Plastic scintillator optical fiber array detector support and radiation detection platform

Abstract

The utility model discloses a plastic scintillator optical fiber array detector support and a radiation detection platform, and particularly relates to the technical field of nuclear radiation detection. The detector support comprises an optical fiber clamp and an optical fiber clamp side support. The optical fiber clamp side supports are arranged on two sides of the optical fiber clamp; clamping plate fixing plates are arranged at the top and the bottom of the optical fiber clamp; a top-layer clamping plate, a middle clamping plate and a bottom-layer clamping plate are sequentially arranged between the two clamping plate fixing plates; an optical fiber clamp embedding groove is formed in the bottom of the optical fiber clamp side support, aluminum column fixing holes are formed in the four corners of the bottom of the optical fiber clamp side support, and the optical fiber clamp side support and the optical fiber clamp are connected through the aluminum column fixing holes and the optical fiber clamp embedding groove; the top of the optical fiber clamp side support is provided with an optical fiber bundling hole. According to the device, the occupied area of an optical fiber port is reduced, and the photomultiplier selection pressure is relieved; a photomultiplier tube channel is also designed, so that the light shielding requirement is met; in addition, the device is provided with a detachable optical fiber platform main body, is convenient for product maintenance and recovery, and can be applied to real-time online monitoring of water radioactivity.

Description

Technical Field

[0001] The utility model belongs to the technical field of nuclear radiation detection, and particularly relates to a plastic scintillator fiber array detector bracket and a radiation detection platform. Background Art

[0002] With the development and progress of society, nuclear energy is one of the most efficient clean energies available at present. The safe operation of nuclear facilities is related to the national economy and people's safety. Therefore, the ray detection of the surrounding environment of nuclear facilities is very important, which can not only verify whether the design of radiation shielding meets the requirements, but also ensure that instruments, equipment and personnel are not affected by large doses of radiation. And since the nuclear accident, the problem of radioactive pollution of water bodies has received more extensive attention. Therefore, it is necessary to further carry out research on water body radioactive monitoring technology. According to investigations and research, the direct on-line measurement of water samples by detectors has the advantage of eliminating the cumbersome process of sample preparation compared with the traditional laboratory sampling analysis method, and is more time-effective. Moreover, the development of a water body radioactive monitoring system with real-time and on-line monitoring functions has become the current development trend in this field. At present, there are mainly three existing devices for measuring the α and β radioactivity of water bodies: the TAWARA-RTM water body radioactive pollution monitoring system, the total α and total β on-line monitoring device for drinking water, and the on-line measurement device for α and β radionuclides in water bodies. However, none of these three devices can perform real-time α and β on-line monitoring.

[0003] Scintillation detection technology is one of the most widely used radiation detection technologies. As a common nuclear radiation detector, a scintillation detector generally consists of two parts: a scintillator and a photomultiplier tube. Scintillation fiber is a functional element with both ray detection and optical signal transmission functions. It can be bent into different shapes and can also extend to any position in space. The detector composed of it has the advantages of good spatial resolution, good time resolution, good mechanical plasticity, etc., and has been widely used in nuclear radiation detection, industrial, medical, and biological ray imaging systems. However, due to the disadvantages of the fiber itself, such as being easily damaged, having poor resistance to bending, and weak impact resistance, and in the actual application process, it is necessary to keep the fiber and the photomultiplier tube in a light-shielded environment at the same time. It can be seen that preparing a fiber detector with better performance is a current technical problem. Therefore, how to prepare a fiber detector with better detection performance is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Utility Model

[0004] To solve the above problems in the prior art, the utility model provides a plastic scintillator fiber array detector bracket and a radiation detection platform.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] One of the technical solutions provided by the utility model:

[0007] The utility model provides a plastic scintillating fiber array detector bracket, which comprises a fiber fixture and a side support of the fiber fixture;

[0008] The side support of the fiber fixture is arranged on both sides of the fiber fixture;

[0009] Clamping plate fixing plates are arranged at the top and bottom of the fiber fixture. Observation windows are arranged on the clamping plate fixing plates. A top clamping plate, a middle clamping plate and a bottom clamping plate are sequentially arranged between the two clamping plate fixing plates. Grooves are arranged on the top clamping plate, the middle clamping plate and the bottom clamping plate;

[0010] A fiber fixture embedding groove is arranged at the bottom of the side support of the fiber fixture. Aluminum post fixing holes are arranged at the four corners of the bottom. The side support of the fiber fixture is connected with the fiber fixture through the aluminum post fixing holes and the fiber fixture embedding groove; A waterproof silica gel groove is arranged at the top of the side support of the fiber fixture, and the waterproof silica gel groove is connected with a fiber beam collecting hole.

