Radiation shield structure for electrical units of decommissioning robot for nuclear facilities

Abstract

The nuclear facility decommissioning and demolition robot electric unit radiation shielding structure comprises a platform, an electric box, a shielding cover and a supporting piece; the platform is a rectangular plate; the electric box comprises a box body, a box cover and a heavy load plug; the box body is made of a radiation shielding material, and an inner cavity for accommodating the electric unit is arranged in the box body; the box cover is made of a radiation shielding material, and the box cover is detachably installed on an open end of the upper end of the box body; the heavy load plug is fixedly installed on a mounting port of the box body; the shielding cover is made of a radiation shielding material, an inner cavity for accommodating the electric box is arranged in the shielding cover, and the shielding cover is arranged above the electric box through an open end of the lower end of the shielding cover; and the supporting piece supports the electric box directly above the rear end of the platform. The electric element of the nuclear decommissioning robot is effectively radiated and shielded, the electric element is prevented from being irradiated excessively and damaged, the operation reliability of the nuclear decommissioning robot is improved, and the service life of the nuclear decommissioning robot is prolonged.

Description

Technical Field

[0001] This invention relates to the field of nuclear decommissioning robot technology, and in particular to a radiation shielding structure for the electrical unit of a nuclear facility decommissioning and dismantling robot. Background Technology

[0002] In recent years, as early nuclear power plants built in various countries have reached the end of their service life, countries have begun to close military and civilian nuclear power plants, and the resulting issue of nuclear facility decommissioning has become apparent. According to statistics from the International Atomic Energy Agency, more than 200 nuclear facilities have been decommissioned, with a global market worth hundreds of billions of US dollars.

[0003] Nuclear facility decommissioning is a systematic project involving a wide range of technologies, including source term investigation, radiation intensity detection, decontamination, facility dismantling, waste disposal, radiation protection, and site decontamination. The decommissioning process generally employs three strategies: immediate dismantling, delayed dismantling, and containment / burial. The latter two strategies occupy the nuclear power plant site for an extended period, and the high maintenance costs result in low economic returns from nuclear decommissioning. Furthermore, containment / burial strategies may lead to leaks over time due to material aging and failure. Therefore, most countries prioritize immediate dismantling when relocating nuclear power plants. However, due to the unique limitations of the nuclear environment, on-site personnel are susceptible to significant internal and external radiation exposure, potentially leading to injuries or fatalities.

[0004] To address the challenges of on-site radiation measurement and engineering implementation at nuclear facilities, while simultaneously protecting personnel, it is essential to research and design nuclear decommissioning robots to replace manual labor in the dismantling of nuclear facilities. Due to the unique nature of their operating environments, the electrical components of nuclear decommissioning robots, if directly exposed without any protective measures, are easily susceptible to performance degradation or even failure due to excessive radiation. Therefore, designing radiation shielding structures for these electrical components is crucial for extending the service life of nuclear decommissioning robots and improving their operational reliability. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a radiation shielding structure for the electrical unit of a nuclear facility decommissioning and dismantling robot. This structure provides effective radiation shielding for the electrical components of the nuclear decommissioning robot, preventing them from failing or being damaged due to excessive radiation, thereby improving the operational reliability of the nuclear decommissioning robot and extending its service life.

