A device and method for opening a stainless steel tank for radioactive waste liquid

Abstract

The application discloses a kind of opening devices and methods of radioactive waste liquid stainless steel storage tank, including water cutting main body, horizontal moving motor, rotary support, cylindrical guide rail, opening component, cleaning component, stainless steel opening support, horizontal moving screw rod, rotary motor, base;The application carries out opening operation of radioactive stainless steel storage tank by remote control, avoids that operating personnel enters high radiation place and operates, effectively reduces the dose of personnel exposure.By the application, radioactive waste liquid storage tank detection and decommissioning tool can be inserted, and the process of nuclear facility decommissioning is accelerated.

Description

Technical Field

[0001] This invention relates to the field of nuclear facility decommissioning technology. Specifically, it relates to a device and method for opening a stainless steel storage tank for radioactive waste liquid. Background Technology

[0002] Most domestic nuclear facilities were built in the 1950s and 60s. Due to the limitations of the conditions and technology at the time, intermediate and high-level radioactive waste generated during nuclear activities were generally stored in large-volume tanks buried deep underground. These temporary storage tanks for radioactive waste lack the necessary means for inspecting the tanks themselves, making it impossible to accurately assess the degree of corrosion and posing a risk of leakage. Furthermore, the tank designs have too few pre-drilled holes to meet the requirements for inserting inspection and decommissioning equipment. Therefore, it is necessary to develop appropriate perforation devices tailored to the structural characteristics of radioactive waste storage tanks to facilitate decommissioning and inspection work. Summary of the Invention

[0003] The purpose of this invention is to provide a device and method for opening holes in radioactive stainless steel storage tanks, which can open holes in radioactive waste liquid storage tanks buried 1600mm underground, so as to insert the detection device and decommissioning device of the radioactive storage tank, thereby accelerating the decommissioning process of the radioactive storage tank.

[0004] The technical solution of the present invention is as follows: a device for opening holes in a stainless steel storage tank for radioactive waste liquid, comprising a water cutting body, a horizontal moving motor, a rotary support, a cylindrical guide rail, an opening component, a cleaning component, a stainless steel opening bracket, a horizontal moving screw, a rotary motor, and a base.

[0005] The waterjet cutting body is located on the side of the base;

[0006] The base includes a base body, electromagnets, a coarse guiding device, and positioning pins; electromagnets are installed on both sides of the base body, and a coarse guiding device and positioning pins are also installed on the base body.

[0007] The opening component includes a positioning sensor, a water jet cutter head, a lifting body, a lifting gear, a lifting servo motor, a lifting rack, and a lifting guide rail; the lifting servo motor is connected to the lifting gear, the lifting gear meshes with the lifting rack, the lifting guide rail is connected to the right side of the lifting rack, the positioning sensor is installed at the front end of the water jet cutter head, and the lower end of the opening component is connected to an aircraft bolt.

[0008] A horizontal moving motor is connected to a horizontal moving screw, which is mounted parallel to a cylindrical guide rail on a stainless steel perforated bracket. A slider is mounted on the cylindrical guide rail, and a connecting plate is fixed to the slider with screws. Nuts are welded to the side of the connecting plate to cooperate with the horizontal moving screw. The perforated component, cleaning component, and rotary support are mounted on the connecting plate. A rotary motor is mounted below the connecting plate, driving the gear on the plate to rotate. Rotary supports are located on both sides of the gear.

[0009] Two eyebolts are installed on the top of the base body; six adjustable feet are installed on the bottom of the base body.

[0010] Four electromagnets are installed on each side of the base.

[0011] The slewing support rotates, causing the cleaning components and the opening components to rotate.

[0012] It also includes a remote control system that controls the opening components and cleaning components.

[0013] A method for opening a stainless steel storage tank for radioactive waste liquid includes the following steps:

[0014] a: First, place the base body on the ground to determine the range of the opening location;

[0015] b: Start the cleaning unit; the cleaning unit descends to the designated position and begins operation.

[0016] c: Turn on the horizontal moving motor to move the opening component along the horizontal moving screw to the opening position;

[0017] d: Open the opening component, and the lifting servo motor in the opening component drives the water jet cutter head to descend to the set position;

[0018] e: When the hole-opening device performs hole-opening operations, move the water jet cutter head to the center position where the hole needs to be opened, cut the center hole, and then insert the aircraft bolt into the center hole;

[0019] f: Turn on the rotary motor, the slewing support rotates, driving the opening component to perform a rotary cutting motion, completing the opening of the stainless steel storage tank for radioactive waste liquid.

[0020] In step b, the cleaning component is started via a remote control system.

[0021] In step b, the descent position of the cleaning component is determined by a positioning sensor; in step d, the descent position of the water jet head is determined by a positioning sensor.

[0022] In step e, a center hole with a diameter of 15 mm is cut.

[0023] It also includes step g: After the hole is drilled, the aircraft bolt will remove the cut stainless steel plate, and all parts will return to their original positions.

