A high-precision installation device and method for extreme attitude of reactor internal components

Abstract

This invention discloses a high-precision installation device and method for reactor internal components in extreme attitudes. The device includes an alignment hoist, an alignment and levelness monitoring mechanism, an adjustment and guiding mechanism, and a remote connection tool. The alignment hoist connects a traveling crane and the internal components, enabling the alignment and installation of the internal components with the annular components. The alignment and levelness monitoring mechanism monitors the alignment and installation status and levelness changes of the internal components in real time. The adjustment and guiding mechanism guides and fine-tunes the position of the internal components based on their alignment deviation and levelness data. The remote connection tool connects the alignment hoist and the internal components, enabling remote connection or unlocking. Advantages include: enabling installation of internal components in extreme attitudes, remote unlocking, dynamic real-time display of alignment deviation during installation, and fine-tuning of alignment status; reducing reliance on personnel's operational skills and expertise during installation; lowering installation risks; and improving installation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of high-precision installation of reactor internal components, and in particular to a high-precision installation device and method for extreme attitude of reactor internal components. Background Art

[0002] For reactor installation in specific scenarios, such as when the pressure vessel's base horizontality exceeds tolerance, resulting in extreme conditions where the components inside the reactor need to be lifted at an angle, the traditional installation method that relies on ring-shaped crane coordinate positioning cannot meet the requirements of equipment accuracy and safe lifting.

[0003] Take the installation of a reactor internals as an example (see Figure 1 ), its structure is located inside the annular component in the pressure vessel, the gap between the circumferential wall of the internal component and the annular component is only 0.5mm, the pressure vessel base is tilted, and the installation has the following problems:

[0004] 1. The ring component has a deep hole structure. The deviation between the axis of the in-pile component and the ring component can easily cause the in-pile component to get stuck or bump after falling into the deep hole of the ring component.

[0005] 2. The deep hole structure makes it impossible for construction workers to enter the annular component and unlock the lifting point after the internal components of the pile are hoisted into place.

[0006] 3. Coordinate positioning hoisting methods such as ring cranes and cranes cannot solve the difficulty of aligning the internal components of the pile with the reference axis. Real-time monitoring through auxiliary total stations, theodolites, etc. is required, which is costly and inconvenient to operate. Summary of the invention

[0007] The object of the present invention is to provide a high-precision installation device and installation method for reactor internal components at extreme postures, thereby solving the above-mentioned problems existing in the prior art.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] A high-precision installation device for reactor internal components at extreme postures, comprising a centering hanger, a centering and horizontality monitoring mechanism, and an adjustment guide mechanism;

[0010] The centering lifting device is connected to the crane and the in-pile component above and below, respectively, so as to transfer the axis and position state of the in-pile component to the centering lifting device, and the centering lifting device is driven by the crane to drive the in-pile component to move, so as to realize the centering installation of the in-pile component and the annular component;

[0011] The centering and levelness monitoring mechanism establishes reference associations with the annular component and the centering hanger respectively, so as to establish reference associations with the inner ring hole of the annular component and the internal components of the pile, so as to monitor the centering installation status and levelness changes of the internal components of the pile in real time;

[0012] The adjustment guide mechanism cooperates with the centering hanger to achieve guidance and position fine adjustment of the in-pile components according to the centering deviation and horizontality data of the in-pile components detected in real time.

[0013] Preferably, the centering hanger includes a hanger body, guide rods, coaxiality calibration holes and a positioning pin connecting structure; the hanger body in a cylindrical frame structure is evenly spaced circumferentially with a plurality of guide rods parallel to its axial direction, each guide rod corresponds to an adjustment guide mechanism, and the guide rods are used in conjunction with the adjustment guide mechanism to assist in guiding and fine-tuning the position of the in-pile components during the lifting process; at least two positioning pin connecting structures are evenly spaced circumferentially at the lower end of the hanger body, and the positioning pin connecting structures are used to achieve the connection and positioning of the hanger body and the in-pile components.

[0014] Preferably, the sling body includes a main body ring plate and a connecting beam, the two main body ring plates are coaxially arranged with an interval up and down, a plurality of connecting beams parallel to the axial direction are evenly arranged between the two main body ring plates along the circumference, and the two ends of the connecting beam are respectively fixedly connected to the two main body ring plates; a plurality of coaxiality calibration holes corresponding to each other are evenly arranged on the two main body ring plates along the circumference; the two ends of the guide rod are respectively fixedly connected to the two main body ring plates; the positioning pin connection structure is arranged on the main body ring plate located on the lower side.

[0015] Preferably, the sling body further comprises a reinforcing ring plate, and a plurality of reinforcing ring plates coaxial therewith are sequentially arranged between the two main body ring plates from top to bottom, and the outer peripheral wall of the reinforcing ring plate is fixedly connected to each of the connecting beams.

