Disassembling tool for underwater irradiation monitoring device

Abstract

The application discloses a dismounting tool for underwater irradiation monitoring equipment and belongs to the field of nuclear energy equipment. The tool solves the problem that the existing dismounting tool is not suitable for the working environment, operation space and working step sequence of the underwater irradiation monitoring equipment. In the application, a sliding table system is installed on the upper end of a reactor vessel, the upper end of a vertical telescopic sleeve mechanism is connected with the sliding table system and is driven to move through the sliding table system; an extraction tool is installed on the lower end of the vertical telescopic sleeve mechanism; a pulling-out tool pulls out the irradiation monitoring equipment; after the pulling-out tool pulls out the irradiation monitoring equipment, the extraction tool clamps the irradiation monitoring equipment and lifts the irradiation monitoring equipment in the reactor vessel. The dismounting tool for underwater irradiation monitoring equipment is suitable for the radioactive underwater environment and meets the requirements of mechanical control on the dismounting of the irradiation monitoring equipment and the irradiation resistance requirement.

Description

Technical Field

[0001] This invention relates to a disassembly and assembly tool for underwater irradiation monitoring equipment, belonging to the field of nuclear power equipment. Background Technology

[0002] Because nuclear power plant reactor cores operate in a high-temperature, high-pressure environment, to further understand whether the material properties of the core meet the subsequent reactor operating conditions during each operational cycle, a device made of the same material as the reactor core (irradiation monitoring equipment) is typically placed between the pressure vessel edge and the core, operating in the same environment. During the operation and maintenance of the nuclear power plant, this irradiation monitoring equipment needs to be removed to test its material properties and thus determine the stability of the reactor core.

[0003] During reactor pressure vessel shutdown and refueling, the irradiation monitoring equipment needs to be disassembled and reassembled, at which time the reactor pressure vessel is filled with coolant. The irradiation monitoring equipment is located below the reactor backflow annulus and needs to be pulled out from the bottom during disassembly. It is also crucial to avoid touching the reactor backflow annulus above, which places extremely stringent requirements on the disassembly tools and the working environment. Summary of the Invention

[0004] This invention provides a tool for disassembling and assembling underwater irradiation monitoring equipment, used in the operation and maintenance of nuclear power plants. It enables efficient removal, safe extraction, and smooth rotation of monitoring equipment installed on the edge of the reactor pressure vessel within the reactor pool. It is suitable for operation in radioactive underwater environments and meets the mechanical control requirements for disassembling irradiation monitoring equipment and the requirements for radiation resistance.

[0005] The technical solution adopted by the present invention is a disassembly and assembly tool for an underwater irradiation monitoring device, including a vertical telescopic sleeve mechanism, the lower end of which has a gripping mechanism;

[0006] The disassembly and assembly tools for the underwater irradiation monitoring equipment also include a slide system and a reactor container, a grabbing mechanism is an extraction tool, and a vertical telescopic sleeve mechanism is installed inside the reactor container;

[0007] The slide system is installed on the upper end of the reactor vessel, and the upper end of the vertical telescopic sleeve mechanism is connected to the slide system and driven to move by the slide system.

[0008] The extraction tool is installed at the lower end of the vertical telescopic sleeve mechanism; the extraction tool includes a pull-out tool and an extraction tool; during the disassembly and assembly of the underwater irradiation monitoring equipment, the pull-out tool pulls out the irradiation monitoring equipment; after the pull-out tool pulls out the irradiation monitoring equipment, the extraction tool clamps the irradiation monitoring equipment and lifts it into the reactor vessel.

[0009] The optimized disassembly and assembly tools for the aforementioned underwater irradiation monitoring equipment include a vertical telescopic sleeve mechanism comprising a winch, a telescopic sleeve, and a rotary motor.

[0010] The winch device includes a winch base plate and a winch, with the winch mounted on the winch base plate. The winch base plate is mounted on a slide table system and is driven by a rotary motor to rotate relative to the slide table system.

[0011] The winch has a winch wire rope, the end of which extends into a telescopic sleeve and the telescopic sleeve is retracted by the winch.

[0012] The optimized disassembly and assembly tool for the aforementioned underwater irradiation monitoring equipment uses a multi-segment telescopic sleeve, which comprises multiple sleeve segments that are sequentially connected. The end of the winch wire rope extends into and is fixed within the lower sleeve segment of the telescopic sleeve.

