Radiation shielding device and processing machine tool

Abstract

The utility model relates to a radiation shielding device and a processing machine tool, the radiation shielding device comprises a shell and a plurality of shielding rings, and the shell is internally provided with a containing cavity; the plurality of shielding rings are arranged in the accommodating cavity; the plurality of shielding rings are arranged in sequence from the shell to the direction close to the center of the accommodating cavity; in every two adjacent shielding rings, the shielding ring close to the shell is arranged on the outer side of the shielding ring far away from the shell in a sleeving mode. According to the radiation shielding device and the machining tool, the radiation influence on workers in the machining process of the to-be-machined part can be reduced, and the machining efficiency and machining safety of the to-be-machined part are improved.

Description

Technical Field

[0001] The present application relates to the field of nuclear power technology, and in particular to a radiation shielding device and a processing machine tool. Background Art

[0002] The nuclear main pump is a pump in the primary loop system of the nuclear island, used to drive the coolant to circulate in the RCP (reactor coolant system) system. The main pump is located in the heart of the nuclear island, used to pump hot water into the evaporator to convert heat energy, and is the key to controlling the water circulation of nuclear power operation. Since the main pump runs in the primary loop system of the nuclear island, the nuclear radiation dose rate on the main pump is relatively high, which seriously threatens the life safety of the staff when the main pump is maintained and replaced. Therefore, when the main pump is maintained and replaced, some structures need to be decontaminated, and the next step of processing can be carried out only after the decontamination meets the standards.

[0003] In the relevant technology, the impeller is the main component structure of the nuclear main pump. After multiple chemical or physical decontamination of the impeller, the radiation dose rate of the impeller is still relatively large, and the maximum can reach 14msv / h. Among them, the radiation dose rate at the impeller hub T is still 2.7msv / h. Under this radiation dose rate, the radiation dose rate borne by the workers during the processing will soon reach 1msv / h, reaching the daily limit of radiation dose, seriously affecting the maintenance efficiency of the main pump. Utility Model Content

[0004] Based on this, it is necessary to provide a radiation shielding device and a processing machine tool, aiming to reduce the radiation impact on workers during the processing of the workpiece to be processed and improve the processing efficiency and processing safety of the workpiece to be processed.

[0005] An embodiment of the first aspect of the present application provides a radiation shielding device, which includes a shell and a plurality of shielding rings, wherein the shell has a accommodating cavity, the accommodating cavity is used to accommodate a component to be shielded; a plurality of shielding rings are arranged in the accommodating cavity, the shielding rings are used to shield radiation emitted by the component to be shielded, and the shell is used to fix the shielding rings; the plurality of shielding rings are arranged in sequence along a first direction, the first direction is a direction from the shell to a direction close to the center of the accommodating cavity, and of two shielding rings adjacent to each other along the first direction, the shielding ring close to the shell is sleeved on the outside of the shielding ring away from the shell.

[0006] In the embodiment of the present application, the shielding ring is fixed by the shell so that the inner wall of the shielding ring fits tightly with the outer wall of the workpiece to be processed, thereby realizing the connection between the shielding ring and the workpiece to be processed. The shielding ring is arranged on the surface of the workpiece to be processed with radiation, and the shielding ring can shield the radiation emitted outward by the workpiece to be processed, reduce the radiation exposure to the workers during the processing, thereby extending the processing time of the workpiece to be processed, and improving the processing efficiency and processing safety of the workpiece to be processed.

[0007] In some embodiments, along the axial direction of the shielding ring, each of the shielding rings includes a plurality of sub-shielding rings connected in sequence.

[0008] In some embodiments, along the circumference of the shielding ring, each of the shielding rings includes a plurality of sub-shielding parts connected in sequence.

[0009] In some embodiments, the shell is cylindrical, and along the axial direction of the shell, the shell includes a plurality of sub-shells that are spaced apart.

[0010] In some embodiments, the shell is cylindrical, and along the axial direction of the shell, the shell includes a plurality of sub-shells connected in sequence.

[0011] In some embodiments, the shell is cylindrical, and along the circumference of the shell, the shell includes a plurality of sub-shell parts connected in sequence.

[0012] In some embodiments, the shell is provided with a plurality of first through holes, the shielding ring is provided with a plurality of second through holes corresponding to the first through holes, and the radiation shielding device also includes a first fastener, which is passed through the first through hole and the second through hole.