[0016] Preferably, the centering and horizontality monitoring mechanism includes a laser emitter, a laser receiving target and an inclination sensor; the upper main body ring plate is provided with at least two protrusions extending radially outward at evenly spaced intervals along its circumference, the protrusions are provided with laser receiving target positioning holes, and the laser receiving target is mounted on the upper main body ring plate through the laser receiving target positioning holes; at least two laser emitter mounting seats are evenly spaced along its circumference on the upper surface of the annular member, a laser emitter is mounted on the laser emitter mounting seats, and the laser emitter corresponds to the laser receiving target one by one in the upper and lower directions; the lower main body ring plate is provided with two inclination sensors at intervals along its circumference, and the axes of the two inclination sensors are perpendicular to each other.

[0017] Preferably, the upper surface of the pressure vessel is evenly spaced along its circumference with a plurality of adjustment guide mechanisms corresponding to the guide rods one by one; the adjustment guide mechanism comprises an adjustment mechanism, an adjustment arm and a roller, the adjustment arm is L-shaped, the horizontal section of the adjustment arm is connected to the adjustment mechanism and extends horizontally inward along the radial direction of the pressure vessel, and the adjustment mechanism drives the horizontal section of the adjustment arm to move in the horizontal direction; the vertical section of the adjustment arm is connected to the horizontal section and extends vertically downward in a direction parallel to the axis of the pressure vessel, the vertical section is retractable, the roller is arranged at the lower end of the vertical section, and the vertical section drives the roller to move in the vertical direction;

[0018] During the process of the internal components of the pile being lowered, the rollers are in contact with the internal components of the pile. When the internal components of the pile are beyond the range of the rollers, the rollers are in contact with the guide rods.

[0019] Preferably, the adjustment mechanism includes a handwheel, a lead screw, a drive block, a guide rod and a fixed frame; the fixed frame is fixed to the upper surface of the pressure vessel, one end of the lead screw is rotatably connected to the fixed frame, and the other end passes through the fixed frame and is connected to the handwheel, the lead screw is threaded with a drive block, and the drive block is connected to the adjustment arm; the rotation of the handwheel drives the lead screw to rotate, and then the drive block moves along the lead screw, thereby driving the adjustment arm to move in the horizontal direction.

[0020] Preferably, at least one guide rod is arranged at intervals on the left and / or right side of the lead screw, both ends of the guide rod are fixedly connected to the fixed frame, and corresponding guide holes are respectively arranged on the two guide rods on the driving block, and each guide rod passes through the corresponding guide hole to provide guidance for the movement of the driving block.

[0021] Preferably, the device further comprises a remote connection tool for connecting the centering hanger and the in-pile component; the remote connection tool comprises a main rod, an operating handle and a guide shaft; the main rod is arranged vertically, the operating handle is arranged vertically at the upper end of the main rod, the middle and lower part of the main rod is sleeved with a coaxial guide shaft, and the outer wall of the main rod below the guide shaft is provided with an external thread;

[0022] The upper and lower ends of the centering sling are provided with corresponding connecting through holes along the circumference thereof, the outer circumference of the connecting through hole provided at the lower end of the centering sling is provided with a shaft sleeve coaxial therewith, and the upper end of the internal component is provided with a plurality of threaded connecting holes corresponding to the connecting through holes at intervals along the circumference thereof, and the threaded connecting holes are provided with internal threads;

[0023] The lower end of the main rod passes through the connecting through holes on the upper and lower ends of the centering hanger in turn and then extends into the threaded connecting hole on the internal component of the pile. The guide shaft correspondingly extends into the shaft sleeve. The operating rod is rotated to make the internal thread engage with the external thread, so that the centering hanger is connected to the internal component of the pile up and down.

[0024] The object of the present invention is to provide a method for high-precision installation of reactor internal components in extreme posture, comprising the following steps:

[0025] S1. Place the centering spreader on a horizontal operating platform, install the laser receiving target and the laser transmitter at the coaxiality calibration holes of the upper and lower main body ring plates of the centering spreader respectively, obtain the coaxiality deviation between the upper and lower main body ring plates through the measurement data of the laser receiving target and the laser transmitter, and record it as the initial deviation value; remove the corresponding laser receiving target and laser transmitter from the coaxiality calibration hole;

[0026] S2, installing the laser transmitter at the corresponding position of the annular component;

[0027] S3, fixing the centering hanger to the internal components of the pile via the positioning pin connection structure and the remote connection tool;

[0028] S4. Install laser receiving targets and inclination sensors at corresponding positions on the centering spreader;

[0029] S5, connecting the laser transmitter, laser receiving target, and inclination sensor to the host computer;

[0030] S6. Install the adjustment guide mechanism at the corresponding position of the pressure vessel;

[0031] S7. Connect the centering lifting device to the hook of the crane through a wire rope and a hand chain hoist, and use the crane to lift the internal components of the pile to a certain height through the centering lifting device;