[0013] The optimized disassembly and assembly tool for the aforementioned underwater irradiation monitoring equipment includes a slide system comprising a slide base, a central support plate, and a platform; the slide base is installed on the upper opening of the reactor vessel; the central support plate is located on the slide base and slides relative to the slide base, and the platform is located on the central support plate and slides relative to the central support plate;

[0014] The upper end of the vertical telescopic sleeve mechanism is mounted on the table surface; holes are respectively constructed in the slide base, the middle support plate, and the middle part of the table surface, and the lower end of the vertical telescopic sleeve mechanism passes through the holes in the slide base, the middle support plate, and the middle part of the table surface.

[0015] The optimized disassembly and assembly tools for the aforementioned underwater irradiation monitoring equipment include a tool frame, which is fixed to the end of the telescopic sleeve mechanism and moves within the reactor vessel as the telescopic sleeve mechanism extends and retracts.

[0016] The pull-out tool and the extraction tool are installed on both sides of the tool rack.

[0017] The optimized disassembly and assembly tool for the aforementioned underwater irradiation monitoring equipment includes a pull-out tool comprising a pull-out motor and a pull-out tool head. The pull-out motor is mounted on the upper part of the tool frame, and the pull-out tool head is mounted on the lower part of the tool frame. The power output end of the pull-out motor is connected to the pull-out tool head via a screw mechanism and drives the pull-out tool head to move.

[0018] The optimized disassembly and assembly tool for the aforementioned underwater irradiation monitoring equipment includes an extraction tool head, which is mounted on the lower part of the tool holder on the side away from the extraction tool.

[0019] The extraction tool head is cylindrical, and the surface of the extraction tool head has a ring-shaped through hole with an expansion bead inside the through hole. The extraction tool head has a pneumatic push rod inside. After the pneumatic push rod moves down, it pushes the expansion bead to move out of the extraction tool head, and the expansion bead protrudes out of the through hole.

[0020] The optimized disassembly and assembly tool for the aforementioned underwater irradiation monitoring equipment has a pull-out tool head with several claw heads and a pneumatic push rod II. One end of all the claw heads is annularly hinged to the lower end of the pull-out tool head, and all the claw heads surround the pneumatic push rod II.

[0021] After the pneumatic push rod 2 moves down, it pushes the end of the chuck head away from the tool head to expand in a direction away from the pneumatic push rod 2 and locks with the end of the irradiation monitoring equipment.

[0022] The optimized disassembly and assembly tools for the aforementioned underwater irradiation monitoring equipment also include a monitoring system and a pressure sensor, with the pressure sensor working in conjunction with the extraction tool.

[0023] The advantages of this application are:

[0024] The disassembly and assembly tool described in this application meets the requirements for disassembling irradiation monitoring equipment at a certain depth in the reactor pool. It overcomes the problem of limited operating space and the inability to allow manual assistance, and automates all the procedures required for disassembly. It avoids the risks associated with irradiation, completely eliminates the need for manual intervention in disassembly, and thus protects on-site operators.

[0025] The technical solution of this application enables movement in three-dimensional space above the reactor, allowing for disassembly operations directly via remote control positioning. The disassembly and assembly tools are installed above the reactor refueling water jacket, ensuring stable installation and operation of the entire device without generating lateral forces, thus minimizing the risk of collision with the reactor interior during the process.

[0026] The technical solution of this application is not only applicable to nuclear power plants, but can also be introduced into the installation and dismantling of underwater equipment in containers in other fields, thus making it more practical and having industrial value. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this application;

[0028] Figure 2 This is a schematic diagram of the slide system of this application;

[0029] Figure 3 This is a structural schematic diagram of the vertical telescopic sleeve mechanism of this application;

[0030] Figure 4 This is a schematic diagram of the extraction tool of this application;

[0031] Figure 5 This is a schematic diagram of the workflow of this application;

[0032] Figure 6 This is a schematic diagram showing the placement of the pull-out tool head in this application;

[0033] Figure 7 This is a schematic diagram showing the placement of the extraction tool head in this application;

[0034] Figure 8 This is a schematic diagram showing the installation location of the wire sensor in this application;

[0035] Figure 9 for Figure 4 Enlarged view of point E;