[0011] Beneficial effects: The middle clamping plate, the bottom clamping plate and the top clamping plate included in the fiber fixture of the utility model can be used to fix the middle part of the optical fiber, can effectively separate the optical fibers, ensure that each optical fiber is fully in contact with the liquid to be measured, and at the same time effectively prevent the optical fibers from being entangled or collapsed and deformed with each other, ensure that the optical fibers are parallel to each other and keep a straight state, and minimize the loss in the optical signal transmission process. The clamping plate fixing plates are used to fix the middle clamping plate, the bottom clamping plate and the top clamping plate at the same time, effectively prevent relative displacement between the three, and further avoid the optical fiber from being twisted.

[0012] The side support of the fiber fixture in the utility model is used to clamp and fix the fiber fixture, make the position of the fiber fixture in the overall middle position and keep it in a suspended state, avoid the contact between the optical fiber and the liquid sediment, and cause damage to the optical fiber. In addition, the fiber beam collecting holes at the top of the side support of the fiber fixture can centrally fix the head and tail ends of the fiber beam by filling resin, effectively reducing the occupied area of the fiber beam collecting port.

[0013] Further, four observation windows are arranged on the clamping plate fixing plates so as to observe the state of the optical fiber at any time.

[0014] Further, aluminum post fixing holes are arranged at both ends of the top clamping plate, the middle clamping plate and the bottom clamping plate, and aluminum post fixing holes are also arranged at both ends and in the middle of the clamping plate fixing plates. The clamping plate fixing plates are stacked and connected with the top clamping plate, the middle clamping plate and the bottom clamping plate through the aluminum post fixing holes.

[0015] Further, the aluminum posts in the aluminum post fixing holes are fixed in the aluminum post fixing holes by dome nuts, and the length of the aluminum posts should be slightly longer than the thickness after the assembly of the above five components. Fixing with dome nuts can prevent scratching and friction on the upper or lower surface.

[0016] Further, grooves are provided on the lower surface of the top clamping plate, the upper and lower surfaces of the middle clamping plate, and the upper surface of the bottom clamping plate.

[0017] Further still, the grooves are preferably semi-circular grooves.

[0018] Further, the number of grooves on the upper and lower surfaces of the middle clamping plate differs by 1, the number of grooves on the lower surface of the top clamping plate and the upper surface of the bottom clamping plate differs by 1, and at the same time, it is ensured that the number of grooves on the mating surfaces of adjacent two clamping plates is equal.

[0019] Further, observation windows are provided on all four sides of the side support of the optical fiber fixture.

[0020] Further still, the material of the optical fiber fixture is acrylic; the material of the side support of the optical fiber fixture is selected as carbon fiber nylon; the materials of the waterproof posts and the water storage tank are selected as aluminum alloy, and the product is corrosion-resistant, can be used for a long time, is green and environmentally friendly, and is safe and non-toxic.

[0021] This device can change the optical fiber clamping method, and clamp the optical fiber with soft glue, sponge, cloth or other substances with elastic deformation; this device reduces the volume of the clamping plate to increase the contact area between the optical fiber and the nuclear medicine radioactive wastewater; this device uses more groups of clamping plates to increase the length of the optical fiber and keep the optical fiber in a straight state; this device uses more layers of clamping plates to increase the number of optical fibers; any one of the methods of fixing the clamping plate by glue bonding, magnet adsorption, or installing a buckle can be adopted for this device.

[0022] The second technical solution of the present utility model:

[0023] The present utility model provides a radiation detection platform, including a water storage tank, waterproof posts, and the plastic scintillator fiber array detector bracket.

[0024] Further, the plastic scintillator fiber array detector bracket is connected inside the water storage tank (13).

[0025] Further, screw holes are provided on both sides of the water storage tank for assembling the waterproof posts.

[0026] Further, the waterproof column includes a stud which mates with the threaded hole. One end of the stud is connected with a frosted surface which extends into the interior of the water storage tank and is connected to the optical fiber bundling hole of the plastic scintillator fiber array detector bracket. The other end of the stud is connected with a rotating shaft hole which is located outside the water storage tank and is convenient for inserting a rotating shaft. The waterproof column is assembled to the water storage tank through the threaded hole. During assembly, waterproof tape should be wound around the threaded hole to fill the gap after the assembly of the threaded hole and avoid liquid leakage caused by the gap.

