Underwater special gamma spectrometer

Abstract

The invention discloses an underwater special gamma spectrometer, and relates to the technical field of gamma spectrometers, the underwater special gamma spectrometer comprises a detection module used for monitoring gamma rays, the underwater special gamma spectrometer also comprises a watertight cylinder, an annular limiting support block is slidably sleeved in the watertight cylinder, and the detection module is arranged in the limiting support block. The first auxiliary watertight compartment, the main watertight compartment and the second auxiliary watertight compartment are connected in a three-section mode, and different wall thicknesses are arranged, so that modular assembly can be achieved, and the strength of the whole device can be guaranteed through the main watertight compartment; the weight is controlled by reducing the wall thickness of the first auxiliary watertight compartment and the second auxiliary watertight compartment, the shielding effect on gamma rays is reduced, the monitoring effect is improved, the detection module is buffered and damped through elastic deformation of the elastic damping structure, plastic deformation is avoided, and the anti-seismic capacity of the detection module is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of energy spectrometers, and in particular to a special underwater gamma spectrometer. Background Art

[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 some limitations. The currently used pressure-resistant shell has a low transmittance of gamma rays per unit thickness. Although polymer materials have high transmittance, their pressure resistance is poor. The pressure resistance needs to be improved by increasing the thickness. During processing, it is difficult to produce a shell that meets the pressure strength requirements and does not deform. However, if the wall thickness is further increased, the attenuation of gamma rays will be further increased. Secondly, rubber bushings and foam glue are generally used for shock absorption. However, the deployment period of marine instruments is very long, which is measured in years. However, simply using materials such as rubber bushings and foam glue for shock absorption will cause plastic deformation and reduce the seismic resistance of the instrument and equipment. Therefore, the shell of the existing gamma spectrometer has the problem of low gamma ray transmittance and the seismic resistance of the gamma spectrometer will decrease over time. Summary of the Invention

[0004] The purpose of the present invention is to provide a special underwater gamma spectrometer to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: A dedicated underwater gamma spectrometer, comprising a detection module for monitoring gamma rays, and a watertight cylinder, wherein an annular position-limiting support block is slidably sleeved within the watertight cylinder, and the detection module is disposed within the position-limiting support block, wherein the position-limiting support block is provided with an elastic shock-absorbing structure connected to the inner side wall of the watertight cylinder; The watertight cylinder includes a first secondary watertight compartment, a main watertight compartment and a second secondary watertight compartment, and the first secondary watertight compartment and the second secondary watertight compartment are fixedly connected to the two ends of the main watertight compartment through flanges. The wall thickness of the first secondary watertight compartment and the second secondary watertight compartment are both smaller than the wall thickness of the main watertight compartment, and the limiting support block is arranged in the main watertight compartment.

[0006] As a preferred solution 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 that are electrically connected in sequence, and the detector crystal is located in the second secondary watertight compartment, the photoelectric conversion module, the detector multi-channel pulse amplitude analyzer and the data acquisition circuit board are all arranged in the main watertight compartment, a limiting support block is provided in the main watertight compartment, and the detector crystal, photoelectric conversion module, detector multi-channel pulse amplitude analyzer and data acquisition circuit board are all fixed on the annular limiting support block.

[0007] As a preferred solution of the present invention, a circuit board mounting base is provided on the position-limiting support block, and the data acquisition circuit board is provided on the circuit board mounting base.

[0008] As a preferred solution of the present invention, the end of the first secondary watertight compartment is provided with a watertight connector for external equipment.

[0009] As a preferred solution of the present invention, the elastic shock-absorbing structure includes a shock-absorbing spring and a rubber bushing, one end of the limit support block is fixed to a fixing seat by a bolt, and the shock-absorbing spring is arranged on the side of the fixing seat away from the data acquisition circuit board, the connection between the main watertight compartment and the first secondary watertight compartment is fixedly connected to a connecting seat, a plurality of limit screws are evenly arranged on the connecting seat, and one end of the plurality of limit screws passes through the connecting seat to be slidably plugged into the fixed seat, an adjustment seat is commonly slidably sleeved on the plurality of limit screws, and the shock-absorbing spring is arranged between the fixing seat and the connecting seat, and the rubber bushing is arranged in the second secondary watertight compartment and in contact with the detector crystal.