[0013] In some embodiments, the two sides where the sub-shell portion is connected to the adjacent sub-shell portion are bent in a direction away from the accommodating cavity to form a first flange, and a third through hole is provided on the first flange. The radiation shielding device also includes a second fastener, and the second fastener is passed through the third through hole adjacent to the first flange.

[0014] In some embodiments, along the circumference of the shielding ring, each of the shielding rings includes a plurality of sub-shielding parts connected in sequence, and the shell includes a plurality of sub-shell parts connected in sequence; the two sides of the sub-shell parts connected to the adjacent sub-shell parts are bent along a direction away from the accommodating cavity to form a first flange, and a third through hole is provided on the first flange; the two sides of the sub-shielding parts connected to the adjacent sub-shielding parts are bent along a direction away from the accommodating cavity to form a second flange, and a fourth through hole is provided on the second flange; the second flanges of adjacent sub-shielding parts are located between the first flanges of adjacent sub-shell parts; the radiation shielding device also includes a second fastener, and the second fastener is passed through the third through hole and the fourth through hole.

[0015] An embodiment of the second aspect of the present application provides a processing machine tool, comprising the radiation shielding device in any of the above embodiments.

[0016] In the radiation shielding device included in the processing machine provided in the embodiment of the present application, the shielding ring is limited and fixed by the shell, so that the inner wall of the shielding ring is closely fitted with the outer wall of the workpiece to be processed, thereby realizing the connection between the shielding ring and the workpiece to be processed. The shielding ring is arranged on the surface of the workpiece to be processed with radiation, and the shielding ring can shield the radiation emitted outward by the workpiece to be processed, reduce the radiation to which the workers are subjected during the processing, thereby extending the processing time of the workpiece to be processed, and improving the processing efficiency and processing safety of the workpiece to be processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of a radiation shielding device in one embodiment of the present application;

[0018] Figure 2 is a top view of a radiation shielding device in one embodiment of the present application;

[0019] Figure 3 It is a schematic diagram of a partial structure of a radiation shielding device in one embodiment of the present application;

[0020] Figure 4 It is a schematic diagram of the structure of a shielding ring in an embodiment of the present application;

[0021] Figure 5 It is a schematic structural diagram of a shielding ring in another embodiment of the present application;

[0022] Figure 6 This is a schematic structural diagram of a shielding ring in another embodiment of the present application;

[0023] Figure 7 is a schematic structural diagram of a radiation shielding device in one embodiment of the present application;

[0024] Figure 8 It is a structural schematic diagram of a housing in an embodiment of the present application;

[0025] Fig. 9 It is a structural schematic diagram of a processing machine tool in one embodiment of the present application;

[0026] Fig.10 It is a structural schematic diagram of a processing machine tool in another embodiment of the present application;

[0027] Fig.11 It is a structural schematic diagram of a processing machine tool in another embodiment of the present application;

[0028] Figure numerals: radiation shielding device-100, shell-1, sub-shell-11, sub-shell part-12, first through hole-13, first flange-14, third through hole-15, shielding ring-2, sub-shielding ring-21, sub-shielding part-22, second through hole-23, second flange-24, fourth through hole-25, first fastener-3, second fastener-4, processing machine tool-200, workpiece to be processed-300, first direction-X. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] When describing positional relationships, unless otherwise specified, when an element such as a layer, film, or substrate is referred to as being "on" another element, it can be directly on the other element or there may be intervening elements. Further, when a layer is referred to as being "under" another layer, it can be directly under or there may be one or more intervening elements. It is also understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or there may be one or more intervening elements.

[0032] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0033] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present application.

[0034] It should also be understood that when interpreting an element, even if not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of the specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" can mean within one or more standard deviations, which are not limited here.

[0035] Furthermore, in the specification, the phrase “planar distribution schematic diagram” refers to a drawing when a target portion is viewed from above, and the phrase “cross-sectional schematic diagram” refers to a drawing when a section taken by vertically cutting the target portion is viewed from the side.

[0036] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0037] The nuclear main pump is a pump in the primary loop system of the nuclear island, used to drive the coolant to circulate in the RCP (reactor coolant system) system. The main pump is located in the heart of the nuclear island, used to pump hot water into the evaporator to convert heat energy, and is the key to controlling the water circulation of nuclear power operation. Since the main pump runs in the primary loop system of the nuclear island, the nuclear radiation dose rate on the main pump is relatively high, which seriously threatens the life safety of the staff when processing and replacing the main pump. Therefore, when processing and replacing the main pump, some structures need to be decontaminated, and the next step of processing can only be carried out after the decontamination meets the standards.

