阅读说明：本技术 一种核反应堆倒置式驱动机构整体拆装装置 (Integral dismounting device for inversion type driving mechanism of nuclear reactor ) 是由 任荷 王炳炎 谭宏伟 安彦波 杜华 罗英 黄辉 陈书华 熊思勇 于 2020-06-19 设计创作，主要内容包括：本发明公开了一种核反应堆倒置式驱动机构整体拆装装置,包括三自由度运动平台和适配套筒,所述三自由度运动平台带动适配套筒运动,实现对适配套筒在X轴方向、Y轴方向、Z轴方向三向位置的调节,以垂直于地面的高度方向为Z轴方向；使用时,适配套筒用于支撑驱动机构的中部组件和下部组件整体结构、以及用于支撑驱动机构的上部组件；三自由度运动平台带动适配套筒在压力容器下方移动,以使适配套筒上支撑的驱动组件对准安装位置、或者使适配套筒对准待拆卸驱动组件的位置。采用本发明装置可实现驱动机构在压力容器底部精准对准、快速拆装作业。(The invention discloses an integral dismounting device of an inversion type driving mechanism of a nuclear reactor, which comprises a three-degree-of-freedom motion platform and an adaptive sleeve, wherein the three-degree-of-freedom motion platform drives the adaptive sleeve to move so as to realize the adjustment of the position of the adaptive sleeve in three directions, namely the X-axis direction, the Y-axis direction and the Z-axis direction, and the height direction vertical to the ground is taken as the Z-axis direction; when the device is used, the adaptive sleeve is used for supporting the integral structure of the middle component and the lower component of the driving mechanism and supporting the upper component of the driving mechanism; the three-degree-of-freedom motion platform drives the adaptive sleeve to move below the pressure container, so that the driving assembly supported on the adaptive sleeve is aligned to the installation position, or the adaptive sleeve is aligned to the position of the driving assembly to be disassembled. The device can realize the accurate alignment and quick disassembly and assembly operation of the driving mechanism at the bottom of the pressure container.)

1. The integral dismounting device of the inversion type driving mechanism of the nuclear reactor is characterized by comprising a three-degree-of-freedom motion platform and an adaptive sleeve (4), wherein the three-degree-of-freedom motion platform drives the adaptive sleeve (4) to move so as to realize the adjustment of the position of the adaptive sleeve in three directions, namely the X-axis direction, the Y-axis direction and the Z-axis direction, and the height direction vertical to the ground is taken as the Z-axis direction;

when in use, the adaptive sleeve (4) is used for supporting the integral structure of the middle component and the lower component of the driving mechanism and supporting the upper component of the driving mechanism; the three-degree-of-freedom motion platform drives the adaptive sleeve (4) to move below the pressure container, so that the driving assembly supported on the adaptive sleeve (4) is aligned to the installation position, or the adaptive sleeve (4) is aligned to the position of the driving assembly to be disassembled.

2. The device for integrally dismounting and mounting the inversion driving mechanism of the nuclear reactor according to claim 1, wherein the three-degree-of-freedom motion platform comprises a lifting assembly (2) and a cross sliding assembly (3), and the lifting assembly (2) drives the cross sliding assembly (3) to lift and lower along the Z-axis direction through a linear guide rail mechanism; the cross sliding assembly (3) drives the adaptive sleeve (4) to move on the horizontal plane along the X-axis direction or the Y-axis direction.

3. The device for integrally dismounting the inversion type driving mechanism of the nuclear reactor according to claim 2, wherein the lifting assembly (2) comprises a guide rail back plate (8), a lifting servo motor (9), a linear guide rail (10) and a lifting sliding table (11); linear guide (10) are installed on guide rail backplate (8), and linear guide (10) are to extending along Z, slide from top to bottom along linear rail (10) by lift servo motor (9) drive lift slip table (11), drive X axle direction, the synchronous elevating movement of Y axle direction motion through lift slip table (11).

4. A nuclear reactor inversion type driving mechanism integral dismounting device according to claim 3, characterized in that the lifting assembly (2) further comprises a braking mechanism (12) and an electromagnetic control valve (13); after the electromagnetic control valve (13) is electrified, the brake mechanism (12) is ventilated and opened, so that the lifting servo motor (9) drives the lifting sliding table (11) to lift along the linear guide rail (10); after the electromagnetic control valve (13) is powered off, the brake mechanism (12) clamps the linear guide rail (10), and the lifting sliding table (11) is locked and fixed on the linear guide rail (10).

