阅读说明：本技术 一种可移动轨道式屏风辐射屏蔽装置 (Movable rail type screen wind radiation shielding device ) 是由 韩毅 沈华亚 陈法国 杨明明 张龙龙 李国栋 梁润成 于 2021-07-20 设计创作，主要内容包括：本发明属于放射性废物辐射防护领域,涉及一种可移动轨道式屏风辐射屏蔽装置。提供了一种可移动轨道式屏风辐射屏蔽装置,解决了核电厂此类放射性热点的屏蔽难题,降低了对操作人员的辐射剂量,既实现了屏蔽装置整体稳定性和安全性,又保证了安装便捷性。同时,采用本发明提供的可移动轨道式屏风辐射屏蔽装置可形成自稳定框架式结构,有效避免了屏蔽装置与热点设备直接接触,不会对系统设备造成负重安全影响；而且可单独使用,也可多个组合使用,在不影响系统功能的前提下,实现了满足多种类型热点区域的整体屏蔽要求。(The invention belongs to the field of radioactive waste radiation protection, and relates to a movable rail type screen wind radiation shielding device. The utility model provides a portable rail mounted screen wind radiation shield assembly, solved the shielding difficult problem of this type of radioactive hot spot of nuclear power plant, reduced the radiation dose to operating personnel, both realized shield assembly overall stability and security, guaranteed the installation convenience again. Meanwhile, the movable rail type screen wind radiation shielding device provided by the invention can form a self-stabilizing frame type structure, so that the shielding device is effectively prevented from being in direct contact with hotspot equipment, and load safety influence on system equipment is avoided; and the shielding device can be used independently or in combination of a plurality of types, and the overall shielding requirement of various types of hot spot areas is met on the premise of not influencing the system function.)

1. The utility model provides a portable rail mounted screen wind radiation shield assembly which characterized in that, the device includes whole frame, guide rail, slider, hoist and mount upper portion, hoist and mount lower part, slip screen module, universal wheel, wherein:

the sliding screen module is made of stainless steel wrapped outside a No. 1 lead material;

the integral frame comprises an upper integral frame and a lower integral frame, and the sliding block can be slidably arranged on a guide rail fixedly arranged on the upper surface of the inner frame of the upper integral frame and the lower integral frame; the upper hoisting part is fixedly arranged on the sliding block, and the lower hoisting part matched with the upper hoisting part is fixedly connected with the upper hoisting part; the lower end of the sliding screen module is arranged in a guide rail fixedly arranged on the lower surface of the inner frame of the upper integral frame or the lower integral frame, and the upper end of the sliding screen module is fixedly arranged with the lower hoisting part; the universal wheels are arranged at the bottom of the lower integral frame.

2. The movable rail-mounted screen radiation shield of claim 1 further comprising a leg stop, a bottom leg, a bottom foot; the fixed end of the supporting leg limiting piece is assembled and connected with the bottom of the outer frame of the lower integral frame through a positioning pin and a fixing bolt; the bottom supporting leg is connected with the movable end of the supporting leg limiting piece, and the bottom supporting leg is fixedly connected with the bottom supporting leg; along with the rotation of the movable end of the leg limiting part, the bottom support leg is unfolded in the supporting surface, and the integral frame forms a self-stabilizing frame structure.

3. The movable rail type screen radiation shielding device of claim 1, further comprising wall legs and a rotating component, wherein the rotating component rotates in a plane perpendicular to the whole frame and is fixedly connected with the wall through the wall legs.

4. The movable rail type screen radiation shielding device of claim 1, wherein the guide rails are fixedly installed on the upper and lower surfaces of the inner frames of the upper and lower integrated frames by screw assemblies; the hoisting upper parts are fixedly arranged on the corresponding sliding blocks through screws, and the matched hoisting lower parts are fixedly connected with the hoisting upper parts through screw assemblies; the screw assembly comprises an inner hexagonal socket head screw, a spring pad, a flat pad and a hexagon nut.

5. The movable rail-mounted screen radiation shielding device of claim 1, wherein the upper end of each sliding screen module is fixedly connected with the two lower hanging parts by screw fittings, and the screw fittings comprise an inner hexagonal socket head screw, a spring pad and a flat pad.

