Radioactive source detection positioning instrument

Abstract

The invention relates to a radioactive source detection positioning instrument, and belongs to the technical field of radioactive source detection and positioning. A detector; the incidence hole adjusting mechanism comprises a sliding assembly and an incidence hole adjusting assembly which can be partially arranged in the sliding assembly. The incident hole adjusting assembly comprises a forming piece which is provided with a first contact surface, a second contact surface and a clamping step; when in the first position, the first contact surface is in contact with the detection piece and forms a first incidence hole, and a gap is formed between the second contact surface and the detection piece; a first linear distance is formed between the end part of the forming piece and the end part of the detection piece; when the forming piece is located at the second position, the second contact surface is in contact with the detection piece, the first contact surfaces are close to each other to form a second incident hole, and a second linear distance exists between the end of the forming piece and the end of the detection piece; the aperture of the second incident hole is smaller than that of the first incident hole, and the second linear distance is larger than the first linear distance. Through the mode, the detection position indicators with different apertures can be switched, and the positioning precision is ensured.

Description

Technical Field

[0001] This invention relates to the field of radiation source detection and positioning technology, and in particular to a radiation source detection and positioning instrument. Background Technology

[0002] Gamma radiation sources are widely used in many technological fields such as industry, medicine, and scientific research due to their strong penetrating power; however, their uncontrolled or lost operation also poses a significant radiation safety risk. Therefore, rapid and accurate detection and location of radiation sources are crucial.

[0003] Existing radiation source detection and locating instruments are typically equipped with fixed collimators or entrance apertures to define the direction and range of radiation entering the detector. However, this fixed structure has certain limitations. For example, in strong radiation fields, if the entrance aperture is too large, the detector will receive excessive radiation signals, easily leading to detector saturation or damage, and making it difficult to accurately locate the radiation source. Conversely, in weak radiation fields or when precise positioning is required, if the entrance aperture is too small, although it offers good directionality and high positioning accuracy, the signal acquisition efficiency is low, potentially resulting in excessively long detection times or the inability to effectively detect weak radiation signals.

[0004] Furthermore, in the two example scenarios mentioned above, the search direction may need to be adjusted multiple times during the process of locating the radiation source, and the operators may be exposed to radiation for too long, resulting in significant harm to the operators.

[0005] Therefore, there is an urgent need for a detection and positioning instrument that can flexibly switch between different apertures according to the actual radiation field intensity and detection task requirements, so as to balance detection efficiency and positioning accuracy, protect the detector from damage by strong radiation, ensure the safety of operators, and reduce harm to operators. Summary of the Invention

[0006] To address the aforementioned problems in the prior art, the present invention provides a radiation source detection and locating instrument, comprising: Main body; The detector is fixedly installed inside the main body structure; An entrance aperture adjustment mechanism is slidably disposed around the outside of the detector to switch between a first position and a second position; when in the first position, the entrance aperture adjustment mechanism is housed within the main body, and when in the second position, a portion of the entrance aperture adjustment mechanism is exposed outside the main body; The entrance aperture adjustment mechanism includes a sliding assembly and an entrance aperture adjustment assembly that can be partially disposed within the sliding assembly; the entrance aperture adjustment assembly includes a plurality of forming members disposed around the detector, each forming member having a first contact surface and a second contact surface that contact the detector, and a retaining step between the first contact surface and the second contact surface; When in the first position, the first contact surface contacts the detector and forms a first entrance hole, and there is a gap between the second contact surface and the detector; at this time, there is a first straight-line distance between the end of the forming member and the end of the detector; When in the second position, the second contact surface contacts the probe, and the first contact surfaces of a plurality of the forming elements approach each other to form a second entrance hole, and there is a second straight-line distance between the end of the forming element and the end of the probe; wherein, the aperture of the second entrance hole is smaller than the aperture of the first entrance hole, and the second straight-line distance is greater than the first straight-line distance.

[0007] In one embodiment, each of the forming elements includes an aperture forming body and a retaining body connected to the aperture forming body, wherein a first contact surface is formed on the aperture forming body and a second contact surface is formed on the retaining body.

[0008] In one embodiment, the holding step has a first guide ramp, which is configured to allow the aperture forming body to move along the first guide ramp until it is clamped onto the probe when the sliding assembly moves from the second position to the first position.

[0009] In one embodiment, the sliding assembly includes a slider and a transparent cover on one end of the slider away from the detector, the slider being configured to move along the length direction under the action of a driving force; The slider has an inner sidewall and a plurality of slots recessed inward from the inner sidewall, the number of slots corresponding to the number of forming elements, so that when the slider is in the first position, a portion of each forming element is accommodated in the slot.