[0010] As a preferred solution of the present invention, an adjusting screw is threadedly connected to the connecting seat, and one end of the adjusting screw is against the adjusting seat.

[0011] As a preferred embodiment of the present invention, the first secondary watertight compartment and the main watertight compartment are sealed and fixedly connected via a flange, and the main watertight compartment and the second secondary watertight compartment are sealed and fixedly connected via a flange; 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 side wall of the annular plate. The annular plate is against the flange on the first secondary watertight compartment and is located between the flange and the end of the main watertight compartment.

[0012] As a preferred solution of the present invention, the flange on the first secondary watertight compartment and the annular plate are compositely sealed by a double O-type fluororubber ring, the annular plate and the main watertight compartment are compositely sealed by a double O-type fluororubber ring, and the flanges on the main watertight compartment and the second secondary watertight compartment are also compositely sealed by a double O-type fluororubber ring.

[0013] As a preferred solution of the present invention, a plurality of inner circular grooves are evenly formed on the inner side wall of the second secondary watertight compartment.

[0014] As a preferred solution of the present invention, a plurality of columnar reinforcing rods are provided on the inner side wall of the inner circular groove, and the plurality of columnar reinforcing rods are in contact with the inner bottom of the inner circular groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention connects the first secondary watertight compartment, the main watertight compartment, and the second secondary watertight compartment in three sections, and sets different wall thicknesses for each section. This not only enables modular assembly, but also ensures the strength of the entire device through the main watertight compartment. The weight is controlled by reducing the wall thickness of the first secondary watertight compartment and the second secondary watertight compartment, and the shielding effect on gamma rays is reduced, thereby improving the monitoring effect. In addition, the elastic deformation of the elastic shock-absorbing structure is used to buffer and absorb shock to the detection module, and no plastic deformation is generated, thereby ensuring the seismic resistance of the detection module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0017] Figure 1 A structural diagram of a dedicated underwater gamma spectrometer is provided for an embodiment of the present invention; Figure 2 A schematic cross-sectional view of a dedicated underwater gamma spectrometer is provided for an embodiment of the present invention; Figure 3 A schematic diagram of the structure of the second secondary watertight compartment is provided for an embodiment of the present invention Figure 4 Provided for embodiments of the present invention Figure 3 An enlarged schematic diagram of the structure of part A is shown in FIG.

[0018] The numbers in the figure represent the following: 1. Detection module; 2. Watertight cylinder; 3. Elastic shock-absorbing structure; 4. Watertight connector; 5. Limit support block; 6. Inner groove; 7. Column reinforcement rod; 101. Detector crystal; 102. Photoelectric conversion module; 103. Detector multi-channel pulse amplitude analyzer; 104. Data acquisition circuit board; 201. First secondary watertight compartment; 202. Main watertight compartment; 203. Second secondary watertight compartment; 301. Shock-absorbing spring; 303. Fixing seat; 305. Connecting seat; 306. Limit screw; 307. Adjusting seat; 308. Adjusting top screw. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figures 1 to 4 As shown, the present invention provides an underwater gamma spectrometer, comprising a detection module 1 for monitoring gamma rays, and a watertight cylinder 2. An annular position-limiting support block 5 is slidably sleeved in the watertight cylinder 2, and the detection module 1 is disposed in the position-limiting support block 5. The position-limiting support block 5 is provided with an elastic shock-absorbing structure 3 connected to the inner wall of the watertight cylinder 2. The watertight cylinder 2 includes a first secondary watertight compartment 201, a main watertight compartment 202 and a second secondary watertight compartment 203, and the first secondary watertight compartment 201 and the second secondary watertight compartment 203 are fixedly connected to the two ends of the main watertight compartment 202 by flanges. The wall thickness of the first secondary watertight compartment 201 and the second secondary watertight compartment 203 is smaller than that of the main watertight compartment 202, and the limiting support block 5 is arranged in the main watertight compartment 202.