6. A movable rail-mounted screen radiation shielding device according to claim 1, wherein the sliding screen module is a standard product having an equivalent lead equivalent of 2 cm; the thickness of the sliding screen module is adjusted by superposition installation and use so as to meet the requirement of on-site shielding; the two sides of the sliding screen module are provided with portable handles.

7. The movable rail-mounted wind-shield radiation-shielding apparatus of claim 6, wherein said universal wheels are self-locking universal wheels.

8. A movable rail-mounted screen radiation shielding device according to any one of claims 1-7, wherein the sliding screen module is mounted in the upper integral frame only or in the lower integral frame only, depending on the hotspot height position and shielding range.

9. The movable track type screen radiation shielding device of claim 8, wherein the integral frames are combined and connected into a linear combination by means of hinges so as to shield the required hot spot range.

10. The movable track type screen radiation shielding device of claim 8, wherein the integral frames are combined and connected through the wall legs, the rotating components and/or the hinges to form a movable track type screen radiation shielding device combination of an L-shaped combination, a U-shaped combination and a mouth-shaped combination with various included angles.

Technical Field

The invention belongs to the field of radioactive radiation protection, and relates to a movable rail type screen wind radiation shielding device.

Background

Deposition of corrosion activation products in active areas of a reactor pressure vessel, where fuel assemblies are loaded, on equipment, valves, inner walls of pipelines, etc. of a primary system and auxiliary systems thereof is a major source of radioactivity in nuclear power plants. Over time, these areas with deposits develop points or local locations of greater radioactivity, often referred to as radioactive hot spots (hot spots). These hot spots, which are high in radiation level and difficult to eliminate, are the main cause of the increase in radiation level in the nuclear power plant, not only can cause high radiation dose to the maintainers in the vicinity of the hot spots, but also can cause considerable dose accumulation to other staff passing through the area near the hot spots, thereby increasing the overall collective dose of the nuclear power plant.

At present, a mode of putting a lead sheet on a scaffold is mainly adopted in a nuclear power plant to carry out radiation shielding on radioactive hot spots, but in practical application, the difficulty in effectively implementing radiation shielding measures is high for radioactive hot spots beside system equipment at a certain height from the ground, particularly near the wall, and the main reason is that the current shielding mode has certain limitation and is difficult to meet the requirements on safety of the system equipment, convenience in operation, reduction of radiation dose of operators and the like. The method is embodied in the following three aspects: the method comprises the following steps that (1) a shielding mode that a shielding material directly covers a hot spot is adopted, the operation difficulty is high, the shielding material is usually fixed by winding a binding band around the shielding material, but the shielding material is generally heavy and is usually difficult to fix, hot spot equipment can be pressed due to self weight, the safety of a nuclear power plant process system is affected, and certain potential safety hazards exist; secondly, a mode of erecting a scaffold as a support and then hanging a shielding material is adopted, so that the load on an equipment pipeline can be avoided, but the operation time is long, the effectiveness is poor, the radiation dosage received by an operator is large, a large space is occupied, the temporary dismantling and the reinstallation are inconvenient if the operation is needed, and in addition, the erection of the scaffold is difficult to realize due to the narrow operation space; the shielding body material that (III) adopted is the general soft lead skin of power plant, sets up the scaffold frame as the support frame, because the condition of local deformation can appear after the soft lead screen hangs for a long time, can appear some clearances between the shielding body, causes shielding performance to descend.

In order to effectively solve the problem of shielding the radioactive hot spots of the nuclear power plant and better apply radiation shielding facilities, starting from the requirement of optimal management of radiation protection of a power station, a set of radiation shielding devices which can meet the radiation protection requirement on shielding performance, can obviously reduce the radiation dose to operators and have safety and stability are needed to be designed and manufactured.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a movable rail type screen wind radiation shielding device, which is used for solving the problem of shielding radioactive radiation hot spots in the operation or maintenance activities of a nuclear power plant, reducing the radiation dose to operators and improving the safety, stability and convenience of the shielding device in the use process.