5. The device for integrally dismounting the inversion type driving mechanism of the nuclear reactor according to claim 2, wherein the cross sliding assembly (3) comprises a sliding supporting plate (14), a cross sliding table (15) and a horizontal servo motor (17); the sliding supporting plate (14) is arranged on a sliding part of the lifting assembly (2); the cross sliding table (15) is fixed on the sliding support plate (14), and the cross sliding table (15) is used for mounting the adaptive sleeve (4); the cross sliding table (15) is driven by a horizontal servo motor (17) to move on the horizontal plane along the X-axis direction or the Y-axis direction.

6. The device for integrally dismounting and mounting the inversion type driving mechanism of the nuclear reactor according to any one of claims 1 to 5, wherein the adaptive sleeve (4) is mounted on a three-degree-of-freedom motion platform through a sleeve supporting plate (16), and the top of the adaptive sleeve (4) is of a cylindrical structure matched with the driving assembly and used for sleeving and supporting the driving assembly; the bottom of the adaptive sleeve (4) is detachably and universally rotationally connected with the sleeve supporting plate (16).

7. The device for dismounting the whole driving mechanism of the inversion type of the nuclear reactor as claimed in claim 1, wherein the adapter sleeve (4) comprises an adapter sleeve A (18) and an adapter sleeve B (19), the adapter sleeve A (18) is used for being in adaptive connection with an A type driving mechanism, and the adapter sleeve B (19) is used for being in adaptive connection with a B type driving mechanism.

8. The device for integrally dismounting and mounting the inverted driving mechanism of the nuclear reactor according to claim 1, characterized by further comprising a transfer vehicle body (1), wherein the three-degree-of-freedom motion platform is mounted on the transfer vehicle body (1); the transfer car body (1) bottom is installed universal wheel (5) and movable support (6), universal wheel (5) are used for ensuring to transfer car body (1) each side walking, movable support (6) are used for maintaining and transfer frame (1) steady state location.

Technical Field

The invention relates to the technical field of nuclear reactors, in particular to an integral dismounting device for an inverted driving mechanism of a nuclear reactor.

Background

The reactor control rod assembly driving mechanism (driving mechanism for short) is an actuating mechanism of a reactor control system and a protection system, and drives the control rod assembly to move up and down in a reactor core through the actuating mechanism so as to realize the control of the reactor reactivity, thereby completing the startup, power regulation, power maintenance, normal shutdown and safe shutdown of the reactor. When the reactor is initially loaded, maintained and retired, the driving mechanism needs to be disassembled and assembled.

The invention relates to a nuclear reactor, a plurality of driving mechanisms are arranged at the bottom layer of a pressure vessel, and the nuclear reactor comprises two types of driving mechanisms: the A-type driving mechanism comprises an upper layer A-type driving mechanism and a lower layer A-type driving mechanism, the structure of the driving mechanism is divided into an upper component, a middle component and a lower component, the structural schematic diagram is shown in figure 1, the upper layer A-type driving mechanism and the lower layer A-type driving mechanism are identical in structure and different in length, and the B-type driving mechanism and the A-type driving mechanism are completely different in structure and identical in length to the lower layer A-type driving mechanism. When the driving mechanism is installed, the upper assembly is installed at the bottom of the pressure container, and after the middle assembly and the lower assembly are assembled, the whole upper assembly is connected with the lower assembly. When the driving mechanism is disassembled, the middle assembly and the upper assembly are separated, and the middle assembly and the lower assembly are integrally disassembled.

The disassembly and assembly of the inversion type driving mechanism of the nuclear reactor have the following characteristics:

1) the driving mechanism is a reactor important nuclear-grade device, is arranged at the bottom of the pressure vessel in an inverted mode, and is limited in dismounting space and high in operation difficulty;

2) the bottom of the pressure container has certain radioactivity, so that the disassembly and assembly process has higher efficiency, and the irradiation dose of personnel is reduced as much as possible;

3) the driving mechanism is divided into two different types, and the structural sizes are completely different, so that corresponding interface components need to be equipped during assembly and disassembly;

4) the distance between adjacent driving mechanisms is small, and the centering precision is high during assembly and disassembly, so that the adjacent driving mechanisms are prevented from being scratched;

5) the lifting stroke of the dismounting process is longer, and the load is heavier.

