Equipment shock isolation system, equipment shock isolation method and nuclear power equipment plant

Abstract

The invention discloses an equipment shock isolation system, an equipment shock isolation method and a nuclear power equipment plant. The equipment shock isolation system comprises a sensor, first computer equipment, servo equipment and an actuator assembly. And the sensor is used for monitoring a three-dimensional seismic oscillation signal of the bottom of the foundation where the target equipment is located. And the first computer equipment is electrically connected with the sensor, and the first computer equipment is used for calculating target displacement data of the target equipment according to the three-dimensional seismic oscillation signal. And the actuator assembly is connected with the target equipment. And the servo equipment is connected with the actuator assembly and used for receiving the target displacement data sent by the first computer equipment and controlling the actuator assembly to drive the target equipment to perform target displacement according to the target displacement data, and the direction of the target displacement is opposite to the moving direction generated by the target equipment in response to the seismic waves. The equipment shock insulation system can effectively reduce the anti-seismic cost of nuclear power equipment.

Description

Technical Field

[0001] The present invention specifically relates to a device isolation system, a device isolation method, and a nuclear power equipment plant. Background Art

[0002] At present, the seismic design of nuclear power equipment uses the floor response spectrum of the plant as the input and is fixed on the equipment foundation through anchor bolts embedded in the floor slab of the plant. In other words, the existing seismic design method is to strengthen the structure of the equipment itself according to the floor response spectrum, and then fix the equipment on the equipment foundation through connecting parts such as anchor bolts to meet the seismic requirements of the equipment.

[0003] This method requires improving the strength of the equipment itself and leaving enough reinforcement bars and anchor bolts for the equipment foundation to fix the equipment. However, nuclear power equipment is an important part of a nuclear power plant, with a huge number and a wide variety of types. Different seismic requirements need to be implemented according to the seismic classification. For different seismic classifications, the requirements for the equipment itself and its installation and fixation are very different.

[0004] Therefore, the existing seismic methods need to optimize the strength design of the structures of the equipment under each seismic classification respectively, which will greatly increase the seismic cost of current nuclear power equipment. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a device isolation system, a device isolation method, and a nuclear power equipment plant to effectively reduce the seismic cost of nuclear power equipment in view of the above deficiencies in the prior art.

[0006] According to an embodiment of the first aspect of the present invention, a device isolation system for isolating a target device is provided. The system includes: a sensor, a first computer device, a servo device, and an actuator assembly. The sensor is used to monitor the three-dimensional ground motion signal at the bottom of the foundation where the target device is located. The first computer device is electrically connected to the sensor, and the first computer device is used to calculate the target displacement data of the target device according to the three-dimensional ground motion signal. The actuator assembly is connected to the target device. The servo device is connected to the actuator assembly and is used to receive the target displacement data sent by the first computer device and control the actuator assembly to drive the target device to perform a target displacement according to the target displacement data. The direction of the target displacement is opposite to the moving direction of the target device in response to seismic waves.

[0007] Preferably, the system further includes a second computer device, which is configured to obtain the earthquake early warning signal sent by the earthquake monitoring network early warning system, and the time node when the earthquake early warning signal reaches the second computer device is earlier than the time node when the sensor monitors the three-dimensional ground motion signal; the second computer device is electrically connected to the servo device and is further configured to control the servo device to start according to the earthquake early warning signal.

[0008] Preferably, the system further includes a power supply unit, the second computer device is electrically connected to the servo device through the power supply unit, and the second computer device controls the power supply unit to supply power to the servo device to start the servo device when receiving the earthquake early warning signal.

[0009] Preferably, the first computer device includes a calculation unit and a processing unit. The calculation unit is electrically connected to the sensor and is configured to calculate the vibration response data of the target device according to the three-dimensional ground motion signal; the processing unit is electrically connected to the calculation unit and is configured to obtain the target displacement data of the target device according to the vibration response data.

[0010] Preferably, the three-dimensional ground motion signal includes: the acceleration value of the seismic wave in the first direction, the acceleration value of the seismic wave in the second direction, and the acceleration value of the seismic wave in the third direction, and the first direction, the second direction, and the third direction are perpendicular to each other; the vibration response data includes: the first response displacement value, the second response displacement value, and the third response displacement value. The first response displacement value is the moving value of the target device in the first direction in response to the seismic wave, the second response displacement value is the moving value of the target device in the second direction in response to the seismic wave, and the third response displacement value is the moving value of the target device in the third direction in response to the seismic wave; the target displacement data includes: the first target displacement value, the second target displacement value, and the third target displacement value. The numerical value of the first target displacement value is equal to and the direction is opposite to that of the first response displacement value, the numerical value of the second target displacement value is equal to and the direction is opposite to that of the second response displacement value, and the numerical value of the third target displacement value is equal to and the direction is opposite to that of the third response displacement value.

[0011] Preferably, the actuator assembly includes a first actuator unit, a second actuator unit, and a third actuator unit. The servo device is respectively connected to the first actuator unit, the second actuator unit, and the third actuator unit. The first actuator unit is arranged along a first direction, the second actuator unit is arranged along a second direction, and the third actuator unit is arranged along a third direction. The first actuator unit, the second actuator unit, and the third actuator unit are all connected to the target device. The servo device is configured to control the first actuator unit to drive the target device to move along the first direction according to a first target displacement value, and to control the second actuator unit to drive the target device to move along the second direction according to a second target displacement value, and to control the third actuator unit to drive the target device to move along the third direction according to a third target displacement value.

[0012] Preferably, the first actuator unit includes a first piston rod and a first main body. The first main body is disposed opposite to the target device along the first direction. One end of the first piston rod is slidably connected to the first main body, and the other end is connected to the target device. The first piston rod is capable of moving along the first direction. The second actuator unit includes a second piston rod and a second main body. The second main body is disposed opposite to the target device along the second direction. One end of the second piston rod is slidably connected to the second main body, and the other end is connected to the target device. The second piston rod is capable of moving along the second direction. The third actuator unit includes a third piston rod and a third main body. The third main body is disposed opposite to the target device along the third direction. One end of the third piston rod is slidably connected to the third main body, and the other end is connected to the target device. The third piston rod is capable of moving along the third direction.