[0027] Further, the interior of the waterproof column is a photomultiplier tube channel which is convenient for extending into the photomultiplier tube and connecting with the optical fiber bundling port, and ensuring that the optical fiber bundling port is perpendicularly connected to the photomultiplier tube.

[0028] Further, a light-shielding cover plate is arranged on the top of the water storage tank. The sealed light-shielding cover plate at the top is used to isolate the internal and external environments of the water storage tank, avoid the pollution of the water storage tank environment caused by the evaporation or splashing of the liquid in the water storage tank, and the sealed light-shielding cover plate can also ensure the light-shielding environment in the water storage tank and avoid the generation of bad signals or noises due to light leakage.

[0029] Compared with the prior art, the present utility model has the following beneficial effects:

[0030] A waterproof silica gel groove is arranged on the side support of the optical fiber fixture of the present utility model, and a waterproof silica gel ring is assembled in the waterproof silica gel groove. When the waterproof column is assembled to the water storage tank, the silica gel ring is simultaneously extruded to tightly compress the silica gel ring to achieve the purpose of waterproofing. After the assembly of the waterproof column is completed, the rotating shaft hole on the side should be wound with light-shielding cloth or light-shielding plate to ensure that the photomultiplier tube is in a light-shielded state and avoid damage to the photomultiplier tube due to light leakage and overload.

[0031] The plastic scintillator fiber array detector bracket provided by the present utility model can effectively fix the position of each optical fiber, making it independent of other optical fibers and avoiding excessive bending, stretching and mutual winding. At the same time, the more the number of optical fibers, the larger the cross-sectional area, and the larger the size of the photomultiplier tube required. The optical fiber bundling device provided by the present utility model reduces the cross-sectional area of the array optical fiber port and effectively reduces the selection pressure of the photomultiplier tube. In addition, in practical applications, the optical fiber and the photomultiplier tube need to be in a light-shielded environment at the same time. The plastic scintillator fiber array detection system provided by the present utility model can effectively meet the light-shielding requirements and does not require an additional dark room or an external lightless environment. Moreover, the plastic scintillator fiber array detector bracket provided by the present utility model can be applied to the real-time online monitoring of water body radioactivity.

[0032] The utility model reduces the occupied area of the fiber optic ports through the fiber optic beam holes, alleviates the selection pressure of photomultiplier tubes, and enables small-sized photomultiplier tubes to meet the interface requirements. Moreover, the utility model designs a photomultiplier tube channel on the waterproof column, which facilitates the connection between the photomultiplier tube and the fiber optic port and simultaneously meets the light-shielding requirements of the photomultiplier tube. The utility model is an assembly-detachable fiber optic platform main body, which is convenient for the maintenance and recycling of products. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings:

[0034] Figure 1 Schematic three-dimensional structure diagram of the plastic scintillator fiber optic array detector bracket provided by the present utility model;

[0035] Figure 2 Schematic structure diagram of the fiber optic fixture in the plastic scintillator fiber optic array detector bracket provided by the present utility model;

[0036] Figure 3 Schematic side support structure diagram of the fiber optic fixture in the plastic scintillator fiber optic array detector bracket provided by the present utility model;

[0037] Figure 4 Schematic top clamping plate structure diagram of the fiber optic fixture in the plastic scintillator fiber optic array detector bracket provided by the present utility model;

[0038] Figure 5 Schematic middle clamping plate structure diagram of the fiber optic fixture in the plastic scintillator fiber optic array detector bracket provided by the present utility model;

[0039] Figure 6 Schematic bottom clamping plate structure diagram of the fiber optic fixture in the plastic scintillator fiber optic array detector bracket provided by the present utility model;

[0040] Figure 7 Schematic clamping plate fixing plate structure diagram of the fiber optic fixture in the plastic scintillator fiber optic array detector bracket provided by the present utility model;

[0041] Figure 8 Schematic three-dimensional structure diagram of the radiation detection platform provided by the present utility model;

[0042] Figure 9 Schematic structure diagram of the water storage tank in the radiation detection platform provided by the present utility model;

[0043] Figure 10 Schematic diagram of the waterproof column in the radiation detection platform provided by the present utility model.