[0032] S8. Start the measurement software in the host computer, observe the horizontal value detected by the inclination sensor, and adjust the horizontality of the pile internal component by moving the crane or adjusting the length of the wire rope to make it consistent with the horizontality of the plane on the inner ring hole of the annular component;

[0033] S9, hoist the in-core component to the top of the pressure vessel, monitor the coordinate deviation between the in-core component and the reference axis of the annular component by means of a laser transmitter and a laser receiving target, and fine-tune the guide mechanism to assist in centering and guiding, so that the coordinate deviation is less than a preset threshold;

[0034] S10, slowly lower the internal components of the pile, and monitor the changes in the centering coordinates and levelness in real time through the measurement software; during the process, fine-tune the levelness through the hand chain hoist, and fine-tune the centering by adjusting the guide device until the internal components of the pile are lowered into place;

[0035] S11. Disconnect the remote connection tool from the in-pile components, lift out the centering lifting device, and complete the installation of the in-pile components.

[0036] The beneficial effects of the present invention are: 1. The present invention can realize the installation of the internal components in the extreme posture, remote unlocking, dynamic real-time display of the centering deviation during the installation process, fine-tuning of the centering status, etc., which reduces the dependence on the operating ability and professional skills of the personnel during the installation process, reduces the installation risk, improves the installation efficiency, and is suitable for standardized operation. 2. The centering sling can more effectively adjust the posture of the internal components of the pile, and adaptively match it with the lifting benchmark, especially the lifting of the horizontal extreme posture. 3. The centering and horizontality monitoring mechanism monitors the lifting posture and lifting centering of the internal components in real time, so as to achieve the purpose of improving the installation accuracy and installation efficiency. 4. The adjustment guide device can fine-tune the position of the internal components of the pile without relying on the crane to ensure the lifting accuracy. 5. The remote connection tool can realize the remote connection unlocking function between the centering sling and the internal components of the pile, avoiding the inconvenience of operation caused by the product structure and small space when the sling is unlocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the installation of the internal components of a reactor;

[0038] Figure 2 is a structural diagram of a device for high-precision installation of reactor internal components in extreme postures according to an embodiment of the present invention;

[0039] Figure 3 is a structural diagram of a centering sling in an embodiment of the present invention;

[0040] Figure 4 Schematic diagram of the installation of the centering and levelness monitoring mechanism in the embodiment of the present invention;

[0041] Figure 5 is a structural diagram of an adjustment guide mechanism in an embodiment of the present invention;

[0042] Figure 6 In the embodiment of the present invention Figure 5 Structural diagram of the regulating structure in the middle A direction;

[0043] Figure 7 is a structural diagram of a remote connection tool in an embodiment of the present invention;

[0044] Figure 8 is a connection diagram of the centering and levelness monitoring mechanism in an embodiment of the present invention;

[0045] Fig. 9 It is the display interface of the measurement software in the embodiment of the present invention.

[0046] In the figure: 1. Centering hanger; 101. Main body ring plate; 102. Connecting beam; 103. Reinforcement ring plate; 104. Coaxiality calibration hole; 105. Positioning pin connection structure; 106. Wire rope; 107. Laser receiving target positioning hole; 108. Shaft sleeve; 109. Guide rod; 2. Laser transmitter; 201. Laser transmitter mounting seat; 3. Laser receiving target; 4. Inclination sensor; 5. Adjustment guide mechanism; 501. Adjustment arm; 502. Roller; 503. Hand wheel; 504. Lead screw; 505. Guide rod; 506. Drive block; 6. Remote connection tool; 601. Main body rod; 602. Guide shaft; 603. Operating handle; 604. External thread; 8. In-pile components; 9. Pressure vessel; 901. Pressure vessel flange surface; 10. Annular component; 11. Inner ring hole. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] like Figure 2 As shown, in this embodiment, a high-precision installation device for extreme posture of reactor internal components is provided, including a centering hanger 1, a centering and horizontality monitoring mechanism, an adjustment guide mechanism 5 and a remote connection tool 6.

[0049] 1. Centering lifting device

[0050] In this embodiment, the axis and position state of the in-pile component 8 are transferred to the centering hanger 1 through the rigid connection between the centering hanger 1 and the in-pile component 8, and the axis of the in-pile component 8 is kept consistent with the reference axis by adjusting the centering hanger 1.

[0051] like Figure 3 As shown, in this embodiment, the centering hanger 1 is connected to the crane and the in-pile component 8 at the top and bottom respectively, so as to transfer the axis and position state of the in-pile component 8 to the centering hanger 1, and the centering hanger 1 is driven by the crane to drive the in-pile component 8 to move, so as to realize the centering installation of the in-pile component 8 and the annular component 10.