[0036] Figure 10 for Figure 4 Enlarged view of point F. Detailed Implementation

[0037] The technical features of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] As shown in the figure, this invention is a disassembly and assembly tool for an underwater irradiation monitoring device, comprising a sliding platform system 1, a vertical telescopic sleeve mechanism 2, an extraction tool 3, and a reactor container 4. The reactor container 4 has an upper opening, and the underwater irradiation monitoring device is installed in the lower part of the reactor container 4. A reactor backflow annular cavity is located on the upper middle section of the side wall inside the reactor container 4, protruding from the inner wall of the reactor container 4. The sliding platform system 1 is installed at the upper opening of the reactor container 4. The upper end of the vertical telescopic sleeve mechanism 2 is mounted on the sliding platform system 1 and moved by the sliding platform system 1. The lower end of the vertical telescopic sleeve mechanism 2 enters the reactor container 4. The extraction tool 3 is installed at the lower end of the vertical telescopic sleeve mechanism 2 and is raised by the vertical telescopic sleeve mechanism 2.

[0039] As shown in the figure, the slide system 1 includes an X-axis motor 201, a Y-axis motor 202, a central support plate 203, a table surface 204, and a slide base 205.

[0040] The slide base 205 is fixedly installed on the upper opening of the reactor vessel 4. The slide base 205 has an X-axis track. The central support plate 203 is installed on the slide base 205 and moves along the X-axis track. The X-axis motor 201 is installed on the slide base 205, and the power output end of the X-axis motor 201 is connected to a screw arranged parallel to the X-axis track. The screw passes through the threaded block at the lower part of the central support plate 203 and is threadedly connected to the threaded block at the lower part of the central support plate 203. The X-axis motor 201 drives the screw to rotate, providing the moving power for the central support plate 203.

[0041] The central support plate 203 has a Y-axis track, which is perpendicular to the X-axis track. The platform 204 is mounted on the central support plate 203 and moves along the Y-axis track. The Y-axis motor 202 is mounted on the central support plate 203, and the power output end of the Y-axis motor 202 is connected to a screw rod two arranged parallel to the Y-axis track. The screw rod two passes through a threaded block at the bottom of the platform 204 and is threadedly connected to the threaded block at the bottom of the platform 204. The Y-axis motor 202 drives the screw rod two to rotate, providing the moving power for the platform 204.

[0042] The vertical telescopic sleeve mechanism 2 includes a sleeve platform, a winch device 301, a telescopic sleeve 302, and a rotary motor 303. The winch device 301 and the rotary motor 303 are mounted on the sleeve platform, which is rotatably mounted on the platform 204. The upper end of the telescopic sleeve 302 is connected to the sleeve platform.

[0043] The slide base 205, the middle support plate 203, and the platform 204 each have through holes in their middle sections. The lower end of the telescopic sleeve 302 passes through the holes in the middle sections of the slide base 205, the middle support plate 203, and the platform 204 and extends into the reactor vessel 4. The movement of the platform 204 and the middle support plate 203 in the X and Y axes drives the vertical telescopic sleeve mechanism 2 to move. The rotation of the sleeve platform and the platform 204 is driven by a rotary motor 303.

[0044] The winch has a winch wire rope, the end of which extends into the telescopic sleeve 302 and the telescopic sleeve 302 is retracted by the winch. In this embodiment, the telescopic sleeve 302 is a three-section telescopic sleeve, with the three sleeve sections of the telescopic sleeve 302 connected sequentially. The end of the winch wire rope extends into and is fixed in the lower sleeve section of the telescopic sleeve 302. By winding the winch wire rope by the winch device 301, the telescopic sleeve 302 can be retracted, thereby causing the extraction tool 3 to move upward within the reactor vessel 4.

[0045] Extraction tool 3 includes a pull-out tool and an extraction tool. During the disassembly and assembly of the underwater irradiation monitoring equipment, the pull-out tool pulls the irradiation monitoring equipment out. After the pull-out tool pulls out the irradiation monitoring equipment, the extraction tool grips the irradiation monitoring equipment and lifts it inside the reactor vessel 4.

[0046] The irradiation monitoring tube equipment uses an interference fit, relying on the structural features between the devices to achieve the locking function. The extraction tool 3 includes a tool holder, which is fixed to the end of the telescopic sleeve mechanism 2 and moves within the reactor vessel 4 as the telescopic sleeve mechanism 2 extends and retracts. Pull-out tools and extraction tools are respectively installed on both sides of the tool holder. The pull-out tool includes a pull-out motor 401 and a pull-out tool head 402. The pull-out motor 401 is installed on the upper part of the tool holder, and the pull-out tool head 402 is installed on the lower part of the tool holder. The power output end of the pull-out motor 401 is connected to the pull-out tool head 402 via a screw mechanism and drives the pull-out tool head 402 to move.