[0010] In one embodiment, the slot has a second guide ramp and a stop portion connected to the second guide ramp, the second guide ramp being configured to provide a guiding effect as the forming elements approach each other, and the stop portion being configured to engage with a protrusion of the forming element to stop the forming elements from approaching each other; When the protrusion engages with the stop portion, the engaging step engages with the end of the detector.

[0011] In one embodiment, the sliding component further includes a plurality of first positioning blocks and second positioning blocks connected to the slider, wherein the first positioning blocks and the second positioning blocks are arranged alternately. The main body is provided with a first mating block and a second mating block that respectively cooperate with the first positioning block and the second positioning block; The first positioning block and / or the first mating block has a first rotary guide slope, and the second positioning block and / or the second mating block has a second rotary guide slope; Both the first and second rotary guide ramps are configured to allow the slider to rotate along the first and second rotary guide ramps.

[0012] In one embodiment, the sliding assembly further includes a driving member connected to the slider, the driving member being configured to drive the slider to move along a length direction to switch between the first position and the second position; The driving component includes a driving body and a connecting rod, one end of which is connected to the driving body and the other end is slidably connected to the sliding component; The slider has a sliding groove at one end near the connecting rod, and the other end of the connecting rod is accommodated in the sliding groove.

[0013] In one embodiment, the sliding assembly further includes an airbag fitted onto the connecting rod; The main body is provided with an air inlet channel and an air outlet channel communicating with the airbag. The air outlet channel is located on one side of the sliding member, and the air inlet channel is located on one side of the driving member. Gas enters the airbag through the air inlet channel. The airbag is compressed as the connecting rod slides toward the slider. Gas then enters the air outlet channel from the airbag and flows toward the slider.

[0014] In one embodiment, the airbag includes a body and a first elastic member disposed within the body, the first elastic member being configured to assist the body in recovering when the connecting rod slides toward the drive member after the body is compressed by sliding toward the slider via the connecting rod.

[0015] In one embodiment, the aperture adjustment mechanism further includes an elastic component connecting the sliding component and the aperture adjustment component. The elastic component includes a second elastic element disposed along the height direction. One end of the second elastic element is connected to the sliding component, and the other end is connected to the aperture adjustment component. The second elastic element is configured to continuously apply a biasing force to the inlet adjustment assembly.

[0016] The beneficial effects of this invention are reflected in the fact that, by providing an entrance aperture adjustment mechanism on the outside of the detector, the entrance aperture adjustment mechanism can slide relative to the detector to switch between a first position and a second position. In the first position, the entrance aperture adjustment mechanism is housed within the main body; in the second position, a portion of the entrance aperture adjustment mechanism is exposed outside the main body. The entrance aperture adjustment mechanism includes a sliding assembly and an entrance aperture adjustment component partially disposed within the sliding assembly. Each entrance aperture adjustment component includes multiple forming members disposed around the detector. Each forming member has a first contact surface and a second contact surface that contact the detector, and a retaining step exists between the first and second contact surfaces. In the first position, the first contact surface of the forming member contacts the detector and forms a first entrance aperture, and at this time, the forming member… There is a first linear distance between the end of the forming element and the end of the detector; when in the second position, the second contact surface of the forming element contacts the detector, and at this time, the first contact surfaces of several forming elements approach each other to form a second entrance hole, and there is a second linear distance between the end of the forming element and the end of the detector; wherein, the aperture of the second entrance hole is smaller than the aperture of the first entrance hole, and the second linear distance is greater than the first linear distance, so that when the first entrance hole is formed, a wide field of view can be formed to achieve coarse positioning and improve detection efficiency; when the second entrance hole is formed, the aperture of the entrance hole is reduced and the depth of the entrance hole is increased, so as to eliminate the interference of scattered rays and other radiation sources in the vicinity, while improving the sharpness of the angular resolution of the positioning instrument, making the boundary of the detection area of ​​the positioning instrument clearer, thereby achieving fine positioning and improving positioning accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the radiation source detection and locating instrument provided by the present invention; Figure 2 for Figure 1 A cross-sectional schematic diagram; Figure 3 for Figure 2 Partial structural diagram; Figure 4 for Figure 2 Another part of the structural diagram; Figure 5 for Figure 1 Another cross-sectional view; Figure 6 for Figure 1 Another cross-sectional schematic diagram; Figure 7 for Figure 6 Partial structural diagram; Figure 8 This is a partial structural schematic diagram of the radiation source detection and locator provided by the present invention; Figure 9 for Figure 8 A cross-sectional schematic diagram; Figure 10 for Figure 9 Partial structural diagram; Figure 11 for Figure 1 Another cross-sectional schematic diagram.