[0021] During installation of the technical solution of the present application, 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 compartment 202 and connected to the elastic shock-absorbing structure 3, and then the first secondary watertight compartment 201 and the second secondary watertight compartment 203 are connected to the two ends of the main watertight compartment 202, at which point the installation of the entire equipment is completed.

[0022] In actual use, the entire device is placed in the ocean, and the gamma rays in the ocean are monitored by the detection module 1, and the information is transmitted to the corresponding device.

[0023] Compared with the traditional gamma spectrometer, the present application adopts a three-section shell formed by connecting the first secondary watertight compartment 201, the main watertight compartment 202 and the second secondary watertight compartment 203 in sequence, which realizes modular assembly and reduces the difficulty of processing, facilitates assembly and maintenance, and optimizes the functional characteristics of each section. Secondly, the wall thickness of the first secondary watertight compartment 201 and the second secondary watertight compartment 203 is less than the wall thickness of the main watertight compartment 202. The structural strength of the overall equipment is ensured by the main watertight compartment 202, and the wall thickness of the first secondary watertight compartment 201 and the second secondary watertight compartment 203 is reduced, which reduces the shielding effect of gamma rays, thereby enhancing the monitoring effect of gamma rays and the accuracy of the monitoring results.

[0024] In addition, the elastic shock-absorbing structure 3 is used to buffer and dampen the limit support block 5, thereby buffering and damping the detection module 1. Since the elastic shock-absorbing structure 3 undergoes elastic deformation during buffering and damping, the problem of reduced shock resistance of the entire equipment due to plastic deformation is avoided, thereby ensuring the shock resistance of the entire equipment and then ensuring that the entire equipment can operate stably.

[0025] Furthermore, the first secondary watertight compartment 201, the main watertight compartment 202 and the second secondary watertight compartment 203 can all use 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. Other corresponding materials with similar properties can also be used.

[0026] 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 which are electrically connected in sequence, and the detector crystal 101 is located in the second secondary watertight compartment 203, the photoelectric conversion module 102, the detector multi-channel pulse amplitude analyzer 103 and the data acquisition circuit board 104 are all arranged in the main watertight compartment 202, and a limiting support block 5 is provided in the main watertight compartment 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 annular limiting support block 5.

[0027] In this embodiment, 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 existing technologies, and the principles thereof will not be elaborated on herein.

[0028] When in use, the detector crystal 101 monitors the surrounding environmental information. The gamma rays in the water body are scattered by the water body, pass through the watertight compartment and enter the detector crystal 101 to generate light signals, which 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 through the data acquisition circuit board 104, and the data is saved and transmitted to the outside.

[0029] A circuit board mounting base is provided on the limiting support block 5 , and the data acquisition circuit board 104 is provided on the circuit board mounting base.

[0030] By arranging 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.

[0031] A watertight connector 4 for external equipment is provided at the end of the first watertight compartment 201 .

[0032] The watertight connector 4 is an interface for connecting to corresponding external equipment. It is a universal interface for accessing power, collecting data and debugging information. The channel of this debugging information can also be switched to a data communication channel as a backup for the data communication channel to ensure the stability of data transmission.

[0033] The elastic shock-absorbing structure 3 includes a shock-absorbing spring 301 and a rubber bushing. One end of the limiting support block 5 is fixed to a fixing seat 303 by bolts, and the shock-absorbing spring 301 is arranged on the side of the fixing seat 303 away from the data acquisition circuit board 104. The connection between the main watertight compartment 202 and the first secondary watertight compartment 201 is fixedly connected to a connecting seat 305. A plurality of limiting screws 306 are evenly arranged on the connecting seat 305, and one end of the plurality of limiting screws 306 all pass through the connecting seat 305 to be slidably plugged into the fixing seat 303. An adjustment seat 307 is slidably sleeved on the plurality of limiting screws 306, and the shock-absorbing spring 301 is arranged between the fixing seat 303 and the connecting seat 305. The rubber bushing is arranged in the second secondary watertight compartment 203 and in contact with the detector crystal 101.