[0013] Preferably, the first actuator unit, the second actuator unit, and the third actuator unit are all hydraulic actuators.

[0014] Preferably, the servo device includes a servo valve and an oil pump. The servo valve is connected to the oil pump. The oil pump is respectively communicated with the hydraulic chambers of the first actuator unit, the second actuator unit, and the third actuator unit. The servo valve is configured to control the oil pump to respectively fill / extract hydraulic oil into / from the hydraulic chambers of the first actuator unit, the second actuator unit, and the third actuator unit according to the target displacement data, and thereby drive the first piston rod, the second piston rod, and the third piston rod to move respectively, so as to drive the target device to move.

[0015] Preferably, the system further includes: a reaction wall, which includes a first reaction surface, a second reaction surface, and a third reaction surface. The first reaction surface lies in the plane determined by the second direction and the third direction, the second reaction surface lies in the plane determined by the first direction and the third direction, and the third reaction surface lies in the plane determined by the first direction and the second direction. The first main body, the second main body, and the third main body are respectively installed on the first reaction surface, the second reaction surface, and the third reaction surface.

[0016] According to an embodiment of the second aspect of the present invention, there is provided a nuclear power equipment plant building, including: nuclear power equipment, a plant floor slab, and the above-mentioned equipment isolation system. The equipment isolation system is installed on the plant floor slab, and the nuclear power equipment is connected to the actuator assembly of the equipment isolation system. The equipment isolation system is used for isolating the nuclear power equipment.

[0017] According to an embodiment of the third aspect of the present invention, there is provided an equipment isolation method, including:

[0018] Monitoring the three-dimensional ground motion signals at the bottom of the foundation where the target equipment is located;

[0019] Calculating the target displacement data of the target equipment according to the three-dimensional ground motion signals;

[0020] The servo equipment controls the actuator assembly to drive the target equipment to perform a target displacement according to the target displacement data;

[0021] The direction of the target displacement is opposite to the moving direction of the target equipment in response to seismic waves.

[0022] Preferably, before controlling the actuator assembly to drive the target equipment to perform a target displacement according to the target displacement data,

[0023] Obtaining a seismic early warning signal issued by the earthquake monitoring network warning system of the earthquake bureau,

[0024] Powering the servo equipment according to the seismic early warning signal to start the servo equipment.

[0025] Preferably, the calculating the target displacement data of the target equipment according to the three-dimensional ground motion signals specifically includes:

[0026] Calculating the vibration response data of the target equipment according to the three-dimensional ground motion signals;

[0027] Obtaining the target displacement data of the target equipment according to the vibration response data.

[0028] In the equipment isolation system of the present invention, reverse displacement compensation is performed through servo equipment and actuator components, which can directly weaken the transmission of seismic energy, thereby forming a dynamic cancellation mechanism. For example, when a nuclear power equipment generates a displacement to the right in response to seismic waves, the servo system controls the actuator components to drive the target equipment to displace to the left (i.e., the target displacement), so that the actual absolute displacement of the nuclear power equipment is almost zero. On the one hand, the equipment body no longer needs to bear all the seismic loads, and the requirements for the structural and material strength of the equipment body can be reduced, thereby reducing the seismic resistance cost of the nuclear power equipment; on the other hand, through software parameter adjustment, this isolation system can adapt to equipment with different seismic resistance levels without the need for separate structural strengthening design of the equipment, thereby further reducing the seismic resistance cost of the nuclear power equipment. Therefore, this equipment isolation system can effectively reduce the seismic resistance cost of nuclear power equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of the equipment isolation system in some embodiments of the present invention;

[0030] Figure 2 is a schematic working flow diagram of the servo equipment in some embodiments of the present invention. In the figure: 1, sensor; 2, first computer device; 3, second computer device; 4, power supply unit; 5, servo equipment; 6, actuator components; 7, reaction wall; 8,

[0031] target equipment; 9, cable; 10, ground motion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the scope of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0034] In the description of the present invention, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, terms such as "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] It should be noted that currently, the seismic design of nuclear power equipment uses the floor response spectrum of the plant as the input and is fixed on the equipment foundation through anchor bolts embedded in the plant floor slab. To meet the seismic requirements of the equipment, this method requires increasing the strength of the equipment itself, and at the same time, sufficient equipment foundation reinforcement bars and anchor bolts need to be left to fix the equipment. This method not only results in a long manufacturing and construction cycle of the equipment and the nuclear power plant, but also leads to a significant increase in manufacturing costs and construction costs. For the nuclear island equipment with the highest seismic grade, the above disadvantages are more prominent.

[0037] On the one hand, strengthening the structures of the equipment, connectors, etc. itself will result in high manufacturing and construction costs. On the other hand, the structural strength requirements of the equipment and anchor bolts under different seismic classification divisions are different, so it is necessary to redesign and manufacture the equipment and anchor bolts for each seismic classification respectively, resulting in increased costs.

[0038] Therefore, a new seismic isolation system needs to be proposed. The equipment seismic isolation system in the present invention, by setting a servo system, applies a reverse ground motion to the equipment during an earthquake to reduce the vibration response of the equipment under the action of the earthquake, so as to achieve the purpose of meeting the seismic requirements of the equipment. By applying this system, there is no need to separately strengthen the designs of the structures of the equipment and anchor bolts, nor to separately customize or reduce the classification, thus significantly reducing the production cost.

[0039] Embodiment 1

[0040] Please refer to Figure 1 , the present invention discloses an equipment seismic isolation system for seismic isolation of a target equipment 8, including: a sensor 1, a first computer device 2, a servo device 5, and an actuator assembly 6.

[0041] Among them, the sensor 1 is used to monitor the three-dimensional seismic motion signals at the base bottom where the target device 8 is located. The first computer device 2 is electrically connected to the sensor 1, and the first computer device 2 is used to calculate the target displacement data of the target device 8 according to the three-dimensional seismic motion signals. The actuator assembly 6 is connected to the target device 8. The servo device 5 is connected to the actuator assembly 6, and is used to receive the target displacement data sent by the first computer device 2, and control the actuator assembly 6 to drive the target device 8 to perform a target displacement according to the target displacement data, and the direction of the target displacement is opposite to the moving direction of the target device 8 in response to the seismic wave.

