A gamma spectrometer dedicated to underwater use

Abstract

The application discloses a kind of underwater special gamma spectrometer, it is related to gamma spectrometer technical field, including the detection module for monitoring gamma ray, still including watertight cylinder, annular limiting support block is slidably sleeved in watertight cylinder, and detection module is set in limiting support block, limiting support block is provided with the elastic damping structure connected with the inner side wall of watertight cylinder, the first vice watertight cabin, main watertight cabin and second vice watertight cabin are connected in three sections, and different wall thickness is respectively arranged, not only can realize modular assembly, and can guarantee the strength of whole device by main watertight cabin, by the first vice watertight cabin and second vice watertight cabin reduce wall thickness to control weight, and reduce the shielding effect to gamma ray, improve monitoring effect, and by the elastic deformation of elastic damping structure, detection module is buffered and damped, will not produce plastic deformation, guarantee the shock resistance of detection module.

Description

Technical Field

[0001] This invention relates to the field of energy dispersive spectrometer technology, and specifically to an underwater-specific gamma energy dispersive spectrometer. Background Technology

[0002] In-situ monitoring of radionuclides in the marine environment is crucial for nuclear emergency response and pollution assessment, and is generally carried out using gamma spectrometers.

[0003] Existing gamma spectrometers have several limitations. The pressure-resistant casings currently used have low transmittance of gamma rays per unit thickness. While polymer materials have higher transmittance, their pressure resistance is poor, requiring increased thickness to improve pressure resistance. Furthermore, it is difficult to manufacture casings that meet pressure resistance requirements while remaining non-deformable. However, further increasing wall thickness would further increase gamma ray attenuation. Secondly, shock absorption is typically achieved using rubber bushings and foam, but marine instruments have very long deployment periods, measured in years. Simply using rubber bushings and foam for shock absorption would lead to plastic deformation, reducing the instrument's shock resistance. Therefore, existing gamma spectrometer casings suffer from low gamma ray transmittance, and the shock resistance of gamma spectrometers decreases over time. Summary of the Invention

[0004] The purpose of this invention is to provide an underwater-specific gamma spectrometer, which solves the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0006] An underwater gamma spectrometer includes a detection module for monitoring gamma rays and a watertight cylinder. A ring-shaped limiting support block is slidably sleeved inside the watertight cylinder, and the detection module is disposed inside the limiting support block. An elastic damping structure connected to the inner wall of the watertight cylinder is provided on the limiting support block.

[0007] The watertight cylinder includes a first auxiliary watertight chamber, a main watertight chamber, and a second auxiliary watertight chamber. The first auxiliary watertight chamber and the second auxiliary watertight chamber are both fixedly connected to both ends of the main watertight chamber via flanges. The wall thickness of the first auxiliary watertight chamber and the second auxiliary watertight chamber is less than the wall thickness of the main watertight chamber. The limiting support block is located inside the main watertight chamber.

[0008] In a preferred embodiment of the present invention, the detection module includes a detector crystal, a photoelectric conversion module, a detector multi-channel pulse amplitude analyzer, and a data acquisition circuit board connected in sequence. The detector crystal is located in the second watertight chamber, while the photoelectric conversion module, the detector multi-channel pulse amplitude analyzer, and the data acquisition circuit board are all located in the main watertight chamber. A limiting support block is provided in the main watertight chamber, and the detector crystal, the photoelectric conversion module, the detector multi-channel pulse amplitude analyzer, and the data acquisition circuit board are all fixed on the annular limiting support block.

[0009] In a preferred embodiment of the present invention, a circuit board mounting base is provided on the limiting support block, and the data acquisition circuit board is mounted on the circuit board mounting base.

[0010] As a preferred embodiment of the present invention, the end of the first sub-watertight chamber is provided with a watertight connector for connecting external equipment.

[0011] In a preferred embodiment of the present invention, the elastic damping structure includes a damping spring and a rubber bushing. One end of the limiting support block is fixed to a fixing seat by bolts, and the damping spring is disposed on the side of the fixing seat away from the data acquisition circuit board. A connecting seat is fixedly connected at the connection between the main watertight chamber and the first auxiliary watertight chamber. A plurality of limiting screws are evenly arranged on the connecting seat, and one end of each of the limiting screws passes through the connecting seat and slides into the fixing seat. An adjusting seat is slidably sleeved on the plurality of limiting screws. The damping spring is disposed between the fixing seat and the connecting seat. The rubber bushing is disposed in the second auxiliary watertight chamber and contacts the detector crystal.