[0006] The technical solution of this invention is: a radiation shielding structure for the electrical unit of a nuclear facility decommissioning and dismantling robot, comprising a platform, an electrical box, a shielding cover, and supporting components; The platform is a rectangular plate with a robotic arm connection at the front end and a support component connection area at the rear end; The electrical box includes a box body, a cover, and a heavy-duty plug. The box body is made of radiation-shielding material and has an internal cavity for accommodating electrical units. An opening at the top of the box connects to this cavity, and a mounting port on the front side wall connects to the cavity. The cover, also made of radiation-shielding material, is detachably mounted on the opening at the top of the box and closes it. The heavy-duty plug is fixedly mounted on the mounting port and located outside the front of the box. The front of the box aligns with the front of the platform, and the rear of the box aligns with the rear of the platform. The shielding cover is made of radiation shielding material. The shielding cover has an inner cavity for accommodating the electrical box. The lower end of the shielding cover has an opening that connects to the inner cavity. The shielding cover is installed above the electrical box through its lower opening and encloses the electrical box in its inner cavity. The top wall of the inner cavity is in contact with the upper surface of the box cover. The front side wall of the shielding cover has a double cavity. The front end of the shielding cover is aligned with the front end of the platform, and the rear end of the shielding cover is aligned with the rear end of the platform. The lower end of the support component is fixedly connected to the support component connection area of ​​the platform, and the upper end is fixedly connected to the electrical box, supporting the electrical box directly above the rear end of the platform.

[0007] A further technical solution of the present invention is: a vertically arranged shielding plate A is provided in the inner cavity of the enclosure, and a first gap is formed between the shielding plate A and the enclosure cover for power lines and / or signal lines to pass through. The shielding plate A divides the inner cavity of the enclosure into a main cavity for accommodating electrical units and a secondary cavity for accommodating power lines and / or data lines. The secondary cavity is directly connected to the mounting port of the enclosure.

[0008] A further technical solution of the present invention is as follows: the support component includes a Z-shaped plate, an L-shaped plate, side support plates, and a middle and rear support column; the Z-shaped plate is disposed between the rear end of the platform and the rear end of the box body, and the Z-shaped plate includes an upper horizontal edge, a main body, and a lower horizontal edge connected sequentially from top to bottom; the lower horizontal edge of the Z-shaped plate is fixedly connected to the middle of the rear end edge of the platform, and the upper horizontal edge of the Z-shaped plate is fixedly connected to the middle of the rear end of the lower surface of the box body; the L-shaped plate includes a vertical plate and a horizontal plate, and the vertical plate of the L-shaped plate is fixedly connected to the upper end of the main body of the Z-shaped plate, and the L-shaped plate... The transverse plate is parallel to the lower surface of the box and extends to the front end of the box. A second gap is formed between the transverse plate of the L-shaped plate and the lower surface of the box. The side support plate has a bent part at the upper end. The two side support plates are fixedly connected to the rear end of the upper surface of the platform at the lower end. The two side support plates extend into the second gap through the bent part at the upper end and are fixedly connected to the transverse plate section of the L-shaped plate at the upper end. The lower end of the middle and rear support column is fixedly connected to the middle of the rear end of the upper surface of the platform, and the upper end of the middle and rear support column is fixedly connected to the middle of the transverse plate section of the L-shaped plate.

[0009] A further technical solution of the present invention is: a bent section is provided at the lower end of the front side wall of the shielding cover, and when the shielding cover is installed above the electrical box through its lower open end, the bent section is in a horizontal state; The support also includes a front-middle support column; the lower end of the front-middle support column is fixedly connected to the middle of the rear end of the upper surface of the platform and is closer to the front end of the platform than the rear-middle support column, and the upper end of the front-middle support column is fixedly connected to the bent section of the shield.

[0010] A further technical solution of the present invention is that the Z-shaped plate and the two side support plates are connected to the platform in an isosceles triangle arrangement.

[0011] A further technical solution of the present invention is: a sandwich cavity is provided on the front side wall of the shielding cover, and a shielding plate B is movably installed in the sandwich cavity.

[0012] Compared with the prior art, the present invention has the following advantages: 1. It applies effective radiation shielding (based on the housing, cover and shielding cover made of radiation shielding material) to the electrical components of the nuclear decommissioning robot, which prevents the electrical components from failing or even being damaged by excessive radiation, thereby improving the operational reliability of the nuclear decommissioning robot and extending its service life.

[0013] 2. A shielding plate A made of radiation shielding material is installed in the inner cavity of the enclosure, which supplements the radiation protection at the heavy-duty plug and prevents external radiation from radiating onto the electrical components in the inner cavity of the enclosure from the mounting port of the enclosure.