[0047] The tool head 402 is mainly used for clamping. The radiation monitoring equipment is pulled out from the locking fit by pulling out the motor 401, and then the equipment is transferred by pulling out the tool head 404.

[0048] As shown in the figure, the extraction tool head 404 is mounted on the lower part of the tool holder, away from the extraction tool. The extraction tool head 404 is cylindrical, and its surface has annularly arranged through holes with expansion beads 4041 inside. The extraction tool head 404 has a pneumatic push rod 4042 inside. After the pneumatic push rod 4042 moves downward, it pushes the expansion beads 4041 to move outward from the extraction tool head 404, and part of the expansion beads 4041 protrudes out of the through holes.

[0049] As shown in the figure, the extraction tool head 402 has several jaw heads 4021 and a pneumatic push rod 4022. One end of all the jaw heads 4021 is annularly hinged to the lower end of the extraction tool head 402, and all the jaw heads 4021 surround the pneumatic push rod 4022. After the pneumatic push rod 4022 moves down, it pushes the end of the jaw heads 4021 away from the extraction tool head 402 to expand in a direction away from the pneumatic push rod 4022 and lock it to the end of the irradiation monitoring equipment.

[0050] The entire extraction process is monitored by the monitoring system 403 to ensure real-time monitoring of each action by the operator during device operation. The pressure sensor 405 is used in conjunction with the extraction tool.

[0051] The technical solution of this application will be further explained below in conjunction with the workflow.

[0052] The extraction tool in the equipment mainly operates through the three-dimensional (X, Y, Z) movement of the cross slide and the vertical telescopic sleeve, as well as the rotation of the telescopic sleeve, which switches the working position of the tool head. The entire operation sequence is as follows: Figure 5 As shown.

[0053] A: Move the pull-out tool head 402 to the irradiation monitoring equipment's gripping position. Figure 6At this point, pressure sensor 405 will fall onto the worktable. After the value displayed by pressure sensor 405 stabilizes, the cylinder of pneumatic push rod 4022 will be activated, pushing pneumatic push rod 4022 downward, which in turn will push the jaw head 4021 to expand, causing the jaw head 4021 to tighten the upper end of the irradiation monitoring equipment. Then, pull-out motor 401 will be activated. At this time, pull-out motor 401 drives the screw to rotate and drives the pull-out tool head 402 upward, which will apply an upward pull-out force to the irradiation monitoring equipment. At the same time, the device will also receive a downward reaction force. At this time, the pressure sensor 405 below will be subjected to pressure, and the value of the control system pressure sensor 405 will suddenly increase until it returns to the value before the pull-out motor 401 was activated. At this time, the irradiation monitoring equipment has been pulled out, and the data feedback of pressure sensor 405 also plays a monitoring and protection role.

[0054] B: Since the irradiation monitoring equipment is installed below the reverse flow annular cavity, if the winch device 301 is directly activated for extraction, the extraction motor 401 will collide with the reverse flow annular cavity. Therefore, it is necessary to release the extraction tool head 402, return the device to its initial position, start the rotary motor 303, switch to the extraction motor, and move the device to... Figure 7 Start the rotary motor 303 at the indicated position.

[0055] CD: After the pneumatic extraction of tool head 404, the winch device 301 is activated to retract the telescopic sleeve 302, thereby extracting the irradiation monitoring equipment and placing it on the corresponding recovery fixture. A torque sensor 304 is mounted on the winch device 301. Figure 8 As shown, this is used to ensure that the winch device 301 receives the gravity of sections 2 and 3 of the telescopic sleeve 302 throughout the entire process. This serves as a secondary monitoring and protection function.

[0056] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should be protected by the present invention.