[0042] It should be noted that the present equipment seismic isolation system is applicable to any equipment that needs seismic isolation, and is particularly applicable to seismic isolation of nuclear power equipment.

[0043] Figure 1 The label 10 in it represents seismic motion, that is, the fluctuations in three-dimensional directions generated by an earthquake. Figure 1 Only two fluctuation directions of the seismic motion 10 are shown in it, and the seismic motion 10 also includes a fluctuation direction perpendicular to the paper surface.

[0044] This system obtains the three-dimensional seismic motion signals at the base bottom where the target device 8 is located through the sensor 1. Specifically, as Figure 1 shown, the three-dimensional seismic motion signals include the acceleration values of seismic waves in the X-axis, Y-axis, and Z-axis directions. Among them, the X-axis direction is the left-right direction, the Y-axis direction is the front-back direction, and the Z-axis direction is the up-down direction. The servo device 5 drives the target device 8 to displace in the opposite direction according to the seismic wave accelerations in each direction, so that the absolute displacement of the nuclear power equipment under the combined action of the seismic motion and the system described in the present invention is always less than or equal to the permitted value.

[0045] The permitted value range of the absolute displacement in the horizontal direction (i.e., the X-axis and Y-axis) is ±50 mm to ±150 mm. The permitted value range of the absolute displacement in the vertical direction (i.e., the Z-axis) is ±20 mm to ±50 mm. The permitted absolute displacements of different equipment are different. Taking the pressure vessel of a reactor as an example, the permitted value in the horizontal direction is ±50 mm, and the permitted value range in the vertical direction is ±20 mm.

[0046] This system performs reverse displacement compensation through the servo device 5 and the actuator assembly 6, and can directly weaken the transmission of seismic energy, thereby forming a dynamic cancellation mechanism. On the one hand, the equipment body no longer needs to bear all the seismic loads, and the requirements for the structural and material strengths of the equipment body can be reduced, thereby reducing the seismic resistance cost of the nuclear power equipment; on the other hand, this seismic isolation system can be adapted to equipment with different seismic resistance levels by adjusting software parameters, without the need for separate structural strengthening design of the equipment, thereby further reducing the seismic resistance cost of the nuclear power equipment.

[0047] Exemplarily, when the nuclear power equipment generates combined vibrations in the horizontal and vertical directions in response to seismic waves, Sensor 1 also responds to the seismic waves simultaneously and detects the accelerations of the seismic waves in the horizontal and vertical directions. At a certain instant, in response to the force of the seismic waves, the nuclear power equipment has a tendency to move rightward, backward, and upward. Without interference, if the nuclear power equipment undergoes actual displacement, it will cause shear forces at the connection position between the nuclear power equipment body and the ground, which can easily damage the anchor bolts and further lead to displacement failure of the entire equipment. Through the actuator unit, this system applies forces to the nuclear power equipment in the leftward, forward, and downward directions, such that the actual absolute displacement of the nuclear power equipment is almost zero or within a safe allowable range. This can eliminate the need to separately design the connection structures such as the anchor bolts for each nuclear power equipment, thereby effectively reducing the seismic resistance cost of the nuclear power equipment.

[0048] In summary, the equipment seismic isolation system can effectively reduce the seismic resistance cost of the nuclear power equipment.

[0049] In some embodiments, the system further includes a second computer device 3, which is configured to obtain the earthquake early warning signal sent by the earthquake monitoring network warning system of the earthquake bureau. The time node when the earthquake early warning signal reaches the second computer device 3 is earlier than the time node when Sensor 1 monitors the three-dimensional ground motion signal. The second computer device 3 is electrically connected to the servo device 5 and is further configured to control the servo device 5 to start according to the earthquake early warning signal.

[0050] It should be noted that although earthquake disasters pose a high risk to equipment, they do not occur frequently. If the servo device 5 remains in the startup state all the time, it will waste a lot of electric energy. Therefore, in this system, the second computer device 3 is also used to monitor in real time the earthquake early warning signal sent by the earthquake monitoring network warning system of the earthquake bureau to predict the earthquake situation, and can start the servo device 5 before the seismic waves reach the location of the target device 8. Then, the servo device 5 performs reverse displacement compensation on the target device 8 to dynamically offset the seismic fluctuations. The principle is that the transmission speed of electrical signals is faster than that of seismic waves. Therefore, the time when the second computer device 3 receives the earthquake early warning signal sent by the earthquake monitoring network warning system of the earthquake bureau is earlier than the time when the seismic waves reach the location of the target device 8.

[0051] Earthquake early warning refers to quickly estimating earthquake parameters and predicting the impact of the earthquake on the surrounding areas based on the initial information of seismic waves observed by seismic stations near the earthquake epicenter, and using the law that the propagation speed of electromagnetic waves is much greater than that of seismic waves and the propagation speed of the initial P wave of an earthquake is greater than that of subsequent destructive seismic waves (S waves and surface waves). Before the destructive seismic waves reach the areas surrounding the epicenter, earthquake early warning information such as the ground motion intensity and arrival time is issued.

[0052] The computer b of this system is connected to the earthquake network warning system, and can receive earthquake-related information in the first time and start the whole system. This is a basis for the rapid response of this system. In other words, this system can achieve rapid response relying on the second computer device 3 connected to the earthquake network warning system of the Seismological Bureau.

[0053] Furthermore, the system also includes a power supply unit 4. The second computer device 3 is electrically connected to the servo device 5 through the power supply unit 4. When the second computer device 3 receives an earthquake warning signal, it controls the power supply unit 4 to supply power to the servo device 5 to start the servo device 5.

[0054] In this embodiment, by receiving the earthquake network warning system through the second computer device 3, the earthquake wave warning can be realized, and the servo device 5 can be started several seconds to dozens of seconds in advance. While effectively reducing the power consumption generated by the standby of the servo device 5, the shock isolation protection of the device is realized.