[0014] 3. The weight of the electrical box is distributed to four locations at the rear of the platform through the support components (the four locations are the lower end of the Z-shaped plate, the lower end of the two side support plates, and the lower end of the middle and rear support column). The center point of the four pressure-bearing locations is located on the center line of the platform, which not only ensures the operational stability of the nuclear decommissioning robot, but also does not occupy the installation position of the nuclear decommissioning robot's body (meeting the space feasibility requirements).

[0015] 4. The L-shaped plate in the support component connects the two side support plates and the Z-shaped plate into a whole, thereby improving the connection strength and anti-damage performance of the support component.

[0016] The present invention will be further described below with reference to the figures and embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a diagram showing the positional relationship between the platform, electrical box, and supporting components in this invention; Figure 3 This is an internal cross-sectional view of the present invention; Figure 4 This is a schematic diagram of the structure of the nuclear decommissioning robot that utilizes the present invention.

[0018] Legend: Platform 1; Robotic arm connection 11; Box 21; Mounting port 211; Shielding plate A 212; Main cavity 213; Secondary cavity 214; Box cover 22; Heavy-duty plug 23; Shielding cover 3; Bending section 31; Interlayer cavity 32; Z-shaped plate 41; L-shaped plate 42; Side support plate 43; Bending part 431; Middle and rear support column 44; Middle and front support column 45; Shielding plate B5; First gap 100; Second gap 200. Detailed Implementation Example 1

[0019] like Figure 1-4 As shown, the radiation shielding structure of the electrical unit of the nuclear facility decommissioning and dismantling robot includes a platform 1, an electrical box 2, a shielding cover 3, and supporting components.

[0020] Platform 1 is a rectangular plate with a robotic arm connection part 11 at its front end and a support member connection area at its rear end.

[0021] The electrical box includes a box body 21, a cover 22, and a heavy-duty plug 23. The box body 21 is made of radiation-shielding material and has an internal cavity for accommodating electrical units. The upper end of the box body 21 has an opening connecting to this internal cavity, and the front side wall of the box body 21 has a mounting port 211 connecting to this internal cavity. The cover 22 is also made of radiation-shielding material and is detachably mounted on the opening at the upper end of the box body 21, closing the opening. The heavy-duty plug 23 is fixedly mounted on the mounting port 211 of the box body 21 and is located outside the front end of the box body 21. The front end of the box body 21 is aligned with the front end of platform 1, and the rear end of the box body 21 is aligned with the rear end of platform 2.

[0022] The shielding cover 3 is made of radiation shielding material. Inside the shielding cover 3 is an inner cavity for accommodating the electrical box, and the lower end of the shielding cover 3 has an opening connecting to this inner cavity. The shielding cover 3, through its lower opening, covers the electrical box above it and encloses it within its inner cavity. The top wall of its inner cavity contacts the upper surface of the box cover 22. The area at the lower opening opposite the heavy-duty plug 23 is the cable exit area (power lines and / or signal lines extending from the heavy-duty plug 23 extend downwards through this area and enter the body of the nuclear decommissioning robot). The front end of the shielding cover 3 is aligned with the front end of the platform 1, and the rear end of the shielding cover 3 is aligned with the rear end of the platform.