[0012] As a preferred embodiment of the present invention, the connecting seat is threadedly connected with an adjusting screw, and one end of the adjusting screw abuts against the adjusting seat.

[0013] As a preferred embodiment of the present invention, the first auxiliary watertight compartment and the main watertight compartment are fixedly connected by a flange seal, and the main watertight compartment and the second auxiliary watertight compartment are fixedly connected by a flange seal.

[0014] The connecting seat includes an annular plate and a cylindrical body, and the outer circular surface of the cylindrical body is in contact with the inner wall of the annular plate. The annular plate abuts against the flange on the first auxiliary watertight compartment and is located between the flange and the end of the main watertight compartment.

[0015] As a preferred embodiment of the present invention, the flange and the annular plate on the first auxiliary watertight compartment are sealed by a double O-ring fluororubber composite seal, the annular plate and the main watertight compartment are sealed by a double O-ring fluororubber composite seal, and the flanges on the main watertight compartment and the second auxiliary watertight compartment are also sealed by a double O-ring fluororubber composite seal.

[0016] As a preferred embodiment of the present invention, a plurality of inner circular grooves are uniformly formed on the inner wall of the second watertight chamber.

[0017] As a preferred embodiment of the present invention, a plurality of cylindrical reinforcing rods are provided on the inner sidewall of the inner circular groove, and the plurality of cylindrical reinforcing rods are in contact with the inner bottom of the inner circular groove.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] This invention uses a three-section connection of a first watertight chamber, a main watertight chamber, and a second watertight chamber, each with different wall thicknesses. This not only enables modular assembly but also ensures the strength of the entire device through the main watertight chamber. The weight is controlled by reducing the wall thickness of the first and second watertight chambers, which also reduces the shielding effect on gamma rays and improves the monitoring effect. Furthermore, the elastic deformation of the elastic damping structure buffers and dampens the detection module, preventing plastic deformation and ensuring the seismic resistance of the detection module. Attached Figure Description

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] Figure 1 This invention provides a schematic diagram of the structure of an underwater-specific gamma spectrometer.

[0022] Figure 2 A cross-sectional structural schematic diagram of an underwater-specific gamma spectrometer is provided as an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the structure of the second watertight compartment is provided for embodiments of the present invention.

[0024] Figure 4 Provided for embodiments of the present invention Figure 3 The diagram shows an enlarged view of part A.

[0025] The labels in the diagram represent the following:

[0026] 1. Detection module; 2. Watertight cylinder; 3. Elastic shock absorption structure; 4. Watertight connector; 5. Limiting support block; 6. Inner circular groove; 7. Columnar reinforcing rod;

[0027] 101. Detector crystal; 102. Photoelectric conversion module; 103. Detector multi-channel pulse amplitude analyzer; 104. Data acquisition circuit board; 201. First auxiliary watertight chamber; 202. Main watertight chamber; 203. Second auxiliary watertight chamber; 301. Shock-absorbing spring; 303. Fixing base; 305. Connecting base; 306. Limit screw; 307. Adjusting base; 308. Adjusting set screw. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1 to 4 As shown, the present invention provides an underwater gamma spectrometer, including a detection module 1 for monitoring gamma rays, and a watertight cylinder 2. A ring-shaped limiting support block 5 is slidably sleeved inside the watertight cylinder 2, and the detection module 1 is disposed inside the limiting support block 5. An elastic damping structure 3 connected to the inner wall of the watertight cylinder 2 is provided on the limiting support block 5.

[0030] The watertight cylinder 2 includes a first auxiliary watertight chamber 201, a main watertight chamber 202, and a second auxiliary watertight chamber 203. The first auxiliary watertight chamber 201 and the second auxiliary watertight chamber 203 are both fixedly connected to the two ends of the main watertight chamber 202 by flanges. The wall thickness of the first auxiliary watertight chamber 201 and the second auxiliary watertight chamber 203 is less than the wall thickness of the main watertight chamber 202. The limiting support block 5 is set inside the main watertight chamber 202.

[0031] In the technical solution of this application, during installation, the detection module 1 is installed in the limiting support block 5, and then the limiting support block 5 is inserted into the main watertight chamber 202 and connected to the elastic damping structure 3. Subsequently, the first auxiliary watertight chamber 201 and the second auxiliary watertight chamber 203 are connected to the two ends of the main watertight chamber 202, and the installation of the entire equipment is completed.

[0032] In actual use, the entire device is placed in the ocean, and the detection module 1 monitors the gamma rays in the ocean and transmits the information to the corresponding equipment.