[0024] The significant advantages of this invention are:

[0025] (1) The present invention enables the opening of radioactive stainless steel storage tanks by remote control, avoiding the need for workers to enter high-radiation areas and effectively reducing the radiation dose to personnel.

[0026] (2) Through this invention, the detection and decommissioning equipment for radioactive waste storage tanks can be installed, thus accelerating the decommissioning process of nuclear facilities. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the opening device for the stainless steel storage tank for radioactive waste liquid according to the present invention.

[0028] Figure 2 Schematic diagram of the opening component and cleaning component

[0029] In the diagram: 1. Waterjet cutting body; 2. Horizontal moving motor; 3. Rotary support; 4. Cylindrical guide rail; 5. Opening component; 6. Cleaning component; 7. Stainless steel opening bracket; 8. Horizontal moving lead screw; 9. Rotary motor; 10. Electromagnet; 11. Base body; 12. Eye bolt; 13. Reference surface; 14. Positioning pin; 15. Adjustable foot; 16. Coarse guide device; 17. Positioning sensor; 18. Waterjet cutter head; 19. Lifting body; 20. Lifting gear; 21. Lifting servo motor; 22. Lifting rack; 23. Lifting guide rail; 24. Aircraft bolt. Detailed Implementation

[0030] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0031] The terminology used in one or more embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of one or more embodiments of this application. The singular forms “a,” “the,” and “the” used in one or more embodiments of this application and in the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” used in one or more embodiments of this application refers to and includes any or all possible combinations of one or more associated listed items.

[0032] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this application, and similarly, second may also be referred to as first.

[0033] like Figure 1As shown, the opening device for the stainless steel storage tank of radioactive waste liquid includes a water cutting body 1, a horizontal moving motor 2, a rotary support 3, a cylindrical guide rail 4, an opening component 5, a cleaning component 6, a stainless steel opening bracket 7, a horizontal moving screw 8, a rotary motor 9, a base, and a remote control system.

[0034] The waterjet cutting body 1 mainly provides the high-pressure water and abrasive required for waterjet cutting to the hole-opening device.

[0035] The base is used for installing the radioactive stainless steel drilling device, facilitating subsequent testing and placement of decommissioning fixtures, and simultaneously determining the approximate location of the storage tank opening. It includes a base body 11, electromagnets 10, adjusting feet 15, eye bolts 12, a coarse guide device 16, and positioning pins 14. Two eye bolts 12 are installed on the top of the base body 11 for easy hoisting; six adjusting feet 15 are installed below the base body 11 to adjust the levelness of the upper surface of the base, ensuring the levelness of the base and the verticality of the pre-drilled hole; four electromagnets 10 are installed on each side of the base body 11, which are used to fix the drilling device after being energized; the coarse guide device 16 and positioning pins 14 are used to position the drilling device on the base body 11. The coarse guide device 16 first positions the device within a certain range, and as the drilling device gradually descends, it slides into the three positioning pins 14.

[0036] The opening component 5 includes a positioning sensor 17, a water jet cutter head 18, a lifting body 19, a lifting gear 20, a lifting servo motor 21, a lifting rack 22, and a lifting guide rail 23. The opening component 5 is used to realize the opening action of the opening device and complete the opening of the radioactive waste liquid storage tank. The cleaning component 6 is mainly used to clean the area where the opening is needed to prevent debris above the storage tank from falling into the storage tank. The lifting servo motor 21 is connected to the lifting gear 20, and the lifting gear 20 meshes with the lifting rack 22. The lifting guide rail 23 is connected to the right side of the lifting rack 22 to realize the high-precision lifting movement of the opening component. The positioning sensor 17 is installed at the front end of the water jet cutter head 18 to accurately locate the position where the opening is needed in the storage tank. The lower end of the opening component is connected to the aircraft bolt 24. After the water jet completes the center opening, the aircraft bolt 24 is inserted to prevent the cut stainless steel plate from falling into the storage tank and to remove the cut stainless steel plate.

[0037] The horizontal moving motor 2 is connected to the horizontal moving screw 8 and is installed parallel to the cylindrical guide rail 4 on the stainless steel perforated bracket 7. A connecting plate is fixed to the slider of the cylindrical guide rail 4 with screws. Nuts are welded to the side of the plate to cooperate with the horizontal moving screw 8. The perforated component 5, the cleaning component 6, and the rotary support 3 are installed on the plate. The rotary motor 9 is installed below the plate and drives the gear on the plate to rotate. The rotary supports 3 are on both sides of the gear. When the rotary supports 3 rotate, they drive the cleaning component 6 and the perforated component 5 to rotate.

[0038] The method for opening a radioactive stainless steel storage tank comprises the following steps:

[0039] a: First, place the base body 11 on the ground, determine the approximate range of the opening position, and install the opening device on the base body 11;

[0040] b: Start the cleaning component 6 on the remote control system console, set the value at which the cleaning device needs to descend, and after the positioning sensor 17 sends a signal, the cleaning component 6 stops descending and starts working to clean the debris above the radioactive waste liquid storage tank.