[0052] In this embodiment, the centering sling 1 includes a sling body, a guide rod 109, a coaxiality calibration hole 104 and a positioning pin connection structure 105; the sling body having a cylindrical frame structure is evenly spaced circumferentially with four guide rods 109 parallel to its axial direction, each guide rod 109 corresponds to an adjustment guide mechanism 5 (a total of four adjustment guide mechanisms 5), and the guide rod 109 is used in conjunction with the adjustment guide mechanism 5 to assist in guiding and fine-tuning the position of the in-pile component 8 during the lifting process; four positioning pin connection structures 105 are evenly spaced circumferentially at the lower end of the sling body, and the positioning pin connection structure 105 is used to achieve the connection between the sling body and the in-pile component 8.

[0053] The sling body includes a main body ring plate 1 and a connecting beam 102. The two main body ring plates 1 are coaxially arranged at intervals up and down. Eight connecting beams 102 parallel to the axial direction are evenly arranged between the two main body ring plates 1 along the circumference thereof. The two ends of the connecting beam 102 are respectively fixedly connected to the two main body ring plates 1; a plurality of coaxiality calibration holes 104 corresponding to each other are evenly arranged up and down on the two main body ring plates 1 along the circumference thereof; the two ends of the guide rod 109 are respectively fixedly connected to the two main body ring plates 1; the positioning pin connection structure 105 is arranged on the main body ring plate 1 located on the lower side.

[0054] The sling body also includes a reinforcing ring plate 103 . Two coaxial reinforcing ring plates 103 are sequentially arranged between the two main body ring plates 1 from top to bottom. The outer peripheral wall of the reinforcing ring plate 103 is fixedly connected to each of the connecting beams 102 .

[0055] Three lifting ears are evenly spaced circumferentially arranged on the main body ring plate 1 located on the upper side, and the wire rope 106 is connected through the lifting ears to achieve the connection between the crane and the centering lifting device 1.

[0056] Two laser receiving target positioning holes 107 are arranged on the upper main body ring plate, and two positioning pin connection structures 105 are arranged on the lower main body ring plate, which can ensure that the center of the coordinate system of the laser receiving target positioning hole 107 of the upper main body ring plate coincides with the center of the positioning pin connection structure 105 on the lower main body ring plate, and the center processing position accuracy of the laser receiving target positioning hole 107 is required to be consistent with the position accuracy of the laser light source on the annular component 10 inside the pressure vessel 9.

[0057] A positioning pin connection structure 105 is provided on the lower main body ring plate. Correspondingly, pin holes are provided on the in-pile component 8. The positioning pin connection structure 105 is correspondingly connected to the corresponding pin holes, thereby realizing the positioning connection between the centering sling 1 and the in-pile component 8.

[0058] The guide rods 109 are located outside the main structure, with four circumferential arrangements, and are fixed to the pressure vessel 9. The guide rods 109 are used in conjunction with the adjustment guide mechanism 5 to assist in guiding and fine-tuning the position of the in-pile components 8 during the lifting process.

[0059] The coaxiality calibration holes 104 are used to calibrate the coaxiality of the upper and lower main body ring plates 1 of the sling body, and two holes are set on each of the upper and lower main body ring plates 1. Since the internal component 8 is connected to the lower main body ring plate and positioned by the positioning pin connection structure 105, the laser receiving target 3 is installed on the upper main body ring plate. In order to determine the coaxiality deviation of the upper and lower main body ring plates 1, two coaxiality calibration holes 104 with the same position are processed on the upper and lower main body ring plates 1. The coaxiality calibration holes 104 can be installed with the laser transmitter 2 and the laser receiving target 3. Before the centering sling 1 is used, two laser transmitters 2 and two laser receiving targets 3 are respectively installed in the coaxiality calibration holes 104 on the upper and lower main body ring plates 1. The measurement data can obtain the coaxiality deviation of the upper and lower main body ring plates 1 and record it as the initial deviation value.

[0060] 2. Alignment and levelness monitoring mechanism

[0061] In this embodiment, by designing a centering and levelness monitoring device and adopting special technologies such as laser centering measurement, a coaxial reference position relationship is established between the two sets of laser transmitters 2 and the reference inside the pressure vessel 9, and a coaxial reference position relationship is established between the two sets of laser receiving targets 3 and the in-pile component 8 through the centering hanger 1. The centering installation status of the in-pile component 8 can be fed back by real-time monitoring of the coordinate deviation of the laser receiving target 3 relative to the light source; an inclination sensor 4 is arranged on the centering hanger 1 to monitor the levelness change of the in-pile component 8 in real time; the monitoring device is connected to the measurement software, and can display and record the centering and levelness data of the in-pile component 8 during the lifting process in real time.

[0062] like Figure 4 As shown, in this embodiment, the centering and levelness monitoring mechanism establishes reference associations with the annular component 10 and the centering hanger 1 respectively, so as to establish reference associations with the inner ring hole 11 of the annular component 10 and the in-pile component 8, thereby monitoring the centering installation condition and levelness changes of the in-pile component 8 in real time.