To achieve this object, the present invention provides a movable rail-type screen radiation shielding device, comprising an integral frame, a guide rail, a slider, a hoisting upper part, a hoisting lower part, a sliding screen module, and universal wheels, wherein:

the sliding screen module is made of stainless steel wrapped outside a No. 1 lead material;

the integral frame comprises an upper integral frame and a lower integral frame, and the sliding block can be slidably arranged on a guide rail fixedly arranged on the upper surface of the inner frame of the upper integral frame and the lower integral frame; the upper hoisting part is fixedly arranged on the sliding block, and the lower hoisting part matched with the upper hoisting part is fixedly connected with the upper hoisting part; the lower end of the sliding screen module is arranged in a guide rail fixedly arranged on the lower surface of the inner frame of the upper integral frame or the lower integral frame, and the upper end of the sliding screen module is fixedly arranged with the lower hoisting part; the universal wheels are arranged at the bottom of the lower integral frame.

Further, the device still includes landing leg locating part, bottom landing leg, bottom stabilizer blade, landing leg locating part stiff end passes through locating pin, fixing bolt and the frame bottom be assembled between/be connected between of lower part overall framework, the bottom landing leg removes the end with the landing leg locating part and is connected, bottom stabilizer blade and bottom landing leg fixed connection, along with the rotation that the end was removed to the landing leg locating part, the bottom stabilizer blade expandes and makes overall framework form the self-stabilizing frame structure in the holding surface.

Furthermore, the device also comprises wall supporting legs and a rotating part, wherein the rotating part rotates on a plane perpendicular to the whole frame and is fixedly connected with the wall through the wall supporting legs.

Further, the guide rails are fixedly arranged on the upper surface and the lower surface of the inner frames of the upper integral frame and the lower integral frame through screw assemblies; the hoisting upper parts are fixedly arranged on the corresponding sliding blocks through screws, and the matched hoisting lower parts are fixedly connected with the hoisting upper parts through screw assemblies; the screw assembly comprises an inner hexagonal socket head screw, a spring pad, a flat pad and a hexagon nut.

Furthermore, the upper end of each sliding screen module is fixedly installed and connected with the two hoisting lower parts through screw fittings, and the screw fittings comprise hexagon socket head cap screws, spring pads and flat pads.

Further, the sliding screen module is a standard product, and the equivalent lead equivalent is 2 cm; the thickness of the sliding screen module is adjusted by superposition installation and use so as to meet the requirement of on-site shielding; the two sides of the sliding screen module are provided with portable handles.

Furthermore, the universal wheel is a self-locking universal wheel.

Further, the sliding screen module is installed only in the upper integrated frame or only in the lower integrated frame depending on the hotspot height position and shielding range.

Furthermore, the integral frames are combined and connected into a linear type assembly in a hinge connection mode so as to shield the required hot spot range.

Furthermore, the whole frames are combined and connected in a wall surface supporting leg, a rotating component and/or a hinge connection mode to construct movable rail type screen radiation shielding device assemblies of L-shaped assemblies, U-shaped assemblies and mouth-shaped assemblies with various included angles.

The movable rail type screen radiation shielding device has the beneficial effects that the sliding screen module can be slidably arranged in the integral frame with the self-locking universal wheels through the guide rail, the sliding block, the upper hoisting part and the lower hoisting part. The sliding screen module is a standard product, has an equivalent lead equivalent of 2cm, has a shielding thickness about equal to the thickness of soft lead skins commonly used in 4 nuclear power plants, has shielding performance 3 times that of a half-value layer of Cs-137 gamma rays (0.662Mev), is sealed and wrapped by stainless steel, effectively avoids the environmental problem caused by lead leakage, is easy to install, does not deform, and can be freely selected and matched; the portable handles are arranged on the two sides, so that the carrying and the operation of personnel are facilitated, the operation is convenient and fast, the safety and the stability are strong, and the shielding performance is effectively improved; the thickness can be adjusted by superposing more than 2 sliding screen modules for combined use so as to meet the requirement of field shielding. In addition, the supporting leg limiting part, the bottom supporting leg and the bottom supporting leg which are arranged at the bottom of the integral frame are matched for use, so that the integral frame forms a self-stabilizing frame type structure, the shielding device is effectively prevented from being in direct contact with hot spot equipment, and the load safety influence on system equipment can be avoided. Meanwhile, when the hot spot range needing shielding is large, the wall surface supporting legs and the rotating parts which are arranged on the left side frame and the right side frame of the integral frame and can rotate in the plane perpendicular to the integral frame can be combined and connected by combining the hinge connection mode to construct a shielding assembly with various types such as a linear assembly, an L-shaped assembly with various included angles, a U-shaped assembly, a mouth-shaped assembly and the like by the integral frames of the movable rail type shielding wind radiation shielding device.