[0055] Specifically, the power supply unit 4 cooperates with the second computer device 3 to control the power on / off of the servo device 5. Under normal conditions, the servo device 5 is powered off and is only activated during earthquake warnings, reducing the standby energy consumption of the system. On the other hand, in the event of an earthquake disaster, the power grid equipment may be powered off. By setting up a power supply device independent of the power grid, it is beneficial to ensure the stable and continuous operation of this shock isolation system.

[0056] In some embodiments, the first computer device 2 includes a calculation unit and a processing unit. The calculation unit is electrically connected to the sensor 1 and is used to calculate the vibration response data of the target device 8 according to the three-dimensional ground motion signal. The processing unit is electrically connected to the calculation unit and is used to obtain the target displacement data of the target device 8 according to the vibration response data.

[0057] The calculation unit is used to perform vibration response analysis according to the three-dimensional ground motion signal. Specifically, the calculation unit can be implemented using existing finite element simulation software, such as: ANSYS, or other software that can calculate earthquake response spectra. The calculated vibration response data includes target displacement data, etc. The processing unit is a screening module and can be implemented using the output module in ANSYS software, and is used to screen out the target displacement data from the calculated vibration response data.

[0058] In this embodiment, the calculation unit in the first computer device 2 can realize that the sensor 1 transmits the signal and the finite element calculation and data processing are carried out at the same time, which can further improve the response speed of the system. Usually, when the computer performs finite element calculation, a complete load input is required. If according to the conventional method, the calculation can only be performed after the complete seismic wave information is collected, that is, the calculation can only be performed after the earthquake ends, based on this, the system will lose its meaning. Therefore, it is necessary to carry out signal transmission and computer calculation simultaneously. According to the restart analysis of the finite element software ANSYS, this function, that is, the rapid response of the system, can be realized.

[0059] Of course, the computing speed of a computer is heavily dependent on the computer hardware. The computing speed usually refers to the speed at which a computer executes an algorithm or processes data, that is, the efficiency of its tasks such as numerical calculations, data processing, and program execution. The computing speed usually involves the performance of the hardware, such as the speed of the processor, the speed of the memory, and the hard disk access speed. The first computer device 2 in this system needs to be configured with the best hardware on the market and updated in a timely manner according to the development of computer technology to ensure the powerful computing power of this system.

[0060] For example, the CPU (processor) may be a processor such as Ryzen 9-9950X3D produced by AMD, Core Ultra 9-285K produced by Intel, etc. The memory may be a memory such as FURY Renegade DDR5 produced by Kingston, etc. The hard disk may be a hard disk such as Ti Pro 9000 produced by Yangtze Memory, etc.

[0061] Specifically, the three-dimensional seismic motion signal includes: the acceleration value of the seismic wave in the first direction, the acceleration value of the seismic wave in the second direction, and the acceleration value of the seismic wave in the third direction. The first direction (X-axis direction, left and right direction), the second direction (Y-axis direction, front and back direction) and the third direction (Z-axis direction, vertical direction) are perpendicular to each other.

[0062] The vibration response data includes: a first response displacement value, a second response displacement value and a third response displacement value. The first response displacement value is the movement value of the target device 8 in the first direction in response to the seismic wave, the second response displacement value is the movement value of the target device 8 in the second direction in response to the seismic wave, and the third response displacement value is the movement value of the target device 8 in the third direction in response to the seismic wave.

[0063] The target displacement data includes: a first target displacement value, a second target displacement value and a third target displacement value. The first target displacement value is equal to the first response displacement value and has an opposite direction. The second target displacement value is equal to the second response displacement value and has an opposite direction. The third target displacement value is equal to the third response displacement value and has an opposite direction.

[0064] In this embodiment, by obtaining the acceleration values in three-dimensional directions, the target displacement values in each direction can be accurately calculated, so as to realize independent compensation in each direction and avoid coupling errors.

[0065] In some embodiments, the actuator assembly 6 includes a first actuator unit, a second actuator unit, and a third actuator unit. The servo device 5 is respectively connected to the first actuator unit, the second actuator unit, and the third actuator unit. The first actuator unit is arranged along a first direction, the second actuator unit is arranged along a second direction, and the third actuator unit is arranged along a third direction. The first actuator unit, the second actuator unit, and the third actuator unit are all connected to the target device 8. The servo device 5 is configured to control the first actuator unit to drive the target device 8 to move along the first direction according to a first target displacement value, and to control the second actuator unit to drive the target device 8 to move along the second direction according to a second target displacement value, and to control the third actuator unit to drive the target device 8 to move along the third direction according to a third target displacement value.

[0066] In this embodiment, by dividing the actuator assembly 6 into three independent units, the three independent units respectively correspond to three orthogonal directions (i.e., the X-axis, Y-axis, and Z-axis directions), so that independent displacement compensation in three directions can be realized, thereby maximizing the seismic isolation effect.

[0067] In addition, in order to decouple the first actuator unit, the second actuator unit, and the third actuator unit, the system is further provided with a first spherical hinge, a second spherical hinge, and a third spherical hinge. Among them, the first actuator unit is connected to the target device 8 through the first spherical hinge; the second actuator unit is connected to the target device 8 through the second spherical hinge; the third actuator unit is connected to the target device 8 through the third spherical hinge.

[0068] When the first actuator unit drives the target device 8 to move along the first direction, the second spherical hinge and the third spherical hinge can provide a margin for the target device 8 to move along the first direction to avoid damage to the connection structure between the second actuator unit and the third actuator unit and the target device 8. Similarly, when the second actuator unit drives the target device 8 to move along the second direction, the first spherical hinge and the third spherical hinge can provide a margin for the target device 8 to move along the second direction; when the third actuator unit drives the target device 8 to move along the third direction, the first spherical hinge and the first spherical hinge can provide a margin for the target device 8 to move along the third direction.