[0038] In the relevant technology, the impeller is the main component structure of the nuclear main pump. After multiple chemical or physical decontamination of the impeller, the radiation dose rate of the impeller is still relatively large, and the maximum can reach 14msv / h. Among them, the radiation dose rate at the impeller hub T is still 2.7msv / h. Under this radiation dose rate, the radiation dose rate borne by the workers during the processing will soon reach 1msv / h, reaching the daily limit of radiation dose, seriously affecting the main pump processing efficiency.

[0039] Based on the above problems, the present application provides a radiation shielding device and a processing machine tool, which can reduce the radiation impact on workers during the processing of the workpiece to be processed, and improve the processing efficiency and processing safety of the workpiece to be processed.

[0040] The embodiment of the first aspect of the present application provides a radiation shielding device 100, such as Figures 1 to 3As shown, the radiation shielding device 100 includes a housing 1 and a plurality of shielding rings 2. The housing 1 has a receiving cavity, which is used to receive the shielded component. The plurality of shielding rings 2 are arranged in the receiving cavity, and the shielding rings 2 are used to shield the radiation emitted by the shielded component. The housing 1 is used to fix the shielding rings 2. The plurality of shielding rings 2 are arranged in sequence along a first direction X, and the first direction X is a direction from the housing 1 to a direction close to the center of the receiving cavity. In two shielding rings 2 arranged adjacent to each other along the first direction X, the shielding ring 2 close to the housing 1 is sleeved on the outer side of the shielding ring 2 far from the housing 1. The first direction X may be a radial direction of the shielding ring 2.

[0041] In the present application embodiment, Figures 1 to 3 As shown, the shell 1 can be used as a fixed carrier of the shielding ring 2. The shielding ring 2 has good shielding properties and can shield the radiation generated by the workpiece 300 to be processed. The shielding ring 2 is limited and fixed by the shell 1, so that the inner wall of the shielding ring 2 is closely fitted with the outer wall of the workpiece 300 to be processed, thereby realizing the connection between the shielding ring 2 and the workpiece 300 to be processed. A plurality of shielding rings 2 are arranged in sequence from the inside to the outside on the surface of the workpiece 300 to be processed with radiation. The shielding ring 2 can shield the radiation emitted from the workpiece 300 to the outside, reduce the radiation to which the workers are subjected during the processing, thereby extending the processing time of the workpiece to be processed, and improving the processing efficiency and processing safety of the workpiece 300 to be processed.

[0042] In the embodiment of the present application, the workpiece 300 to be processed can be a main pump, specifically, the workpiece 300 to be processed can be an impeller in the main pump, and the radiation shielding device 100 can be sleeved on the outer wall of the hub of the impeller. The material of the housing 1 includes stainless steel, and the material of the shielding ring 2 includes but is not limited to lead, nickel alloy and carbon-based alloy, so that the shielding ring 2 has good shielding properties.

[0043] In the embodiment of the present application, the number and thickness of the shielding rings 2 can be set according to the radiation dose rate on the workpiece 300 to be processed, so as to reduce the radiation dose applied to the workers by the workpiece 300 to be processed. Under the condition of ensuring the processing safety of the workpiece 300 to be processed, the flexibility of the workpiece 300 to be processed can be adaptively adjusted during the processing to improve the processing efficiency. Specifically, when the radiation dose rate of the workpiece 300 to be processed is high, the number and / or thickness of the shielding rings 2 can be increased, and when the radiation dose rate of the workpiece 300 to be processed is low, the number and / or thickness of the shielding rings 2 can be reduced. Along the radial direction of the shielding ring 2, the thickness of the shell 1 can be greater than 1 mm and less than or equal to 3 mm, for example, the thickness of the shell 1 can be 2 mm or 2.5 mm. Along the radial direction of the shielding ring 2, the thickness of a single shielding ring 2 can be greater than or equal to 3 mm and less than or equal to 7 mm, for example, the thickness of a single shielding ring 2 can be 5 mm. In an example, the radiation shielding device 100 may include six shielding rings 2 stacked along the first direction X and having a thickness of 5 mm, or may include only one shielding ring 2 having a thickness of 30 mm, which is not limited in the present application.