Drawings

Fig. 1 is a schematic view of a movable rail-type screen radiation shielding device provided by the present invention.

Fig. 2 is a schematic view of a single sliding screen module provided by the present invention.

Fig. 3 is a schematic view of the overall frame of the movable rail-type screen radiation shielding device provided by the invention.

Fig. 4 is a three-dimensional view of the slider provided by the present invention.

Fig. 5 is a front view of a linear assembly of two shielding devices provided by the present invention.

Fig. 6 is a top view of an L-shaped assembly, a U-shaped assembly and a mouth-shaped assembly with various included angles, which are constructed by combining two or three or four sets of shielding devices provided by the invention.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

As shown in fig. 1-6, the movable rail type screen radiation shielding device of the present invention comprises 1 integral frame, 2 wall legs, 2 rotating parts, 24 upper hoisting parts, 24 lower hoisting parts, 12 sliding screen modules, 2 leg position limiting parts, 4 bottom legs, 4 sliding rails, 24 sliding blocks, 2 universal wheels of 4 inches, and a plurality of accessories for installation and fixation; wherein:

as shown in fig. 2, the movable rail type screen radiation shielding device mainly shields radiation through the sliding screen module 16, and the sliding screen module 16 is made of stainless steel wrapped outside 1# lead material, so that the environmental problem caused by lead leakage is effectively avoided; the sliding screen modules 16 are standard products, can be freely selected and matched, and are provided with portable handles at two sides, so that the carrying and the operation of personnel are convenient, each sliding screen module 16 is equivalent to 2cm of lead equivalent, and the shielding performance is 3 times of half-value layer of Cs-137 gamma rays (0.662 Mev).

The sliding screen module 16 is slidably mounted in a one-piece frame 1, the one-piece frame 1 shown in fig. 3 being composed of an upper one-piece frame and a lower one-piece frame. As shown in fig. 1, the integral frame 1 is designed by a self-stabilizing frame structure, 2 4-inch self-locking universal wheels 7, 4 leg position-limiting members 8, 4 bottom legs 9 and 4 bottom legs 10 are mounted at the bottom of the lower integral frame, the fixed end of each leg position-limiting member 8 is connected with the bottom of the outer frame of the lower integral frame by a positioning pin 17 and a fixing bolt 18, so that the bottom leg 9 connected with the moving end of the leg position-limiting member 8 by screwing can rotate in the supporting surface by taking the fixed end of the leg position-limiting member 8 as an axis, the bottom leg 10 is fixedly connected with the matched external thread on the bottom leg 9 by an internal thread, the included angle between the bottom leg 9 and the integral frame 1 can be adjusted, and the supporting heights of the 4 bottom legs 9 are consistent by adjusting the screwing connection positions of the external thread on the bottom leg 9 and the internal thread on the leg position-limiting member 8, therefore, the whole frame 1 forms a self-stabilizing frame type structure, the direct contact between the shielding device and the hotspot equipment is effectively avoided, and the load safety influence on the system equipment is avoided. When the whole frame 1 is to be moved, the connection position of the external threads on the bottom supporting legs 9 and the internal threads of the supporting leg limiting pieces 8 can be adjusted to enable the 4 bottom supporting legs 10 to leave the supporting surface, and the moving end of the supporting leg limiting pieces 8 is rotated to enable the 4 bottom supporting legs 9 and the 4 bottom supporting legs 10 to be retracted to the bottom of the whole frame 1.