[0069] Further, the first actuating unit includes a first piston rod and a first main body. The first main body is disposed opposite to the target device 8 in a first direction. One end of the first piston rod is slidably connected to the first main body, and the other end (through a first spherical hinge) is connected to the target device 8. The first piston rod is capable of moving in the first direction. The second actuating unit includes a second piston rod and a second main body. The second main body is disposed opposite to the target device 8 in a second direction. One end of the second piston rod is slidably connected to the second main body, and the other end (through a second spherical hinge) is connected to the target device 8. The second piston rod is capable of moving in the second direction. The third actuating unit includes a third piston rod and a third main body. The third main body is disposed opposite to the target device 8 in a third direction. One end of the third piston rod is slidably connected to the third main body, and the other end (through a third spherical hinge) is connected to the target device 8. The third piston rod is capable of moving in the third direction.

[0070] Specifically, by adopting the linear motion of the piston, the target displacement of the target device 8 can be directly and quickly completed. Moreover, the linear motion structure of the piston rod is simple, and multiple displacement adjustments can be completed, and mechanical failures are not likely to occur.

[0071] Preferably, the first actuating unit, the second actuating unit, and the third actuating unit are all hydraulic actuators. The advantages of hydraulic actuators are as follows: the thrust is relatively large, usually capable of providing a thrust of 10 - 50 MPa, which is suitable for vibration isolation of large-weight equipment. Nuclear power equipment is usually large-weight equipment. Therefore, hydraulic actuators are applicable to driving nuclear power equipment for target displacement.

[0072] Of course, the first actuating unit, the second actuating unit, and the third actuating unit can also adopt devices such as electric cylinders as actuators.

[0073] Even further, as Figure 2 shown, when a hydraulic actuator is adopted, the servo device 5 includes: a servo valve and an oil pump. The servo valve is connected to the oil pump, and the oil pump is respectively communicated with the hydraulic chambers of the first actuating unit, the second actuating unit, and the third actuating unit. The servo valve is used to control the oil pump to respectively fill / extract hydraulic oil into / from the hydraulic chambers of the first actuating unit, the second actuating unit, and the third actuating unit according to the target displacement data, thereby respectively driving the first piston rod, the second piston rod, and the third piston rod to move, so as to drive the target device 8 to move.

[0074] Through the cooperation of the servo valve and the oil pump, precise displacement of the hydraulic actuator can be achieved, and further, the displacement of the target device 8 can be controlled more accurately.

[0075] In some embodiments, the system further includes: a reaction wall 7, which includes a first reaction surface, a second reaction surface, and a third reaction surface. The first reaction surface lies in the plane determined by the second direction and the third direction, the second reaction surface lies in the plane determined by the first direction and the third direction, and the third reaction surface lies in the plane determined by the first direction and the second direction. The first main body, the second main body, and the third main body are respectively installed on the first reaction surface, the second reaction surface, and the third reaction surface.

[0076] By setting up a servo system, the system applies reverse seismic motion to the equipment during an earthquake to reduce the vibration response of the equipment under the action of the earthquake, achieving the purpose of meeting the seismic resistance requirements of the equipment.

[0077] To achieve the above objectives, this embodiment proposes an intelligent three-dimensional seismic isolation (vibration isolation) system for nuclear power equipment, including: a sensor 1, a storage battery, a computer a (i.e., the first computer device 2), a computer b (i.e., the second computer device 3), a reaction device (i.e., the reaction wall 7), a servo system (i.e., the servo device 5), an actuator (i.e., the actuator assembly 6), and a cable 9. According to the time sequence, the working principle of the intelligent three-dimensional seismic isolation (vibration isolation) system proposed by the present invention is as follows:

[0078] One end of computer b is connected to the storage battery, and the other end is connected to the earthquake warning system of the earthquake bureau seismic network. The other side of the storage battery is then connected to the servo system. When computer b receives the warning information from the seismic network, the built-in program of computer b immediately activates the storage battery to supply power to the servo system.

[0079] Further, the sensor 1 is buried in the foundation or installed at the bottom of the foundation and marked with its position, including the horizontal and vertical positions relative to the structure. One end of it is connected to computer a. The sensor 1 is used to monitor and record the three-dimensional seismic motion signals at its location and transmit the signals to computer a.

[0080] Further, computer a is respectively connected to sensor 1 and the servo system. The finite element calculation model and data processing system of the building (structure) are stored inside computer a. After sensor 1 transmits the seismic signal to computer a, computer a immediately starts to work, calculates the seismic vibration response of the floor where the nuclear power equipment is located, and after processing the vibration response value by the data processing system, transmits it to the servo system connected to it.

[0081] Further, the servo system is also connected to an actuator. The actuator is arranged in both horizontal directions and the vertical direction. Under the power supply of the storage battery and the signal input of computer a, the servo system drives the actuator to start working. The movable end of the actuator is connected to the nuclear power equipment, and the fixed end is connected to the reaction device. The reaction device is rigidly connected to the floor slab of the building (structure).

[0082] Under the combined action of ground motion and actuators, the displacements input to nuclear power equipment can cancel each other out, achieving the purpose of protecting the equipment.

[0083] Compared with existing earthquake-resistant means, the advantages of the present invention are as follows:

[0084] 1. The present invention adopts an intelligent isolation (vibration isolation) system as the isolation measure for nuclear power equipment, abandoning the previous earthquake-resistant design concept. This system has three-dimensional isolation performance. While providing horizontal isolation, it can provide good vertical isolation performance in the vertical direction. Under the action of an earthquake, the system described in the present invention can provide a displacement input opposite to the earthquake response for nuclear power equipment, so that the absolute displacement of nuclear power equipment is always zero or other acceptable values determined according to the safety level of the equipment during the earthquake active period, ensuring the safety of the equipment and the nuclear power plant.

[0085] 2. This system is controlled by a computer, avoiding problems such as the non-adjustable stiffness of the isolation bearings in the traditional isolation scheme, the inability of the bearings to withstand tension, and the unsatisfactory isolation effect. At the same time, the use of a computer can save a large amount of manpower and material resources, and can record and transmit earthquake information more accurately, ensuring that the intelligent equipment isolation system provides protection for nuclear power equipment in a timely and accurate manner.