[0034] When the watertight cylinder 2 is vibrated, the high-frequency vibration is attenuated by the rubber bushing. After the limit support block 5 is vibrated, the limit support block 5 drives the detector crystal 101, the photoelectric conversion module 102, the detector multi-channel pulse amplitude analyzer 103 and the data acquisition circuit board 104 to move synchronously. One end of the limit support block 5 drives the fixing seat 303 to squeeze the shock-absorbing spring 301. At the same time, the shock-absorbing spring 301 squeezes the adjustment seat 307 and moves along the multiple limit screws 306. The elastic deformation of the shock-absorbing spring 301 is used for shock absorption and buffering. The shock-absorbing spring 301 can reset itself, avoiding the problem of plastic deformation of the anti-seismic structures such as foam rubber in the transmission gamma spectrometer due to long-term use, thereby avoiding the problem of weakened anti-seismic ability.

[0035] The connecting seat 305 is always in a fixed state, and multiple limit screws 306 are inserted into the fixing seat 303 after passing through the adjustment seat 307, thereby limiting the rotation of the fixing seat 303, and then limiting the rotation and translation of the limit support block 5 in the watertight cylinder 2, thereby reducing the impact of mechanical vibration on the internal detection module 1.

[0036] An adjusting screw 308 is threadedly connected to the connecting seat 305 , and one end of the adjusting screw 308 abuts against the adjusting seat 307 .

[0037] By rotating the adjusting screw 308, the length of the adjusting screw 308 extending out of the connecting seat 305 changes, and then the adjusting seat 307 is squeezed to move along the axial direction of the limit screw 306, or the adjusting seat 307 is moved along the axial direction of the limit screw 306 under the elastic force of the shock-absorbing spring 301, so that the initial deformation of the shock-absorbing spring 301 can be accurately adjusted to match the vibration frequency of different working conditions.

[0038] The first secondary watertight compartment 201 and the main watertight compartment 202 are fixedly connected by flange sealing, and the main watertight compartment 202 and the second secondary watertight compartment 203 are fixedly connected by flange sealing.

[0039] The connecting seat 305 includes an annular plate and a cylindrical body, and the outer circumferential surface of the cylindrical body is in contact with the inner wall of the annular plate. The annular plate is against the flange on the first secondary watertight compartment 201 and is located between the flange and the end of the main watertight compartment 202.

[0040] That is, the connecting seat 305 is clamped between the flange and the end of the main watertight compartment 202 when fixed.

[0041] The flange and the annular plate on the first secondary watertight compartment 201 are compositely sealed by double O-type fluororubber rings, the annular plate and the main watertight compartment 202 are compositely sealed by double O-type fluororubber rings, and the flanges on the main watertight compartment 202 and the second secondary watertight compartment 203 are also compositely sealed by double O-type fluororubber rings.

[0042] Double O-type fluororubber rings are used to seal between the flange and the annular plate on the first secondary watertight compartment 201, between the annular plate and the main watertight compartment 202, and between the main watertight compartment 202 and the flange on the second secondary watertight compartment 203. This not only ensures the sealing effect, but also the double O-type fluororubber rings have excellent corrosion resistance and weather resistance, ensuring the safety of underwater operations.

[0043] Furthermore, the double O-type fluororubber ring can also be replaced with other sealing rings with similar characteristics, as long as it meets actual usage requirements.

[0044] A plurality of inner circular grooves 6 are evenly formed on the inner side wall of the second secondary watertight compartment 203 .

[0045] By providing an inner circular groove 6 on the inner side wall of the second secondary watertight compartment 203, the wall thickness of part of the second secondary watertight compartment 203 is further reduced, making it easier for gamma rays to pass through, further reducing the shielding effect on gamma rays, and improving the monitoring effect of the detector crystal 101 in the second secondary watertight compartment 203 on gamma rays. The provision of the inner circular groove 6 does not reduce the strength of the second secondary watertight compartment 203. At the same time, the inner circular groove 6 can enhance the compressive, flexural and shear strengths of the second secondary watertight compartment 203.

[0046] A plurality of columnar reinforcing rods 7 are provided on the inner side wall of the inner circular groove 6 , and the plurality of columnar reinforcing rods 7 are all in contact with the inner bottom of the inner circular groove 6 .

[0047] By providing a plurality of cylindrical reinforcing rods 7 in contact with the inner bottom of the inner circular groove 6 (i.e., the side of the inner circular groove 6 facing the interior of the second secondary watertight compartment 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 gaps between adjacent cylindrical reinforcing rods 7 can also allow gamma rays to pass through, thereby ensuring the monitoring effect of gamma rays.

