vessel 11 includes a shell body 111 and a tuned mass damper 112, the tuned mass damper 112 is mounted on the top end of the shell body 111, and the first piston rod 712 of the bidirectional hydraulic cylinder 8 is connected to the tuned mass damper 112, so that in the event of an earthquake, the tuned mass damper can provide a force with almost the same frequency and opposite to the structure movement direction to partially cancel the structure response caused by external excitation, and thus, the tuned mass damper can provide a force with opposite direction to the inner containment vessel 11 by itself to cancel the horizontal displacement of the partial inner containment vessel 11, and the first piston rod 712 of the bidirectional hydraulic cylinder 8 is connected to the tuned mass damper 112, so that the bidirectional hydraulic cylinder 8 absorbs the horizontal vibration of the tuned mass damper 112, and further, the horizontal vibration of the inner containment vessel 11 is reduced.
In some examples, tuned mass damper 112 may be a water tank filled with water that may be shaken in the water tank by the horizontal vibration of inner containment vessel 11 when an earthquake occurs, but due to the inertia of the water, the water in the water tank may provide a force that is approximately equal in frequency to the horizontal movement of inner containment vessel 11 and opposite in direction to the movement of inner containment vessel 11, thereby counteracting a portion of the vibration force to which inner containment vessel 11 is subjected.
According to the above description, the basic shock insulation and three-dimensional shock absorption structure 100 used for the double-containment nuclear power station is finally formed, the three-dimensional shock absorption effect is realized through the shock absorption arrangement in the horizontal two directions and the vertical one direction, the special shock-resistant safety requirement of the nuclear power station can be met, and the shock-resistant safety of the nuclear power station structure is remarkably improved.

Claims (9)

1. The utility model provides a basic shock insulation and three-dimensional shock-absorbing structure of double containment nuclear power station which characterized in that includes: the reactor core comprises an inner containment vessel, an outer containment vessel, a reactor core supporting structure, a reactor core structure, a horizontal shock insulation support, a vertical damper, a two-way hydraulic cylinder and a damping slide block, wherein the outer containment vessel is fixedly connected with the ground, the inner containment vessel is connected with a foundation through the horizontal shock insulation support, the reactor core supporting structure is connected with a bottom plate of the inner containment vessel through the vertical shock insulation support, the reactor core supporting structure is connected with the side wall of the inner containment vessel through the vertical damper, the damping slide block is in damping fit with the outer containment vessel along vertical sliding, the two-way hydraulic cylinder is in a bent shape, the end part of a first piston rod of the two-way hydraulic cylinder is connected with the inner containment vessel, a second piston rod of the two-way hydraulic cylinder is connected with the damping slide block, and when the first piston rod moves along the horizontal direction, the second, the cylinder body of two-way pneumatic cylinder of buckling type includes first pneumatic cylinder and second pneumatic cylinder, first pneumatic cylinder is along horizontal extension, vertical extension is followed to the second pneumatic cylinder, first pneumatic cylinder with the second pneumatic cylinder intercommunication, the first piston of first pneumatic cylinder with the second piston of second pneumatic cylinder will two-way pneumatic cylinder separates out first pole chamber, no pole chamber and second and has the pole chamber, first pole chamber with the second has the pole chamber to link to each other, just first pole chamber with the second has to be connected with first switching-over valve and second switching-over valve between the pole chamber.
2. The structure for shock isolation and three-dimensional shock absorption of a double-containment nuclear power plant as recited in claim 1, wherein the horizontal shock isolation support is a laminated rubber support, the horizontal stiffness of the horizontal shock isolation support is less than the vertical stiffness, the vertical shock isolation support is installed between the bottom plate of the inner containment and the support structure of the reactor core, the horizontal stiffness of the vertical shock isolation support is greater than the vertical stiffness, and the vertical damper is installed between the support member of the reactor core structure and the side wall of the inner containment.
3. The structure for foundation isolation and three-dimensional shock absorption of a double-containment nuclear power plant according to claim 1, wherein the first piston rod is connected to an upper portion of an outer wall of the inner containment.
4. The foundation shock insulation and three-dimensional shock absorption structure of the double-containment nuclear power plant as recited in claim 1, further comprising an oil supply path, wherein the oil supply path is connected between the first directional valve and the second directional valve, and the oil supply path comprises a hydraulic oil tank and a hydraulic pump.
5. The foundation shock insulation and three-dimensional shock absorption structure of the double-containment nuclear power plant as recited in claim 4, wherein a radiator is further arranged in the hydraulic oil tank, and a first temperature sensor is arranged on the radiator.
6. The foundation shock insulation and three-dimensional shock absorption structure of the double-containment nuclear power plant as claimed in any one of claims 1 to 5, wherein the damping slide block is provided with a displacement sensor and a second temperature sensor.
7. The structure of basic vibration isolation and three-dimensional shock absorption of a double-containment nuclear power plant as claimed in any one of claims 1 to 5, wherein the inner wall of the outer containment is provided with a vertical sliding groove, and the damping slide block is mounted on the sliding groove.
8. The double containment nuclear power plant foundation seismic isolation and three-dimensional seismic absorption structure as recited in any one of claims 1 to 5, wherein the bidirectional hydraulic cylinder is provided in plurality, and the plurality of bidirectional hydraulic cylinders are arranged at intervals along the circumferential direction of the inner containment.
9. The double-containment nuclear power plant foundation seismic isolation and three-dimensional shock absorption structure as claimed in any one of claims 1 to 5, wherein the inner containment comprises a shell body and a tuned mass damper, the tuned mass damper is mounted at the top end of the shell body, and the first piston rod is connected with the tuned mass damper.
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