[0018] Figure label: 1-Main body; 11-Installation section; 12-Disassembly section; 121-Outlet channel; 122-Inlet channel; 123-First mating block; 124-Second mating block; 13-Holding section; 2-Inlet adjustment mechanism; 21-Sliding member; 211-First positioning block; 212-Groove; 213-Sliding groove; 214-Second positioning block; 215-Stop part; 216-Second guide slope; 217-Second positioning surface; 22-Forming member; 221-Inlet forming body; 222-Holding body; 223-Protrusion; 224-First mating surface; 225-First guide slope; 23-Driver; 231-Drive body; 232-Connecting rod; 233-Extrusion ring; 234-Second mating surface; 24-Airbag; 241-Airbag body; 242-First elastic member; 3-Detector; 4-Second elastic element; 5-Glue pad. Detailed Implementation

[0019] 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.

[0020] Example 1: Reference Figures 1-11 A preferred embodiment of the present invention provides a radiation source detection and locator capable of detecting and locating radiation sources to accurately pinpoint their location. The radiation source may be a gamma radiation source, etc., and is not specifically limited herein, depending on the actual situation.

[0021] Specifically, the radiation source detection and locating instrument includes a main body 1 and a detector 3. The main body 1 has a receiving portion, and the detector 3 is fixedly installed inside the receiving portion. The opening of the receiving portion serves as an entrance port for radiation to enter the detector 3. When it is necessary to detect and locate a radiation source, the radiation source detection and locating instrument is activated, and the target location is scanned using the detector 3. If the target radiation source is found, the radiation source detection and locating instrument issues a prompt. This prompt can be an audible prompt or a photoelectric prompt (e.g., a flashing light installed on the main body 1), etc., without specific limitations, depending on the actual situation.

[0022] In this embodiment, the detector 3 can be a scintillator or a semiconductor detector, etc., without specific limitations, depending on the time situation.

[0023] However, in the aforementioned radiation source detection and locating instruments, the aperture of the entrance hole and the distance between the detector 3 and the entrance hole are fixed. This type of radiation source detection and locating instrument can only determine the approximate direction of the radiation source based on changes in the count rate (set on the main body 1, and is a standard setting, which will not be elaborated upon). The entire search process requires multiple adjustments to the search direction, resulting in prolonged exposure of operators to radiation and low detection and locating accuracy.

[0024] To prevent the aforementioned technical problems, the radiation source detection and positioning device in this embodiment further includes an entrance aperture adjustment mechanism 2. This entrance aperture adjustment mechanism 2 is installed within the receiving portion and slidably surrounds the outside of the detector 3 to switch between a first position and a second position. Specifically, in the first position, the entrance aperture adjustment mechanism 2 is housed within the main body 1; in the second position, a portion of the entrance aperture adjustment mechanism 2 is exposed outside the main body 1.

[0025] The entrance aperture adjustment mechanism 2 includes a sliding assembly and an entrance aperture adjustment assembly disposed within the sliding assembly. As described above, the entrance aperture adjustment mechanism 2 can slide relative to the detector 3, and the sliding assembly can also move relative to the detector 3 along its length (indicated by arrow S in the figure), configured to switch between a first position and a second position. In the first position, the sliding assembly is housed within the receiving portion; in the second position, a portion of the sliding assembly is exposed outside the receiving portion. That is, by moving the sliding assembly along its length, the sliding assembly can extend outside the receiving portion or be housed within it.

[0026] An entrance aperture adjustment assembly is sleeved on the detector 3 and connected to the sliding assembly via an elastic component, so that it moves relative to the detector 3 with the sliding assembly. When the sliding assembly is in the first position, the entrance aperture adjustment assembly clamps the detector 3 to its periphery and forms a first entrance aperture, and there is a first linear distance between the end of the entrance aperture adjustment assembly and the end of the detector 3. When the sliding assembly is in the second position, the entrance aperture adjustment assembly is located on one side of the detector 3 along its length to form a second entrance aperture, and there is a second linear distance between the end of the entrance aperture adjustment assembly and the end of the detector 3; wherein the diameter of the second entrance aperture is smaller than the diameter of the first entrance aperture, and the second linear distance is greater than the first linear distance.

[0027] The purpose of this setup is to enable a wide field of view when forming the first entrance aperture for coarse positioning and improved detection efficiency. When forming the second entrance aperture, the aperture diameter is reduced and the depth is increased to eliminate interference from scattered rays and other nearby radioactive sources, while improving the sharpness of the angular resolution of the positioning instrument and making the boundary of the detection area of ​​the positioning instrument clearer, thereby achieving fine positioning and improving positioning accuracy.

[0028] As can be seen from the above, the radiation source detection and positioning instrument with the added entrance aperture adjustment mechanism 2 in this embodiment can adjust both the depth and size of the entrance aperture by sliding the sliding member 21, thereby achieving both coarse and fine positioning functions, thus improving positioning efficiency and positioning accuracy.

[0029] Specifically, the sliding assembly includes a slider 21 and a transparent cover on the end of the slider 21 away from the detector 3. The slider 21 is configured to move along the length direction under the action of a driving force.