[0023] The lower end of the support member is fixedly connected to the support member connection area 11 of the platform 1, and the upper end is fixedly connected to the electrical box, supporting the electrical box directly above the rear end of the platform 1. The support member includes a Z-shaped plate 41, an L-shaped plate 42, a side support plate 43, and a middle and rear support column 44. The Z-shaped plate 41 is disposed between the rear end of the platform 41 and the rear end of the box 21. The Z-shaped plate 41 includes an upper horizontal edge, a main body, and a lower horizontal edge connected sequentially from top to bottom. The lower horizontal edge of the Z-shaped plate 41 is fixedly connected to the middle of the rear edge of the platform 1, and the upper horizontal edge of the Z-shaped plate 41 is fixedly connected to the middle of the rear end of the lower surface of the box 21. The L-shaped plate 42 includes a vertical plate and a horizontal plate. The vertical plate of the L-shaped plate 42 is fixedly connected to the upper end of the main body of the Z-shaped plate 41. The horizontal plate of the L-shaped plate 42 is parallel to the lower surface of the box 21 and extends to the front end of the box 21. A second gap 200 is formed between the horizontal plate of the L-shaped plate 42 and the lower surface of the box 21. The side support plate 43 has a bent portion 431 at its upper end. The two side support plates 43 are respectively fixedly connected to the rear end of the upper surface of the platform 1 at their lower ends. The two side support plates 43 extend into the second gap 200 through the bent portion 431 at their upper ends and are respectively fixedly connected to the sides of the transverse plate segment of the L-shaped plate 42. The lower end of the middle and rear support column 44 is fixedly connected to the middle of the rear end of the upper surface of the platform 1, and the upper end of the middle and rear support column 44 is fixedly connected to the middle of the transverse plate segment of the L-shaped plate 42.

[0024] Preferably, the shielding cover 3 has a sandwich cavity 32 on the front side wall, and a shielding plate B5 is movably installed in the sandwich cavity 32. This enhances the radiation shielding effect at the front of the nuclear decommissioning robot while also realizing the counterweight setting of the nuclear decommissioning robot (on the one hand, when the nuclear decommissioning robot is working, the front of the robot usually faces the radiation source, so the radiation dose in front of the operation is relatively higher, and it is necessary to add protection at the front of the robot; on the other hand, when the nuclear decommissioning robot is working, since the robotic arm is arranged at the front of the robot, all operations are completed at the front of the robot. In order to ensure working stability and prevent the robot from tipping over, it is necessary to set a suitable counterweight at the rear of the robot).

[0025] Preferably, a vertically arranged shielding plate A212 is provided inside the enclosure 21. A first gap 100 is formed between the shielding plate A212 and the enclosure cover, allowing power lines and / or signal lines to pass through. The shielding plate A212 divides the interior of the enclosure 21 into a main cavity 213 for accommodating electrical units and a secondary cavity 214 for accommodating power lines and / or data lines. The secondary cavity 214 is directly connected to the mounting port 211 of the enclosure 21. Based on the shielding plate A212, radiation protection at the heavy-duty plug 23 is supplemented, preventing external radiation from radiating from the mounting port 211 of the enclosure 21 onto the electrical components inside the enclosure 21.

[0026] Preferably, the lower end of the front side wall of the shielding cover 3 is provided with a bent section 31, which is horizontal when the shielding cover 3 is installed above the electrical box. The support also includes a front-middle support column 45. The lower end of the front-middle support column 45 is fixedly connected to the middle of the rear end of the upper surface of the platform 1, and is closer to the front end of the platform 1 than the rear-middle support column 44. The upper end of the front-middle support column 45 is fixedly connected to the bent section 31 of the shielding cover 3.

[0027] Preferably, the connection points of the Z-shaped plate 41 and the two side support plates 43 to the platform 1 are distributed in an isosceles triangle. Based on this feature, the weight of the electrical box is distributed to four locations at the rear end of the platform 1 through the support components (the four locations are the lower end of the Z-shaped plate 41, the lower end of the two side support plates 43, and the lower end of the middle and rear support column 44), and the center point of the four pressure-bearing locations is located on the centerline of the platform 1, which ensures the operational stability of the nuclear decommissioning robot without occupying the installation space of the nuclear decommissioning robot's body (meeting the space feasibility requirements).

