Integrated diaphragm assembly for irradiation system

Abstract

The embodiment of the utility model provides an integrated diaphragm assembly for an irradiation system. The integrated diaphragm assembly comprises a cylindrical barrel and a plurality of plate-shaped diaphragms fixedly connected to the interior of the barrel. The barrel is horizontally arranged, the plate surfaces of the diaphragms are perpendicular to the axis of the barrel, the diaphragms are arranged in parallel, and a cavity is formed between every two adjacent diaphragms; a conical diaphragm hole is formed in each diaphragm, the diaphragm holes are coaxial with the diaphragms, and the side surfaces of all the diaphragm holes are located on the same virtual cone with a small front part and a large rear part; the aperture of the cavity is larger than the large-end aperture of the diaphragm hole in front of the cavity. According to the technical scheme, the multiple diaphragms form the integrated assembly, and the assembly can be integrally machined and does not need to be assembled one by one, so that the coaxiality of the diaphragm holes is effectively guaranteed, the problem that the centers of the diaphragm holes are not aligned is solved, the assembly efficiency is improved, and the assembly precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of radioactive measurement and monitoring, in particular to a diaphragm, and more specifically, to an integrated diaphragm assembly for an irradiation system. Background Art

[0002] In the existing irradiation system, devices such as a diaphragm, an attenuator, and a shutter are sequentially arranged in front of the source container. Among them, one or more groups of diaphragms are used. Each group of diaphragms usually consists of 3 pieces arranged in parallel at a specified gap. During assembly, each diaphragm needs to be separately installed in the set position and the position needs to be adjusted after assembly to align the centers of all diaphragm holes.

[0003] In the process of implementing the present utility model, the inventor found that there are at least the following problems in the prior art:

[0004] In the prior art, since each diaphragm is independent, it is difficult to ensure a sufficiently high coaxiality even after assembly adjustment. Therefore, how to effectively improve the coaxiality of each diaphragm in the irradiation system and accurately align the centers of each diaphragm hole is a problem to be solved. Summary of the Utility Model

[0005] An embodiment of the present utility model provides an integrated diaphragm assembly for an irradiation system to solve the problem of poor coaxiality between diaphragms in the existing irradiation system.

[0006] To achieve the above object, an embodiment of the present utility model provides an integrated diaphragm assembly for an irradiation system, including a cylindrical barrel body and multiple plate-shaped diaphragms fixedly connected inside the barrel body; the barrel body is horizontally arranged, the plate surface of the diaphragm is perpendicular to the axis of the barrel body, and multiple diaphragms are arranged in parallel. A cavity is formed between every two adjacent diaphragms; a conical diaphragm hole is formed in each diaphragm, the diaphragm hole is coaxial with the diaphragm, and the side surfaces of all diaphragm holes are located on the same virtual cone with a smaller front end and a larger rear end; the aperture of the cavity is larger than the large end aperture of the diaphragm hole in front of the cavity.

[0007] Further, the cavity penetrates the upper and lower surfaces of the barrel body.

[0008] Further, the cavity is a vertically arranged long strip structure, the horizontal cross-section of the long strip structure is a rectangle, and the rectangle is symmetric about the axis of the barrel body.

[0009] Further, there are six diaphragms in total.

[0010] Further, the taper of the virtual cone is 12° or 6°.

[0011] Further, the thickness of the cavity is 20 mm; the thickness of each diaphragm is 15 mm.

[0012] Furthermore, the cylinder body is also provided with a top plane.

[0013] Furthermore, the widths of all the cavities are the same; alternatively, the widths of the cavities are different, and the widths of the cavities increase in the front-to-back direction.

[0014] The above technical solution has the following beneficial effects:

[0015] In this technical solution, multiple diaphragms and the cylinder body form an integrated component, which can be integrally processed. The relative positional relationship between the diaphragms is fixed. Therefore, there is no need to perform on-site manual assembly one by one as in the prior art, reducing the large coaxiality deviation caused by manual operation problems, effectively ensuring the coaxiality between the diaphragm holes, avoiding the problem of misalignment of the centers of the diaphragm holes, ensuring the assembly accuracy, and improving the assembly efficiency.