[0063] The centering and horizontality monitoring mechanism includes a laser emitter 2, a laser receiving target 3 and an inclination sensor 4; the upper main body ring plate is evenly spaced along its circumference and provided with two protrusions extending radially outward, the protrusions are provided with laser receiving target positioning holes 107, and the laser receiving target 3 is installed on the upper main body ring plate through the laser receiving target positioning holes 107; the upper surface of the annular member 10 is evenly spaced along its circumference and provided with two laser emitter mounting seats 201, the laser emitter 2 is installed on the laser emitter mounting seats 201, and the laser emitter 2 corresponds to the laser receiving target 3 one by one above and below; the lower main body ring plate is spaced along its circumference and provided with two inclination sensors 4, and the axes of the two inclination sensors 4 are perpendicular to each other.

[0064] In this embodiment, the laser emitter 2 is a device for emitting laser, and there are two of them; the laser emitter 2 is connected to the laser emitter mounting seat 201, and the mounting seat is connected, fixed and positioned with the inner annular component 10 of the pressure vessel 9 by means of diamond pins and reamed bolts (this positioning accuracy can be guaranteed by the processing position accuracy of the mounting pin hole of the mounting seat on the annular component 10), thereby ensuring that the central coordinate system of the two light sources coincides with the reference of the inner annular component 10 of the pressure vessel 9.

[0065] The laser receiving target 3 is a laser receiving device, and there are two of them in total. The laser receiving target 3 is installed in the laser receiving target positioning hole 107 of the upper main body ring plate. Through processing and assembly accuracy, it can be ensured that the center coordinate system of the laser receiving target 3 coincides with the axis reference of the sling main body.

[0066] When the sling body is positioned and connected to the in-pile component 8 through the positioning pin connection structure 105, and the reference of the annular component 10 in the pressure vessel 9 is the same as the reference of the inner ring hole 11, the purpose of reflecting the centering state of the in-pile component 8 and the inner ring hole 11 through laser measurement can be achieved by transferring the reference relationship.

[0067] The inclination sensor 4 is used to monitor the inclination state of the pile internal component 8 in real time during the lifting process. It is installed on the lower plate surface of the main structure of the centering hanger 1. It is a single-axis inclination sensor 4, with a total of two, and the positions are perpendicular to each other.

[0068] 3. Adjust the guide mechanism

[0069] In this embodiment, by designing and adjusting the guide mechanism 5, the in-pile component 8 can be fine-tuned based on the hoisting centering deviation and horizontality data of the in-pile component 8 monitored in real time by the measurement software without relying on the operator's vision and driving.

[0070] like Figure 5 and Figure 6 As shown, in this embodiment, the adjustment guide mechanism 5 cooperates with the centering hanger 1 to guide and fine-tune the position of the in-pile component 8 according to the centering deviation and horizontality data of the in-pile component 8 detected in real time.

[0071] In this embodiment, there are four adjustment guide mechanisms 5, which are respectively installed on the flange surface 901 of the pressure vessel at 45°, 135°, 225°, and 315°. The adjustment guide mechanism 5 includes an adjustment mechanism, an adjustment arm 501, and a roller 502. The adjustment arm 501 is L-shaped. The horizontal section of the adjustment arm 501 is connected to the adjustment mechanism and extends horizontally inward along the radial direction of the pressure vessel 9. The adjustment mechanism drives the horizontal section of the adjustment arm 501 to move in the horizontal direction; the vertical section of the adjustment arm 501 is connected to the horizontal section and extends vertically downward in a direction parallel to the axis of the pressure vessel 9. The vertical section is retractable. The roller 502 is arranged at the lower end of the vertical section, and the vertical section drives the roller 502 to move in the vertical direction; during the process of the internal component 8 descending, the roller 502 contacts the internal component 8 to play a guiding role. When the internal component 8 exceeds the range of the roller 502, the roller 502 contacts the guide rod 109 to continue to play a guiding role.

[0072] In this embodiment, the adjustment mechanism includes a handwheel 503, a lead screw 504, a drive block 506, a guide rod 505 and a fixed frame; the fixed frame is fixed to the upper surface of the pressure vessel 9, one end of the lead screw 504 is rotatably connected to the fixed frame, and the other end passes through the fixed frame and is connected to the handwheel 503, the lead screw 504 is threaded with a drive block 506, and the drive block 506 is connected to the adjustment arm 501; the rotation of the handwheel 503 drives the lead screw 504 to rotate, thereby causing the drive block 506 to move along the lead screw 504, thereby driving the adjustment arm 501 to move in the horizontal direction.

[0073] In order to ensure that the driving block 506 does not tilt during the movement and affect the movement of the adjusting arm 501, a guide rod 505 is arranged at intervals on the left and right sides of the lead screw 504, and both ends of the guide rod 505 are fixedly connected to the fixed frame. The two corresponding guide rods 505 on the driving block 506 are respectively provided with corresponding guide holes, and each guide rod 505 passes through the corresponding guide hole to provide guidance for the movement of the driving block 506.