[0044] Wherein, A, optical fiber fixture; B, side support of optical fiber fixture; 1, top clamping plate; 2, middle clamping plate; 3, bottom clamping plate; 4, clamping plate fixing plate; 5, dome nut; 6, aluminum column; 7, aluminum column fixing hole; 8, observation window; 9, waterproof silica gel groove; 10, optical fiber bundle hole; 11, optical fiber fixture embedding groove; 12, groove; 13, water storage tank; 14, waterproof column; 15, rotating shaft hole; 16, light-shielding cover plate; 17, screw hole; 18, stud; 19, frosted surface; 20, photomultiplier tube channel. Specific embodiments

[0045] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0046] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] Embodiment 1

[0048] Referring to Figures 1 to 7 , the present utility model provides a plastic scintillator fiber array detector bracket, including an optical fiber fixture (A) and a side support (B) of the optical fiber fixture;

[0049] The side support (B) of the optical fiber fixture is arranged on both sides of the above-mentioned optical fiber fixture (A) to clamp and fix the optical fiber fixture (A), so that it is in the middle position of the plastic scintillator fiber array detector bracket and remains suspended;

[0050] Among them, clamping plate fixing plates (4) are provided at both the top and bottom of the optical fiber fixture (A). Four observation windows (8) are respectively provided on the clamping plate fixing plates (4), and two aluminum post fixing holes (7) need to be respectively provided at both ends and the middle position thereof, a total of 6; three groups of clamping plates are respectively provided at both ends and the middle position of the upper and lower clamping plate fixing plates (4). Each group of clamping plates includes a top clamping plate (1), a middle clamping plate (2), and a bottom clamping plate (3) from top to bottom. Aluminum post fixing holes (7) are respectively provided at both ends of the top clamping plate (1), the middle clamping plate (2), and the bottom clamping plate (3). By inserting aluminum posts (6) into the aluminum post fixing holes (7) and tightening the dome nuts (5) at the top of the aluminum post fixing holes (7), the above-mentioned top clamping plate (1), middle clamping plate (2), bottom clamping plate (3), and clamping plate fixing plate (4) are assembled into the optical fiber fixture (A). Among them, semi-circular grooves (12) are provided on the lower surface of the above-mentioned top clamping plate (1), the upper and lower surfaces of the middle clamping plate (2), and the upper surface of the bottom clamping plate (3). Moreover, the number of semi-circular grooves (12) on the upper and lower surfaces of the middle clamping plate (2) differs by 1, and the number of semi-circular grooves (12) on the lower surface of the top clamping plate (1) and the upper surface of the bottom clamping plate (3) differs by 1. At the same time, it is ensured that the number of semi-circular grooves (12) on the joint surfaces of adjacent two layers of clamping plates is equal.

[0051] Observation windows (8) are provided on each of the four side surfaces of the optical fiber fixture side support (B). An optical fiber fixture embedding groove (11) is provided at the bottom of the optical fiber fixture side support (B). Aluminum post fixing holes (7) are provided at the four corners of its bottom. The above-mentioned optical fiber fixture (A) is connected to the optical fiber fixture side support (B) through the optical fiber fixture embedding groove (11) and the aluminum post fixing holes (7) of the optical fiber fixture side support (B); a waterproof silicone groove (9) is provided at the top of the above-mentioned optical fiber fixture side support (B), and the waterproof silicone groove (9) is connected to an optical fiber bundling hole (10).

[0052] Embodiment 2

[0053] Refer to Figures 8 to 10 and the present utility model provides a radiation detection platform, which includes a water storage tank (13), a waterproof column (14), and the above-mentioned plastic scintillator fiber array detector support;

[0054] Among them, the plastic scintillating fiber array detector bracket is connected inside the water storage tank (13). The top of the water storage tank (13) is provided with a light-shielding cover plate (16) to isolate the internal and external environments of the water storage tank (13), and screw holes (17) are provided on both sides; the waterproof column (14) is provided with a stud (18), which cooperates with the screw hole (17). One end of the stud (18) is connected with a frosted surface (19), and the frosted surface (19) extends into the water storage tank (13) and is connected to the optical fiber bundle hole (10) of the above-mentioned plastic scintillating fiber array detector bracket. The other end of the stud (18) is connected with a rotating shaft hole (15), which is located outside the water storage tank (13); the inside of the waterproof column is a photomultiplier tube channel (20).

[0055] In practical applications, the optical fiber fixture side support (B) clamps and fixes the optical fiber fixture (A), so that the optical fiber fixture (A) is located in the middle position of the whole and remains suspended, avoiding the contact between the optical fiber and the liquid sediment, which may cause damage to the optical fiber; on the other hand, the optical fiber bundle holes (10) at the top of the optical fiber fixture side support (B) centrally fix the head and tail ends of the optical fiber bundle by filling resin, effectively reducing the occupied area of the optical fiber bundle holes (10).