[0016] At the same time, this technical solution also has the following characteristics:

[0017] Since the integrated diaphragm component is provided with cavities penetrating the upper and lower surfaces of the cylinder body, and the cavities are parallel to each other, therefore, under corresponding control instructions, sheet attenuators and shutters can be inserted into the respective cavities from top to bottom, thereby arranging components such as diaphragms, attenuators, and shutters that are arranged in the front and back in the prior art in a cross manner, greatly reducing the distance from the source container to the front end face of the irradiation system, and further reducing the volume and weight of the entire irradiation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 is a schematic structural diagram of an integrated diaphragm component for an irradiation system according to an embodiment of the present invention;

[0020] Figure 2 is a schematic view in the main viewing direction of an integrated diaphragm component for an irradiation system according to an embodiment of the present invention;

[0021] Figure 3 is a schematic view in the top viewing direction of an integrated diaphragm component for an irradiation system according to an embodiment of the present invention;

[0022] Reference numerals in the drawings: 1, diaphragm hole; 2, diaphragm; 3, cavity; 4, cylinder body; 5, top plane. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] As Figure 1 , Figure 2 shown, an integrated diaphragm assembly for an irradiation system provided by an embodiment of the present invention includes a cylindrical barrel 4 and a plurality of plate-shaped diaphragms 2 fixedly connected inside the barrel 4; the barrel 4 is horizontally arranged, the plate surface of the diaphragm 2 is perpendicular to the axis of the barrel 4, and a plurality of the diaphragms 2 are arranged in parallel, and a cavity 3 is formed between every two adjacent diaphragms 2; a conical diaphragm hole 1 is formed in each diaphragm 2, the diaphragm hole 1 is coaxial with the diaphragm 2, and the side surfaces of all the diaphragm holes 1 are located on the same virtual cone with a smaller front and a larger rear; the aperture of the cavity 3 is larger than the large-end aperture of the diaphragm hole 1 in front of the cavity 3.

[0025] In this technical solution, by arranging a predetermined number of diaphragms 2 at parallel intervals inside the barrel 4 and making the gap between the diaphragms 2 a preset value that meets the regulations, an integrated component structure is formed by the plurality of diaphragms 2 and the barrel 4. This component can be processed at one time, and the relative positional relationship between the diaphragms 2 is fixed. Therefore, it is not necessary to assemble them one by one as in the prior art, effectively ensuring the coaxiality between the diaphragm holes 1 and avoiding the problem of misalignment of the centers of the diaphragm holes 1, and ensuring the assembly accuracy; and since it is not necessary to adjust each diaphragm 2 after assembly, the work efficiency is also improved. At the same time, in order not to block the diaphragm holes 1, it is necessary to make the aperture (dimensions in all directions) of each cavity 3 larger than the large-end aperture of the diaphragm hole 1 immediately in front of it. In this way, all the diaphragm holes 1 arranged in parallel can form a conical shape with a predetermined taper without occlusion, so that the rays emitted by the radiation source are emitted along the direction of the cone.

[0026] Further, the cavity 3 penetrates the upper and lower surfaces of the barrel 4.

[0027] In the prior art, the usual arrangement is that the first group (3 pieces) of diaphragms + the second group (3 pieces) of diaphragms + an attenuator (usually 3 pieces) + a shutter are arranged in sequence. Before the rays of the irradiation system emit from the system, they must pass through these components. Therefore, the length dimension of these components stacked together limits the volume of the entire irradiation system. In the present technical solution, the upper part of the cylinder 4 is made open, so that the cavity 3 is vertically penetrated. At this time, when the width and thickness dimensions of the attenuator and the shutter respectively match the cross-sectional dimensions of the cavity 3, as needed, a certain attenuator and shutter can be inserted into the corresponding cavity 3 respectively, which can also achieve the same ray attenuation or shutter blocking effect as in the prior art. At this time, since the front-back stacked arrangement is changed to a cross arrangement, the cavity 3 between the adjacent diaphragms 2 is fully utilized, so the length dimension in the axial direction of the cylinder 4 can be greatly reduced, thereby reducing the volume of the entire irradiation system, reducing the weight, and reducing the manufacturing cost.

[0028] Further, the cavity 3 is a vertically arranged long strip structure, the horizontal cross-section of the long strip structure is a rectangle, and the rectangle is symmetric about the axis of the cylinder 4.

[0029] To reduce the processing cost, as Figure 2 、 Figure 3 shown, the horizontal cross-section of the cavity 3 is designed as a rectangle, the length of the rectangle is W, and the width is D (that is, the front-back distance between every two adjacent diaphragms 2, that is, the thickness of the cavity 3). When designing the matching attenuation sheet and shutter, the dimensions need to match W and D respectively to enable the attenuation sheet and shutter to move up and down freely along the cavity 3 to achieve the effect of attenuating or blocking the rays.