In order to solve the above problems, it is necessary to design an integral dismounting device of an inverted driving mechanism. Currently, no research contents related to the integral assembly and disassembly of the inversion type driving mechanism of the nuclear reactor are published. The existing research at present at home and abroad mainly aims at the disassembly and assembly of a driving mechanism on a pile top, such as the patent CN 103295653A: mounting system for a drive mechanism of a pressurized water reactor, US20180102193a 1: INSTALLATION STRUCTURE FOR INSTALLING CONTROL ROD DRIVEMECHANISM AND CABLE SEALING UNIT IN NUCLEAR REACTOR PRESSURE VESSEL, US 2005084057-A1: head assembly for nuclear reactor pressure vessel, has vessel assembly Head, differential support platform, array of control rod drive mechanism, lower shadow, internal products, upper plenum, mismatch Head assembly, failure vessels, and lift vessels, all of which describe the installation/removal method and apparatus of the pressurized water reactor drive mechanism. However, none of the above documents is directed to the overall disassembly and assembly of an inverted drive mechanism, which is completely different from the device described in the present patent application.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the invention provides an integral dismounting device of an inversion type driving mechanism of a nuclear reactor, which solves the problems that the existing inversion type driving mechanism of the nuclear reactor is complex in dismounting and mounting operation processes.

The invention is realized by the following technical scheme:

the integral dismounting device of the inversion type driving mechanism of the nuclear reactor comprises a three-degree-of-freedom motion platform and an adaptive sleeve, wherein the three-degree-of-freedom motion platform drives the adaptive sleeve to move so as to realize the adjustment of the three-way position of the adaptive sleeve in the X-axis direction, the Y-axis direction and the Z-axis direction, and the height direction perpendicular to the ground is taken as the Z-axis direction; when the device is used, the adaptive sleeve is used for supporting the integral structure of the middle component and the lower component of the driving mechanism and supporting the upper component of the driving mechanism; the three-degree-of-freedom motion platform drives the adaptive sleeve to move below the pressure container, so that the driving assembly supported on the adaptive sleeve is aligned to the installation position, or the adaptive sleeve is aligned to the position of the driving assembly to be disassembled.

The integral dismounting device of the inverted driving mechanism provided by the invention is used as special equipment for integrally mounting and dismounting the driving mechanism during initial reactor loading, overhauling and retirement. When the driving mechanism is installed, firstly, the upper assembly installed on the adapting sleeve is installed to the bottom of the pressure container by adjusting the three-degree-of-freedom motion platform, and then the middle assembly and the lower assembly are assembled and then connected with the upper assembly in an integral structure. When the driving mechanism is disassembled, the middle assembly and the upper assembly are separated, and the middle assembly and the lower assembly are integrally disassembled. The invention adopts a three-degree-of-freedom motion platform to adjust the position of the adaptive sleeve, and ensures that the driving mechanism component to be assembled and disassembled (namely the middle component and the lower component are connected with the whole structure) is accurately centered with the upper component;

the invention realizes the integral installation and disassembly of the inverted driving mechanism at the bottom of the pressure container, has simple process, reliable and safe operation and reduces the working time of working personnel in the environment with higher radiation dose.

In addition, the three-degree-of-freedom motion platform can directly drive the adaptive sleeve 4 to linearly move in three directions along the X-axis direction, the Y-axis direction and the Z-axis direction, or adopt a combination of other motion modes, as long as the position of the adaptive sleeve 4 in the three directions of the X-axis direction, the Y-axis direction and the Z-axis direction can be adjusted. Specifically, the three-degree-of-freedom motion platform comprises a screw rod driving mechanism, a linear guide rail mechanism and a cylinder driving motion mechanism.

Furthermore, the three-degree-of-freedom motion platform comprises a lifting assembly and a cross sliding assembly, wherein the lifting assembly drives the cross sliding assembly to lift along the Z-axis direction through a linear guide rail mechanism; the cross sliding assembly drives the adaptive sleeve to move on the horizontal plane along the X-axis direction or the Y-axis direction.

Preferably, a double-sliding-rail linear guide rail and a four-sliding-table linear guide rail can be adopted, and the driving mechanism with larger load is supported and driven to lift and has longer stroke.

Furthermore, the lifting assembly comprises a guide rail back plate, a lifting servo motor, a linear guide rail and a lifting sliding table; the linear guide rail is installed on the guide rail back plate, the linear guide rail extends along the Z direction, the lifting sliding table is driven by the lifting servo motor to slide up and down along the linear track, and the lifting sliding table drives the X-axis direction movement mechanism and the Y-axis direction movement mechanism to synchronously lift and move.

Further, the lifting assembly further comprises a braking mechanism and an electromagnetic control valve; after the electromagnetic control valve is electrified, the brake mechanism is ventilated and opened, so that the lifting servo motor drives the lifting sliding table to lift along the linear guide rail; after the electromagnetic control valve is powered off, the brake mechanism clamps the linear guide rail, and the lifting sliding table is locked and fixed on the linear guide rail.