[0030] In this embodiment, the sliding member 21 is cylindrical to surround the detector 3. The purpose of making the sliding member 21 cylindrical is to allow a larger volume of radiation to be absorbed by the detector 3 through the entrance aperture during coarse localization detection of the radiation source, thereby reducing the number of times the detection direction needs to be changed and improving detection accuracy. Furthermore, the sliding member 21 is made of W-Ni-Cu / Fe alloy. W-Ni-Cu / Fe alloy is a high-density, high-atomic-number heavy metal with excellent shielding capabilities, further reducing interference from other nearby sources and improving the positioning accuracy of the locator.

[0031] As described above, the detector 3 is located within the sliding assembly. That is, the detector 3 is located within the sliding member 21. Therefore, in order for the radiation to be detected by the detector 3 through the entrance hole, an opening is provided on the sliding member 21, and the transparent member covers the opening. By providing the transparent member, radioactive dust can be prevented from entering the interior of the sliding member 21.

[0032] Furthermore, to ensure the coaxiality of the slider 21 and the detector 3, and to prevent angular errors caused by coaxiality issues when the slider 21 moves from the first position to the second position, thus affecting the positioning accuracy of the radiation source detection and positioning instrument, a first positioning surface is also provided on the main body mechanism 1. Correspondingly, a second positioning surface 217 that cooperates with the first positioning surface is provided on the slider 21. When the slider 21 moves from the first position to the second position, the first positioning surface and the second positioning surface 217 cooperate to ensure the coaxiality of the slider 21 and the detector 3.

[0033] In this embodiment, both the first positioning surface and the second positioning surface 217 are conical surfaces.

[0034] As described above, the slider 21 is configured to move along the length direction under the action of driving force. Therefore, in this embodiment, the slider 21 can also rotate while moving along the length direction, thereby avoiding the problem that the first positioning surface and the second positioning surface 217 will be irregularly worn due to uneven force on the slider 21 during the sliding process, which would reduce the coaxiality of the slider 21 and the detector 3 and affect the positioning accuracy of the positioning instrument.

[0035] The sliding assembly also includes a plurality of first positioning blocks 211 and second positioning blocks 214 connected to the slider 21, with the first positioning blocks 211 and second positioning blocks 214 arranged alternately. Correspondingly, the main body mechanism 1 is provided with a first mating block 123 and a second mating block 124 that respectively cooperate with the first positioning blocks 211 and the second positioning blocks 214. The first positioning block 211 and / or the first mating block 123 have a first rotational guide slope, and the second positioning block 214 and / or the second mating block 124 have a second rotational guide slope; both the first and second rotational guide slopes are configured to allow the slider 21 to rotate along the first and second rotational guide slopes.

[0036] When the first positioning block 211 and the first mating block 123 are in contact, and the second positioning block 214 and the second mating block 124 are in contact, the sliding member 21 can be rotated, which changes the contact area between the first positioning surface and the second positioning surface 217, thus preventing irregular wear between them.

[0037] In order to facilitate the replacement of the first positioning surface and the second positioning surface 217 when they are worn, so as to ensure the positioning accuracy of the radiation source detection and positioning instrument and reduce the maintenance cost of the radiation source detection and positioning instrument, the main body mechanism 1 in this embodiment includes an installation part 11 and a disassembly part 12. The installation part 11 and the disassembly part 12 are detachably connected, so as to facilitate replacement.

[0038] The detachable connection between the mounting part 11 and the disassembly part 12 can be achieved by fastening with fasteners, or by a structure of slots and protrusions, etc., without specific limitations, depending on the actual situation.

[0039] The main body 1 may also include a gripping part 13 connected to the mounting part 11, which facilitates the operator's gripping of the radiation source detection and positioning instrument. In this embodiment, the gripping part 13 is a handle.

[0040] The sliding assembly also includes a drive member 23 connected to the slider 21. The drive member 23 is configured to drive the slider 21 to move along its length to switch between a first position and a second position. The drive member 23 includes a drive body 231 and a connecting rod 232. One end of the connecting rod 232 is connected to the drive body 231, and the other end is slidably connected to the slider 21.

[0041] In this embodiment, the drive body 231 is an electric cylinder. In other embodiments, the drive component 23 may also be a pneumatic cylinder, etc., and is not specifically limited here, depending on the actual situation.

[0042] The connecting rod 232 includes a rod body and a compression ring 233, with the compression ring 233 connected to the end of the rod body near the sliding member 21. Correspondingly, the end of the sliding member 21 near the connecting rod 232 is provided with a sliding groove 213, and the other end of the connecting rod 232 is accommodated in the sliding groove 213. That is, the compression ring 233 is accommodated in the sliding groove 213.