[0030] Further, since usually two groups of diaphragms 2 are provided, with 3 pieces in each group, therefore, in the present technical solution, six diaphragms 2 are provided in the integrated diaphragm assembly.

[0031] Further, the taper of the virtual cone (that is, Figure 2 the angle α in) is 6° or 12°, and this taper meets the corresponding standard requirements.

[0032] Further, to meet the corresponding standard, the thickness of the cavity 3 (that is, the aforementioned dimension D) is 20 mm; the thickness of each diaphragm 2 is 15 mm.

[0033] Further, to enable the attenuator and shutter to better cooperate with the integrated diaphragm assembly, the top of the cylinder 4 can be designed as a horizontal top plane 5 to make its top flatter, that is, when viewed from the side, the cylinder 4 is not a complete circle, but a circle with a part of the top cut off.

[0034] Further, the width of the cavity 3 (i.e., the aforementioned dimension W) can be the same (and this dimension needs to be able to block the largest aperture 1). At this time, the widths of the supporting attenuators, shutters and other components are also the same, and the interchangeability of each component is better; another solution is that the widths of the cavities 3 are different. At this time, the width of the cavity 3 needs to increase in the front-to-back direction. That is, for the aperture 2 at the front, since its aperture 1 is small, only a narrower attenuator or shutter is required to completely block its aperture 1, while for the aperture 2 at the back, since its aperture 1 is large, a wider attenuator or shutter is required to completely block its aperture 1. In this way, it is not necessary to make each attenuator or shutter with the same width, so it is beneficial to save materials and reduce costs. In actual application, a selection can be made from the above two methods according to needs.

[0035] In this technical solution, the material of the integrated aperture assembly is tungsten alloy.

[0036] In the above detailed description, various features are combined in a single embodiment to simplify the present disclosure. This method of disclosure should not be construed as reflecting the intention that the embodiments of the claimed subject matter require more features than those clearly stated in each claim. On the contrary, as reflected in the appended claims, the present utility model is in a state with fewer features than all the features of the disclosed single embodiment. Therefore, the appended claims are hereby clearly incorporated into the detailed description, where each claim alone serves as a separate preferred embodiment of the present utility model.

[0037] In order to enable any person skilled in the art to implement or use the present utility model, the disclosed embodiments have been described above. For those skilled in the art, various modification methods of these embodiments are obvious, and the general principles defined herein can also be applied to other embodiments without departing from the spirit and protection scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given herein, but is consistent with the widest scope of the principles and novel features disclosed in this application.

[0038] The specific embodiments described above further elaborate on the purpose, technical solution and beneficial effects of the present utility model. It should be understood that the above description is only the specific embodiments of the present utility model and is not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An integrated aperture assembly for an irradiation system, characterized in that: It comprises a cylindrical barrel and a plurality of plate-shaped diaphragms fixedly connected to the inside of the barrel; the barrel is arranged horizontally, the plate surface of the diaphragm is perpendicular to the axis of the barrel, and the plurality of diaphragms are arranged in parallel, and a cavity is formed between every two adjacent diaphragms; each diaphragm is provided with a conical diaphragm hole, the diaphragm hole is coaxial with the diaphragm, and the side surfaces of all the diaphragm holes are located on the same virtual cone with a small front and a large rear; the aperture of the cavity is larger than the large end aperture of the diaphragm hole in front of the cavity.

2. The integrated aperture assembly for an irradiation system according to claim 1, characterized in that: The cavity passes through the upper and lower surfaces of the cylinder.

3. The integrated aperture assembly for an irradiation system according to claim 2, characterized in that: The cavity is a vertically arranged long strip structure, the horizontal cross section of the long strip structure is a rectangle, and the rectangle is symmetrical along the axis of the cylinder.

4. The integrated aperture assembly for an irradiation system according to claim 3, characterized in that: The aperture has six pieces in total.

5. The integrated aperture assembly for an irradiation system according to claim 1, characterized in that: The taper of the virtual cone is 6° or 12°.

6. The integrated aperture assembly for an irradiation system according to claim 1, characterized in that: The thickness of the cavity is 20 mm; the thickness of each aperture is 15 mm.

7. The integrated aperture assembly for an irradiation system according to claim 3, characterized in that: The cylinder is also provided with a top plane.

8. The integrated aperture assembly for an irradiation system according to claim 3, characterized in that: All of the cavities have the same width.

9. The integrated aperture assembly for an irradiation system according to claim 3, characterized in that: The widths of the cavities are different, and the widths of the cavities increase gradually from the front to the back.

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