[0033] Compared to traditional gamma spectrometers, this application adopts a three-section outer shell formed by sequentially connecting a first auxiliary watertight chamber 201, a main watertight chamber 202, and a second auxiliary watertight chamber 203. This achieves modular assembly, reduces processing difficulty, facilitates assembly, maintenance, and optimization of the functional characteristics of each section. Furthermore, the wall thickness of the first auxiliary watertight chamber 201 and the second auxiliary watertight chamber 203 is less than that of the main watertight chamber 202. The main watertight chamber 202 ensures the structural strength of the overall equipment, while the reduction of the wall thickness of the first auxiliary watertight chamber 201 and the second auxiliary watertight chamber 203 reduces the shielding effect on gamma rays, thereby enhancing the monitoring effect of gamma rays and the accuracy of the monitoring results.

[0034] In addition, the elastic damping structure 3 buffers and dampes the limiting support block 5, thereby buffering and damping the detection module 1. Since the elastic damping structure 3 undergoes elastic deformation during buffering and damping, it avoids the problem of reduced seismic resistance of the entire equipment due to plastic deformation, thus ensuring the seismic resistance of the entire equipment and ensuring the stable operation of the entire equipment.

[0035] Furthermore, the first auxiliary watertight chamber 201, the main watertight chamber 202, and the second auxiliary watertight chamber 203 can all be made of TC4 titanium alloy (Ti-6Al-4V) as the main material. This material has excellent corrosion resistance and high strength, which can further improve the environmental adaptability of the entire equipment and is more suitable for underwater high-pressure environments. Alternatively, other materials with similar properties can also be used.

[0036] The detection module 1 includes a detector crystal 101, a photoelectric conversion module 102, a detector multi-channel pulse amplitude analyzer 103, and a data acquisition circuit board 104 connected in sequence. The detector crystal 101 is located in the second auxiliary watertight chamber 203. The photoelectric conversion module 102, the detector multi-channel pulse amplitude analyzer 103, and the data acquisition circuit board 104 are all located in the main watertight chamber 202. A limit support block 5 is provided in the main watertight chamber 202, and the detector crystal 101, the photoelectric conversion module 102, the detector multi-channel pulse amplitude analyzer 103, and the data acquisition circuit board 104 are all fixed on the ring-shaped limit support block 5.

[0037] In this embodiment, the detector crystal 101, photoelectric conversion module 102, detector multichannel pulse amplitude analyzer 103, and data acquisition circuit board 104 are all existing technologies, and their principles will not be elaborated here.

[0038] During use, the detector crystal 101 monitors the surrounding environment. Gamma rays in the water are scattered by the water and pass through the watertight chamber into the detector crystal 101 to generate light signals. The light signals are converted into electrical signals by the photoelectric conversion module 102. The detector multi-channel pulse amplitude analyzer 103 receives the electrical signals and converts them into energy spectrum data. Finally, the data information is collected by the data acquisition circuit board 104, saved, and transmitted to the outside.

[0039] The limiting support block 5 is provided with a circuit board mounting base, and the data acquisition circuit board 104 is mounted on the circuit board mounting base.

[0040] By setting a circuit board mounting base inside the limiting support block 5 to stably mount the data acquisition circuit board 104, the stability of the data acquisition circuit board 104 during use is ensured, thereby ensuring the stability of data acquisition.

[0041] The end of the first watertight compartment 201 is provided with a watertight connector 4 for connecting external equipment.

[0042] The watertight connector 4 is an interface used to connect corresponding external devices. It is a general-purpose interface used to connect to power and to collect and debug information. It can also switch the debugging information channel to a data communication channel as a backup for the data communication channel to ensure the stability of data transmission.

[0043] The elastic damping structure 3 includes a damping spring 301 and a rubber bushing. One end of the limiting support block 5 is fixed to a fixed seat 303 by bolts, and the damping spring 301 is set on the side of the fixed seat 303 away from the data acquisition circuit board 104. A connecting seat 305 is fixedly connected at the connection between the main watertight chamber 202 and the first auxiliary watertight chamber 201. Multiple limiting screws 306 are evenly arranged on the connecting seat 305, and one end of each limiting screw 306 passes through the connecting seat 305 and slides into the fixed seat 303. An adjusting seat 307 is slidably sleeved on the multiple limiting screws 306. The damping spring 301 is set between the fixed seat 303 and the connecting seat 305. The rubber bushing is set inside the second auxiliary watertight chamber 203 and contacts the detector crystal 101.