[0048] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. An underwater gamma spectrometer, comprising a detection module (1) for monitoring gamma rays, characterized in that: It also comprises a watertight cylinder (2), wherein an annular position-limiting support block (5) is slidably sleeved in the watertight cylinder (2), and the detection module (1) is arranged in the position-limiting support block (5), and an elastic shock-absorbing structure (3) connected to the inner side wall of the watertight cylinder (2) is arranged on the position-limiting support block (5); The watertight cylinder (2) comprises a first secondary watertight compartment (201), a main watertight compartment (202) and a second secondary watertight compartment (203), and the first secondary watertight compartment (201) and the second secondary watertight compartment (203) are both fixedly connected to the two ends of the main watertight compartment (202) via flanges, the wall thickness of the first secondary watertight compartment (201) and the second secondary watertight compartment (203) are both smaller than the wall thickness of the main watertight compartment (202), and the limiting support block (5) is arranged in the main watertight compartment (202).

2. The underwater gamma spectrometer according to claim 1, characterized in that: The detection module (1) comprises a detector crystal (101), a photoelectric conversion module (102), a detector multi-channel pulse amplitude analyzer (103) and a data acquisition circuit board (104) which are electrically connected in sequence, and the detector crystal (101) is located in the second secondary watertight compartment (203), the photoelectric conversion module (102), the detector multi-channel pulse amplitude analyzer (103) and the data acquisition circuit board (104) are all arranged in the main watertight compartment (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 a ring-shaped limiting support block (5).

3. The underwater gamma spectrometer according to claim 2, characterized in that: A circuit board mounting base is provided on the position-limiting support block (5), and the data acquisition circuit board (104) is provided on the circuit board mounting base.

4. The underwater gamma spectrometer according to claim 1, characterized in that: A watertight connector (4) for external equipment is provided at the end of the first watertight compartment (201).

5. The underwater gamma spectrometer according to claim 2, characterized in that: The elastic shock absorbing structure (3) comprises a shock absorbing spring (301) and a rubber bushing; one end of the limit support block (5) is fixed with a fixing seat (303) by means of bolts; the shock absorbing spring (301) is arranged on a side of the fixing seat (303) away from the data acquisition circuit board (104); a connecting seat (305) is fixedly connected to the connection between the main watertight compartment (202) and the first secondary watertight compartment (201); a plurality of limit screws (306) are evenly arranged on the connecting seat (305); one end of the plurality of limit screws (306) passes through the connecting seat (305) to be slidably plugged with the fixing seat (303); an adjustment seat (307) is slidably sleeved on the plurality of limit screws (306); the shock absorbing spring (301) is arranged between the fixing seat (303) and the connecting seat (305); and the rubber bushing is arranged in the second secondary watertight compartment (203) and in contact with the detector crystal (101).

6. The underwater gamma spectrometer according to claim 5, characterized in that: An adjusting top screw (308) is threadedly connected to the connecting seat (305), and one end of the adjusting top screw (308) abuts against the adjusting seat (307).

7. The underwater gamma spectrometer according to claim 5, characterized in that: The first secondary watertight compartment (201) and the main watertight compartment (202) are fixedly connected via a flange seal, and the main watertight compartment (202) and the second secondary watertight compartment (203) are fixedly connected via a flange seal; The connecting seat (305) comprises an annular plate and a columnar body, wherein the outer circumferential surface of the columnar body fits against the inner wall of the annular plate, the annular plate abuts against the flange on the first secondary watertight compartment (201), and is located between the flange and the end of the main watertight compartment (202).

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

9. The underwater gamma spectrometer according to claim 1, characterized in that: A plurality of inner circular grooves (6) are evenly arranged on the inner side wall of the second secondary watertight compartment (203).

10. The underwater gamma spectrometer according to claim 9, characterized in that: A plurality of columnar reinforcing rods (7) are arranged on the inner side wall of the inner circular groove (6), and the plurality of columnar reinforcing rods (7) are all in contact with the inner bottom of the inner circular groove (6).

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