[0043] The sliding assembly also includes an airbag 4, which is sleeved on the connecting rod 232. At this time, the airbag 4 abuts against the compression ring 233. The main body 1 is provided with an air inlet channel 122 and an air outlet channel 121 communicating with the airbag 4. The air outlet channel 121 is located on one side of the sliding member 21, and the air inlet channel 122 is located on one side of the driving member 23. Gas enters the airbag 4 through the air inlet channel 122. The airbag 4 is compressed as the connecting rod 232 slides towards the sliding member 21, and the gas flows from the airbag 4 into the air outlet channel 121 and towards the sliding member 21.

[0044] The airbag 4 includes a body 241 and a first elastic member 242 disposed within the body 241. The first elastic member 242 is configured to assist the body 241 in returning to its original position when the connecting rod 232 slides toward the driving member 23 after the body 241 is compressed by sliding toward the sliding member 21 via the connecting rod 232. In this embodiment, the first elastic member 242 is a return spring.

[0045] When the connecting rod 232 slides toward the slider 21, the capsule 241 is compressed, and gas enters from the gas bag 4 into the gas outlet channel 121 and flows toward the slider 21, thereby purifying the slider 21. This prevents radioactive dust from being carried into the slider 21 when it slides, thus avoiding the generation of pollution sources and ensuring the positioning accuracy of the radioactive source detection and positioning instrument.

[0046] The bladder 241 has multiple protrusions and multiple recesses, with the protrusions and recesses spaced apart. The recesses are connected to the first elastic member 242. The bladder 241 is divided into protrusions and recesses, and the recesses are connected to the first elastic member 242. Therefore, when the first elastic member 242 is compressed, the recesses can contract with the first elastic member 242, thus preventing the bladder 241 from expanding outward and avoiding interference with the movement of the sliding member 21 after the bladder 241 expands, which could lead to the bladder 241 being clamped and damaged.

[0047] A rubber pad 5 is glued to the air outlet channel 121. The rubber pad 5 is interference-fitted with the air outlet channel 121. When the capsule 241 is squeezed, the gas pressure inside the capsule 241 increases before the rubber pad 5 can be opened to release gas. Therefore, the gas outflow at the air outlet channel 121 can be increased, and the cleaning effect of radioactive dust can be improved.

[0048] Furthermore, the rubber pad 5 extends to the outside of the venting channel 121 to contact the sliding member 21; after the sliding member 21 contracts, the rubber pad 5 contacts the sliding member 21 to form a seal, further preventing radioactive dust from entering the interior of the sliding member 21.

[0049] As mentioned above, the compression ring 233 is slidably connected to the sliding member 21. Therefore, when the driving body 231 drives the connecting rod 232 to move in order to drive the compression ring 233 to move, the capsule 241 is compressed, while the sliding member 21 does not move. Thus, the sliding member 21 is controlled to slide only after the airflow speed in the outlet channel 121 increases, thereby avoiding poor cleaning effect when the airflow speed is low, which may lead to the entry of radioactive dust.

[0050] The entrance aperture adjustment assembly includes multiple forming members 22 disposed along the outer side of the probe 3. Each forming member 22 has a first contact surface and a second contact surface that contact the probe 3, with a retaining step between the first and second contact surfaces. When in a first position, the first contact surface of the forming member 22 contacts the probe 3 to form a first entrance aperture, and a gap exists between the second contact surface and the probe 3. At this time, there is a first linear distance between the end of the forming member 22 and the end of the probe.

[0051] When in the second position, the second contact surface of the forming member 22 contacts the detector member 3, and the first contact surfaces of several forming members 22 approach each other to form a second entrance hole, and there is a second linear distance between the end of the forming member 22 and the end of the detector member. The diameter of the second entrance hole is smaller than the diameter of the first entrance hole, and the second linear distance is greater than the first linear distance.

[0052] With the above settings, both the depth and size of the injection hole can be adjusted, thereby achieving both coarse and fine positioning functions, which improves positioning efficiency and accuracy.

[0053] Specifically, each forming element 22 includes an entrance aperture forming body 221 and a retaining body 222 connected to the entrance aperture forming body 221. A first contact surface is formed on the entrance aperture forming body 221, a second contact surface is formed on the retaining body 222, and a retaining step is formed between the entrance aperture forming body 221 and the retaining body 222. As mentioned above, in the first position, the first contact surface contacts the detector 3, and in the second position, the second contact surface contacts the detector 3. The first contact surfaces of several forming elements 22 approach each other to form a second entrance aperture. Therefore, in this embodiment, both the first and second contact surfaces are concave surfaces, and the first contact surface is the side of the entrance aperture forming body 221 that is close to the detector 3, and the second contact surface is the side of the retaining body 222 that is close to the detector 3.