[0074] 4. Remote connection tools

[0075] In this embodiment, by designing a remote connection tool 6 , the connection or unlocking of the centering lifting device 1 and the internal component 8 can be remotely operated above the centering lifting device 1 .

[0076] like Figure 7As shown, in this embodiment, in order to facilitate the connection between the centering sling 1 and the in-pile component 8, a remote connection tool 6 for connecting the centering sling 1 and the in-pile component 8 is provided; the remote connection tool 6 includes a main rod 601, an operating handle 603 and a guide shaft 602; the main rod 601 is vertically arranged, the operating handle 603 is vertically arranged at the upper end of the main rod 601, the middle and lower part of the main rod 601 is sleeved with a coaxial guide shaft 602, and the outer wall of the main rod 601 below the guide shaft 602 is provided with an external thread 604.

[0077] The corresponding positions of the upper and lower ends of the centering sling 1 are provided with corresponding connecting through holes along the circumference thereof, and the outer circumference of the connecting through hole provided at the lower end of the centering sling 1 is provided with a shaft sleeve 108 coaxial therewith, and the upper end of the internal component 8 is provided with a plurality of threaded connecting holes corresponding to the connecting through holes at intervals along the circumference thereof, and the threaded connecting holes are provided with internal threads;

[0078] The lower end of the main rod 601 passes through the connecting through holes on the upper and lower ends of the centering hanger 1 in turn and then extends into the threaded connecting hole on the in-pile component 8. The guide shaft 602 correspondingly extends into the shaft sleeve 108. The operating rod is rotated to make the internal thread engage with the external thread 604, so that the centering hanger 1 is connected to the in-pile component 8 up and down.

[0079] The operating handle 603 is located at the upper part of the centering sling 1, which is convenient for personnel to operate. The guide shaft 602 is located in the middle and lower part, and is adapted to the shaft sleeve 108 on the lower main body ring plate, and is used for quick guidance and positioning during installation. The lower end of the main body rod 601 is provided with an external thread 604, which is used for threaded connection with the annular component 10. The operator can realize remote connection or unlocking between the centering sling 1 and the internal component 8 through the remote connection tool 6.

[0080] like Figure 8 and Fig. 9 As shown, in this embodiment, a method for high-precision installation of reactor internals 8 in extreme posture is provided, comprising the following steps:

[0081] S1. Place the centering sling 1 on a horizontal operating platform, install the laser receiving target 3 and the laser transmitter 2 at the coaxiality calibration holes 104 of the upper and lower main body ring plates 1 of the centering sling 1 respectively, obtain the coaxiality deviation between the upper and lower main body ring plates 1 through the measurement data of the laser receiving target 3 and the laser transmitter 2, and record it as the initial deviation value; remove the corresponding laser receiving target 3 and the laser transmitter 2 from the coaxiality calibration hole 104;

[0082] S2, installing the laser emitter 2 at the corresponding position of the annular component 10;

[0083] S3, the centering lifting device 1 is fixedly connected to the pile internal component 8 via the positioning pin connection structure 105 and the remote connection tool 6;

[0084] S4, installing the laser receiving target 3 and the inclination sensor 4 at the corresponding positions on the centering hanger 1;

[0085] S5, connecting the laser transmitter 2, the laser receiving target 3, and the inclination sensor 4 to the host computer;

[0086] S6. Install the adjustment guide mechanism 5 at the corresponding position of the pressure vessel 9;

[0087] S7, connecting the centering lifting device 1 to the hook of the crane through the wire rope 106 and the hand chain hoist, and using the crane to lift the pile internal component 8 to a certain height through the centering lifting device 1;

[0088] S8. Start the measurement software in the host computer, observe the horizontal value detected by the inclination sensor 4, and adjust the horizontality of the internal component 8 by moving the crane or adjusting the length of the wire rope 106 so that it is consistent with the horizontality of the plane on the inner ring hole 11 of the annular component 10; (the measurement software can display the coordinate deviation value and spot position image of the two sets of laser centering equipment in real time during the hoisting process, and display the hoisting inclination angle in real time. Combined with the displayed coordinate value, spot position, and inclination angle, it can be used to judge the position and centering of the internal component 8)

[0089] S9, hoist the internal component 8 to just above the pressure vessel 9, monitor the coordinate deviation between the internal component 8 and the reference axis of the annular component 10 through the laser transmitter 2 and the laser receiving target 3, and fine-tune the guide mechanism 5 to assist in centering and guiding, so that the coordinate deviation is less than a preset threshold;

[0090] S10, slowly lowering the internal component 8, and monitoring the changes in the centering coordinates and levelness in real time through the measurement software; during the process, fine-tuning the levelness through the hand chain hoist, and fine-tuning the centering by adjusting the guide device, until the internal component 8 falls into place;

[0091] S11 , disconnect the remote connection tool 6 from the in-pile component 8 , lift out the centering lifting device 1 , and complete the installation of the in-pile component 8 .

