Collimator with size-adjustable collimation opening
The collimator, designed with a multi-stage nested cylinder structure, solves the problem of complex collimator aperture replacement, achieves convenient aperture adjustment and cost savings, simplifies the mechanical structure, and improves ease of use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LINGDONG NUCLEAR POWER
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-01
AI Technical Summary
In the existing technology, changing the aperture of the collimator requires processing multiple collimators, which is costly and inconvenient. The replacement process is complicated, and adding an adjustment device requires an additional complex mechanical structure, thus limiting its applicability.
The design adopts a multi-stage nested cylinder structure, and the collimation orifice size can be adjusted through the detachable connection between the cylinder and the fixing ring, which simplifies the adjustment process of the collimation orifice diameter and eliminates the need for a drive device and mechanical mechanism.
It enables simple adjustment of the collimation aperture, reduces the difficulty of operation, improves the ease of use, saves costs, has a simple structure, and is widely applicable.
Smart Images
Figure CN224190686U_ABST
Abstract
Description
A collimator with adjustable collimation aperture size Technical Field
[0001] This utility model relates to the field of nuclear radiation detection, and in particular to a collimator with an adjustable collimation aperture size. Background Technology
[0002] Gamma-ray detectors typically require a collimator, which is usually made of materials that strongly absorb gamma rays, such as lead or tungsten. The collimator material effectively absorbs gamma rays. By designing the collimator into a specific shape, enclosing the detector probe, and pre-drilling an opening in a specific direction (usually at the front end), interference from ambient radiation (outside the opening) can be shielded, limiting the direction and angle at which gamma rays enter the detector, thereby improving detection accuracy.
[0003] In radiation measurement scenarios, the required collimator aperture needs to be designed in advance based on the detector's performance parameters and the radiation intensity of the object being measured. This controls the intensity of rays entering the detector, ensuring that the detector's count rate is within a reasonable range—neither too high, causing a "blockage," nor too low, leading to excessively long measurement times.
[0004] The dose rate varies significantly between different measurement scenarios, necessitating the matching of collimators with different apertures to the detector. Related technologies achieve this by either replacing the entire collimator with a different aperture or adding a collimation aperture size adjustment device. However, replacing collimators with different apertures requires manufacturing multiple sets, which is costly and inconvenient due to the weight of the collimators. Adding a collimation aperture size adjustment device requires the design of a complex drive mechanism and mechanical structure, limiting its applicability. Summary of the Invention
[0005] The technical problem to be solved by this utility model is to provide a collimator with an adjustable collimation aperture size.
[0006] The technical solution adopted by this utility model to solve its technical problem is:
[0007] A collimator with an adjustable collimation aperture size, comprising:
[0008] An adjustment assembly includes multiple cylinders and a aligning orifice axially opened in each cylinder; the multiple cylinders are coaxially sleeved through the aligning orifice in sequence, and the inner diameter of the aligning orifice of each cylinder is equal to or less than the outer diameter of the adjacent inner cylinder.
[0009] Furthermore, in the collimator with adjustable collimation aperture size, the adjustment component preferably includes a fixing ring disposed at one end of each cylinder, wherein the fixing ring of each cylinder is detachably and fixedly connected to the fixing ring of the adjacent cylinder.
[0010] Furthermore, in the collimator with adjustable collimation aperture, preferably the sum of the axial length of each cylinder and the axial length of the fixing ring is equivalent to the axial length of the adjacent inner cylinder.
[0011] Furthermore, in the collimator with adjustable collimation aperture size, preferably the fixing ring portion of the inner cylinder overlaps and covers the fixing ring of the adjacent outer cylinder.
[0012] Furthermore, in the collimator with adjustable collimation aperture size, preferably each fixing ring is provided with a fixing hole and a connecting hole;
[0013] The fixing hole of each fixing ring corresponds to the connecting hole on the adjacent fixing ring, and a fixing member is inserted in the two corresponding fixing holes and the connecting hole to connect and fix the adjacent fixing rings.
[0014] Furthermore, in the collimator with adjustable collimation aperture size, preferably, four cylinders are provided.
[0015] Furthermore, in the collimator with adjustable collimation aperture size, preferably the collimator further includes at least one base for mounting and fixing the adjustment component to the detector.
[0016] Furthermore, in the collimator with adjustable collimation aperture, the base preferably includes a cylindrical body and a mounting hole defined by the inner wall of the body, the cylindrical body is nested in the mounting hole, and the body is sleeved on the detector through the mounting hole.
[0017] Furthermore, in the collimator with adjustable collimation aperture, the main body preferably includes a cylindrical outer shell and an inner shell, the mounting hole being formed on the inner wall surface of the inner shell; the outer shell and the inner shell are connected and define an annular groove with an opening; a lead block is installed in the annular groove, and a cover is installed over the opening of the annular groove.
[0018] Furthermore, in the collimator with adjustable collimation aperture, preferably, at least one limiting tube is provided on the outer shell, the at least one limiting tube is sleeved and connected to the detector, and the outer shell is provided with a handle.