[0054] As can be seen from the foregoing, the slider 21 is located outside the entrance aperture adjustment assembly. Therefore, the slider 21 has an inner sidewall and a plurality of slots 212 formed by recessing from the inner sidewall inward. The number of slots 212 corresponds to the number of forming members 22, so that when the slider 21 is in the first position, at least a portion of each forming member 22 is accommodated in the slot 212.

[0055] Furthermore, the entrance aperture adjustment assembly can move with the sliding assembly via the elastic assembly. Therefore, when the sliding assembly is in the first position, the entrance aperture forming body 221 is clamped on the detector 3 to form the first entrance aperture. At this time, the elastic assembly is compressed. When it is in the second position, the multiple forming bodies 22 approach each other under the bias of the elastic assembly until they fit together to form the second entrance aperture, so that the clamping step is clamped to the end of the detector.

[0056] The clamping step has a first guide slope 225, which is configured to allow the entrance aperture forming body 221 to move along the first guide slope 225 until it is clamped on the probe 3 when the sliding assembly moves from the second position to the first position.

[0057] The slot 212 has a second guide ramp 216 and a stop portion 215 connected to the second guide ramp 216. The second guide ramp 216 is configured to provide a guiding function as the forming members 22 approach each other. The stop portion 215 is configured to engage with the protrusion 223 of the forming member 22 so that the forming members 22 stop approaching each other. When the protrusion 223 engages with the stop portion 215, the engaging step engages with the end of the detector.

[0058] Furthermore, when the forming member 22 moves to the second position with the sliding member 21, in order to prevent the forming member 222 and the sliding member 21 from shifting left and right due to the fit gap, which would cause some protrusions 223 to fail to contact the stop portion 215 for locking and result in irregularities inside the injection hole affecting the positioning accuracy, the holding body 222 also has a first mating surface 224. Correspondingly, the compression ring 233 is provided with a second mating surface 234 that mates with the first mating surface 224. When the sliding member 21 moves toward the side away from the connecting rod 232, the forming member 22 can push the sliding member 21 to move axially under the push of the second mating surface 234. When the protrusions 223 contact the stop portion 215 for locking, the first mating surface 224 and the second mating surface 234 contact, further ensuring the uniformity of the inner wall of the injection hole and ensuring the positioning accuracy of the positioning device.

[0059] The elastic component includes a second elastic element 4 disposed along the height direction. One end of the second elastic element 4 is connected to the sliding component, and the other end is connected to the inlet adjustment component. The second elastic element 4 is configured to continuously apply a biasing force to the inlet adjustment component.

[0060] When the slider 21 is in the first position, the forming member 22 is accommodated in the slot 212 of the slider 21 to clamp the probe 3, and the second elastic member 4 is compressed. When the slider 21 is in the second position, the forming member 22 is located on one side of the probe 3, and the forming members 22 are fitted together under the action of the second elastic member 4 to form a second entrance hole.

[0061] In this embodiment, the second elastic element 4 is a spring.

[0062] The implementation process of the radiation source detection and positioning device in this embodiment is as follows: When the sliding member 21 is in the first position, the forming member 22 clamps the detector 3 to form a first entrance hole. At this time, the diameter of the first entrance hole is greater than or equal to the diameter of the detector 3, and the length of the first entrance hole is relatively shallow. At the same time, the radiation source detection and positioning device can obtain a wide field of view. At this time, by moving the radiation source detection and positioning device, the approximate location of the radiation source can be quickly found, and coarse positioning can be completed.

[0063] The driving member 23 drives the sliding member 21 to move from the first position to the second position, and drives the forming member 22 to move to the second position. At this time, the forming member 22 is located on one side of the detector 3, and the forming members 22 are attached to each other under the bias of the second elastic member 4 to form a second entrance hole. The diameter of the second entrance hole is smaller than the diameter of the first entrance hole, and the length of the second entrance hole is greater than the length of the first entrance hole.

[0064] During the process of the slider 21 switching from the first position to the second position, the slider 21 rotates under the action of the first rotational guide inclined surface of the first positioning block 211 and the first mating block 123 until the holding step moves to the end of the detector 3, and the forming parts 22 fit together under the bias of the second elastic member 4. At this time, the first positioning surface and the second positioning surface 217 are engaged. The drive body 231 continues to drive the connecting rod 232 to move until the extrusion ring 233 slides from one end of the sliding groove 213 to the other end, so that the second mating surface 234 of the extrusion ring 233 and the first mating surface 224 of the holding body 222 engage and contact, and the protrusion 223 of the entrance hole forming body 221 is engaged with the stop part 215, thereby ensuring the uniformity of the inner wall of the second entrance hole formed by the forming parts 22. At this time, the drive body 231 stops moving, and the position of the radiation source detection and positioning instrument can be adjusted to perform precise positioning of the radiation source.