[0056] The waterproof silica gel groove (9) of the optical fiber fixture side support (B) is equipped with a waterproof silica gel ring. When the waterproof column (14) is assembled into the water storage tank (13), the silica gel ring is simultaneously squeezed, so that the silica gel ring is tightly compressed to achieve the waterproof purpose; after the waterproof column (14) is assembled, the rotating shaft hole (15) on the side should be wound with a light-shielding cloth or a light-shielding plate to ensure that the photomultiplier tube is in a light-shielded state, avoiding the overload damage of the photomultiplier tube caused by light leakage. The photomultiplier tube on the photomultiplier tube channel (20) of the waterproof column (14) is connected to the optical fiber bundle hole (10) of the plastic scintillating fiber array detector bracket, and it is also necessary to connect it vertically to the photomultiplier tube. At the same time, rotate the waterproof column (14) and assemble the waterproof column (14) onto the water storage tank (13) through the screw hole (17), and cover and seal the light-shielding cover plate (16) on the water storage tank (13) of the detection scintillating fiber platform to isolate the internal and external environments of the water storage tank (13), then the detection application can be carried out.

[0057] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "middle", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention.

[0058] The above are only the preferred specific embodiments of the present utility model, and the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A plastic scintillator fiber array detector bracket, characterized in that The detector bracket includes an optical fiber clamp (A) and a side support of the optical fiber clamp (B); The side support of the optical fiber clamp (B) is arranged on both sides of the optical fiber clamp (A); At the top and bottom of the optical fiber clamp (A), there are clamping plate fixing plates (4), the clamping plate fixing plates (4) are provided with observation windows (8), between the two clamping plate fixing plates (4), a top clamping plate (1), a middle clamping plate (2) and a bottom clamping plate (3) are arranged in sequence, and the top clamping plate (1), the middle clamping plate (2) and the bottom clamping plate (3) are provided with grooves (12); At the bottom of the side support of the optical fiber clamp (B), there is an optical fiber clamp embedding groove (11), and at the four corners of its bottom, there are aluminum column fixing holes (7), and the side support of the optical fiber clamp (B) is connected to the optical fiber clamp (A) through the aluminum column fixing holes (7) and the optical fiber clamp embedding groove (11); at the top of the side support of the optical fiber clamp (B), there is a waterproof silicone groove (9), and the waterproof silicone groove (9) is connected to an optical fiber bundle hole (10).

2. The plastic scintillator fiber array detector bracket according to claim 1, wherein Both ends of the top clamping plate (1), the middle clamping plate (2) and the bottom clamping plate (3) are provided with aluminum column fixing holes (7), and both ends and the middle of the clamping plate fixing plate (4) are also provided with aluminum column fixing holes (7), and the clamping plate fixing plate (4) is stacked and connected to the top clamping plate (1), the middle clamping plate (2) and the bottom clamping plate (3) through the aluminum column fixing holes (7).

3. The plastic scintillator fiber array detector bracket according to claim 1, characterized in that The number of grooves (12) on the upper and lower surfaces of the middle clamping plate (2) differs by 1, and the number of grooves (12) on the lower surface of the top clamping plate (1) and the upper surface of the bottom clamping plate (3) differs by 1.

4. A plastic scintillator fiber array detector bracket according to claim 1, characterized in that, Observation windows (8) are arranged on all four sides of the side support of the optical fiber clamp (B).

5. A radiation detection platform, characterized in that, It includes a water storage tank (13), a waterproof column (14) and a plastic scintillator fiber array detector bracket according to any one of claims 1 to 4.

6. A radiation detection platform according to claim 5, characterized in that, The plastic scintillator fiber array detector bracket is connected inside the water storage tank (13).

7. A radiation detection platform according to claim 5, characterized in that, Both sides of the water storage tank (13) are provided with screw holes (17).

8. A radiation detection platform according to claim 7, characterized in that, The waterproof column (14) includes a stud (18), the stud (18) cooperates with the screw hole (17), one end of the stud (18) is connected with a frosted surface (19), and the frosted surface (19) extends into the water storage tank (13) and is connected to the optical fiber bundle hole (10) of the plastic scintillator fiber array detector bracket, and the other end of the stud (18) is connected with a rotating shaft hole (15), which is located outside the water storage tank (13).

9. A radiation detection platform according to claim 5, characterized in that The inside of the waterproof column (14) is a photomultiplier tube channel (20).

10. A radiation detection platform according to claim 5, characterized in that, A light-shielding cover plate (16) is arranged on the top of the water storage tank (13).

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