[0092] By adopting the above technical solution disclosed in the present invention, the following beneficial effects are obtained:

[0093] The present invention provides a high-precision installation device and installation method for reactor internal components in extreme postures. The present invention can realize the installation of internal components in extreme postures, remote unlocking, dynamic real-time display of centering deviations during installation, fine-tuning of centering status, etc., which reduces the dependence on personnel's operating ability and professional skills during installation, reduces installation risks, improves installation efficiency, and is suitable for standardized operations. The centering sling can more effectively adjust the posture of the internal components of the reactor and adaptively match it with the lifting benchmark, especially the horizontal extreme posture lifting. The centering and horizontality monitoring mechanism monitors the lifting posture and lifting centering of the internal components in real time, thereby achieving the purpose of improving installation accuracy and installation efficiency. The guide device can be adjusted to fine-tune the position of the internal components without relying on the crane to ensure the lifting accuracy. The remote connection tool can realize the remote connection unlocking function between the centering sling and the internal components of the reactor, avoiding the inconvenience of operation caused by the product structure and small space when the sling is unlocked.

[0094] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A high-precision installation device for reactor internal components at extreme attitudes, characterized in that: It includes a centering sling, a centering and levelness monitoring mechanism, and an adjustment guide mechanism; The centering lifting device is connected to the crane and the internal component above and below, respectively, so as to transfer the axis and position state of the internal component to the centering lifting device, and the centering lifting device is driven by the crane to drive the internal component to move, so as to realize the centering installation of the internal component and the annular component inside the pressure vessel; The centering sling comprises a sling body, a guide rod, a coaxiality calibration hole and a positioning pin connection structure; the sling body of the cylindrical frame structure is evenly spaced in the circumference and parallel to the axial direction thereof, each guide rod corresponds to an adjustment guide mechanism, and the guide rod is used in conjunction with the adjustment guide mechanism to assist in guiding and fine-tuning the position of the internal components during the lifting process; at least two positioning pin connection structures are evenly spaced in the circumference of the lower end of the sling body, and the positioning pin connection structure is used to realize the connection and positioning of the sling body and the internal components; The centering and levelness monitoring mechanism establishes reference associations with the internal annular component of the pressure vessel and the centering hanger, respectively, so as to establish reference associations with the inner annular hole of the internal annular component of the pressure vessel and the internal components of the pile, thereby monitoring the centering installation status and levelness changes of the internal components of the pile in real time; The adjustment guide mechanism cooperates with the centering hanger to achieve guidance and position fine adjustment of the internal components of the pile according to the centering deviation and horizontality data of the internal components detected in real time; The upper surface of the pressure vessel is evenly spaced along its circumference with a plurality of adjustment guide mechanisms corresponding to the guide rods one by one; the adjustment guide mechanism comprises an adjustment mechanism, an adjustment arm and a roller, the adjustment arm is L-shaped, the horizontal section of the adjustment arm is connected to the adjustment mechanism and extends horizontally inward along the radial direction of the pressure vessel, and the adjustment mechanism drives the horizontal section of the adjustment arm to move in the horizontal direction; the vertical section of the adjustment arm is connected to the horizontal section and extends vertically downward in a direction parallel to the axis of the pressure vessel, the vertical section is retractable, the roller is arranged at the lower end of the vertical section, and the vertical section drives the roller to move in the vertical direction; During the process of the internal components of the pile being lowered, the rollers are in contact with the internal components of the pile. When the internal components of the pile are beyond the range of the rollers, the rollers are in contact with the guide rods.

2. The reactor internal component extreme attitude high-precision installation device according to claim 1, characterized in that: The sling body includes a main body ring plate and a connecting beam. The two main body ring plates are coaxially arranged with an interval up and down. A plurality of connecting beams parallel to the axial direction are evenly arranged between the two main body ring plates along their circumferences. The two ends of the connecting beam are respectively fixedly connected to the two main body ring plates; a plurality of coaxiality calibration holes corresponding to each other are evenly arranged on the two main body ring plates along their circumferences; the two ends of the guide rod are respectively fixedly connected to the two main body ring plates; the positioning pin connection structure is arranged on the main body ring plate located on the lower side.

3. The reactor internal component extreme attitude high-precision installation device according to claim 2, characterized in that: The sling body also includes a reinforcing ring plate, and a plurality of reinforcing ring plates coaxial therewith are sequentially arranged between the two main body ring plates from top to bottom, and the outer peripheral wall of the reinforcing ring plate is fixedly connected to each of the connecting beams.