[0065] After precise positioning is completed, the drive body 231 moves the connecting rod 232 toward the side away from the detector 3. At this time, the compression ring 233 moves first and compresses the airbag 4, while the sliding member 21 does not move. Gas is ejected from inside the airbag 4 to clean the surface of the sliding member 21. After the compression ring 233 moves a set distance (the width of the sliding groove 213), the compression ring 233 drives the sliding member 21 to move synchronously, that is, switch from the second position to the first position.

[0066] During the movement of the slider 21, the slider 21 rotates under the action of the second rotating guide inclined surface of the second positioning block 214 and the second mating block 124. As the slider 21 moves, the first positioning block 211 and the first mating block 123 abut against each other. At this time, the drive body 231 stops moving, the slider 21 is fully reset, and coarse positioning of other radiation sources can be performed.

[0067] In summary: By providing an entrance aperture adjustment mechanism 2 on the outside of the detector 3, the entrance aperture adjustment mechanism 2 can slide relative to the detector 3 to switch between a first position and a second position. In the first position, the entrance aperture adjustment mechanism 2 is housed within the main body 1; in the second position, a portion of the entrance aperture adjustment mechanism 2 is exposed outside the main body 1. The entrance aperture adjustment mechanism 2 includes a sliding assembly and an entrance aperture adjustment component partially disposed within the sliding assembly. The entrance aperture adjustment component includes multiple forming members 22 disposed around the detector 3. Each forming member 22 has a first contact surface and a second contact surface that contact the detector 3, and a retaining step exists between the first and second contact surfaces. In the first position, the first contact surface of the forming member 22 contacts the detector and forms a first entrance aperture. At this time, the forming member 22... There is a first linear distance between the end of the forming element 22 and the end of the detector element 3; when in the second position, the second contact surface of the forming element 22 contacts the detector element 3, and at this time, the first contact surfaces of several forming elements 22 approach each other to form a second entrance hole, and there is a second linear distance between the end of the forming element 22 and the end of the detector element 3; wherein, the aperture of the second entrance hole is smaller than the aperture of the first entrance hole, and the second linear distance is greater than the first linear distance, so that when the first entrance hole is formed, a wide field of view can be formed to achieve coarse positioning and improve detection efficiency; when the second entrance hole is formed, the aperture of the entrance hole is reduced and the depth of the entrance hole is increased, so as to eliminate the interference of scattered rays and other radiation sources in the accessories, while improving the sharpness of the angular resolution of the positioning instrument, making the boundary of the detection area of ​​the positioning instrument clearer, thereby achieving fine positioning and improving positioning accuracy.

[0068] In the description of the embodiments of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "center," "top," "bottom," "top," "bottom," "inner," "outer," "inner side," and "outer side," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. "Inner side" refers to the interior or enclosed area or space. "Outer perimeter" refers to the area surrounding a specific component or specific area.

[0069] In the description of embodiments of the present invention, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0070] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0071] In the description of embodiments of the present invention, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0072] In the description of the embodiments of the present invention, it should be understood that "-" and "~" represent a range of two numerical values, and this range includes the endpoints. For example, "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0073] In the description of embodiments of the present invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0074] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A radiation source detection positioner, characterized by, The application relates to a probe device, which comprises a main body, a probe fixedly arranged in the main body, an incident hole adjusting mechanism slidably arranged outside the probe, and an incident hole adjusting mechanism comprising a sliding assembly and an incident hole adjusting assembly partially arranged in the sliding assembly. The incident hole adjusting assembly comprises a plurality of forming members arranged outside the probe, each of the forming members has a first contact surface and a second contact surface in contact with the probe, and a clamping step is arranged between the first contact surface and the second contact surface. When the incident hole adjusting mechanism is in the first position, the first contact surface is in contact with the probe to form a first incident hole, and the second contact surface is spaced apart from the probe; at this time, a first linear distance is formed between the end of the forming member and the end of the probe. When the incident hole adjusting mechanism is in the second position, the second contact surface is in contact with the probe, the first contact surfaces of the forming members are close to each other to form a second incident hole, and a second linear distance is formed between the end of the forming member and the end of the probe; wherein the aperture of the second incident hole is smaller than that of the first incident hole, and the second linear distance is greater than the first linear distance. Each of the forming members comprises an incident hole forming body and a clamping body connected with the incident hole forming body, the first contact surface is formed on the incident hole forming body, and the second contact surface is formed on the clamping body. The clamping step has a first guide slope configured to enable the incident hole forming body to move along the first guide slope until being clamped on the probe when the sliding assembly moves from the second position to the first position. The sliding assembly comprises a sliding member and a transparent member arranged on the end of the sliding member away from the probe, and the sliding member is configured to move along the length direction under the action of a driving force.