As shown in fig. 1, the guide rails 4 are installed on both the upper and lower surfaces of the inner frame of the upper integrated frame by M3 screw assemblies 12, and the M3 screw assembly 12 includes M3 × 16 socket head cap screws, M3 spring washers, M3 flat washers, and M3 hexagon nuts. 12 sliding blocks 5 are slidably arranged on a guide rail 4 arranged on the upper surface of the inner frame of the upper integral frame, and the sliding blocks 5 can slide left and right along the guide rail 4; 12 hoisting upper parts 14 are fixedly arranged on corresponding sliding blocks 5 through M3 multiplied by 10 hexagon socket head cap screws 6, 12 hoisting lower parts 15 matched with the hoisting upper parts 14 are fixedly connected with the M5 screw assembly 11, and the M5 screw assembly 11 comprises M5 multiplied by 10 hexagon socket head cap screws, an M5 spring pad, an M5 flat pad and an M5 hexagon nut. The lower ends of 6 sliding screen modules 16 are arranged in the guide rails 4 arranged on the lower surface of the inner frame of the upper integral frame, the upper end of each sliding screen module 16 is fixedly arranged with the two hoisting lower parts 15 through M4 screw fittings 13, and the M4 screw fittings 13 comprise M4 x 35 hexagon socket head cap screws, M4 spring pads and M4 flat pads. The left and right sides of the upper integral frame are respectively provided with 1 wall supporting leg 2 and 1 rotating part 3 which can rotate in the plane vertical to the integral frame, and the upper integral frame can be used for being fixedly connected with the wall or being combined and connected with the two sides of a plurality of integral frames 1 and being extended to be installed into different shapes so as to adapt to different hot spot application requirements.

Similarly, the guide rails 4 are installed on the upper and lower surfaces of the inner frame of the lower integrated frame through M3 screw assemblies 12, and the M3 screw assemblies 12 include M3 × 16 socket head cap screws, M3 spring washers, M3 flat washers, and M3 hexagon nuts. 12 sliding blocks 5 are slidably arranged on a guide rail 4 arranged on the upper surface of an inner frame of the lower integral frame, and the sliding blocks 5 can slide left and right along the guide rail 4; 12 hoisting upper parts 14 are fixedly arranged on corresponding sliding blocks 5 through M3 multiplied by 10 hexagon socket head cap screws 6, 12 hoisting lower parts 15 matched with the hoisting upper parts 14 are fixedly connected with the M5 screw assembly 11, and the M5 screw assembly 11 comprises M5 multiplied by 10 hexagon socket head cap screws, an M5 spring pad, an M5 flat pad and an M5 hexagon nut. The lower ends of 6 sliding screen modules 16 are arranged in the guide rails 4 arranged on the lower surface of the inner frame of the lower integral frame, the upper end of each sliding screen module 16 is fixedly arranged with the two hoisting lower parts 15 through M4 screw fittings 13, and the M4 screw fittings 13 comprise M4 x 35 hexagon socket head cap screws, M4 spring pads and M4 flat pads.

The integral frame 1 of the movable rail type screen radiation shielding device can be selected to be only provided with the sliding screen module 16 on the upper integral frame or in the lower integral frame according to the height position and the shielding range of a hot spot, can meet the construction requirements of shielding walls in various regions, and has better universality and flexibility; the inspection or maintenance of hot spot equipment can be realized under the condition that the shielding device is not removed, and the window can be opened and closed by moving the sliding screen module 16, so that the implementation of field work is facilitated. In addition, the thickness can be adjusted by superposing more than 2 sliding screen modules 16 for combined installation and use so as to meet the requirement of field shielding. The operation difficulty is low, and operating personnel can be skillfully master the use requirement through simple training. The efficiency of implementing the radiation shielding work can be improved without other professional cooperation works.

When the hot spot range needing shielding is large, the integral frames 1 of the movable rail type wind shielding radiation shielding devices can be combined and connected into a linear type assembly as shown in fig. 5 in a hinge connection mode; and the wall surface supporting legs 2 and the rotating components 3 which are arranged on the left side frame and the right side frame of the upper integral frame and can rotate in the plane vertical to the integral frame can be combined and connected with the wall surface supporting legs 2 and the rotating components 3 on the upper integral frame of another set of device for use, so that shielding combination bodies with various types such as L-shaped combination bodies, U-shaped combination diagrams, mouth-shaped combination bodies and the like with various included angles shown in figure 6 can be constructed.

After being fully loaded, the movable rail type screen wind radiation shielding device of the embodiment is not lower than the requirement of 6-level earthquake fortification intensity through earthquake stability analysis. Moreover, the movable rail type screen wind radiation shielding device is small in workload and short in operation time required by installation and removal, relevant inspection and maintenance work can be carried out without removal, and the irradiated dose of workers can be remarkably reduced.

The above-described embodiments are merely illustrative of the present invention, and those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.