[0044] When the watertight cylinder 2 is subjected to vibration, the high-frequency vibration is attenuated by the rubber bushing. When the limiting support block 5 is subjected to vibration, the limiting support block 5 drives the detector crystal 101, photoelectric conversion module 102, detector multi-channel pulse amplitude analyzer 103 and data acquisition circuit board 104 to move synchronously. One end of the limiting support block 5 drives the fixed seat 303 to compress the shock-absorbing spring 301. At the same time, the shock-absorbing spring 301 compresses the adjusting seat 307 to move along multiple limiting screws 306. The shock absorption is achieved by the elastic deformation of the shock-absorbing spring 301. The shock-absorbing spring 301 can reset itself, avoiding the problem of plastic deformation of the anti-vibration structure such as foam glue in the transmission gamma spectrometer after long-term use, thus avoiding the problem of weakened anti-vibration capability.

[0045] Furthermore, the connecting seat 305 is always in a fixed state, while multiple limiting screws 306 are inserted into the fixed seat 303 after passing through the adjusting seat 307, thereby restricting the fixed seat 303 from rotating, which in turn restricts the limiting support block 5 from rotating and translating within the watertight cylinder 2, thereby reducing the impact of mechanical vibration on the internal detection module 1.

[0046] The connecting seat 305 is threaded with an adjusting screw 308, and one end of the adjusting screw 308 abuts against the adjusting seat 307.

[0047] By rotating the adjusting screw 308, the length of the adjusting screw 308 extending out of the connecting seat 305 changes, which in turn compresses the adjusting seat 307 to move axially along the limiting screw 306, or causes the adjusting seat 307 to move axially along the limiting screw 306 under the elastic force of the damping spring 301, so that the initial deformation of the damping spring 301 can be precisely adjusted to match the vibration frequency of different working conditions.

[0048] The first auxiliary watertight compartment 201 and the main watertight compartment 202 are fixedly connected by a flange seal, and the main watertight compartment 202 and the second auxiliary watertight compartment 203 are fixedly connected by a flange seal.

[0049] The connecting seat 305 includes an annular plate and a cylindrical body, with the outer circular surface of the cylindrical body fitting against the inner wall of the annular plate. The annular plate abuts against the flange on the first auxiliary watertight compartment 201 and is located between the flange and the end of the main watertight compartment 202.

[0050] That is, when the connecting seat 305 is fixed, it is clamped between the flange and the end of the main watertight compartment 202.

[0051] The flange and the annular plate on the first watertight compartment 201 are sealed by a double O-ring fluororubber composite seal. The annular plate and the main watertight compartment 202 are sealed by a double O-ring fluororubber composite seal. The flanges on the main watertight compartment 202 and the second watertight compartment 203 are also sealed by a double O-ring fluororubber composite seal.

[0052] Double O-rings are used to seal the flanges and annular plates on the first auxiliary watertight compartment 201, the annular plates and the main watertight compartment 202, and the flanges on the main watertight compartment 202 and the second auxiliary watertight compartment 203. This ensures a good seal, and the double O-rings have excellent corrosion resistance and weather resistance, ensuring the safety of underwater operations.

[0053] Furthermore, the double O-ring fluororubber can be replaced with other sealing rings with similar properties, as long as they meet the actual usage requirements.

[0054] Multiple inner circular grooves 6 are evenly distributed on the inner wall of the second watertight compartment 203.

[0055] By creating an inner circular groove 6 on the inner wall of the second watertight chamber 203, the wall thickness of the second watertight chamber 203 is further reduced, making it easier for gamma rays to pass through. This further reduces the shielding effect on gamma rays and improves the monitoring effect of the detector crystal 101 inside the second watertight chamber 203 on gamma rays. Moreover, the setting of the inner circular groove 6 does not reduce the strength of the second watertight chamber 203. At the same time, the inner circular groove 6 can enhance the compressive, flexural and shear strength of the second watertight chamber 203.

[0056] Multiple cylindrical reinforcing rods 7 are provided on the inner sidewall of the inner circular groove 6, and all of the multiple cylindrical reinforcing rods 7 are in contact with the inner bottom of the inner circular groove 6.

[0057] By setting multiple cylindrical reinforcing rods 7 that contact the bottom of the inner circular groove 6 (i.e., the side of the inner circular groove 6 facing the interior of the second auxiliary watertight chamber 203, not the annular inner wall of the inner circular groove 6), the structural strength of the inner circular groove 6 is further enhanced. Secondly, the gap between adjacent cylindrical reinforcing rods 7 can also allow γ-rays to pass through, ensuring the monitoring effect of γ-rays.