[0086] 3. The present invention improves the construction process. In the intelligent isolation (vibration isolation) system described in the present invention, nuclear power equipment does not need to use equipment foundations and anchor bolts. Only an appropriate number of actuators need to be installed at the equipment installation location, and corresponding supporting facilities need to be arranged. Given the fact that there are many nuclear power equipment, there is a huge room for improvement in the construction process and a relatively large adjustment space for the construction period in formwork engineering, steel bar engineering, and concrete pouring engineering.

[0087] 4. The present invention optimizes the manufacturing process of nuclear power equipment. During an earthquake, under the action of the intelligent isolation (vibration isolation) system described in the present invention, the earthquake energy is weakened, and the nuclear power equipment will not generate vibrations exceeding the allowable value, and its safety performance will not be affected by the earthquake. Therefore, in the manufacturing process of nuclear power equipment, the manufacturing process can be appropriately optimized, which can not only save manufacturing costs but also optimize the manufacturing cycle.

[0088] Example 2

[0089] In this embodiment, taking nuclear power equipment as an example, the overall working process of the equipment isolation system in Example 1 is described:

[0090] As Figure 1 shown, the second computer device 3 is connected to the earthquake warning system of the earthquake monitoring network of the Seismological Bureau in real time through a fiber optic network. When the earthquake monitoring network detects seismic waves, it sends an earthquake warning signal to the second computer device 3 10 - 60 seconds before the seismic waves reach the location of the nuclear power equipment. The warning signal can include the magnitude, epicenter location, and expected arrival time, etc.

[0091] When the second computer device 3 receives an earthquake early warning signal, the emergency response program built into the second computer device is activated, and the power supply unit 4 is immediately activated. The power supply unit 4 uses a storage battery. Specifically, the storage battery can be a lithium iron phosphate battery pack (capacity ≥ 100 kWh), with an output voltage of 380 V, and provides emergency power to the servo system through a cable 9.

[0092] When the seismic wave reaches the location of the nuclear power equipment, the sensor 1 buried in the installation foundation of the nuclear power equipment collects seismic motion signals in three directions of X, Y, and Z in real time. The sensor 1 can be a three-axis acceleration sensor 1. The three-axis acceleration sensor 1 is connected to the first computer device 2 through a shielded cable 9, so as to transmit digital signals (i.e., target displacement data) to the first computer device 2. The signal transmission can adopt the CAN bus protocol to ensure a lower transmission delay, thereby improving the real-time control of the first computer device 2.

[0093] The ANSYS software is installed in the first computer device 2, and a three-dimensional finite element model of the nuclear power equipment to be protected is built in. When receiving the target displacement data sent by the three-axis acceleration sensor 1, the calculation unit of the first computer device 2 (for example, a GPU module with the model number NVID IA Tes l a V100) obtains the displacement response (i.e., vibration response data) of the nuclear power equipment in each degree of freedom by solving the dynamic equation in real time.

[0094] The processing unit in the first computer device 2 can be a software module installed on the hard disk. The processing unit adopts the PID closed-loop control algorithm, generates control instructions (i.e., target displacement data) by reading the displacement response (i.e., vibration response data) of the nuclear power equipment in each degree of freedom output by the calculation unit, and transmits the control instructions to the servo device 5 through a cable or optical fiber.

[0095] As Figure 2 shown, the servo device 5 includes a signal modulator, a servo controller, a servo valve, and an oil pump. Among them, the servo valve can adopt a servo valve of the MOOG G631 series (flow rate 200 L / min, pressure 31.5 MPa). Specifically, the servo valve is provided with a liquid inlet, a first liquid outlet, and a second liquid outlet. The liquid inlet of the servo valve is communicated with the oil pump, and the oil pump can adopt an axial piston pump. The first liquid outlet is communicated with the first cavity of the actuator, and the second liquid outlet is communicated with the second cavity of the actuator. When the pressure oil enters the first cavity, it can drive the piston rod of the actuator to extend; when the pressure oil enters the second cavity, it can drive the piston rod of the actuator to retract.

[0096] The signal modulator is used to convert digital instructions into analog signals. The servo controller is electrically connected to the signal modulator and is used to control the movement of the spool of the servo valve according to the analog signal, thereby adjusting the opening degrees of the first liquid outlet and the second liquid outlet. For example, the servo controller controls the communication between the liquid inlet of the servo valve and the first liquid outlet, and the pressure oil provided by the oil pump enters the first cavity of the actuator through the valve cavity of the servo valve, and the pressure oil drives the piston rod of the actuator to extend.

[0097] There are three hydraulic actuators, namely the first actuating unit (X-axis direction), the second actuating unit (Y-axis direction) and the third actuating unit (Z-axis direction). The piston rod ends of the three hydraulic actuators are all connected to the nuclear power equipment through spherical hinges. The cylinder body ends of the hydraulic actuators are installed on the reaction wall.

[0098] When the X-direction seismic displacement reaches +10 mm, the servo system drives the nuclear power equipment through the X-direction actuator to generate a displacement of -10 mm. Finally, the resultant displacement of the nuclear power equipment is always controlled within the safety threshold.

[0099] Embodiment 3

[0100] The present invention also discloses a nuclear power equipment plant building, including: nuclear power equipment, a plant floor slab and the equipment seismic isolation system in Embodiment 1. The equipment seismic isolation system is installed on the plant floor slab, and the nuclear power equipment is connected to the actuator assembly 6 of the equipment seismic isolation system. The equipment seismic isolation system is used to isolate the nuclear power equipment from seismic vibrations.

[0101] Please refer to Figure 1 , a certain nuclear power equipment is located on a certain floor slab of a building (structure). The equipment seismic isolation system in Embodiment 1, that is, the intelligent three-dimensional seismic isolation (vibration) system for nuclear power equipment, includes a sensor 1, which is used to monitor and record the three-dimensional seismic motion signals at its location and transmit the signals to a computer a (i.e., the first computer device 2) through a cable 9. At the same time, when the computer b (i.e., the second computer device 3) connected to the earthquake warning system of the earthquake bureau receives an earthquake warning message, it responds quickly and transmits a start signal to a storage battery (i.e., the power supply unit 4), and the storage battery starts to supply power to the servo system.