[0041] c: Turn on the horizontal moving motor 2, so that the opening component 5 moves along the horizontal moving screw 8 to the opening position;

[0042] d: Open the opening component 5 in the control panel. The lifting servo motor 21 in the opening component 5 drives the water jet cutter head 18 and the positioning sensor 17 to descend. Set the descent value of the water jet cutter head 18. When it descends to the set position, the positioning sensor 17 sends a signal and the water jet cutter head 18 stops descending.

[0043] e: When the hole-making device is performing hole-making operations, move the water jet cutter head 18 to the center position where the hole needs to be made, cut the center hole of about 15mm with the water jet, and then insert the aircraft bolt 24 into the center hole.

[0044] f: Turn on the rotary motor 9, the rotary support 3 rotates, driving the opening component 5 to perform a rotary cutting motion, and complete the opening of the radioactive waste liquid stainless steel storage tank.

[0045] g: After drilling is completed, the aircraft bolt 24 will remove the cut stainless steel plate, and all parts will return to their original positions.

[0046] The above description is merely a preferred embodiment of this patent and is not intended to limit this patent. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this patent shall be included within the scope of protection of this patent.

[0047] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0048] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0049] The preferred embodiments disclosed above are merely illustrative of this application. The optional embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this application. These embodiments are selected and specifically described in this application to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application.

Claims

1. A device for opening a stainless steel storage tank for radioactive waste liquid, characterized in that: It includes a waterjet cutting body (1), a horizontal moving motor (2), a rotary support (3), a cylindrical guide rail (4), a hole-opening component (5), a cleaning component (6), a stainless steel hole-opening bracket (7), a horizontal moving lead screw (8), a rotary motor (9), and a base. The waterjet cutting body (1) is located on the side of the base; The base includes a base body (11), an electromagnet (10), a coarse guide device (16), and a positioning pin (14); electromagnets (10) are provided on both sides of the base body (11), and a coarse guide device (16) and a positioning pin (14) are also provided on the base body (11). The opening component (5) includes a positioning sensor (17), a water jet cutter head (18), a lifting body (19), a lifting gear (20), a lifting servo motor (21), a lifting rack (22), and a lifting guide rail (23); the lifting servo motor (21) is connected to the lifting gear (20), the lifting gear (20) meshes with the lifting rack (22), the lifting guide rail (23) is connected to the right side of the lifting rack (22), the positioning sensor (17) is installed at the front end of the water jet cutter head (18), and the lower end of the opening component (5) is connected to the aircraft bolt (24); A horizontal moving motor (2) is connected to a horizontal moving screw (8). The horizontal moving screw (8) and the cylindrical guide rail (4) are installed parallel to each other on a stainless steel perforated bracket (7). A slider is installed on the cylindrical guide rail (4). A connecting plate is fixed on the slider with screws. Nuts are welded to the side of the connecting plate and the nuts cooperate with the horizontal moving screw (8). The perforated component (5), the cleaning component (6), and the rotary support (3) are installed on the connecting plate. The rotary motor (9) is installed below the connecting plate and drives the gear on the connecting plate to rotate. The rotation of the gear drives the rotary support (3) on both sides of the gear to rotate. Two eye bolts (12) are provided on the top of the base body (11); six adjustable feet (15) are provided on the bottom of the base body (11); Four electromagnets (10) are respectively installed on both sides of the base body (11); The slewing support (3) rotates, causing the cleaning component (6) and the opening component (5) to rotate; It also includes a remote control system, which controls the opening component (5) and the cleaning component (6).

2. A method for opening a stainless steel storage tank for radioactive waste liquid, using the opening device for a stainless steel storage tank for radioactive waste liquid as described in claim 1, characterized in that: Includes the following steps: a: First, place the base body (11) on the ground and determine the range of the opening position; b: Start the cleaning component (6), determine the descent position of the cleaning component (6) through the positioning sensor (17), and the cleaning component (6) descends to the designated position and starts working; c: Turn on the horizontal moving motor (2) to move the opening component (5) along the horizontal moving screw (8) to the opening position; d: Open the opening component (5), and the lifting servo motor (21) in the opening component (5) drives the water jet cutter head (18) to descend to the set position; the position of the water jet cutter head (18) is determined by the positioning sensor (17); e: When the hole-opening device performs hole-opening operations, the water jet cutter head (18) is moved to the center position where the hole needs to be opened, the center hole is cut, and then the aircraft bolt (24) is inserted into the center hole; f: Turn on the rotary motor (9), the rotary support (3) rotates, driving the opening component (5) to perform a rotary cutting motion, and complete the opening of the radioactive waste liquid stainless steel storage tank; g: After the hole is opened, the aircraft bolt (24) will pull out the cut stainless steel plate and all parts will return to their original positions. In step b, the cleaning component (6) is activated via a remote control system; In step e, a center hole with a diameter of 15 mm is cut.

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