Claims

1. The radiation shielding structure of the electrical unit of the nuclear facility decommissioning and dismantling robot is characterized by: Includes platform, electrical box, shielding cover, and support components; The platform is a rectangular plate with a robotic arm connection at the front end and a support component connection area at the rear end; The electrical box includes a box body, a cover, and a heavy-duty plug. The box body is made of radiation-shielding material and has an internal cavity for accommodating electrical units. An opening at the top of the box connects to this internal cavity, and a mounting port on the front side wall connects to the internal cavity. The cover is also made of radiation-shielding material and is detachably mounted on the opening at the top of the box, closing it. The heavy-duty plug is fixedly mounted on the mounting port and located outside the front of the box. The front of the box aligns with the front of the platform, and the rear of the box aligns with the rear of the platform. A vertically arranged shielding plate A is located within the internal cavity of the box. A first gap is formed between the shielding plate A and the cover, allowing power lines and / or signal lines to pass through. The shielding plate A divides the internal cavity into a main cavity for accommodating electrical units and a secondary cavity for accommodating power lines and / or data lines. The secondary cavity is directly connected to the mounting port of the box. The shielding cover is made of radiation shielding material. The shielding cover has an inner cavity for accommodating the electrical box. The lower end of the shielding cover has an opening that connects to the inner cavity. The shielding cover is installed above the electrical box through its lower opening and encloses the electrical box in its inner cavity. The top wall of the inner cavity is in contact with the upper surface of the box cover. The front side wall of the shielding cover has a double cavity. The front end of the shielding cover is aligned with the front end of the platform, and the rear end of the shielding cover is aligned with the rear end of the platform. The lower end of the support component is fixedly connected to the support component connection area of ​​the platform, and the upper end is fixedly connected to the electrical box, supporting the electrical box directly above the rear end of the platform. The support component includes a Z-shaped plate, an L-shaped plate, side support plates, and a middle and rear support column. The Z-shaped plate is located between the rear end of the platform and the rear end of the box. The Z-shaped plate includes an upper horizontal edge, a main body, and a lower horizontal edge connected sequentially from top to bottom. The lower horizontal edge of the Z-shaped plate is fixedly connected to the middle of the rear edge of the platform, and the upper horizontal edge of the Z-shaped plate is fixedly connected to the middle of the rear end of the lower surface of the box. The L-shaped plate includes a vertical plate and a horizontal plate. The vertical plate of the L-shaped plate is fixedly connected to the middle of the rear edge of the platform. The L-shaped plate is fixedly connected to the upper part of the main body of the Z-shaped plate. The transverse plate of the L-shaped plate is parallel to the lower surface of the box and extends to the front end of the box. A second gap is formed between the transverse plate of the L-shaped plate and the lower surface of the box. The side support plate has a bent part at the upper end. The two side support plates are fixedly connected to the rear end of the upper surface of the platform at the lower end. The two side support plates extend into the second gap through the bent part at the upper end and are fixedly connected to the transverse plate section of the L-shaped plate at the upper end. The lower end of the middle and rear support column is fixedly connected to the middle of the rear end of the upper surface of the platform, and the upper end of the middle and rear support column is fixedly connected to the middle of the transverse plate section of the L-shaped plate.

2. The radiation shielding structure for the electrical unit of the nuclear facility decommissioning and dismantling robot as described in claim 1, characterized in that: The lower end of the front side wall of the shielding cover is provided with a bent section. When the shielding cover is installed above the electrical box through its lower open end, the bent section is in a horizontal state. The support also includes a front-middle support column; the lower end of the front-middle support column is fixedly connected to the middle of the rear end of the upper surface of the platform and is closer to the front end of the platform than the rear-middle support column, and the upper end of the front-middle support column is fixedly connected to the bent section of the shield.

3. The radiation shielding structure for the electrical unit of the nuclear facility decommissioning and dismantling robot as described in claim 2, characterized in that: The Z-shaped plate and the two side support plates are connected to the platform at positions that form an isosceles triangle.

4. The radiation shielding structure for the electrical unit of the nuclear facility decommissioning and dismantling robot as described in claim 3, characterized in that: A sandwich cavity is provided on the front side wall of the shielding cover, and a shielding plate B is movably installed in the sandwich cavity.

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