[0019] The present invention has the following advantages: Through the multi-stage nested cylinder structure design, the collimator's collimation orifice diameter can be easily adjusted, reducing the difficulty of adjusting the collimation orifice and improving the ease of use. It eliminates the need to process multiple sets of collimators with different opening orifice diameters, and eliminates the need for any drive device or mechanical mechanism, thus saving costs and simplifying the structure. Attached Figure Description
[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:
[0021] Figure 1 is a three-dimensional structural diagram of a collimator with an adjustable collimation aperture in some embodiments of the present invention;
[0022] Figure 2 is a cross-sectional schematic diagram of the collimator with adjustable collimation aperture shown in Figure 1;
[0023] Figure 3 is a three-dimensional exploded view of the collimator with adjustable collimation aperture shown in Figure 1.
[0024] Figure 4 is a three-dimensional exploded view of the adjustment component shown in Figure 3;
[0025] Figure 5 is a three-dimensional structural diagram of the base shown in Figure 3;
[0026] Figure 6 is a three-dimensional exploded structural diagram of the base shown in Figure 5. Detailed Implementation
[0027] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.
[0028] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0029] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
[0030] The technical solution adopted by this utility model to solve its technical problem is:
[0031] As shown in Figures 1 and 2, some embodiments of the present invention disclose a collimator with an adjustable collimation aperture size. In some embodiments, the collimator with an adjustable collimation aperture size may include an adjustment component 10 and a base 20 for mounting the adjustment component 10 on the detector.
[0032] As shown in Figures 3 and 4, in some embodiments, the adjusting assembly 10 may include multiple cylinders 11 and a collimation port 12 axially opened in each cylinder 11. The multiple cylinders 11 are coaxially nested through the collimation ports 12 in sequence, and the inner diameter of the collimation port 12 of each cylinder 11 is equal to or smaller than the outer diameter of the adjacent inner cylinder 11. The nested structure design of multiple cylinders 11 passing through the collimation ports 12 in sequence realizes simple adjustment of the aperture of the collimator's collimation port 12. When it is necessary to change the size of the collimation port 12, it is only necessary to disassemble and install the cylinders 11 to change the size of the collimation port 12, which reduces the difficulty of replacing the collimator, improves the convenience of use, and has a simple structure.
[0033] Referring again to Figure 4, in some embodiments, four cylinders 11 are provided, namely a first cylinder 111, a second cylinder 112, a third cylinder 113, and a fourth cylinder 114. Similarly, four collimating ports 12 are provided, namely a first collimating port 121, a second collimating port 122, a third collimating port 123, and a fourth collimating port 124. Specifically, the first collimating port 121 is formed on the first cylinder 111, the second collimating port 122 is formed on the second cylinder 112, the third collimating port 123 is formed on the third cylinder 113, and the fourth collimating port 124 is formed on the fourth cylinder 114. The second cylinder 112 is nested in the first collimating port 121 of the first cylinder 111, the third cylinder 113 is nested in the second collimating port 122 of the second cylinder 112, and the fourth cylinder 114 is nested in the third collimating port 123 of the third cylinder 113.
[0034] For example, the outer diameter (thickness) of the first cylinder 111 is 50 mm, and the diameter (inner diameter) of the first collimating orifice 121 is 35 mm. The outer diameter (thickness) of the second cylinder 112 is less than or equal to 35 mm, and the diameter (inner diameter) of the second collimating orifice 122 is 25 mm. The outer diameter (thickness) of the third cylinder 113 is less than or equal to 25 mm, and the diameter (inner diameter) of the third collimating orifice 123 is 15 mm. The outer diameter (thickness) of the fourth cylinder 114 is less than or equal to 15 mm, and the diameter (inner diameter) of the fourth collimating orifice 124 is 5 mm.
[0035] Referring again to Figures 2 and 3, in some embodiments, the adjusting assembly 10 further includes a fixing ring 13 at one end of each cylinder 11, wherein the fixing ring 13 of each cylinder 11 is detachably and fixedly connected to the fixing ring 13 of the adjacent cylinder 11. Specifically, each fixing ring 13 is provided with a fixing hole 131 and a connecting hole 132; the fixing hole 131 of each fixing ring 13 corresponds to the connecting hole 132 on the adjacent covering fixing ring 13, and a fastener is inserted into these two corresponding fixing holes 131 and connecting holes 132 to connect and fix the adjacent fixing rings 13. It can be understood that the fastener is a bolt, and two adjacent fixing rings 13 are fixed together by bolts.
[0036] Referring again to Figure 2, in some embodiments, the retaining rings 13 of the inner cylinder 11 partially overlap and cover the retaining rings 13 of the adjacent outer cylinder 11. It is understood that the outer diameter of the retaining ring 13 of each cylinder 11 is larger than the outer diameter of the retaining ring 13 of the adjacent inner cylinder 11. The outer diameter of the retaining ring 13 of each cylinder 11 decreases sequentially from the outer diameter of the retaining ring 13 of the adjacent inner cylinder 11, to facilitate the fixing and disassembly of the retaining rings 13 when multiple cylinders 11 are nested together.