Claims

1. A disassembly and assembly tool for an underwater irradiation monitoring device, comprising a vertical telescopic sleeve mechanism (2), wherein the lower end of the vertical telescopic sleeve mechanism (2) has a gripping mechanism; characterized in that: It also includes a slide system (1) and a reactor vessel (4), the gripping mechanism is an extraction tool (3), and the vertical telescopic sleeve mechanism (2) is installed inside the reactor vessel (4); The slide system (1) is installed on the upper end of the reactor vessel (4), and the upper end of the vertical telescopic sleeve mechanism (2) is connected to the slide system (1) and driven to move through the slide system (1); The extraction tool (3) is installed at the lower end of the vertical telescopic sleeve mechanism (2); the extraction tool (3) includes a pull-out tool and an extraction tool; during the disassembly and assembly of the underwater irradiation monitoring equipment, the pull-out tool pulls out the irradiation monitoring equipment; after the pull-out tool pulls out the irradiation monitoring equipment, the extraction tool clamps the irradiation monitoring equipment and lifts the irradiation monitoring equipment inside the reactor vessel (4); The extraction tool (3) includes a tool frame, which is fixed to the end of the telescopic sleeve mechanism (2) and moves within the reactor vessel (4) as the telescopic sleeve mechanism (2) extends and retracts; The pull-out tool and the extraction tool are installed on both sides of the tool rack, respectively; The vertical telescopic sleeve mechanism (2) includes a winch device (301), a telescopic sleeve (302), and a rotary motor (303). The winch device (301) includes a winch base plate and a winch, with the winch mounted on the winch base plate; the winch base plate is mounted on the slide table system (1) and driven by a rotary motor (303), the winch base plate and the slide table system (1) rotate relative to each other; The winch has a winch wire rope, the end of which extends into a telescopic sleeve (302) and the telescopic sleeve (302) is retracted by the winch.

2. The disassembly and assembly tool for the underwater irradiation monitoring equipment according to claim 1, characterized in that: The telescopic sleeve (302) is a multi-segment telescopic sleeve, which includes multiple sleeve segments. The multiple sleeve segments of the telescopic sleeve (302) are connected in sequence. The end of the hoisting wire rope extends into the sleeve segment at the lower end of the telescopic sleeve (302) and is fixed.

3. The disassembly and assembly tool for the underwater irradiation monitoring equipment according to claim 1, characterized in that: The slide system (1) includes a slide base (205), a central support plate (203), and a platform (204); the slide base (205) is installed on the upper opening of the reactor vessel (4); the central support plate (203) is located on the slide base (205) and slides relative to the slide base (205); the platform (204) is located on the central support plate (203) and slides relative to the central support plate (203); The upper end of the vertical telescopic sleeve mechanism (2) is mounted on the table (204); holes are constructed in the middle of the slide base (205), the middle support plate (203), and the table (204), and the lower end of the vertical telescopic sleeve mechanism (2) passes through the holes in the middle of the slide base (205), the middle support plate (203), and the table (204).

4. The disassembly and assembly tool for the underwater irradiation monitoring equipment according to claim 1, characterized in that: The pulling tool includes a pulling motor (401) and a pulling tool head (402); the pulling motor (401) is installed on the upper part of the tool holder, and the pulling tool head (402) is installed on the lower part of the tool holder. The power output end of the pulling motor (401) is connected to the pulling tool head (402) through a screw mechanism and drives the pulling tool head (402) to move.

5. The disassembly and assembly tool for the underwater irradiation monitoring equipment according to claim 1, characterized in that: The extraction tool includes an extraction tool head (404), which is mounted on the lower part of the tool holder on the side away from the extraction tool. The extraction tool head (404) is cylindrical. The surface of the extraction tool head (404) has a through hole arranged in a ring and an expansion bead (4041) is set in the through hole. The extraction tool head (404) has a pneumatic push rod (4042). After the pneumatic push rod (4042) moves down, it pushes the expansion bead (4041) to move to the outside of the extraction tool head (404) and the expansion bead (4041) protrudes out of the through hole.

6. The disassembly and assembly tool for the underwater irradiation monitoring equipment according to claim 4, characterized in that: The pull-out tool head (402) has a plurality of claw heads (4021) and a pneumatic push rod two (4022). One end of all the claw heads (4021) is annularly hinged to the lower end of the pull-out tool head (402), and all the claw heads (4021) surround the pneumatic push rod two (4022). After the pneumatic push rod 2 (4022) moves down, it pushes the claw head (4021) away from the end of the pull-out tool head (402) to expand in a direction away from the pneumatic push rod 2 (4022) and lock it with the end of the irradiation monitoring device.

7. The disassembly and assembly tool for the underwater irradiation monitoring equipment according to claim 5, characterized in that: The extraction tool (3) also includes a monitoring system (403) and a pressure sensor (405), which is configured in conjunction with the extraction tool.

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