[0044] In some embodiments, along the axial direction of the shielding ring 2, such as Figure 4 As shown, each shielding ring 2 includes a plurality of sub-shielding rings 21 connected in sequence. The sizes of the plurality of sub-shielding rings 21 may be the same or different, and may be set according to the size of the workpiece 300 to be processed, and the present application does not limit this. When connecting the shielding ring 2 to the workpiece 300 to be processed, the plurality of sub-shielding rings 21 may be connected to form a shielding ring 2 and then installed with the workpiece 300 to be processed, or the plurality of sub-shielding rings 21 may be installed in sequence on the surface of the workpiece 300 to be processed. Splitting a shielding ring 2 into a plurality of sub-shielding rings 21 can reduce the space occupied by the shielding ring 2 and facilitate the storage and transportation of the shielding ring 2.

[0045] In some embodiments, in two adjacent shielding rings 2, the sub-shielding rings 21 close to the shell 1 are arranged alternately with the sub-shielding rings 21 far from the shell 1, that is, the connecting gaps of the adjacent sub-shielding rings 21 closer to the shell 1 and the connecting gaps of the adjacent sub-shielding rings 21 far from the shell 1 are arranged alternately, so as to avoid the radiation emitted by the workpiece 300 from being transmitted through the connecting gaps of the sub-shielding rings 21, thereby improving the processing safety of the workpiece 300. Optionally, the shielding ring 2 close to the shell 1 can also be split into multiple sub-shielding rings 21, and the shielding ring 2 far from the shell 1 is still an integrated structure. The arrangement form of the multiple shielding rings 2 can be set according to actual needs, and this application does not limit this.

[0046] In some embodiments, Figure 5As shown, along the circumference of the shielding ring 2, each shielding ring 2 includes a plurality of sub-shielding parts 22 connected in sequence. The shielding ring 2 can be formed by splicing a plurality of sub-shielding parts 22, and the sizes of the plurality of sub-shielding parts 22 can be the same. Splitting a shielding ring 2 into a plurality of sub-shielding parts 22 can reduce the space occupied by the shielding ring 2, and facilitate the storage and transportation of the shielding ring 2.

[0047] In some embodiments, Figure 6 As shown, in two adjacent shielding rings 2, the sub-shielding parts 22 close to the shell 1 are arranged alternately with the sub-shielding parts 22 far from the shell 1, that is, the connecting gaps of the adjacent sub-shielding parts 22 closer to the shell 1 and the connecting gaps of the adjacent sub-shielding parts 22 far from the shell 1 are arranged alternately, so as to avoid the radiation emitted by the workpiece 300 from being transmitted through the connecting gaps of the sub-shielding parts 22, thereby improving the processing safety of the workpiece 300. Optionally, the shielding ring 2 close to the shell 1 can also be split into multiple sub-shielding parts 22, and the shielding ring 2 far from the shell 1 is still an integrated structure. The arrangement form of the multiple shielding rings 2 can be set according to actual needs, and this application does not limit this.

[0048] In some embodiments, Figure 7 As shown, the housing 1 is cylindrical, and along the axial direction of the housing 1, the housing 1 includes a plurality of sub-housings 11 arranged at intervals. The housing 1 can be cylindrical, square or conical. The sizes of the plurality of sub-housings 11 can be the same or different, and can be set according to the size of the workpiece 300 to be processed, which is not limited in this application. In one example, as Figure 7 As shown, the housing 1 may include two sub-housings 11 that are spaced apart from each other. The two sub-housings 11 are respectively disposed at the head and tail ends of the shielding ring 2 to fix the shielding ring 2 to the workpiece 300 to be processed.

[0049] In the embodiment of the present application, the shell 1 includes a plurality of sub-shells 11 arranged at intervals, which can not only reduce the space occupied by the shell 1 and facilitate the storage and transportation of the shell 1, but also reduce the materials consumed in preparing the shell 1 while ensuring the shielding performance of the radiation shielding device 100, thereby reducing the preparation cost of the radiation shielding device 100.

[0050] In some embodiments, the housing 1 is cylindrical, and along the axial direction of the housing 1, the housing 1 includes a plurality of sub-housings 11 connected in sequence. The sizes of the plurality of sub-housings 11 may be the same or different, and may be set according to the size of the workpiece 300 to be processed, and the present application does not limit this. Splitting a housing 1 into a plurality of sub-housings 11 can reduce the space occupied by the housing 1, and facilitate the storage and transportation of the housing 1.

[0051] In some embodiments, the shell 1 is cylindrical, and along the circumference of the shell 1 , each sub-shell 11 includes a plurality of sub-shell portions connected in sequence, which can reduce the space occupied by the sub-shell 11 and facilitate storage and transportation of the sub-shell 11 .