4. The reactor internal component extreme attitude high-precision installation device according to claim 2, characterized in that: The centering and horizontality monitoring mechanism includes a laser emitter, a laser receiving target and an inclination sensor; the upper main body ring plate is evenly spaced along its circumference and is provided with at least two protrusions extending radially outward, the protrusions are provided with laser receiving target positioning holes, and the laser receiving target is installed on the upper main body ring plate through the laser receiving target positioning holes; at least two laser emitter mounting seats are evenly spaced along its circumference on the upper surface of the internal annular component of the pressure vessel, a laser emitter is installed on the laser emitter mounting seat, and the laser emitter corresponds to the laser receiving target one by one in the upper and lower directions; the lower main body ring plate is spaced along its circumference and is provided with two inclination sensors, and the axes of the two inclination sensors are perpendicular to each other.

5. The reactor internals extreme attitude high-precision installation device according to claim 1, characterized in that: The adjustment mechanism includes a handwheel, a lead screw, a driving block, a guide rod and a fixed frame; the fixed frame is fixed to the upper surface of the pressure vessel, one end of the lead screw is rotatably connected to the fixed frame, and the other end passes through the fixed frame and is connected to the handwheel, the lead screw is threaded with a driving block, and the driving block is connected to the adjustment arm; the rotation of the handwheel drives the lead screw to rotate, and then the driving block moves along the lead screw, thereby driving the adjustment arm to move in the horizontal direction.

6. The reactor internals extreme attitude high-precision installation device according to claim 5, characterized in that: At least one guide rod is arranged at intervals on the left and / or right side of the lead screw, and both ends of the guide rod are fixedly connected to the fixed frame. Corresponding guide holes are respectively arranged on the two guide rods on the driving block, and each guide rod passes through the corresponding guide hole to provide guidance for the movement of the driving block.

7. The reactor internals extreme attitude high-precision installation device according to claim 1, characterized in that: The device also includes a remote connection tool for connecting the centering hanger and the in-pile component; the remote connection tool includes a main rod, an operating handle and a guide shaft; the main rod is vertically arranged, the operating handle is vertically arranged at the upper end of the main rod, the middle and lower part of the main rod is sleeved with a coaxial guide shaft, and the outer wall of the main rod below the guide shaft is provided with an external thread; The upper and lower ends of the centering sling are provided with corresponding connecting through holes along the circumference thereof, the outer circumference of the connecting through hole provided at the lower end of the centering sling is provided with a shaft sleeve coaxial therewith, and the upper end of the internal component is provided with a plurality of threaded connecting holes corresponding to the connecting through holes at intervals along the circumference thereof, and the threaded connecting holes are provided with internal threads; The lower end of the main rod passes through the connecting through holes on the upper and lower ends of the centering hanger in turn and then extends into the threaded connecting hole on the internal component of the pile. The guide shaft correspondingly extends into the shaft sleeve. The operating rod is rotated to make the internal thread engage with the external thread, so that the centering hanger is connected to the internal component of the pile up and down.

8. A method for high-precision installation of reactor internal components at extreme attitudes, characterized in that: The following steps are included: S1. Place the centering spreader on a horizontal operating platform, install the laser receiving target and the laser transmitter at the coaxiality calibration holes of the upper and lower main body ring plates of the centering spreader respectively, obtain the coaxiality deviation between the upper and lower main body ring plates through the measurement data of the laser receiving target and the laser transmitter, and record it as the initial deviation value; remove the corresponding laser receiving target and laser transmitter from the coaxiality calibration hole; S2, installing the laser transmitter at the corresponding position of the annular component inside the pressure vessel; S3, fixing the centering hanger to the internal components of the pile via the positioning pin connection structure and the remote connection tool; S4. Install laser receiving targets and inclination sensors at corresponding positions on the centering spreader; S5, connecting the laser transmitter, laser receiving target, and inclination sensor to the host computer; S6. Install the adjustment guide mechanism at the corresponding position of the pressure vessel; S7. Connect the centering lifting device to the hook of the crane through a wire rope and a hand chain hoist, and use the crane to lift the internal components of the pile to a certain height through the centering lifting device; S8. Start the measurement software in the host computer, observe the horizontal value detected by the inclination sensor, and adjust the horizontality of the internal component of the pile by moving the crane or adjusting the length of the wire rope so that it is consistent with the horizontality of the plane on the inner ring hole of the internal annular component of the pressure vessel; S9, hoist the in-core component to the top of the pressure vessel, monitor the coordinate deviation between the in-core component and the reference axis of the annular component inside the pressure vessel by means of a laser transmitter and a laser receiving target, and fine-tune the guide mechanism to assist in centering and guiding, so that the coordinate deviation is less than a preset threshold; S10, slowly lower the internal components of the pile, and monitor the changes in the centering coordinates and levelness in real time through the measurement software; during the process, fine-tune the levelness through the hand chain hoist, and fine-tune the centering by adjusting the guide device until the internal components of the pile are lowered into place; S11. Disconnect the remote connection tool from the in-pile components, lift out the centering lifting device, and complete the installation of the in-pile components.

Images