Through installing four groups of normal close type arrestment mechanisms on linear slide rail, when the solenoid valve circular telegram, arrestment mechanism ventilates and opens, and the slip table just can move along the guide rail, and arrestment mechanism presss from both sides tight guide rail otherwise, prevents that actuating mechanism from falling because of the power failure accident, also can regard as emergency braking.

Further, the cross sliding assembly comprises a sliding supporting plate, a cross sliding table and a horizontal servo motor; the sliding supporting plate is arranged on a sliding part of the lifting assembly; the cross sliding table is fixed on the sliding support plate and is used for mounting an adaptive sleeve; the cross sliding table is driven by a horizontal servo motor to move on the horizontal plane along the X-axis direction or the Y-axis direction.

The cross sliding assembly adopts cross sliding rails and is matched with the adaptive sleeve to horizontally and rotationally center, so that accurate positioning is realized.

Furthermore, the adaptive sleeve is arranged on the three-degree-of-freedom motion platform through a sleeve supporting plate, and the top of the adaptive sleeve is of a cylindrical structure matched with the driving component and used for supporting the driving component in a sleeved mode; the bottom of the adaptive sleeve is detachably and universally rotationally connected with the sleeve supporting plate.

Further, the adapter sleeve comprises an adapter sleeve A and an adapter sleeve B, the adapter sleeve A is used for being in adaptive connection with the A-type driving mechanism, and the adapter sleeve B is used for being in adaptive connection with the B-type driving mechanism.

The three-degree-of-freedom motion platform is mounted on the transfer vehicle body; the utility model discloses a transportation vehicle body, including transportation automobile body, transportation automobile body bottom installs universal wheel and movable support, the universal wheel is used for ensuring to transport the walking of automobile body each direction, movable support is used for maintaining and transports frame stable state location.

The invention has the following advantages and beneficial effects:

1. the equipment provided by the invention is designed and used for the first time, and the integral installation and disassembly of the inverted driving mechanism from the bottom of the pressure container are realized; when the driving mechanism is installed, the upper assembly is installed at the bottom of the pressure container, and after the middle assembly and the lower assembly are assembled, the whole upper assembly is connected with the lower assembly. When the driving mechanism is disassembled, the middle assembly and the upper assembly are separated, and the middle assembly and the lower assembly are integrally disassembled.

2. The invention adopts three-degree-of-freedom position adjustment and can rotate for aligning, thereby ensuring that the driving mechanism is accurately aligned with the installation position.

3. The lifting of the driving mechanism can adopt a driving mode of double sliding rails and four sliding tables, and a normally closed braking mechanism is installed, so that the problems of large load and long stroke of the driving mechanism are solved.

4. The invention can read the moment, position and speed of the lifting process in real time through the industrial personal computer, has the overload protection function and prevents the driving mechanism from being damaged due to continuous operation when the driving mechanism is blocked. The operation of the dismounting device is controlled by operating the handheld remote controller while watching the actual position of the driving mechanism, and the operation is visual and convenient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic view of a drive mechanism; wherein, figure (a) shows the upper layer A type driving mechanism, figure (B) shows the lower layer A type driving mechanism, figure (c) shows the B type driving mechanism;

FIG. 2 is a schematic structural view of the overall dismounting device of the inverted driving mechanism of the present invention;

FIG. 3 is a schematic structural view of a transfer car body according to the present invention;

FIG. 4 is a schematic view of the lifting assembly of the present invention;

FIG. 5 is a schematic view of the horizontal sliding assembly of the present invention;

FIG. 6 is a schematic structural view of an adapter sleeve A of the present invention;

fig. 7 is a schematic structural view of an adapter sleeve B of the present invention.

Reference numbers and corresponding part names in the drawings:

1-a transfer vehicle body, 2-a lifting assembly, 3-a cross sliding assembly and 4-an adaptive sleeve; 5-universal wheel, 6-movable support; 7-a photoelectric sensor, 8-a guide rail back plate, 9-a lifting servo motor, 10-a linear guide rail, 11-a lifting sliding table, 12-a brake mechanism and 13-an electromagnetic control valve; 14-slide rail supporting plate, 15-cross sliding table, 16-sleeve supporting plate and 17-horizontal servo motor; 18-adapter sleeve a, 19-adapter sleeve B; 20-pressure vessel bottom, 21-upper module, 22-middle module, 23-lower module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.