[0052] In some embodiments, Figure 8 As shown, the shell 1 is cylindrical, and along the circumference of the shell 1, the shell 1 includes a plurality of sub-shell parts 12 connected in sequence. The shell 1 can be formed by splicing a plurality of sub-shell parts 12, and the sizes of the plurality of sub-shell parts 12 can be the same. Splitting a shell 1 into a plurality of sub-shell parts 12 can reduce the occupied space of the shell 1 and facilitate the storage and transportation of the shell 1. In some examples, the shell 1 can include two symmetrically arranged sub-shell parts 12, and the structure of the shell 1 is similar to a hoop.

[0053] In some embodiments, the radiation shielding device 100 may include a shielding ring 2 composed of multiple sub-shielding parts 22 and a shell 1 composed of multiple sub-shells 11, or it may include a shielding ring 2 composed of multiple sub-shielding rings 21 and a shell 1 composed of multiple sub-shell parts 12. The composition structure of the shielding ring 2 and the shell 1 can be set according to actual needs, and this application does not limit this.

[0054] In some embodiments, Figure 1 and Figure 3 As shown, the housing 1 is provided with a plurality of first through holes 13, the shielding ring 2 is provided with a plurality of second through holes 23 corresponding to the first through holes 13, the plurality of first through holes 13 and the second through holes 23 are evenly arranged, and the radiation shielding device 100 further comprises a first fastener 3, which is passed through the first through holes 13 and the second through holes 23. The first fastener 3 includes but is not limited to a threaded fastener, such as a screw, a bolt, etc. The fastening of the housing 1 and the shielding ring 2 by the first fastener 3 can improve the connection stability of the housing 1 and the shielding ring 2, improve the reliability of the radiation shielding device 100, and the connection method is simple and convenient.

[0055] In some embodiments, there is at least a partial recessed area on the surface of the workpiece 300. In this case, the first through hole 13 and the second through hole 23 can be correspondingly arranged in the recessed area, so that the first fastener 3 passing through the first through hole 13 and the second through hole 23 is placed in the recessed area close to the side of the workpiece 300 to be processed, so as to avoid the first fastener 3 scratching the workpiece 300 or causing the surface of the workpiece 300 to be processed to be worn during the processing, thereby ensuring the reliability of the workpiece 300.

[0056] In some embodiments, Figure 1As shown, the two sides of the sub-shell part 12 connected to the adjacent sub-shell part 12 are bent in the direction away from the accommodating cavity to form a first flange 14, and a third through hole 15 is provided on the first flange 14. The radiation shielding device 100 also includes a second fastener 4, and the second fastener 4 is penetrated in the third through hole 15 of the adjacent first flange 14. The fastening connection of the adjacent first flanges 14 is achieved by the second fastener 4, thereby achieving the fastening connection of the adjacent sub-shell parts 12. The connection method is simple and convenient, which can not only improve the connection stability of the adjacent sub-shell parts 12 and improve the reliability of the housing 1, but also can adjust the size of the housing 1 by adjusting the position of the second fastener 4, so that the housing 1 is convenient to fasten the shielding ring 2.

[0057] In some embodiments, along the circumference of the shielding ring 2, each shielding ring 2 includes a plurality of sub-shielding parts 22 connected in sequence, and the housing 1 includes a plurality of sub-shell parts 12 connected in sequence; the two sides of the sub-shell part 12 connected to the adjacent sub-shell part 12 are bent in a direction away from the accommodating cavity to form a first flange 14, and the first flange 14 is provided with a third through hole 15; the two sides of the sub-shielding part 22 connected to the adjacent sub-shielding part 22 are bent in a direction away from the accommodating cavity to form a second flange 24, and the second flange 24 is provided with a fourth through hole 25; the second flange 24 of the adjacent sub-shielding part 22 is located between the first flange 14 of the adjacent sub-shell part 12; the radiation shielding device 100 also includes a second fastener 4, and the second fastener 4 is inserted into the fourth through hole 25 and the third through hole 15. The splicing of the shielding ring 2 of the housing 1 and the connection of the radiation shielding device 100 with the workpiece 300 are realized by the second fastener 4, and the connection method is simple and convenient, which can improve the installation stability of the radiation shielding device 100 and ensure the shielding effect of the radiation shielding device 100.

[0058] An embodiment of the second aspect of the present application provides a processing machine 200, comprising the radiation shielding device 100 in any of the above embodiments.