[0037] In some embodiments, the sum of the axial length of each cylinder 11 and the axial length of the fixing ring 13 is equivalent to the axial length of the adjacent inner cylinder 11. It is understood that when multiple cylinders 11 are nested together, the multiple fixing rings 13 of the multiple cylinders 11 overlap, and the ends of the multiple cylinders 11 facing away from the fixing rings 13 must be in the same plane (see Figure 2). Therefore, the axial length from the outer cylinder 11 to the nested inner cylinder 11 increases sequentially. For example, the sum of the axial length of the first cylinder 111 and the axial length of the fixing ring 13 is equal to the axial length of the second cylinder 112.
[0038] As shown in Figures 5 and 6, in some embodiments, the base 20 may include a cylindrical body 21 and a mounting hole 22 defined by the inner wall of the body 21. The cylindrical body 11 is nested in the mounting hole 22, and the body 21 is fitted onto the detector through the mounting hole 22.
[0039] In some embodiments, the body 21 may include a cylindrical outer shell 211 and an inner shell 212, with mounting holes 22 formed on the inner wall surface of the inner shell 212; the outer shell 211 and the inner shell 212 are connected, defining an annular groove 213 with an opening; a lead block 214 is installed in the annular groove 213, and a cover 215 is installed over the opening of the annular groove 213. The lead block 214 is used to shield against interference from ambient radiation, limiting the direction and angle of radiation entering the detector.
[0040] Referring again to Figure 6, in some embodiments, the outer casing 211 is provided with at least one limiting tube 216. The at least one limiting tube 216 is sleeved and connected to the detector. It can be understood that the detector is provided with a guide post corresponding to the limiting tube 216. The limiting tube 216 is sleeved outside the guide post to facilitate the installation of the collimator on the detector and limit its installation position to avoid misalignment.
[0041] In some embodiments, the housing 211 is also provided with a handle 217 to facilitate lifting (moving) the collimator during installation, given its weight.
[0042] It should be noted that, for those skilled in the art, without departing from the concept of this utility model, the above-mentioned technical features can be freely combined, and several modifications and improvements can be made, all of which fall within the protection scope of this utility model.
Claims
1. A collimator with an adjustable collimation aperture, characterized in that, include: An adjustment assembly (10) includes a plurality of cylinders (11) and a aligning port (12) axially opened in each cylinder (11); the plurality of cylinders (11) are coaxially sleeved through the aligning port (12) in sequence, and the inner diameter of the aligning port (12) of each cylinder (11) is equal to or less than the outer diameter of the adjacent inner cylinder (11).
2. The collimator with adjustable collimation aperture size according to claim 1, characterized in that, The adjustment assembly (10) further includes a fixing ring (13) disposed at one end of each cylinder (11), wherein the fixing ring (13) of each cylinder (11) is detachably and fixedly connected to the fixing ring (13) of the adjacent cylinder (11).
3. The collimator with adjustable collimation aperture size according to claim 2, characterized in that, The sum of the axial length of each cylinder (11) and the axial length of the fixing ring (13) is equivalent to the axial length of the adjacent inner cylinder (11).
4. The collimator with adjustable collimation aperture size according to claim 2, characterized in that, The fixing ring (13) of the inner cylinder (11) partially overlaps and covers the fixing ring (13) of the adjacent outer cylinder (11).
5. The collimator with adjustable collimation aperture size according to claim 2, characterized in that, Each of the fixed rings (13) is provided with a fixing hole (131) and a connecting hole (132); the fixing hole (131) of each fixed ring (13) corresponds to the connecting hole (132) on the adjacent fixed ring (13), and a fastener is inserted in the two corresponding fixing holes (131) and connecting holes (132) to connect and fix the adjacent fixed rings (13).
6. The collimator with adjustable collimation aperture size according to claim 1, characterized in that, The cylinder (11) is provided in four parts.
7. The collimator with adjustable collimation aperture size according to claim 1, characterized in that, The collimator with adjustable collimation aperture also includes at least one base (20) for mounting and fixing the adjustment assembly (10) to the detector.
8. The collimator with adjustable collimation aperture size according to claim 7, characterized in that, The base (20) includes a cylindrical body (21) and a mounting hole (22) defined by the inner wall of the body (21). The cylindrical body (11) is nested in the mounting hole (22), and the body (21) is fitted onto the detector through the mounting hole (22).
9. The collimator with adjustable collimation aperture size according to claim 8, characterized in that, The body (21) includes a cylindrical outer shell (211) and an inner shell (212), and the mounting hole (22) is formed on the inner wall surface of the inner shell (212); the outer shell (211) and the inner shell (212) are connected and define an annular groove (213) with an opening; a lead block (214) is installed in the annular groove (213), and a cover (215) is installed over the opening of the annular groove (213).
10. The collimator with adjustable collimation aperture size according to claim 9, characterized in that, At least one limiting tube (216) is provided on the outer shell (211), and the at least one limiting tube (216) is sleeved and connected to the detector. A handle (217) is provided on the outer shell (211).