[0102] Computer a internally stores a finite element model of a building and a data processing system. After receiving a seismic signal, computer a quickly inputs it to the internally stored finite element model of the building and starts calculating the seismic vibration response of nuclear power equipment. After the calculation results are processed by the data processing system, they are transmitted to the servo system. The function of the data processing system built into computer a is to obtain the displacement data input by the servo system into the actuator based on the numerical value of the seismic vibration response of the nuclear power equipment calculated by the finite element model, and ensure that under the simultaneous action of seismic motion and the actuator, the absolute displacement of the nuclear power equipment is zero or other acceptable values determined according to the safety level of the equipment. It should be noted that except for the signal transmission time difference, the signal transmission by sensor 1 and the finite element calculation and data processing by computer a are carried out simultaneously, that is, computer a starts working immediately after receiving the signal input, rather than waiting for sensor 1 to transmit all the seismic motion signals before working. This depends on the rapid response of the system described in the present invention and the powerful computing power of the computer.

[0103] After receiving the signal transmitted by the servo system, the actuator starts working. Among them, the side of the actuator connected to the nuclear power equipment can be stretched or compressed along the actuator direction, and the connection between the actuator and the floor slab or the reaction device is set as a rigid connection and cannot be deformed. The reaction device can be regarded as a low wall, and its steel bars need to be reliably tied to the steel bars of the floor slab to form an effective connection. At the same time, the reaction device needs to be equipped with enough steel bars to ensure its sufficient stiffness.

[0104] Under the combined action of seismic motion and the actuator, the absolute displacement of the nuclear power equipment can always remain zero or other acceptable values determined according to the safety level of the equipment.

[0105] From the above description, it can be seen that based on the powerful computing power of the present invention, during an earthquake, by providing an additional displacement response to the nuclear power equipment, the absolute displacement of the nuclear power equipment under the combined action of seismic motion and the system described in the present invention is always zero or other acceptable values determined according to the safety level of the equipment. After using the isolation (vibration isolation) system described in the present invention, on the premise of unchanged seismic resistance requirements, the strength requirements of the nuclear power equipment itself can be appropriately reduced, the number of equipment foundations and anchor bolts can be reduced, the manufacturing cost and construction cost can be reduced, and the equipment manufacturing and nuclear power plant construction cycle can be shortened.

[0106] It should be noted that the quantity and arrangement of each component described in the present invention can be adjusted according to the actual quantity of equipment and the seismic resistance level of the equipment.

[0107] Embodiment 4

[0108] The present invention also discloses an equipment isolation method, which is applied to the equipment isolation system in Embodiment 1. The method includes:

[0109] Monitoring the three-dimensional seismic motion signal at the bottom of the foundation where the target equipment 8 is located;

[0110] Calculate the target displacement data of the target device 8 based on the three-dimensional ground motion signal;

[0111] The servo device 5 controls the actuator assembly 6 to drive the target device 8 to perform the target displacement according to the target displacement data;

[0112] The direction of the target displacement is opposite to the moving direction of the target device 8 in response to the seismic wave.

[0113] In this embodiment, before controlling the actuator assembly 6 to drive the target device 8 to perform the target displacement according to the target displacement data,

[0114] Obtain the earthquake early warning signal issued by the earthquake monitoring network early warning system of the earthquake bureau,

[0115] According to the earthquake early warning signal, supply power to the servo device 5 to start the servo device 5.

[0116] Furthermore, calculating the target displacement data of the target device 8 based on the three-dimensional ground motion signal specifically includes:

[0117] Calculate the vibration response data of the target device 8 according to the three-dimensional ground motion signal;

[0118] Obtain the target displacement data of the target device 8 according to the vibration response data.

[0119] Furthermore, the three-dimensional ground motion signal includes: the acceleration value of the seismic wave in the first direction, the acceleration value of the seismic wave in the second direction, and the acceleration value of the seismic wave in the third direction. The vibration response data includes: the first response displacement value, the second response displacement value, and the third response displacement value. The first response displacement value is the moving value of the target device 8 in the first direction in response to the seismic wave. The second response displacement value is the moving value of the target device 8 in the second direction in response to the seismic wave. The third response displacement value is the moving value of the target device 8 in the third direction in response to the seismic wave. The target displacement data includes: the first target displacement value, the second target displacement value, and the third target displacement value. The numerical value of the first target displacement value is equal to and the direction is opposite to that of the first response displacement value. The numerical value of the second target displacement value is equal to and the direction is opposite to that of the second response displacement value. The numerical value of the third target displacement value is equal to and the direction is opposite to that of the third response displacement value.

[0120] This method controls the actuators in three directions through a servo system, applies reverse ground motion to the equipment during an earthquake, so as to reduce the vibration response of the equipment under the action of the earthquake and achieve the purpose of meeting the seismic resistance of the equipment. By applying this method to the equipment isolation system, there is no need to separately strengthen the design of the nuclear power equipment and the structure of the anchor bolts, nor to separately customize or reduce the grading, thus greatly reducing the production cost.

[0121] It is understandable that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A device isolation system for isolating a target device, characterized in that, Comprising: A sensor (1), a first computer device (2), a servo device (5), and an actuator assembly (6); The sensor (1) is configured to monitor three-dimensional seismic motion signals at the base bottom where the target device (8) is located; The first computer device (2) is electrically connected to the sensor (1), and the first computer device (2) is configured to calculate target displacement data of the target device (8) based on the three-dimensional seismic motion signals; The actuator assembly (6) is connected to the target device (8); The servo device (5) is connected to the actuator assembly (6), and is configured to receive the target displacement data sent by the first computer device (2), and control the actuator assembly (6) to drive the target device (8) to perform a target displacement according to the target displacement data, and the direction of the target displacement is opposite to the moving direction of the target device (8) in response to seismic waves.

2. The equipment isolation system according to claim 1, wherein It further comprises a second computer device (3), and the second computer device (3) is configured to obtain a seismic early warning signal sent by a seismic bureau network early warning system, and the time node when the seismic early warning signal reaches the second computer device (3) is earlier than the time node when the sensor (1) monitors the three-dimensional seismic motion signals; The second computer device (3) is electrically connected to the servo device (5), and is further configured to control the servo device (5) to start according to the seismic early warning signal.