[0059] In the embodiment of the present application, the processing bed 200 also includes structures such as a machine tool body, a fixture, a tool and a grinding tool, and the radiation shielding device 100 can be used as a similar accessory in combination with structures such as a fixture. After the radiation shielding device 100 is fixedly connected to the workpiece 300 to be processed, the workpiece 300 to be processed with the radiation shielding device 100 is fixed on the machine tool body by a fixture, and then the staff cuts / grinds the workpiece 300 to be processed by structures such as a tool and a grinding tool. The shielding ring 2 is limited and fixed by the shell 1, so that the inner wall of the shielding ring 2 is closely fitted with the outer wall of the workpiece 300 to be processed, and the shielding ring 2 is connected to the workpiece 300 to be processed. The shielding ring 2 is set on the surface of the workpiece 300 to be processed with radiation, and the shielding ring 2 can shield the radiation emitted outward by the workpiece 300 to be processed, reduce the radiation to which the staff bears during the processing, thereby extending the processing time of the workpiece 300 to be processed, and improving the processing efficiency and processing safety of the workpiece 300 to be processed.

[0060] In the present application embodiment, Figures 9 to 11 As shown, the processing machine 200 includes but is not limited to a horizontal CNC lathe, a vertical CNC lathe and a CNC floor-standing milling and boring machine. Fig. 9 The figure is a schematic diagram of assembling an impeller equipped with a radiation shielding device 100 and a horizontal CNC lathe, and the axial end face and inner hole of the impeller can be processed. Fig.10 FIG. 1 is a schematic diagram of assembling an impeller equipped with a radiation shielding device 100 and a vertical CNC lathe. Fig.11 The diagram is a schematic diagram of assembling an impeller equipped with the radiation shielding device 100 and a CNC floor-standing milling and boring machine. The keyway of the impeller can be repaired and processed.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A radiation shielding device, characterized in that: include: A housing, wherein the housing has a housing cavity, and the housing cavity is used to accommodate the shielded component; A plurality of shielding rings are arranged in the accommodating cavity, the shielding rings are used to shield the radiation emitted by the shielded component, and the shell is used to fix the shielding rings; the plurality of shielding rings are arranged in sequence along a first direction, the first direction is a direction from the shell to a direction close to the center of the accommodating cavity, and in two shielding rings arranged adjacent to each other along the first direction, the shielding ring close to the shell is sleeved on the outer side of the shielding ring away from the shell.

2. The radiation shielding device according to claim 1, characterized in that Along the axial direction of the shielding ring, each of the shielding rings includes a plurality of sub-shielding rings connected in sequence.

3. The radiation shielding device according to claim 1, characterized in that Along the circumference of the shielding ring, each of the shielding rings includes a plurality of sub-shielding parts connected in sequence.

4. The radiation shielding device according to claim 1, characterized in that The shell is cylindrical and includes a plurality of sub-shells arranged at intervals along the axial direction of the shell.

5. The radiation shielding device according to claim 1, characterized in that The shell is cylindrical and includes a plurality of sub-shells connected in sequence along the axial direction of the shell.

6. The radiation shielding device according to claim 1, characterized in that The shell is cylindrical and includes a plurality of sub-shell parts connected in sequence along the circumference of the shell.

7. The radiation shielding device according to claim 1, characterized in that The shell is provided with a plurality of first through holes, the shielding ring is provided with a plurality of second through holes corresponding to the first through holes, and the radiation shielding device further comprises a first fastener, which is passed through the first through holes and the second through holes.

8. The radiation shielding device according to claim 6, characterized in that The two sides of the sub-shell portion connected to the adjacent sub-shell portion are bent in a direction away from the accommodating cavity to form a first flange, and a third through hole is provided on the first flange. The radiation shielding device also includes a second fastener, and the second fastener is inserted into the third through hole adjacent to the first flange.

9. The radiation shielding device according to claim 1, characterized in that Along the circumference of the shielding ring, each of the shielding rings includes a plurality of sub-shielding parts connected in sequence, and the shell includes a plurality of sub-shell parts connected in sequence; The two sides of the sub-shell portion connected to the adjacent sub-shell portion are bent in a direction away from the accommodating cavity to form a first flange, and a third through hole is provided on the first flange; the two sides of the sub-shielding portion connected to the adjacent sub-shielding portion are bent in a direction away from the accommodating cavity to form a second flange, and a fourth through hole is provided on the second flange; the second flanges of the adjacent sub-shielding portions are located between the first flanges of the adjacent sub-shell portions; The radiation shielding device further includes a second fastener, which is inserted into the third through hole and the fourth through hole.

10. A processing machine tool, characterized in that: Comprising the radiation shielding device according to any one of claims 1 to 9.

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