[0058] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. An underwater gamma-ray spectrometer, comprising a detection module (1) for monitoring gamma rays, characterized in that, It also includes a watertight cylinder (2), in which a ring-shaped limiting support block (5) is slidably sleeved, and the detection module (1) is set inside the limiting support block (5). The limiting support block (5) is provided with an elastic damping structure (3) connected to the inner wall of the watertight cylinder (2). The watertight cylinder (2) includes a first auxiliary watertight chamber (201), a main watertight chamber (202), and a second auxiliary watertight chamber (203). The first auxiliary watertight chamber (201) and the second auxiliary watertight chamber (203) are both fixedly connected to both ends of the main watertight chamber (202) by flanges. The wall thickness of the first auxiliary watertight chamber (201) and the second auxiliary watertight chamber (203) is less than the wall thickness of the main watertight chamber (202). The limiting support block (5) is set inside the main watertight chamber (202). The detection module (1) includes a detector crystal (101), a photoelectric conversion module (102), a detector multi-channel pulse amplitude analyzer (103), and a data acquisition circuit board (104) connected in sequence. The detector crystal (101) is located in the second auxiliary watertight chamber (203). The photoelectric conversion module (102), the detector multi-channel pulse amplitude analyzer (103), and the data acquisition circuit board (104) are all located in the main watertight chamber (202). The detector crystal (101), the photoelectric conversion module (102), the detector multi-channel pulse amplitude analyzer (103), and the data acquisition circuit board (104) are all fixed on a ring-shaped limiting support block (5).

2. The underwater-specific gamma spectrometer according to claim 1, characterized in that, The limiting support block (5) is provided with a circuit board mounting base, and the data acquisition circuit board (104) is mounted on the circuit board mounting base.

3. The underwater-specific gamma spectrometer according to claim 1, characterized in that, The end of the first watertight compartment (201) is provided with a watertight connector (4) for connecting external equipment.

4. The underwater-specific gamma spectrometer according to claim 1, characterized in that, The elastic damping structure (3) includes a damping spring (301) and a rubber bushing. One end of the limiting support block (5) is fixed to a fixed seat (303) by bolts. The damping spring (301) is located on the fixed seat (303) on the side away from the data acquisition circuit board (104). A connecting seat (305) is fixedly connected at the connection between the main watertight chamber (202) and the first auxiliary watertight chamber (201). A plurality of limiting screws (306) are evenly arranged on the connecting seat (305). One end of each of the limiting screws (306) passes through the connecting seat (305) and slides into the fixed seat (303). An adjusting seat (307) is slidably sleeved on the plurality of limiting screws (306). The damping spring (301) is located between the fixed seat (303) and the connecting seat (305). The rubber bushing is located inside the second auxiliary watertight chamber (203) and contacts the detector crystal (101).

5. The underwater-specific gamma spectrometer according to claim 4, characterized in that, The connecting seat (305) is threaded with an adjusting screw (308), and one end of the adjusting screw (308) abuts against the adjusting seat (307).

6. The underwater-specific gamma spectrometer according to claim 4, characterized in that, The first auxiliary watertight compartment (201) and the main watertight compartment (202) are fixedly connected by a flange seal, and the main watertight compartment (202) and the second auxiliary watertight compartment (203) are fixedly connected by a flange seal. The connecting seat (305) includes an annular plate and a cylindrical body, and the outer circular surface of the cylindrical body is in contact with the inner wall of the annular plate. The annular plate abuts against the flange on the first auxiliary watertight compartment (201) and is located between the flange and the end of the main watertight compartment (202).

7. The underwater-specific gamma spectrometer according to claim 6, characterized in that, The flange and the annular plate on the first auxiliary watertight compartment (201) are sealed by a double O-ring fluororubber composite seal. The annular plate and the main watertight compartment (202) are sealed by a double O-ring fluororubber composite seal. The flanges on the main watertight compartment (202) and the second auxiliary watertight compartment (203) are also sealed by a double O-ring fluororubber composite seal.

8. The underwater-specific gamma spectrometer according to claim 1, characterized in that, Multiple inner circular grooves (6) are evenly provided on the inner wall of the second watertight compartment (203).

9. The underwater-specific gamma spectrometer according to claim 8, characterized in that, Multiple cylindrical reinforcing rods (7) are provided on the inner sidewall of the inner circular groove (6), and all of the multiple cylindrical reinforcing rods (7) are in contact with the inner bottom of the inner circular groove (6).

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