3. The equipment isolation system according to claim 2, wherein It further comprises a power supply unit (4), and the second computer device (3) is electrically connected to the servo device (5) through the power supply unit (4), The second computer device (3), when receiving the seismic early warning signal, controls the power supply unit (4) to supply power to the servo device (5) to start the servo device (5).

4. The equipment isolation system according to claim 1, characterized in that The first computer device (2) includes a calculation unit and a processing unit. The calculation unit is electrically connected to the sensor (1) and is configured to calculate vibration response data of the target device (8) based on the three-dimensional seismic motion signals; The processing unit is electrically connected to the calculation unit and is configured to obtain the target displacement data of the target device (8) based on the vibration response data.

5. The equipment isolation system according to claim 4, wherein, The three-dimensional seismic motion signals include: the acceleration value of the seismic wave in the first direction, the acceleration value of the seismic wave in the second direction, and the acceleration value of the seismic wave in the third direction, The first direction, the second direction, and the third direction are perpendicular to each other; The vibration response data includes: a first response displacement value, a second response displacement value, and a third response displacement value. The first response displacement value is the moving value of the target device (8) in the first direction in response to the seismic wave, the second response displacement value is the moving value of the target device (8) in the second direction in response to the seismic wave, and the third response displacement value is the moving value of the target device (8) in the third direction in response to the seismic wave; The target displacement data includes: a first target displacement value, a second target displacement value, and a third target displacement value. The numerical value of the first target displacement value is equal to and in the opposite direction of the first response displacement value. The numerical value of the second target displacement value is equal to and in the opposite direction of the second response displacement value. The numerical value of the third target displacement value is equal to and in the opposite direction of the third response displacement value.

6. The equipment isolation system according to claim 5, characterized in that, The actuator assembly (6) includes a first actuator unit, a second actuator unit, and a third actuator unit. The servo device (5) is respectively connected to the first actuator unit, the second actuator unit, and the third actuator unit. The first actuator unit is arranged along a first direction. The second actuator unit is arranged along a second direction. The third actuator unit is arranged along a third direction. The first actuator unit, the second actuator unit, and the third actuator unit are all connected to the target device (8). The servo device (5) is configured to control the first actuator unit to drive the target device (8) to move along the first direction according to the first target displacement value, and to control the second actuator unit to drive the target device (8) to move along the second direction according to the second target displacement value, and to control the third actuator unit to drive the target device (8) to move along the third direction according to the third target displacement value.

7. The equipment isolation system according to claim 6, wherein The first actuator unit includes a first piston rod and a first main body portion. The first main body portion is disposed opposite to the target device (8) along the first direction. One end of the first piston rod is slidably connected to the first main body portion, and the other end is connected to the target device (8). The first piston rod is capable of moving along the first direction. The second actuator unit includes a second piston rod and a second main body portion. The second main body portion is disposed opposite to the target device (8) along the second direction. One end of the second piston rod is slidably connected to the second main body portion, and the other end is connected to the target device (8). The second piston rod is capable of moving along the second direction. The third actuator unit includes a third piston rod and a third main body portion. The third main body portion is disposed opposite to the target device (8) along the third direction. One end of the third piston rod is slidably connected to the third main body portion, and the other end is connected to the target device (8). The third piston rod is capable of moving along the third direction.

8. The equipment isolation system according to claim 7, characterized in that, The first actuator unit, the second actuator unit, and the third actuator unit are all hydraulic actuators.

9. The equipment isolation system according to claim 8, wherein The servo device (5) includes: a servo valve and an oil pump. The servo valve is connected to the oil pump. The oil pump is respectively communicated with the hydraulic chambers of the first actuator unit, the second actuator unit, and the third actuator unit. The servo valve is configured to control the oil pump to fill / extract hydraulic oil into / from the hydraulic chambers of the first actuator unit, the second actuator unit, and the third actuator unit according to the target displacement data, thereby respectively driving the first piston rod, the second piston rod, and the third piston rod to move, so as to drive the target device (8) to move.

10. The equipment isolation system according to claim 7, characterized in that, Further included: Reaction wall (7), the reaction wall (7) includes a first reaction surface, a second reaction surface and a third reaction surface, the first reaction surface is on the plane determined by the second direction and the third direction, the second reaction surface is on the plane determined by the first direction and the third direction, and the third reaction surface is on the plane determined by the first direction and the second direction; The first main body, the second main body and the third main body are respectively installed on the first reaction surface, the second reaction surface and the third reaction surface.

11. A nuclear power equipment plant, characterized in that, Comprising: A nuclear power equipment, a plant floor slab and the equipment isolation system according to any one of claims 1 to 10, The equipment isolation system is installed on the plant floor slab, the nuclear power equipment is connected to the actuator assembly (6) of the equipment isolation system, and the equipment isolation system is used for isolating the nuclear power equipment.

12. A method for isolating vibration of a device, characterized in that, Comprising: Monitoring the three-dimensional ground motion signals at the bottom of the foundation where the target equipment (8) is located; Calculating the target displacement data of the target equipment (8) according to the three-dimensional ground motion signals; The servo equipment controls the actuator assembly to drive the target equipment (8) to perform the target displacement according to the target displacement data; The direction of the target displacement is opposite to the moving direction of the target equipment (8) in response to the seismic wave.

13. The method according to claim 12, wherein Before the servo equipment controls the actuator assembly to drive the target equipment (8) to perform the target displacement according to the target displacement data, Obtaining a seismic early warning signal issued by the earthquake monitoring network early warning system, Powering the servo equipment according to the seismic early warning signal to start the servo equipment.

14. The method according to claim 13, wherein The calculating the target displacement data of the target equipment (8) according to the three-dimensional ground motion signals specifically includes: Calculating the vibration response data of the target equipment (8) according to the three-dimensional ground motion signals; Obtaining the target displacement data of the target equipment (8) according to the vibration response data.

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