2. The radiation source detection positioner of claim 1, wherein, The sliding member has an inner side wall and a plurality of notches recessed inward from the inner side wall, the number of the notches corresponds to the number of the forming members, so that part of each of the forming members is arranged in the notch when the sliding member is in the first position.

3. The radiation source detection positioner of claim 1, wherein, The notch has a second guide slope and a stop portion connected with the second guide slope, the second guide slope is configured to provide a guide function in the process of the forming members approaching each other, and the stop portion is configured to clamp a protruding portion of the forming member to stop the forming members from approaching each other.

4. The source detection and locator of claim 1 wherein, When the protruding portion is clamped with the stop portion, the clamping step is clamped with the end of the probe. The sliding assembly further comprises a plurality of first positioning blocks and second positioning blocks connected with the sliding member, and the first positioning blocks and the second positioning blocks are arranged alternately.

5. The radiation source detection positioner of claim 4, wherein, ​ ​ 6. The source detection and locator of claim 4 wherein, ​ The main body is provided with a first matching block and a second matching block which are matched with the first positioning block and the second positioning block respectively; The first positioning block and / or the first matching block has a first rotation guide slope, and the second positioning block and / or the second matching block has a second rotation guide slope; The first rotation guide slope and the second rotation guide slope are configured to enable the sliding piece to rotate along the first rotation guide slope and the second rotation guide slope.

7. The source detection and locator of claim 4 wherein, The sliding assembly further comprises a driving piece connected with the sliding piece, which is configured to drive the sliding piece to move in the length direction to switch between the first position and the second position; The driving piece comprises a driving body and a connecting rod, one end of the connecting rod is connected with the driving body, and the other end is in sliding connection with the sliding piece; The sliding piece is provided with a sliding groove near one end of the connecting rod, and the other end of the connecting rod is accommodated in the sliding groove.

8. The source detection and locator of claim 7, wherein, The sliding assembly further comprises an air bag, which is sleeved on the connecting rod; The main body is provided with an air inlet channel and an air outlet channel which are in communication with the air bag, the air outlet channel is arranged on one side of the sliding piece, and the air inlet channel is arranged on one side of the driving piece; Gas enters the air bag from the air inlet channel, the air bag is compressed in the process that the connecting rod slides towards the sliding piece, and gas enters the air outlet channel from the air bag and flows to the sliding piece.

9. The source detection and locator of claim 8, wherein, The air bag comprises a bag body and a first elastic piece arranged in the bag body, the first elastic piece is configured to assist the bag body to recover when the connecting rod slides towards the driving piece after the bag body is compressed by the connecting rod sliding towards the sliding piece.

10. The source detection locator of any one of claims 1 to 9, wherein, The incident hole adjusting mechanism further comprises an elastic assembly connecting the sliding assembly and the incident hole adjusting assembly, the elastic assembly comprises a second elastic piece arranged in the height direction, one end of the second elastic piece is connected with the sliding assembly, and the other end is connected with the incident hole adjusting assembly; The second elastic piece is configured to continuously apply a biasing force to the incident hole adjusting assembly. The main body is provided with a first matching block and a second matching block which are matched with the first positioning block and the second positioning block respectively; The first positioning block and / or the first matching block has a first rotation guide slope, and the second positioning block and / or the second matching block has a second rotation guide slope; The first rotation guide slope and the second rotation guide slope are configured to enable the sliding piece to rotate along the first rotation guide slope and the second rotation guide slope. The sliding assembly further comprises a driving piece connected with the sliding piece, which is configured to drive the sliding piece to move in the length direction to switch between the first position and the second position; The driving piece comprises a driving body and a connecting rod, one end of the connecting rod is connected with the driving body, and the other end is in sliding connection with the sliding piece; The sliding piece is provided with a sliding groove near one end of the connecting rod, and the other end of the connecting rod is accommodated in the sliding groove. The sliding assembly further comprises an air bag, which is sleeved on the connecting rod; The main body is provided with an air inlet channel and an air outlet channel which are in communication with the air bag, the air outlet channel is arranged on one side of the sliding piece, and the air inlet channel is arranged on one side of the driving piece; Gas enters the air bag from the air inlet channel, the air bag is compressed in the process that the connecting rod slides towards the sliding piece, and gas enters the air outlet channel from the air bag and flows to the sliding piece. The air bag comprises a bag body and a first elastic piece arranged in the bag body, the first elastic piece is configured to assist the bag body to recover when the connecting rod slides towards the driving piece after the bag body is compressed by the connecting rod sliding towards the sliding piece. The incident hole adjusting mechanism further comprises an elastic assembly connecting the sliding assembly and the incident hole adjusting assembly, the elastic assembly comprises a second elastic piece arranged in the height direction, one end of the second elastic piece is connected with the sliding assembly, and the other end is connected with the incident hole adjusting assembly; The second elastic piece is configured to continuously apply a biasing force to the incident hole adjusting assembly.

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